Electroceramics Laboratory (Jong-Sook Lee)
http://myweb.jnu.ac.kr/~jongsook/
Professor Jong-Sook Lee finished her education at Seoul National University, Korea
(B.S. in 1989, M.S. in 1991, Ph. D. in 1994 in Inorganic Materials Science and
Engineering). After some postdoctoral career at the university and then at KIST, she
joined the group of Prof. Dr. Maier at Max Planck Institute for Solid State Research,
Stuttgart, Germany. She was selected for a fellowship from Alexander von Humboldt
Foundation. After a two and half years stay in Germany she came back to join the
Creative Research Initiative Center for Microstructure Science of Materials, run by
Prof. Doh-Yeon Kim. Another two and half year work, also with a fruitful
collaboration with MPI, Germany, she decided to go abroad again this time to
National Institute of Standards and Technology, USA, hosted by Dr. S. Wiederhorn.
After two years she flew over the Atlantic and rejoined the Prof. Maier’s group in
Stuttgart, Germany, as staff scientist. During her stay she also served as Editorial
Assistant in the Editorial board of the Journal Solid State Ionics. Since July 2006 she
is the faculty member of School of Materials Science and Engineering, Chonnam
National University, Gwangju, Korea.
Through years devoted to many research projects in collaboration with major research
institutes, industry partners, and other research groups from different universities and
in campus, the Electroceramics Laboratory in JNU has gained a world-leading
expertise in in-depth electrical characterization of materials (ionic conductors, mixed
conductors, semiconductors, ferroelectrics) and the devices with those materials as
key components (batteries, fuel cells, solar cells, transducers, MLCCs). What we
investigate or are trusted with are often the issues long-time unsolved and suggested to
be of a great scientific and technological importance.
Research Interests:
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Electrical (conducting and dielectric) properties of electroceramics: solid
electrolytes, semiconductors, and mixed conductors, dielectrics, ferroelectrics
Impedance spectroscopy for energy and electronic applications
Surface/grain-boundary effects in electroceramics
Interface thermodynamics and kinetics
Interface structure – property relationship
Nanoscale effects in solid state ionics
High-temperature versus low-temperature defect chemistry
Application of electroceramics: solid oxide fuel cells, Li-ion batteries, ceramic
sensors, catalysis, photoelectrochemical cells, solar cells, ceramic capacitors,
ferroelectric devices
Selected publications:
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Moving boundary diffusion problem for hydration kinetics evidenced in nonmonotonic conductivity relaxations of proton conducting perovskites, Solid
State Ionics 272 (2015) 60-73
Photoelectrochemical Performance of ZnO Thin Film Anodes Prepared by
Solution Method, Int. J. Hydrogen Energy, (2014) 20764-20770
Electrical Characterization of Polycrystalline Sodium "-Alumina: Revisited
and Resolved, Solid State Ionics, 264 (2014) 22–35
Chemical Diffusivity for Hydrogen Storage:Pneumatochemical Intermittent
Titration Techniques, J. Phys. Chem. C, 117 (2013) 19771-19785
Pneumatochemical Immittance Spectroscopy for Hydrogen Storage Kinetics, J.
Phys. Chem. C,117 (2013) 19786-19808
A physicochemical mechanism of chemical gas sensors by an AC analysis,
Phys. Chem. Chem. Phys. 15 (23) (2013) 9361-9374
A new diagnostic tool for the percolating carbon network in the polymer matrix,
Polymer 54 (2013) 999-1003
Polarization mechanism of high temperature electrolysis in a NiYSZ/YSZ/LSM solid oxide cell by parametric impedance analysis, Solid State
Ionics, 232 (2013) 80-96
Mixed Conduction in Ceramic Hydrogen/Steam Electrodes by Hebb-Wagner
Polarization in the Frequency Domain, Fuel Cells 12 (6) 1070-1084 (2012)
Effect of Crystallographic Anisotropy and Lanthanum Stoichiometry on
Microstructural Evolution of Lanthanum Silicate Electrolytes, J. Am. Ceram.
Soc. 95[8] 2439-2450 (2012)
Nano Energy Laboratory (Jaekook Kim)
Jaekook Kim(Dept. of Materials Science and Engineering, JNU)
- Ph.D Materials Science & Eng.(with Outstanding Dissertation Award), The
University of Texas at Austin, Texas, 1995-1997.
- Title of Dissertation: Synthesis of Electrode Materials for Rechargeable
Lithium Batteries by Oxidation-reduction Reactions in Solutions (Supervised
by Prof. A. Manthiram).
- M.S. Inorganic Materials Eng., Chonnam National Univ. Korea, 1989-1991.
- B.S. Inorganic Materials Eng., Chonnam National Univ. Korea, 1985-1989.
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Research Feild
Our group intensively pursues to explore the world of nanomaterials for a variety of
technological applications. Chemical synthesis plays a critical role in accessing
nanomaterials with desired morphology and microstructures. In specific, we are
engaged in developing novel solution-based synthetic procedures to produce
nanostructured metal oxides, alloys, and carbon. The nanomaterials synthesized are
explored for electrochemical energy conversion and storage (batteries, fuel cells,
and solar cells) and electronic applications.
1. Nanomaterials Synthesis
Synthesis design greatly influences particle size/morphologies/distribution and
hence remains critical to achieve materials with enhanced properties and
performances though, in a variety of cases, equally vital factors as cost-effectiveness
and fast synthesis favoring commercialization stands compromised. Our group
pursues various synthetic techniques as polyol-based, Co-precipitation,
Solvothermal, Hydrothermal, Sol-gel, Micro-emulsion, Spray Pyrolysis, and
Microwave Assisted methods to develop nanomaterials for energy storage devices
as Lithium-ion Batteries, Solar Cells, and Fuel Cells.
