Journal
ENERGY & ENVIRONMENTAL SCIENCE
Volume 5, Issue 3, Pages 6173-6179Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ee03215e
Keywords
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Funding
- Major State Basic Research Development Program of China (973 Program) [2010CB227204]
- Hunan Provincial Innovation Foundation for Postgraduate [CX2010B114]
- Graduate Degree Thesis Innovation Foundation of Central South University
- Chinese government
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A novel two-step approach was developed to fabricate well-dispersed Na1.08V3O8 nanosheets, which consist of ultra-thin monolayer sheets with a thickness of ca. 10 nm. The formation mechanism of nanosheets involves the fusion and conversion of nanorods. When used as a cathode material for Li-ion batteries, the nanosheets show superior rate capability, with discharge capacities of ca. 200.0, 131.3, 109.9, 94.2 and 72.5 mA h g(-1) at 0.4, 10, 20, 30 and 50 C, respectively. Excellent cycling stability without considerable capacity loss over 200 cycles is observed at 600 and 1000 mA g(-1). It is believed that the unique nanosheet morphology as well as its intrinsic structural features greatly facilitate the kinetics of Li-ion diffusion and excellent structure stability, thus resulting in superior electrochemical performance.
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