电源技术2026，Vol.50Issue(4)：621-628,8.DOI:10.3969/j.issn.1002-087X.2026.04.05
LiFSI/LiPF6混盐电解液对高镍/硅碳电池性能的影响
Effect of LiFSI/LiPF₆ mixed salt electrolyte on high-nickel/silicon-carbon battery performance
王丽明 1崔正元 1孙晓宾 1刘航辰1
作者信息
- 1. 中航锂电(洛阳)有限公司,河南 洛阳 471000
- 折叠
摘要
Abstract
To investigate the mechanism of action of mixed salt systems on the performance of high-nickel/silicon-carbon batteries,lithium bis(fluorosulfonyl)imide(LiFSI)was used as the main salt,and lithium hexafluorophosphate(LiPF6)as the auxiliary salt to inhibit aluminum foil corrosion.The physicochemical properties of electrolytes with different LiFSI/LiPF₆ ratios,as well as their effects on the rate capability and high-temperature(55℃)cycling stability of the batteries,were systematically studied.Aluminum foil corrosion characterization indicates that the introduction of LiPF₆ can effec-tively suppress aluminum foil corrosion,while cyclic voltammetry(CV)tests reveal a positive correla-tion between the degree of aluminum foil corrosion and LiFSI content.Electrochemical test results demonstrate that the optimized mixed salt ratio can synergistically enhance the rate capability and high-temperature cycling stability of the batteries.When the molar ratio of LiPF₆ to LiFSI is 1∶1,the battery exhibits the minimum gas evolution,the best cycling performance,and the lowest internal re-sistance change rate after cycling at 55℃,retaining 80%of its initial capacity after 370 cycles at 0.5 C/0.5 C.Precise regulation of the LiFSI/LiPF6 ratio can significantly mitigate aluminum foil corrosion and capacity fading during high-temperature cycling,providing key experimental basis and technical reference for the electrolyte formulation optimization of high-nickel/silicon-carbon batteries.关键词
高镍/硅碳电池/混盐电解液/铝箔腐蚀/双氟磺酰亚胺锂(LiFSI)/六氟磷酸锂(LiPF6)/高温循环稳定性Key words
high-nickel/silicon-carbon battery/mixed salt electrolyte/aluminum foil corrosion/lithium bis(fluorosulfonyl)imide(LiFSI)/lithium hexafluorophosphate(LiPF6)/high-temperature cy-cling stability分类
信息技术与安全科学引用本文复制引用
王丽明,崔正元,孙晓宾,刘航辰..LiFSI/LiPF6混盐电解液对高镍/硅碳电池性能的影响[J].电源技术,2026,50(4):621-628,8.