2. Energy Materials(Electrode materials for battery, Solar cell, Fuel cell)
Rechargeable Li-ion batteries have hugely contributed as reliable power sources for
modern day portable electronics and presently appear poised to influence high
power applications as plug-in hybrid electric vehicles. With respect to Li-ion
batteries, nano-sized electrodes have been intensively investigated for high power
density applications as the advantage of using such electrodes remains two-fold.
Firstly, nanomaterials provide a favorable structural framework that ensures shorter
diffusion paths for the Li-ions to traverse from the core of the particles to the surface
through the lattice, thereby yielding excellent electrochemical properties. Secondly,
the large surface area of nanomaterials ensures enhanced electrode/electrolyte
interfacial contact, thus leading to higher charge/discharge rates and good capacity
retentions. We synthesized the following nano-structured electrodes as shown
below:
3. Nano material Characterization
Thermal Analysis, Rietveld Refinement, In-situ XRD, Ex-situ TEM, Ex-situ XPS,
In-situ XAFS, Ex-situ 7Li Solid NMR, In-situ Mass Spectroscopy.
Cathode
Anode
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SELECTED PUBLICATIONS:
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Vinod Mathew, Sungjin Kim, Jungwon Kang, Jihyeon Gim, Jinju Song, Joseph
Paul Baboo,Wangeun Park, Docheon Ahn, Junhee Han, Lin Gu, Yuesheng Wang,
Yong-Sheng Hu, Yang-Kook Sunand Jaekook Kim, “Amorphous iron phosphate:
Potential host for various charge carrier ions”, NPG Asia Materials., 6, e138
(2014)
Jungwon Kang, Vinod Mathew, Jihyeon Gim, Sungjin Kim, Jinju Song, Won Bin
Im, Junhee Han, Jeong Yong Lee and Jaekook Kim,“Pyro-synthesis of a high rate
nano-Li3V2(PO4)3/C cathode with mixed morphology for advanced Li-ion
batteries”, Nat. Sci. Rep., 4, 4047 (2014).
Jihyeon Gim, Vinod Mathew, Jinsub Lim, Jinju Song, Sora Baek, Jungwon Kang,
Docheon Ahn, Sun-Ju Song, Hyeonseok Yoon and Jaekook Kim, “Pyro-Synthesis
of Functional Nanocrystals”, Nat. Sci. Rep., 2, 946 (2012).
Jungwon Kang, Sora Baek, Vinod Mathew, Jihyeon Gim, Jinju Song, Hyosun Park,
Eunji Chae, Alok Kumar Rai and Jaekook Kim, “High rate performance in a
Na3V2(PO4)3/C cathode by pyro-synthesis for sodium-ion batteries”, J. Mat. Chem.,
22, 20857 (2012).
Jinsub Lim, Vinod Mathew, Kangkun Kim, Jieh Moon, and Jaekook Kim, "OnePot Synthesis of Multi-Morphous LiFePO4 Nanoparticles in Polyol Medium", J.
Electrochem. Soc., 158(6), A736 (2011).
A. Manthiram and J. Kim, “Low Temperature Synthesis of Insertion Oxides for
Lithium Batteries”, Chem. Mater., 10, 2895-2909 (1998).
Jaekook Kim and Arumugam Manthiram, "A manganese oxyiodide cathode for
rechargeable Lithium batteries", Nature, 390, 265 (1997).
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SELECTED PATENTS:
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J. Kim, “Method for preparing electrode material using polyol process, electrode
material prepared thereby, and battery including the electrode material,” Korean
Patent No. 10-1181323. Issued in 2012.
J. Kim, “Anode material with high rate-capability and high capacity for lithium
secondary battery and process for synthesizing the same,” Korean Patent No. 101134474. Issued in 2012.
J. Kim, “Lithium batteries electrode and method for manufacturing the same,”
Korean Patent No. 10-1117967. Issued in 2012.
J. Kim, “Electrode material synthetic method using ultra fast combustion method
and electrode material thereby,” Korean Patent No. 10-0999163. Issued in 2010.
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SELECTED AWARDS:
National R&D Excellent Performance 100(Best performance TOP5), KISTEP,
2013.
Best Paper Award, Korean Battery Society, 2013.
Young Investigator Award, 16th International Meeting on Lithium Batteries,
2012.
Best Paper Award, The 23rd Synchrotron Radiation User's Workshop & KOSUA
Meeting, 2011.
R&D 100 Award, R&D Magazine, 2009 (with Argonne National Laboratory)
Yongbong Academic Achievement Award, Chonnam National University, 2008.
Best Researcher Award, Chonnam National University, 2007.
Best Dissertation Award, The University of Texas at Austin, Doctoral
Convocation, May 20, 1998.
Corrosion & Energy Materials Laboratory(Chan-Jin
Park)
http://myweb.jnu.ac.kr/~parkcj/
Corrosion & Energy Materials Laboratory is a group of researchers working in
Department of Materials Science and Engineering headed by Professor Chan-Jin Park
Dr. Park received his bachelor, master and doctoral degree in the area of
Materials Science and Engineering from KAIST, then he was research associate in
Institute for Physical Chemistry and Electrochemistry, Heinrich-Heine University
Düsseldorf, Germany for 1 year. After that he worked at POSCO Research Institute as
senior researcher. In 2005, he joined as faculty member in School of Materials
Science and Engineering at Chonnam National University, where he initiated his
independent academic career. From the starting of his research career, he has
contributed to the building and reinforcing of department and enhancing the ranking
of the university as well. Presently, his group comprises 15 active members including
2 postdoctoral researchers, 3 doctoral and 8 master students along with the other
undergraduate students.
