Title |
Electrospun Single Crystalline Fork-Like K2V8O21 as High-Performance Cathode Materials for Lithium-Ion Batteries
|
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Published in |
Frontiers in Chemistry, June 2018
|
DOI | 10.3389/fchem.2018.00195 |
Pubmed ID | |
Authors |
Pengfei Hao, Ting Zhu, Qiong Su, Jiande Lin, Rong Cui, Xinxin Cao, Yaping Wang, Anqiang Pan |
Abstract |
Single crystalline fork-like potassium vanadate (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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