期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 1, 期 36, 页码 10814-10820出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3ta12066j
关键词
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资金
- Startup Foundation of China Academy of Engineering Physics, Institute of Chemical Materials [KJCX201301]
A simple solvothermal method was used to prepare self-assembled V2O5 nanosheets/reduced graphene oxide (RGO) hierarchical nanocomposite. In this nanocomposite, the V2O5 nanosheets assembling on the RGO constitute a 3-D hierarchical nanostructure with high specific surface area and good electronic/ionic conducting path. When used as the cathode materials, the V2O5 nanosheets/RGO nanocomposites exhibit highly reversible capacity and good rate capability relative to the bulk material. The V2O5 nanosheets/RGO nanocomposite anode was able to charge/discharge at high current densities of 3000 mA g(-1) (10 C), 6000 mA g(-1) (20 C) and 15 A g(-1) (50 C), with discharge capacities of approximately 138, 112 and 76 mA h g(-1), respectively. Meanwhile, a discharge capacity of 102 mA h g(-1) can be delivered after 160 cycles at 2 C, showing a good cycling stability. The improved performance could be attributed to the enhanced electron transport and Li+ diffusion that results from the hierarchical nanostructure of V2O5 nanosheets/RGO nanocomposites.
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