储能科学与技术2025，Vol.14Issue(12)：4399-4411,13.DOI:10.19799/j.cnki.2095-4239.2025.0648
硅-石墨复合负极在多物理场视角下的相互作用机制
Interaction mechanisms in silicon-graphite composite anodes from a multiphysics perspective
摘要
Abstract
Silicon-graphite(Si-Gr)composite anodes,which combine the ultrahigh specific capacity of silicon with the structural stability of graphite,are considered key materials for next-generation high-energy-density lithium-ion batteries.However,the substantial volumetric variation of silicon during lithiation/delithiation,coupled with the pronounced differences in physicochemical properties and lithiation mechanisms between Si and graphite,leads to complex internal interactions.These interactions induce multiscale structural failures,including particle pulverization,continuous reconstruction of an unstable solid-electrolyte interphase,and deteriorated ion transport kinetics,severely constraining the commercialization of Si-Gr composite anodes.From a multiphysics perspective,this study systematically reviews the interaction mechanisms within Si-Gr composite anodes.Nonuniform lithiation and the associated accumulation of mechanical stress are identified as the core factors limiting electrode performance.This work provides deep insights into the failure mechanisms of composite electrodes and suggests that future research should shift from passive volume-change accommodation to active regulation of internal stress and the electrochemical environment to achieve long-life,high-energy-density silicon-based anodes.关键词
锂离子电池/石墨负极/硅负极/作用机制/体积膨胀Key words
lithium-ion battery/graphite anode/silicon anode/interaction mechanism/volume expansion分类
信息技术与安全科学引用本文复制引用
WANG Shining,FANG Qiu,LI Yejing,WANG Xuefeng..硅-石墨复合负极在多物理场视角下的相互作用机制[J].储能科学与技术,2025,14(12):4399-4411,13.基金项目
国家重点研发计划(2022YFB2502200),国家自然科学基金项目(52172257),中国博士后科学基金(2023M743739),中国博士后科学基金国家资助博士后研究人员计划(GZC20232939). （2022YFB2502200）