Dr. Park has achieved recognition as a leader in the areas of corrosion,
electrochemistry, energy storage and materials science. With excellent achievements,
he has served as a Director of The Corrosion Society of Korea and Director of Korean
Hydrogen and New Energy Society. Currently, he is working as an Editor of Metals
and Materials International (SCI Journal). Moreover, Dr. Park has published over 80
SCI papers, patents and contributed numerously in national and international
conferences. He has been invited to deliver seminars and lecture in various countries.
Dr. Park is the recipient of several academic and professional honors and
awards, including International Biographical Centre (IBC) “TOP 100 SCIENTISTS
2008”, “IBC Foremost Scientists of the World 2008”, Marquis Who's Who in the
World (2008-2009), Marquis Who's Who in Science and Engineering (20082009), American Biographical Institute (ABI) “MAN of THE YEAR 2009”.
His current research focuses on:
 Energy Storage & Conversion Materials
 Surface Treatments for Energy Materials
 Corrosion & electrochemical Techniques
In particular, the research is intensively concentrated on rechargeable batteries,
hydrogen storage materials, electro-catalysts, corrosion & protecting metals from
corrosion.
 Research and Education training achievements:
 Education Training: Since the beginning, the corrosion and energy materials lab. has
trained successfully 02 Ph.D and 20 M.S Scholars.
 Publications: 82 SCI papers (such as Adv. Func. Mater. Nanoscale, etc), several
patents and plenty of national and international conference papers where the quality as
well as the productivity is being enhanced.
* Recent Representative publications
1. "Carbon-interconnected Ge Nanocrystals as an Anode with Ultra-long-term
Cyclability for Lithium Ion Batteries", Advanced Functional Materials (2014)
2 "Facile and cost effective synthesis of mesoporous spinel NiCO2O4 as an anode
for high lithium storage capacity", Nanoscale (2014)
3. "B2O3 added Lithium Aluminum Gernanium Phosphate solid electrolyte for LiO2 rechargeable batteries", Dalton Transactions (2014)
4. "Conducting, additive-free, amorphous GeO2/C composite as a high capacity and
long-term stability anode for lithium ion batteries", Nanoscale (2015)
5. "Citrate gel synthesis of aluminium-doped lithium lanthanum titanate solid
electrolyte for application in organic-type lithium-oxygen batteries", Journal of
Power Sources (2015)
 Projects: Under Prof. Park’s supervision, the Corrosion & Energy Materials Lab have
implemented successfully a lot of projects including the projects granted by Korean
government and other industrial projects with highly practical applications which were
financial supported by big companies in Korea such as POSCO, HYNDAI Motors etc.
Annually, the Laboratory receives financial support from 3-5 projects independent or
in collaboration.
 Facilities (Synthesis, Analysis and Manufacture): The Lab has grown as a modern
global-extent laboratory with many purchased and collected modern instruments and
manufacture facilities such as:
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01 Won-A-Tech battery cycler with 40 channels
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03 Electrochemical measurement instruments
(02 Gamry potentiostat and 01 Zive)
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02 Reaction chambers
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03 Modern furnaces
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02 Glove boxes
01 Salt spray chamber
01 TG-DSC/DTA instrument
Other modern analysis instruments in common facility centers: SEM,
TEM, XRD, XPS, FTIR …
Clean Energy Technology Laboratory(Sung June Cho)
http://cetl.jnu.ac.kr/
 Prof. Sung June Cho
Professor of Chemical Engineering, School of Applied Chemical Engineering,
Chonnam National University, Yongbong 300, Gwangju 500-757, KOREA
Contact Information
- Tel
: +82-62-530-1902
- Cell Phone : +82-10-3464-3528
- FAX
: +82-62-530-1819
- E-mail
: sjcho@chonnam.ac.kr
Professional Preparation:
- Korea Advanced Institute of Science and Technology, B. A., Chemistry 1992
- Korea Advanced Institute of Science and Technology, M. A., Chemistry 1994
- Korea Advanced Institute of Science and Technology, Ph.D., Chemistry 1997
Appointments:
- Professor of Chemical Engineering, CNU
- Associate Professor of Chemical Engineering, CNU
- Assistant Professor of Chemical Engineering, CNU
- Senior Researcher, Korea Energy Research Institute
2012 4. - present
2007 4. - 2012 3.
2003 1. - 2007 3.
1997. 5 - 2002.12
Awards:
- Young Scientist Prize (International Association of Catalysis Societies) 2004
- Best Paper Award (IUMRS-ICA-2006) 2006
Recent Publications
- Ik Jun Jang, Hye Sun Shin, Na Ra Shin, Su Hyun Kim, Su Kyum Kim, Myoung
Jong Yu,Sung June Cho, “Macroporous–mesoporous alumina supported iridium
catalyst for hydrazine decomposition” Catalysis Today 2012, 185, 198– 204
- Ja Hun Kwak, Russell Tonkyn, Diana Tran, Donghai Mei, Sung June Cho, Libor
Kovarik, Jong H. Lee, Charles H. F. Peden, and János Szanyi “Size-Dependent
Catalytic Performance of CuO on γ-Al2O3: NO Reduction versus NH3 Oxidation”
ACS Catal. 2012, 2, 1432−1440
- Ja Hun Kwak, Do Heui Kim, Ja´nos Szanyi, Sung June Cho, Charles H. F. Peden "
Enhanced High Temperature Performance of MgAl2O4-Supported Pt–BaO Lean
NOx Trap Catalysts" Top Catal 2012, 55, 70–77
- Abdelaziz Rahy , Chen Zho, Jie Zheng a, S.Y. Park , Moon J. Kim , Ikjun Jang
,Sung June Cho, Duck J. Yang "Photoluminescent carbon nanoparticles produced
by confined combustion of aromatic compounds" Carbon 2012, 50, 1298-1302.
