电池2023，Vol.53Issue(6)：591-595,5.DOI:10.19535/j.1001-1579.2023.06.001
2,3-吡啶二羧酸酐用于高电压锂离子电池电解液
Application of 2,3-pyridinedicarboxylic anhydride in electrolyte of high voltage Li-ion battery
摘要
Abstract
2,3-pyridinedicarboxylic anhydride(PDA)was applied as a functional additive in the electrolyte.The oxidation-reduction window of electrolyte could be expanded,PDA would preferentially form a protective film on the surface of cathode and anode.Adding 2.0%PDA additive to the electrolyte,the thickness swelling rate of the LiCoO2/graphite full battery decreased from 37.0%to 8.4%after 85℃storage for 18 h,the capacity retention increased from 58.3%to 84.9%after cycle 600 times at 1.0 C in 3.0-4.5 V at 45℃.In the 45℃floating charge test,the thickness swelling rate of battery with 2.0%PDA was only 9.7%after 78 d.Too much PDA led to a significant increase in anode impedance and lithium precipitation.It was recommended that the mass fraction of PDA addition should be 1.0%by comprehensively considering the performance at room temperature and high temperature.关键词
电解液/添加剂/高电压/钴酸锂(LiCoO2)/2,3-吡啶二羧酸酐(PDA)/高温性能/锂离子电池Key words
electrolyte/additive/high voltage/lithium cobalt oxide(LiCoO2)/2,3-pyridinedicarboxylic anhydride(PDA)/high temperature performance/Li-ion battery分类
信息技术与安全科学引用本文复制引用
胡大林,李枫,张方畅,卢周广..2,3-吡啶二羧酸酐用于高电压锂离子电池电解液[J].电池,2023,53(6):591-595,5.基金项目
国家自然科学基金(U22A20439),深圳市基础研究重点项目(JCYJ20220818100418040) （U22A20439）
