Supporting Information for
Activated Carbon/ Manganese Dioxide Hybrid Electrodes for
High Performance Thin Film Supercapacitors
Yunseok Jang*, Jeongdai Jo, Hyunjung Jang, Inyoung Kim, Dongwoo Kang and
Kwang-Young Kim
Department of Printed Electronics,
Korea Institute of Machinery & Materials, Daejeon, 305-343, Korea.
Table S1. Comparison of various AC/MnO2 hybrid electrodes from the literature.1
Literature
Literature
Literature
Literature
Literature
A2
B3
C4
D5
E6
AC type
AC
ACB
Graphite
CNT
CAG
MnO2 type
Nanorod
Nanowire
Powder
Film
Film
0.5 M
6M
0.1 M
1M
1M
Li2SO4
KOH
K2SO4
Na2SO4
Na2SO4
201 F/g
375 F/g
8.9 mF/cm2
253 F/g
110 F/g
Component
Electrolyte
Capacitance
-1-
Figure S1. Cyclic voltammogram curves of (a) the FAC electrode and (b) the FAC/MnO2
hybrid electrode at different scanning rates.
Figure S2. Charge/discharge behaviors of (a) the FAC electrode and (b) the FAC/MnO2
hybrid electrode at different current density. Inset : digital camera image of the assembled
2032 coin type cells.
S1. Specific Energy Densities and Power Densities of Supercapacitors
The slope of the discharge curve can be used to determine the specific capacitance of
supercapacitor by using the equation7 below
Csp 
I
1
1
(

)
dV/dt m1 m2
Where, where I represents the discharge current, dV/dt is the slope of the discharge curve, and m
-2-
is the weight per electrode of the active material. The specific capacitances (i.e., the current
density of 1 A/g) for the FAC supercapacitors and the FAC/MnO2 hybrid supercapacitors shown
are about 52.3 and 123.2 F/g, respectively. In addition, the specific energy densities (W = CV2/2,
where V is the potential)8 are 2.2 and 6.2 Wh/kg, respectively. The specific power densities
(P=W/Δt, where Δt is the discharge time)8 are 3.0 and 3.6 kW/kg, respectively.
References
1
H. –Q. Wang, Z. –S. Li, Y. –G. Huang, Q. –Y. Li, X. –Y. Wang, J. Mater. Chem. 20, 3883
(2010).
2
Q. Qu, P. Zhang, B. Wang, Y. Chen, S. Tian, Y. Wu, R. Holze, J. Phys. Chem. C, 113, 14020
(2009).
3
L. Bai, Z. Wang, X. Wang, X. Zhang, W. Long, H. Wang, J. Li, International Journal of
Electrochemistry, 2011, 692603 (2011).
4
M. Wu, G. A. Snook, G. Z. Chen, D. J. Fray, Electrochem. Comm. 6, 499 (2004).
5
P. -C. Chen, G. Shen, Y. Shi, H. Chen, C. Zhou, ACS Nano 4, 4403 (2010).
6 A. E. Fischer, K. A. Pettigrew, D. R. Rolison, R. M. Stroud, J. W. Long, Nano Letters 7, 281,
(2007).
7
K. Zhang, L.L. Zhang, X.S. Zhao, J. Wu, Chem. Mater. 22 (2010) 1392-1401.
8
P. -C. Chen, G. Shen, S. Sukcharoenchoke, C. Zhou, Appl. Phys. Lett. 94 (2009) 043113.
-3-