- Sunbum Kwon, Hye Sun Shin, Jintaek Gong, Jae-Hoon Eom, Aram Jeon, Sung
Hyun Yoo, Im Sik Chung, Sung June Cho, and Hee-Seung Lee "Self-Assembled
Peptide Architecture with a Tooth Shape: Folding into Shape" J. Am. Chem. Soc.
2011, 133, 17618–17621.
 About the Laboratory
The Clean Energy Technology Laboratory, CETL was founded at Graduate School
of Engineering in 2003. Energy related materials are the major objective of CETL
starting from the synthesis to the application. The CETL maintained the state of art
research facilities for the characterization of the materials and also the corresponding
catalytic application.
In 2010, the CETL was succeeded in the commercialization of the catalytic material
for the propulsion system implemented in Korea Multi-purpose Satellites. Recent
research interests are the synthesis and characterization of nano-structured materials
for energy conversion and storage using X-ray absorption fine structure, solid nuclear
magnetic resonance, transmission electron microscopy etc. Very recently, the CETL
started the new research project for carbon dioxide capture and storage funded by
KCRC.
Major Interest:
- Synthesis and characterization of nano-structured materials using X-ray absorption
fine structure, solid nuclear magnetic resonance, transmission electron microscopy etc.
- Structural determination using lab XRD or synchrotron XRD pattern with the
Rietveld method for inorganic and microporous material.
- Technology of energy conversion and storage using nano-structured material
Current Research Topics
- Structural investigation of nano-structured materials, zeolite, MOF, etc. and those
catalytic and environmental application.
- The state of art characterization technique for the polycrystalline structure using
Synchrotron X-ray Powder Diffraction.
Ongoing Research Grants
- Material for Carbon dioxide capture and storage funded by Korea carbon dioxide
capture and sequestration R&D center
- Green propellant synthesis and characterization funded by Agency for Defense
Development
- Catalyst Granulation funded by LG Chemical Research Park.
Synergistic Activities:
- Principal researcher in 21st Century Frontier program funded by Korea Science
Engineering Foundation, 2006-2008
- Researcher in Global Partnership Program funded by Korea Foundation of
International Cooperation of Science and Technology, 2006-present.
- Principal researcher in hydrazine decomposition technology for KOMSAT-[n]
series: Catalyst development and testing for satellite attitude and altitude control,
2004-present.
Energy Conversion & Storage Processing laboratory
(Yun-Sung Lee), http://myweb.jnu.ac.kr/~leeys
Energy Conversion & Storage Processing Laboratory is a group of researchers
working in Department of Advanced Chemical Engineering headed by Professor YunSung Lee. In our laboratory, we currently performs a variety of research on lithium
secondary battery, Capacitor, lithium-air batteries for the next-generation energy
systems such as conversion of eco-friendly and energy-saving systems.
Prof. Yun-Sung Lee is current working as Professor at Chonnam
National University in Korea. He received his M.S from Chonbuk
National University in 1998 and the research work was carried out
about lithium secondary battery. He received Ph.D in 2001 in
Applied Chemistry from Saga University in Japan under the
direction of Prof. Masaki Yoshio. He joined in 2001 as a Post-
Doctoral Fellow as Doctoral Researcher at Kanagawa University in Japan. He joined
in 2003 at Chonnam National University as Assistant Professor. He has authored and
co-authored over 150 peer-reviewed international publications including Chemical
Review (IF = 45.661) and is an active member of the lithium secondary battery field.
His research interests are in the fields of Li-ion battery, Li-air battery, and hybrid
capacitor systems. Presently, his group comprises 7 active members including 3
doctoral and 4 master students along with the other undergraduate students.
Research Interests:
 Synthesis and improving properties of electrode materials for lithium
secondary batteries
 Development of solid electrolytes for all-solid-state batteries
 Development of electrode materials for lithium air battery
 Hybrid Capacitor system and development of electrode materials
Selected publications: (155 papers)
 “Insertion type electrodes for non-aqueous Li-ion capacitors”, Chemical
Review, 14(23), 11619-11635 (2014) (IF=45.661).
 “Constructing of high energy density supercapacitors from pinecone derived
high surface area carbons”, ChemSUSChem, 7(5) 1435-1442 (2014)
(IF=7.117).
 “A novel high-energy hybrid supercapacitor with an anatase TiO2-reduced
graphene oxide anode and an activated carbon cathode”, Advanced Energy
Materials, 3(11) 1500-1506 (2013) (IF=14.385).
 “Graphene-nanotube-iron hierarchical nanostructure as lithium ion battery
anode", ACS Nano, 7(5) 4242-4251 (2013) (IF=12.033).
 “High performance hybrid capacitor with Li2CoPO4F cathode and activated
carbon anode”, Nanoscale, 5(13) 5958-5964 (2013) (IF=6.739).
 “Flexible energy storage devices based on graphene paper”, Energy &
Environmental Science, 4(4) 1277-1283 (2011) (IF=15.49).
Facilities (Synthesis, Analysis and Manufacture):
The Lab has grown as a modern global-extent laboratory with many purchased and
collected modern instruments and manufacture facilities such as:
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Battery cycler
Electrochemical measurement instruments
Vacuum chambers
Tube and box furnaces
Glove boxes
TGA/DTA instrument
Above this, other modern analysis instruments in common facility centers: SEM,
TEM, XRD, XPS, FTIR …
Electrochemical Energy Materials Laboratory (Jeong Woo Yun)
Electrochemical Energy Materials Laboratory is a group for researching on a variety
of energy materials and its applications in School of Chemical Engineering.
