硅氧-石墨负极锂离子电池化成工艺研究  

Research on Formation Process of Li-ion Battery Containing SiO-Graphite Composite Electrodes

作　　者：李书平 邓孝龙 冀亚娟 Li Shuping;Deng Xiaolong;Ji Yajuan(EVE Energy Co.,Ltd.,Huizhou 516000,China)

机构地区：[1]惠州亿纬锂能股份有限公司,广东惠州516000

出　　处：《广东化工》2025年第6期27-29,共3页Guangdong Chemical Industry

摘　　要：化成工艺是影响SEI膜质量的最重要工序,与电池性能紧密相关。本文在硅氧-石墨负极体系的软包锂离子电池中,基于对石墨和硅氧表面SEI膜形成机理和特点差异、化成参数对SEI膜结构的影响、复配材料储锂动力学和热力学等的综合考量,设计4种化成方案进行实验验证,其中高电压浅循环化成工艺可形成致密度高、柔韧性好、机械强度大、与负极表面结合力强的SEI膜,展现出良好的K值、容量、首效、倍率、高温存储和高温循环性能。The formation process is the most important process that affects the quality of SEI film,and is closely related to battery performance.In this paper,based on the comprehensive consideration of the differences in the formation mechanism and characteristics of SEI film on the surface of graphite and SiO,the influence of formation parameters on the structure of SEI film,and the dynamics and thermodynamics of lithium embedding in composite electrodes,four formation schemes were designed for experimental verification.Among them,the“shallow cycling at high voltage”formation process can form the SEI film with high density,good flexibility,high mechanical strength and strong bonding force with the negative electrode surface,showing good K value,capacity,first Coulomb efficiency,magnification,high temperature storage and high temperature cycling performance.

关 键 词：化成 高电压浅循环 SEI膜 硅氧-石墨负极 

分 类 号：TQ[化学工程]