文献类型：期刊文献

英文题名：Impact of localized compression on lithium plating and capacity degradation in lithium-ion pouch cells

作者：Gao, Yan[1];Chen, Ying[1];Du, Yingyue[1];Chen, Haofeng[1,2];Luan, Weiling[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, CPCIF Key Lab Adv Battery Syst & Safety, Shanghai, Peoples R China;[2]Univ Strathclyde, Dept Mech & Aerosp Engn, Glasgow G1 1XJ, Scotland

年份：2025

卷号：652

外文期刊名：JOURNAL OF POWER SOURCES

收录：;EI(收录号：20252418607157);WOS:【SCI-EXPANDED(收录号:WOS:001513425400005)】；

基金：This work was supported by the National Natural Science Foundation of China (52375144 and 52205153) , Shanghai Pujiang Programme (23PJD019) and "the Fundamental Research Funds for the Central Universities" (JKG01251734) .

语种：英文

外文关键词：Lithium-ion pouch cells; Localized compression; Lithium plating; Capacity degradation; Electrochemical aging

摘要：Localized mechanical compression within lithium-ion battery packs, often resulting from cell swelling or module-level stacking misalignment, poses significant risks to long-term safety and performance. This study investigates 3C cycling under 6 MPa localized compression using a custom mechanical loading platform. Results show localized compression induces stress concentration and uneven lithium-ion transport, promoting lithium plating. Capacity degradation follows a three-stage process: slow, accelerated, and stabilized fade, while lithium plating evolves through nucleation, expansion, and stabilization. Post-mortem analyses reveal separator pore closure and stress-induced transport restrictions exacerbate lithium plating. Additionally, pressure fluctuations intensify with lithium deposition due to electrode material phase changes, suggesting pressure signals as potential aging indicators. These findings provide insights into the design of mechanically robust battery modules, helping to mitigate localized compression-induced degradation and improve battery safety.