Professor Jeong Woo Yun, who is leading the group, received Ph.D degree in the
Department of Chemical Engineering, University of Missouri, USA (2007). After the
graduation, he joined in Laboratory for Transformation Fuels and Polymer Processing,
Missouri University of Science and Technology in USA as a post-doctoral fellow.
After 1 year, he came back to Korea and joined in Fuel cell Research Center at Korea
Institute Science & Technology (KIST), Korea. In 2011, he joined as a faculty
member in School of Applied Chemical Engineering, Chonnam National University,
Korea.
Dr. Yun is currently a member of the Society of the Korean Institute of Chemical
Engineers, the Korean Electrochemical Society and the Korean Society of Industrial
and Engineering Chemistry.
Dr. Yun achieved recognition as a leader in the area of Solid Oxide Fuel Cells for
electrochemical reaction, analysis of internal reforming, alternative electrode
development, and fuel cell system. He is also renowned in the area of permeability
analysis in ceramic bodies, supercritical fluids for binder extraction, plasma coatings
for anti-corrosions, and a comprehensive process technology of biomass to hydrogen
conversion. His emerging research group, currently, comprises 7 active members (5
master students and 2 undergraduate students) and they are researching on fuel
reforming, alternative electrode development in SOFCs, plasma coating for heat
exchangers, etc.
Research Interests
- Solid Oxide Fuel Cells (SOFCs)
- Proton Exchange Membrane Fuel Cells (PEMFCs)
- Alternative electrode materials development
- Electrochemical catalyst developments
- Internal Reforming in SOFCs
- Analysis of carbon deposition and sulfur poisoning
- Plasma coatings for hydrophilic and anti-corrosions and its applications
- Interface thermodynamics and kinetics
Research Facilities
- Uniaxial presser, Impedance, DC loader, High temperature furnaces, Gas
chromatograph, Reforming reactors, Button cell SOFCs test systems, Spot
welder, Ball millings, ovens, etc.
Selected publications
1. Seung Jin Lee, Jeong Myeong Lee, Yoon Gon Kim, Soon Do Yoon, Jeong Woo
Yun*, “Thermal cycle development of PMMA pore former removal for honeycombtype SOFC supports” Ceramics International, 40, 4879-4887 (2014)
2. Jeong Myeong Lee, Yoon Gon Kim, Seung Jin Lee, Hee Su Kim, Sung Pil Yoon,
Suk Woo Nam, Soon Do Yoon, Jeong Woo Yun*, “Carbon-tolerance effects of
Sm0.2Ce0.8O 2-d modified Ni/YSZ anode for solid oxide fuel cells under methane fuel
conditions” Journal of Applied Electrochemistry, 44, 581-588 (2014)
3. Jeong Woo Yun, Hyung Chul Ham, Hee Su Kim, Shin Ae Song, Suk Woo Nam,
Sung Pil Yoon*, “Effects of the Sm0.2Ce0.8O2-d Modification of a Ni-based Anode on
the H2S Tolerance for Intermediate Temperature Solid Oxide Fuel Cells” Journal of
the Electrochemical Society, 160(2), F153-F161, (2013)
4. Jeong Woo Yun*, The Effect of Plasma Surface Treatment on a Porous Green
Ceramic Film with Polymeric Binder Materials, Plasma Science and Technology,
15(6), 521-527 (2013)
5. Kug-Seung Lee, Song Jong Yoo, Yoon-Chae Nah, Hee Su Kim, Kyu-Sung Park,
Jeong Woo Yun*, “Oxygen Reduction Reaction of Pt Supported on Y-Doped
SrTiO3” Electrochemical and Solid-State Letters, 15(5) B61-B64 (2012)
6. Jeong Woo Yun, Sung Pil Yoon*, Hee Su Kim, Jonghee Han, Suk Woo Nam,
“Effect of Sm0.2Ce0.8O1.9 on the carbon coking in Ni-based anodes for solid oxide fuel
cells running on methane fuel” International Journal of Hydrogen Energy, 37, 43564366 (2012)
7. Sung Jong Yoo, Kug-Seung Lee, Seung Jun Hwang, Yong-Hun Cho, Soo-Kil Kim,
Jeong Woo Yun, Yung-Eun Sung, Tae-Hoon Lim*, “Pt3Y electrocatalyst for oxygen
reduction reaction in proton exchange membrane fuel cells” International Journal of
Hydrogen Energy, 37, 9758-9765 (2012)
8. Jeong Woo Yun, Sung Pil Yoon*, Sang Gyun Park, Hee Su Kim, Suk Woo Nam,
“Analysis of the regenerative H2S poisoning mechanism in Ce0.8Sm0.2O2-d coated
Ni/YSZ anodes for intermediate temperature solid oxide fuel cells” International
Journal of Hydrogen Energy, 36, 787-796 (2012)
Polymer Energy Materials Laboratory
(Chang Kook Hong)
Prof. Chang Kook Hong
Associate Professor,
Department of Chemical Engineering,
Chonnam National University
Samsung Electronics (2004 ~ 2006)
Postdoctoral Fellow, U. of Delaware, (2001 ~ 2003)
Ph.D.: The University of Akron, USA.
B. S.: Chonnam National University, Korea
Research Interest
Polymer Energy Materials Laboratory is devoted for nanomaterials synthesis and
application towards low cost efficient solar cells, redox flow batteries, supercapacitors
and polymer electronic materials.
Solar cell
In solar cell research, our laboratory focus on perovskite solar cells and polymeric
flexible solar cells. Recently, we have achieved variety of composition of perovskite
like MAPbI3, MAPbBr3, FAPbBr3 and FAPbI3 and successfully used for mp-TiO2, and
low temperature processed 1D/3D hydrothermally grown TiO2 nanostructures having
~16% power conversion efficiency. Currently our research is focused on flexible
perovskite solar cells and results are promising.
