正极改性对锂电池安全与能量密度的影响

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中图分类号：U463.633 文献标识码：A 文章编号：1003-8639（2025）09-0046-03

TheInfluenceof CathodeModification on the Safetyand EnergyDensityofLithium Batterie

（GeelyAutomobile Research Institute Ningbo Co.，Ltd.，Ningbo 315Ooo， China）

【Abstract】There are risks of thermal runaway and interfacial side reactions in high specific energy lithiumionbateriesunder highvoltageoperation，whichafectthesystemsafetyandcyclestability.Thispapersystematically studiesthe types and mechanisms of action of surface modification technologies for cathode materials，analyzes the regulatory efectsof modification methods onthe thermal stability，structural integrityand side reaction behaviorof materials，and further explores the influencelawsof diferentsurface modification strategies onthe initial capacity，rate performanceand long-term capacity retentionrate.Theresearchhas clarifiedthecore roleofsurface structure regulation inenhancing thermal managementperformanceand energyrelease eficiency，providing theoreticalsupportandtechnical paths for the material engineering optimizationof high-safetyandhigh-energy-densitylithium-ionbaterysystems.

【Key words】lithium-ionbatery；cathode material;surface modification；thermal stability；energy density

0 引言

在高电压区间运行时，高比能正极材料易发生界面副反应并出现热稳定性劣化，导致容量衰减加剧和热失控风险提升，严重制约锂电池在高安全－高能量密度场景中的实际应用。（剩余4424字）