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Deep Insight into Electrochemical Kinetics of Cowpea‐Like Li 3 VO 4 @C Nanowires as High‐Rate Anode Materials for Lithium‐Ion Batteries
Author(s) -
Yang Yang,
Zhao Min,
Xiong Jian,
Geng Hongbo,
Zhang Yufei,
Li Cheng Chao,
Zhao Jinbao
Publication year - 2019
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201900870
Subject(s) - anode , electrochemistry , lithium (medication) , materials science , nanowire , kinetics , electrochemical kinetics , ion , chemical engineering , diffusion , electrode , nanotechnology , conductivity , chemistry , thermodynamics , medicine , physics , organic chemistry , quantum mechanics , engineering , endocrinology
Owing to the high theoretical capacity (394 mAh g −1 ) and appropriate lithiation voltage (0.5–1.0 V vs Li + /Li), Li 3 VO 4 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 Li 3 VO 4 @C nanowires through a facile electrospinning method. In this well‐designed structure, Li 3 VO 4 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 Li 3 VO 4 @C nanowires can be maintained at 318.0 mAh g −1 without obvious capacity decay.