Redox flow Battery
Our group also focus on V2O5 based redox flow battery using graphene, polymer
membrane and carbon felt.
Supercapacitors:
Graphene and r-GO based supercapacitors have been developed and tested
successfully for energy storage applications.
Selected publications:
“Once again, organometallic tri-halide perovskites: Efficient light harvester for solid
state perovskite solar cells”, Materials Today (2015)
“Ultrathin Atomic Layer Deposited TiO2 for Surface Passivation of Hydrothermally
Grown 1D TiO2 Nanorod Arrays for Efficient Solid-State Perovskite Solar Cells”,
Chemistry of materials (2015)
“Novel hybrid solar cells based on alpha-copper phthalocyanine-cadmium sulfide
planar heterojunction”, Journal of materials science (2014)
“Low-Cost Electrospun Highly Crystalline Kesterite Cu2ZnSnS4 Nanofiber Counter
Electrodes for Efficient Dye-Sensitized Solar Cells”, ACS applied materials &
interfaces (2014)
“Synthesis and characterization of planar heterojunction hybrid polymer solar cells
based on copper pthalocyanine (CuPc) and titanium dioxide”, Ceramics
international (2014)
“Successive ionic layer adsorption and reaction deposited kesterite Cu2ZnSnS4
nanoflakes counter electrodes for efficient dye-sensitized solar cells”, Materials
research bulletin (2014)
“Polyvinylpyrrolidone (PVP) assisted single-step synthesis of kesterite Cu2ZnSnS4
nanoparticles by solvothermal process”, Physica status solidi-rapid research letters
(2013)
Surfactant free most probable TiO2 nanostructures via hydrothermal and its dye
sensitized solar cell properties, Scientific reports (2013)
Facilities (Synthesis, Analysis and Manufacture): The Lab has grown as a polymer
energy material laboratory with many purchased and collected modern instruments
and manufacture facilities such as:
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Glove box with programmable spin coater
Solar Simulator
Modern furnaces
Electrochemical work station
Paste mixer
Electrospinning
VRFB testing cell
Vacuum dry oven
Chemical Hood
High temperature nitrogen tube furnace
Photonic and Electronic Thin Film Laboratory
(Jin Hyeok Kim), http://pvsolar.chonnam.ac.kr/
Professor Jin Hyeok Kim received his bachelor, master and doctoral degree in the
area of Materials Science and Engineering from KAIST, then he was research
associate at UC Santa Babara, USA, and ISIR-Sanken, Osaka University in Japan. In
1999, he joined as faculty member at Chonnam National University.
He is Permanent Member of the Materials Research Society of Korea and the Korean
Ceramic Society. He is also General Affairs Director of the Materials Research
Society of Korea. He has also served as Editorial Board Member of the Materials
Research Society of Korea and EML
Research Activities:
Professor Jin Hyeok Kim is leading a very successful research group with an
established international reputation for its work in chalcogenide thin films and
functional metal oxides. The aim of the Lab is to improve existing thin film
technologies and to develop low cost solar cells. Areas of research include:
 Fabrication and characterization of chalcogenide thin film solar cells by
various methods.
 Fabrication and characterizations of TCO thin films.
 Synthesis of functional oxide materials by low cost hydrothermal synthesis
method at 90 oC.
 Materials characterization using TEM.
 Planner light wave circuits (PLC)
 Quantum dot sensitized solar cells (QDSSC)
More than 60 master students and 10 Ph.D. students are graduated. Currently 7 Ph.D.
students and 3 Post doctorate students are working in the lab along with 12 mater
students.
Research Facilities:
The full structure solar cell and device characterization in Lab allows students to study
all aspects of the device performance. The facilities are as follows:
 Thin film fabrications:
 Physical method: RF and DC co-sputter, RF sputters (2), DC sputter, PLD,
evaporator, metal sputter
 Chemical method: spin coaters (2), electro-deposition system, buffer
deposition bath system
 Material processing:
 Several furnaces, RTA (rapid thermal annealing), Ion milling system (IMS),
centrifuge, polishing machine for TEM, hot-injection,
RTA for
sulfurization and selenization of thin film precursors, CIP, ball milling, hot
plate, agitator, water distiller
 Characterization:
 UV visible spectrometer, Solar simulator, XRD, Several furnaces, RTA (rapid
thermal annealing), Ion milling system (IMS), centrifuge
Research Highlights:
Intensive research has been focused on the synthesis on CZTS thin film solar cells
by various physical and chemical methods. Namely, sputtering, pulsed lased
deposition, electrodeposition, SILAR, hydrothermal, hot injection and sol-gel In
particular, we have achieved the photon conversion efficiency (PCE) of 9.24% for the
sputtered CZTS absorber layer prepared from the metallic stacking and 4.5% by metal
sulfide stacking. Our aim is to achieve CZTS thin film solar cells (TFSC) with PCE
>10% for large area.
Selected Publications:
1. Jin Hyeok Kim, Eun Mi Kim, David Andeen, Daniel Thomson, Steven P. DenBaars, and
Fred. F. Lange, "Growth of heteroepitaxial ZnO thin films on GaN-buffered Al2O3 (0001)
substrates by low temperature hydrothermal synthesis at 90oC," Advanced Functional
Materials 17, 463-471 (2007).
