船电技术2023，Vol.43Issue(12)：67-70,4.
镧掺杂包覆改性高压4.6V钴酸锂
Lanthanum-doped coating modified high-voltage 4.6 V lithium cobalt oxide
李震睿 1王瑾 1陶锴 1王灿 1朱佩佩1
作者信息
- 1. 武汉船用电力推进装置研究所,武汉 430064
- 折叠
摘要
Abstract
Among the widely studied cathode materials,LiCoO2(LCO)still dominates in portable electronics.Although its theoretical capacity～274 mAhg-1 can't be achieved in lithium-ion batteries,it can achieve a specific capacity of～240 mAhg-1 by increasing the charge voltage to 4.6V.LCO at high voltage faces the problems ofmaterial surface structure instability,lattice oxygen output and other issues in the electrochemical reaction.This paper investigatesthe effect of lanthanum-doped coating on the high-voltage 4.6V LCO.The results show that the positive electrode of La-LCOcan inhibit the degradation of the electrode surface structure,significantly improve the electrochemical performance and greatly enhancethe high-voltage cycle stability.For half-cell 4.6V,capacity retention rate is 88％of 1C after 200 cycles and for LCO/graphite full cell,it is still 89％of 1C after 100 cycles.关键词
钴酸锂/高电压/包覆/掺杂Key words
LCO/high voltage/coating/doping分类
信息技术与安全科学引用本文复制引用
李震睿,王瑾,陶锴,王灿,朱佩佩..镧掺杂包覆改性高压4.6V钴酸锂[J].船电技术,2023,43(12):67-70,4.
