储能科学与技术2026，Vol.15Issue(9)：3489-3496,8.DOI:10.19799/j.cnki.2095-4239.2026.0391
FEC添加剂提升预锂化石墨负极的循环稳定性
Enhanced cycling stability of prelithiated graphite anodes by FEC additive
孙文轩 1李伟善 2刘钰昭 1董鹏远 1吕少茵 1陈柱 1邓啟熙 1李明飞 1饶睦敏 1廖友好2
作者信息
- 1. 广东能源集团科学技术研究院有限公司,广东 广州 510000
- 2. 华南师范大学化学学院,广东 广州 510006
- 折叠
摘要
Abstract
The energy density and cycling stability of commercial graphite anode-based lithium-ion batteries(LIBs)still have considerable potential for improvement.Prelithiation of graphite and the incorporation of electrolyte additives to enhance interfacial stability are among the most effective strategies for overcoming the performance limitations of graphite-based LIBs.Herein,fluoroethylene carbonate(FEC)is employed as a film-forming electrolyte additive to improve the electrochemical performance of prelithiated graphite anodes by modulating interfacial kinetics.The prelithiated graphite/Li half-cell utilizing the baseline electrolyte retains 43.0％of its capacity after 300 cycles at a rate of 0.2 C,compared with only 27.9％for the non-prelithiated counterpart.Upon the addition of 1％FEC,the battery demonstrates negligible capacity decay after 600 cycles.Furthermore,when the operating temperature is reduced from 25℃to 0℃,the capacity loss of the battery decreases from 39.5％without FEC to 15.7％with FEC.In graphite||LiFePO4 full cells,the capacity retention of the non-prelithiated graphite increases from 71.6％to 73.7％after 200 cycles at 0.5 C with the addition of FEC,whereas that of the prelithiated graphite electrode rises from 94.2％to 97.1％.These experimental results confirm that the synergistic effect of graphite prelithiation and the FEC additive significantly enhances the cycling stability of the battery.Therefore,FEC induces the formation of a high-quality solid electrolyte interphase on the surface of the prelithiated anode,improving the electrochemical performance of graphite-based LIBs under ambient and low-temperature conditions.This strategy provides a practical approach and theoretical basis for the development of high-energy-density LIBs capable of operating reliably in extreme environments.关键词
锂离子电池/预锂化石墨/氟代碳酸乙烯酯/成膜添加剂/固体电解质界面膜Key words
lithium-ion battery/pre-lithiated graphite/fluorinated ethylene carbonate/film-forming additive/solid electrolyte interphase film分类
信息技术与安全科学引用本文复制引用
孙文轩,李伟善,刘钰昭,董鹏远,吕少茵,陈柱,邓啟熙,李明飞,饶睦敏,廖友好..FEC添加剂提升预锂化石墨负极的循环稳定性[J].储能科学与技术,2026,15(9):3489-3496,8.
