Journal
FRONTIERS IN CHEMISTRY
Volume 6, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fchem.2018.00195
Keywords
potassium vanadate; electrospinning; fork-like nanostructure; cathode materials; lithium-ion batteries
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Funding
- Natural Science Foundation of Hunan Province, China [2018JJ1036]
- Innovation-driven Program of Central South University [2017CX001]
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Single crystalline fork-like potassiumvanadate (K2V8O21) has been successfully prepared by electrospinning method with a subsequent annealing process. The as-obtained K2V8O21 forks show a unique layer-by-layer stacked structure. When used as cathode materials for lithium-ion batteries, the as-prepared fork-like materials exhibit high specific discharge capacity and excellent cyclic stability. High specific discharge capacities of 200.2 and 131.5 mA h g(-1) can be delivered at the current densities of 50 and 500 mA g(-1), respectively. Furthermore, the K2V8O21 electrode exhibits excellent long-term cycling stability which maintains a capacity of 108.3 mA h g(-1) after 300 cycles at 500 mA g(-1) with a fading rate of only 0.043% per cycle. The results demonstrate their potential applications in next-generation high-performance lithium-ion batteries.
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