AUTHOR=Hao Pengfei , Zhu Ting , Su Qiong , Lin Jiande , Cui Rong , Cao Xinxin , Wang Yaping , Pan Anqiang 

TITLE=Electrospun Single Crystalline Fork-Like K2V8O21 as High-Performance Cathode Materials for Lithium-Ion Batteries

JOURNAL=Frontiers in Chemistry

VOLUME=6

YEAR=2018

URL=https://www.frontiersin.org/journals/chemistry/articles/10.3389/fchem.2018.00195

DOI=10.3389/fchem.2018.00195

ISSN=2296-2646

ABSTRACT=<p>Single crystalline fork-like potassium vanadate (K<sub>2</sub>V<sub>8</sub>O<sub>21</sub>) has been successfully prepared by electrospinning method with a subsequent annealing process. The as-obtained K<sub>2</sub>V<sub>8</sub>O<sub>21</sub> 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<sup>−1</sup> can be delivered at the current densities of 50 and 500 mA g<sup>−1</sup>, respectively. Furthermore, the K<sub>2</sub>V<sub>8</sub>O<sub>21</sub> electrode exhibits excellent long-term cycling stability which maintains a capacity of 108.3 mA h g<sup>−1</sup> after 300 cycles at 500 mA g<sup>−1</sup> with a fading rate of only 0.043% per cycle. The results demonstrate their potential applications in next-generation high-performance lithium-ion batteries.</p>