ZHOU Guang-min, WANG Da-wei, LI Feng, ZHANG Li-li, WENG Zhe, CHENG Hui-ming. The effect of carbon particle morphology on the electrochemical properties of nanocarbon/polyaniline composites in supercapacitors. New Carbon Mater., 2011, 26(3): 180-186. doi: 10.1016/S1872-5805(11)60075-9
Citation:
ZHOU Guang-min, WANG Da-wei, LI Feng, ZHANG Li-li, WENG Zhe, CHENG Hui-ming. The effect of carbon particle morphology on the electrochemical properties of nanocarbon/polyaniline composites in supercapacitors. New Carbon Mater., 2011, 26(3): 180-186. doi: 10.1016/S1872-5805(11)60075-9
ZHOU Guang-min, WANG Da-wei, LI Feng, ZHANG Li-li, WENG Zhe, CHENG Hui-ming. The effect of carbon particle morphology on the electrochemical properties of nanocarbon/polyaniline composites in supercapacitors. New Carbon Mater., 2011, 26(3): 180-186. doi: 10.1016/S1872-5805(11)60075-9
Citation:
ZHOU Guang-min, WANG Da-wei, LI Feng, ZHANG Li-li, WENG Zhe, CHENG Hui-ming. The effect of carbon particle morphology on the electrochemical properties of nanocarbon/polyaniline composites in supercapacitors. New Carbon Mater., 2011, 26(3): 180-186. doi: 10.1016/S1872-5805(11)60075-9
1. Shenyang National Laboratory for Materials Science, Institute of Metal Research,
2.
Chinese Academy of Sciences,Shenyang 110016, China;
Funds:
National Science Foundation of China (50921004 and 50632040), K.C. Wong Education Foundation, Hong Kong, Chinese Academy of Sciences and the University of Queensland (ECR009132 and NSRSU600211).
Nanocarbon/polyaniline (PANI) composites were prepared by in situ polymerization of aniline on carbon blacks (CB), carbon nanotubes (CNTs) and graphene nanosheets (GNSs). The GNS/PANI composite has the highest PANI content with high specific capacitance, low internal resistance as well as improved cycling stability and rate capability. Of the three, the GNS/PANI composite shows better performance than CB/PANI and CNT/PANI. This can be attributed to the following three characteristics of GNSs as the PANI support: (a) the two-dimensional planar structure is beneficial to homogeneous nucleation of a large amount of PANI on their surface, giving more active sites for the redox reaction; (b) the planar contact between GNSs and PANI is good for constructing a conductive network with a high electron transfer rate and a low resistance and (c) the layer-by-layer stacks of crumpled GNSs and PANI layers prevent the peeling of PANI from the graphene surface. As a consequence the material can tolerate severe volume changes, swelling and shrinkage of PANI, during charge/discharge.
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