2. S e u n g W o o k Shina,InYoungKimb,Gyoung Hoon Leeb, G.L.Agawaneb, A.V.Mohokarc,
Gi-Seok Heod, Jin Hyeok Kimb,*and Jeong Yong Leea,**,“Design and grow th of
quaternary Mg and Gaco-doped ZnO thin films with transparent conductive
characteristics” Crystal Growth & Design 11 (11), (2011) 4819–4824
3. Uma Ghorpade, Mahesh Suryawanshi, Seung Wook Shin, Kishor Gurav, Pramod Patil,
Sambhaji Pawar, Chang Woo Hong, Jin Hyeok Kim and Sanjay Kolekar, “Towards
environmentally benign approaches for the synthesis of CZTSSe nanocrystals by a hot
injection method: a status review”. Chemical Communications 50 (2014) 11258-11273
4. M. P. Suryawanshi, S. W. Shin, U. V. Ghorpade,K. V. Gurav, C. W. Hong, G. L. Agawane,
J. H. Moon, Jae Ho Yun, P. S. Patil, J. H. Kim, A. V. Moholkar, “Improved
photoelectrochemical performance of Cu2ZnSnS4(CZTS) thin films prepared using
modified successive ionic layer adsorption and reaction (SILAR) sequence”,
Electrochimica Acta 150 (2014) 136-145.
5. Seung Wook Shin, Woo Ri Bae, Jun Hee Han, K.V. Gurav, Hyo Rim Jung, M.P.
Suryawanshi, P.S.Patil, Jeong Yong Lee, JinHyeok Kim, “Size and shape controlled
hydrothermally synthesis of kesterite Cu2ZnSnS4 nanocrystals without toxic chemicals”
RSC Advances 4 (2014) 32530-32533
6. Umakant M. Patil,Ji Soo Sohn, Sachin B. Kulkarni,Su Chan Lee,Hyung Goo Park,Kishor
V. Gurav, J.H. Kim, and Seong Chan Jun, “Enhanced Supercapacitive Performance of
Chemically Grown Cobalt–Nickel Hydroxides on Three-Dimensional Graphene Foam
Electrodes,” Applied Materials & Interfaces, 6 (2014) 2450-2458, (2014.02)
7. M.P. Suryawanshi, P. S. Patil, S. W. Shin, K. V. Gurav, G. L. Agawane, M.G. Gang, Jin
Hyeok Kim, A. V. Moholkar "The synergistic influence of anionic bath immersion time
on the photoelectrochemical performance of CZTS thin films prepared by modified
SILAR sequence" RSC Advances 4 (201404) 18537-18540
Functional Inorganic Materials for Energy Laboratory
(Won Bin Im), http://fine.jnu.ac.kr
Functional Inorganic Materials for Energy Laboratory is a group of researchers
working in Department of Materials Science and Engineering headed by Professor Im,
Won Bin.
Dr. Im received his master and doctoral degree in the area of Materials Science
and Engineering from KAIST, then he was research associate in Solid State Lighting
and Energy Center, University of California, USA for 3 years. In 2010, he joined as
faculty member in School of Materials Science and Engineering at Chonnam National
University, where he initiated his independent academic career. From the starting of
his research career, he has contributed to the building and reinforcing of department
and enhancing the ranking of the university as well. Presently, his group comprises 12
active members including 1 postdoctoral researcher, 4 doctoral and 6 master students
along with the other undergraduate students.
Dr. Im has achieved recognition as a leader in the areas of designing new
phosphors for white-LED by integrating Rietveld refinement, fabrication of high
efficient white-LED using new LED structure, analysis on structure of ceramic
materials using diffraction techniques (synchrotron, neutron, X-ray), energy storage
and materials science. Dr. Im has published over 70 SCI papers, patents and
contributed numerously in national and international conferences. He has been invited
to deliver seminars and lecture in various countries.
Dr. Im is the recipient of several academic and professional honors and awards,
including, Outstanding Postdoctoral Research Achievement Award (2009), Marquis
Who's Who in Science and Engineering (2011-2012).
His current research focuses on:
 Designing of new phosphors for white-LED by integrating Rietveld
refinement with experiments.
 Fabrication of high efficient white-LED using new LED structure.
 Novel synthesis technique, characterizing properties of nanoparticle
materials used for white-LED.
 Development of new ceramic materials in view of crystal chemistry and
physics.
 Analysis on a structure of ceramic materials using diffraction techniques
(synchrotron, neutron, X-ray).
 Cathode/anode materials for battery application.
Research and Education training achievements:
 Education Training: Since the beginning, the functional inorganic materials
for energy lab have trained successfully 06 M.S Scholars.
 Publications: 74 SCI papers (such as ACS Appl. Mater. Interfaces,
Scientific Report, Chem. Mater, etc), several patents and plenty of national
and international conference papers where the quality as well as the
productivity is being enhanced.
* Recent Representative publications
1."Vapor-phase deposited conductive polypyrrole composite papers:
effects of co-vapors", Scientific Report (2015) (accepted)
2 “Stacked quantum dot embedded silica film on phosphor plate for
superior performance of white LEDs", ACS Appl. Mater. Interfaces
(2014)
3. “Pyro-synthesis of a high rate nano-Li3V2(PO4)3/C cathode with
mixed morphology for advanced Li-ion batteries” Scientific Report,
(2014)
4. "Facile synthesis of electrospun Li1.2Ni0.17Co0.17Mn0.5O2 nanofiber,
and its enhanced high-rate performance for lithium-ion battery
applications", ACS Appl. Mater. Interfaces (2013)
 Projects: Under Prof. Im’s supervision, the functional inorganic materials
for energy laboratory have implemented successfully a lot of projects
including the projects granted by Korean government and other industrial
projects with highly practical applications. Annually, the Laboratory
receives financial support from 3-4 projects independent or in collaboration.
