期刊
RSC ADVANCES
卷 2, 期 27, 页码 10268-10274出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ra21292g
关键词
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资金
- National Natural Science Foundation of China (NSFC) [21073092, 21103092]
- DFSR [A2620110010]
- Science and Technology Support Plan of Jiangsu Province, China [BE2011835]
- Excellent Plan Foundation of NUST
- Department of Education of Jiangsu Province
- PAPD
A ternary electrode material, based on graphene, tin oxide (SnO2) and polypyrrole (PPy) was obtained via one-pot synthesis. The graphene/SnO2/PPy (GSP) nanocomposite is composed of a thin conducting film of PPy on the surface of graphene/SnO2 (GS). An enhanced specific capacitance (616 F g(-1)) of GSP was obtained at 1 mV s(-1) in 1 M H2SO4 compared with GS (80.2 F g(-1)) and PPy (523 F g(-1)). The GSP electrode shows better cycle stability and no obvious decay after 1000 galvanostatic cycles at 1 A g(-1). Its specific power density and energy density can reach 9973.26 W kg(-1), and 19.4 W h kg(-1), respectively. The excellent electrochemical performance arises from the well-designed structure advantages, the good combination of components and the synergistic effect between the three components. Well-dispersed graphene is used as a framework for sustaining the pseudocapacitive materials of SnO2 and PPy. The PPy film restricts the aggregation and volume change of SnO2 during charge-discharge cycling, and also enhances the surface area. The electrochemical results show that the ternary composite of GSP is a promising candidate electrode material for high-performance supercapacitors.
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