储能科学与技术2025，Vol.14Issue(9)：3279-3289,11.DOI:10.19799/j.cnki.2095-4239.2025.0119
双功能电解液添加剂对钴酸锂高电压锂离子电池性能的影响
The effect of bifunctional electrolyte additive(cyanomethyl p-toluenesulfonate)on the performance of lithium cobalt oxide high-voltage lithium-ion batteries
潘立宁 1汪海滨 1方翔 1施萍灏 1谭飞 1赵俊华2
作者信息
- 1. 新亚杉杉新材料科技(衢州)有限公司
- 2. 衢州学院,浙江 衢州 324000
- 折叠
摘要
Abstract
Lithium cobalt oxide(LCO)offers advantages such as long cycle life,high energy density,and no memory effect,making it widely used in wearable digital products.Increasing the charging cut-off voltage can effectively enhance the battery's energy density;however,it also induces adverse effects,including electrolyte oxidation and decomposition and cobalt ion dissolution,resulting in performance degradation.In this study,a bifunctional additive,cyanomethyl p-toluenesulfonate(CMPTS),was introduced to improve battery performance.CMPTS participates in the formation of the solid electrolyte interphase(SEI)on the anode and the cathode electrolyte interphase(CEI)on the cathode,suppressing further redox reactions of carbonate solvents and lithium hexafluorophosphate(LiPF6),and preventing cobalt ion dissolution from LCO.This promotes the insertion and extraction of lithium ions(Li+)through the solid passivation film.Using CMPTS as an electrolyte additive in AG/LCO full cells,charge-discharge tests were conducted at 0.5 C within 3.0-4.55 V.The cell containing 1%CMPTS exhibited a capacity retention of 90.4%after 500 cycles at room temperature,compared to 80.8%for the baseline cell.At 45℃,after 350 cycles,the capacity retention rates of the CMPTS-containing and baseline cells were 83.2%and 78.1%,respectively.These results demonstrate that CMPTS significantly enhances the electrochemical performance of lithium-ion batteries.关键词
钴酸锂/电解液添加剂/高电压Key words
lithium cobalt oxide/electrolyte additive/high voltage分类
信息技术与安全科学引用本文复制引用
潘立宁,汪海滨,方翔,施萍灏,谭飞,赵俊华..双功能电解液添加剂对钴酸锂高电压锂离子电池性能的影响[J].储能科学与技术,2025,14(9):3279-3289,11.
