Supplementary Information for:
Fabrication of carbon nanotubes/polypyrrole/carbon
nanotubes/melamine foam for supercapacitor
Feifei Liu, Gaoyi Han, Yunzhen Chang, Dongying Fu, Feifei Yang, Zhaoyang Liu
Institute of Molecular Science, Key Laboratory of Chemical Biology and Molecular Engineering of Education
Ministry, Shanxi University, Taiyuan 030006 PR China
Preparation of different mass of CNTs loaded on MF
The slices of MF were used as substrates for the preparation of the composites. The original slices of
MF were washed by anhydrous ethanol to remove the impurities. Then the slices of MF were
immersed in the dispersion of CNTs (2 mg mL-1), sometimes the vacuum condition helps to remove
the air adsorbed in the MF. After the MF immersed completely in the solution for 3 min, they were
taken out and dried at 80 °C. To load different mass of CNTs, the above process could be repeated
different times. (As show in Table 1)
Table S1. Physical properties of the composites fabricated at different conditions
load times of CNTs
0
1
2
3
4
5
MMF / mg
10.3
10.67
10.65
10.35
10.08
10.69
MCNTs/MF / mg
ResistivityCNTs/MF/Ω·m
10.3
----
15.3
7.5
16.9
4.5
17.74
3.45
18.9
2.1
23.96
1.5
MPPy/CNTs/MF / mg
64.37
66.33
63.78
64.85
63.45
72.95
WCNTs % in composites
0
6.75
6.98
4.5
9.8
3.45
11.39
2.4
13.9
1.5
18.19
1.05
Specific capacitance total /
F g-1 (1 mV s-1)
134
146
147.2
155
144
140
Specific capacitance PPy /
F g-1(1 mV s-1)
169.5
191.6
200.17
208.6
209
206
ResistivityPPy/CNTs/MF
/Ω·m
As shown in Table 1, the composite of PPy/CNTs/MF containing 11.3% CNTs (the slices of MF
were immersed in the dispersion of CNTs for 3 times) has a better electrochemical properties, So the
composite of PPy/CNTs/MF containing 11.3% CNTs is chosen in the following experiments.
Table S2. The properties of the composites of PPy/CNTs/MF and CNTs/PPy/CNTs/MF
Samples
WPPy %
Resistivity / Ω·m
Specific capacitancePPy /
F g-1(0.4A g-1)
Specific capacitancetotal /
F g-1(0.4A g-1)
PPy/CNTs/MF
72.64
2.4
167
120
CNTs/PPy/CNTs/MF
70.2
0.75
262
184
Figure S1. SEM images of (A) pure PPy/MF, and the SEM images of composite PPy/CNTs/MF
containing different CNTs: 6.98% (B), 9.80% (C), 11.39% (D), 13.9% (E), 18.19% (F).
The energy density (W) and power density (P) of an electrode depicted in the Ragone plot were
calculated by using the equations as follow:
W
P
(1 / 8)  C s 
c V 2 1 0 0 0
3600
(1 / 8)  C s 
c V 2 1 0 0 0
t
(1)
(2)
Figure S2. The Ragone plots of the capacitors assembled by PPy/CNTs/MF and
CNTs/PPy/CNTs/MF