 Facilities (Synthesis, Analysis and Manufacture): The Lab has grown as a
modern global-extent laboratory with many purchased and collected
modern instruments and manufacture facilities such as:
 Nagano BTS 2004H battery cycler with 30 channels
 Electrochemical measurement instruments
 Reaction chambers
 Modern furnaces
 Glove boxes
 Photoluminescence spectroscopy with hand-made thermal controller
 UV-Vis spectroscopy
 Electroluminescence spectroscopy
 Quantum dot synthesis instrument
 Centrifuge
 Other modern analysis instruments in common facility centers: SEM, TEM,
XRD, XPS, FTIR …
Nano Photonic Devices Lab (Jun-Seok HA)
http://npdl.jnu.ac.kr/
Nano Photonic Devices Lab. is a group for the research about nano devices and nano
materials related with photonics and energy. Especially compound semiconductor
materials are focused on for the application of Light Emitting Diodes, Solar Cells and
Hydrogen Generation. Currently, 3 Ph.D. students, 4 master course students, and 3
undergraduate students are advised by Professor Jun-Seok HA.
Professor Jun-Seok HA got his Ph. D. from Seoul National University,
majoring in materials science and engineering in 2002. During his Ph. D. courses he
visited Professor King-Ning Tu’s group in University of California at Los Angeles,
USA for the joint research on microstructural investigation for electronic packaging.
After graduation, he started to work for LG Electronics Institute of Technology,
Seoul, Korea until 2006 as a chief research engineer. There, he worked for the
development of novel LED devices. In 2006, he moved to Tohoku University, Sendai,
Japan, as an assistant professor. During the period in Japan, he taught graduate
students and researched the epitaxial growth of compound semiconductor. Also, he
managed a Tohoku University Research Consortium for free standing bulk GaN
which consisted of 5 international companies. In 2008, he joined the department of
materials science and engineering of University of California, Santa Barbara USA, as
a faculty staff. In UCSB, he also worked as a project scientist to manage LED
research group under a guidance of Professor Shuji Nakamura who is a Nobel
Laureate in physics, 2014. Since 2010, he is working as a faculty member in School of
Applied Chemical Engineering at Chonnam National University, Gwangju, Korea.
Professor Jun-Seok HA has published over 60 SCI papers, over 10 international
patents and over 25 Korean domestic patents. Professor Jun-Seok HA is listed as a
prominent researcher in several biographical dictionaries including International
Biographical Centre (IBC), Marquis Who's Who for many years. Also, He is the
recipient of Outstanding Research Achievement Award (2009) from SSLEC, UCSB.
NPDL’s research fields are related with nano photonic devices and materials
and their applications. Research topics are listed below.
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•
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GaN based Lighting Emitting Diodes (LEDs)
: Epitaxial Growth, GaN on Silicon, Semipolar/Non-polar issues, Novel LED
structure and process, Contacts, Simulation, and Thermal Managements
Hydrogen generation by Photoelectrochemical reaction
: Direct solar water splitting using compound semiconductor photo-electrode
Hybrid LEDs and Solar Cells
: Hybrid devices with Polymer/inorganic materials and its applications
•
•
Graphene/Carbon Nanotube applications
: Transparent Conductive Film application, Heat Dissipation Module, etc.
Analysis of nano materials and nano photonic devices
Selected publications:
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Enhanced Solar Hydrogen Generation of High Density, High Aspect Ratio,
Coaxial InGaN/GaN Multi-quantum Well Nanowires, NANO ENERGY 12,
(2015) 2211-2855
Effect of Double-Layered n-Type GaN on the Photoelectrochemical Properties
in NaOH Aqueous Solution, JOURNAL OF THE ELECTROCHEMICAL
SOCIETY 162, (2015) H19 - H22
Stress relaxation of GaN microstructures on a graphene-buffered Al2O3
substrate, PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS 8, (2014)
341 - 344
The effect of ITO/Mo/MoO3 anode multilayer film on efficient hole extraction
in MEH–PPV/ZnO NP hybrid solarcells, CERAMICS INTERNATIONAL 40,
(2014) 16281 – 16285
Effect of oxygen incorporation in a-plane GaN on p-type ohmic contact
property, JAPANESE JOURNAL OF APPLIED PHYSICS 53, (2014)
090307(1) - 090307(2)
The Effect of Rapid Temperature Annealing with N2 and H2 on
Photoelectrochemical Properties of u-TiO2, JOURNAL OF THE
ELECTROCHEMICAL SOCIETY 160, (2013) H800 - H802
Enhanced luminous efficacy in phosphorconverted white vertical lightemitting diodes using low index layer, OPTICS EXPRESS 21, (2013)
6353 - 6359
The polarization field dependence of Ti/Al based Ohmic contacts on Ntype semipolar GaN, APPLIED PHYSICS LETTERS 100, (2012),
091104(1) - 091104(3)
Facilities: NPDL is possible for full line of cleanroom facilities as below. Especially,
Chemical Vapor Deposition chambers (MOCVD, HVPE) are available for the growth
of compound semiconductor materials.
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•
•
Metal Organic Chemical Vapor Deposition Chamber
Hydride Vapor Pressure Epitaxy Chamber
Physical Deposition Tools
: E-beam evaporator, PECVD, Sputter
•
•
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Etcher
: Metal ICP-RIE dry etcher, Oxide Etcher, GaN ICP-RIE dry etcher
Photolithography
: Spin Coater, Mask Aligner, Baking facility
Photoelectrochemisty Facility
: Potentiostat P-4000, Xe-lamp, Temperature Dependent Hall measurement
system etc.
Other modern analysis instruments in common facility centers: SEM, TEM,
XRD, XPS, Raman Spectroscopy, Photoluminescence system etc.