Deep Insight into Electrochemical Kinetics of Cowpea‐Like Li3VO4@C Nanowires as High‐Rate Anode Materials for Lithium‐Ion Batteries

Abstract

AbstractOwing to the high theoretical capacity (394 mAh g−1) and appropriate lithiation voltage (0.5–1.0 V vs Li+/Li), Li3VO4 is highly regarded as an attractive anode candidate for high‐safety lithium‐ion batteries. However, its high‐rate performance is seriously restricted by the sluggish electrode kinetics. To address these problems, we synthesize cowpea‐like Li3VO4@C nanowires through a facile electrospinning method. In this well‐designed structure, Li3VO4 nanocrystals are uniformly encapsulated in conductive carbon nanofibers just like peas in their pods. The 1D morphology with high electronic conductivity can afford high Li+ ions diffusion rate and fast surface charge storage mechanism, leading to significantly enhanced electrochemical kinetics. Even after 1000 cycles at 2 A g−1, the reversible capacity of cowpea‐like Li3VO4@C nanowires can be maintained at 318.0 mAh g−1 without obvious capacity decay.