期刊
ADVANCED MATERIALS INTERFACES
卷 4, 期 3, 页码 -出版社
WILEY
DOI: 10.1002/admi.201600884
关键词
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资金
- National High Technology Research and Development Program (863 Program) [2015AA034701]
- program for Taishan Scholars
- National Natural Science Foundation of China [51302106, 51402123]
Effective design of an electrode material is essential for energy storage and conversion of supercapacitor. Herein, a well-designed architecture of ultrathin and highly crystalline Co3O4 nanosheets (NSs) with a thickness of 2-3 nm are grown in situ on reduced graphene oxide (RGO) via a hydrothermal route and a subsequent calcination process. During synthesis, graphene oxide (GO) affects the growth of precursor. The Co3O4/RGO composites are employed as electrode material of supercapacitor with the aim of achieving the high electrochemical performance. The results indicate that Co3O4/RGO-2 electrode (the mass ratio of CoCl2 to GO is 10: 1) has the best performance with a specific capacitance of 3344.1 F g(-1) at a current density of 1.25 A g(-1), fine rate capability, and retention capacity of 87.9% even after 6000 cycles at 10 A g(-1). Such excellent performance is ascribed to the synergistic effects of ultrathin and highly crystalline Co3O4 NSs and its interacting model with RGO. This ultrathin sheet-sheet architecture will provide a promising for electrochemical fields.
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