文献类型：期刊文献

英文题名：Insights into localized-pressure-driven lithium plating on graphite via operando optics and coupled modeling

作者：Du, Yingyue[1];Yao, Yiming[1];Sun, Min[1];Chen, Ying[1,3];Chen, Haofeng[1,2,3];Luan, Weiling[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Key Lab Adv Battery Syst & Safety CPCIF, Shanghai 200237, Peoples R China;[2]Univ Strathclyde, Dept Mech & Aerosp Engn, Glasgow G1 1XJ, Wales;[3]Shanghai Inst Aircraft Mech & Control, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2026

卷号：154

外文期刊名：JOURNAL OF ENERGY STORAGE

收录：;EI(收录号：20261520479015);WOS:【SCI-EXPANDED(收录号:WOS:001708721600001)】；

基金：The authors gratefully acknowledge the support from the National Natural Science Foundation of China (52375144 and 52205153) , the Shanghai Pujiang Program (23PJD019) and the Shanghai Gaofeng Project for University Academic Program Development.

语种：英文

外文关键词：Lithium plating; Localized pressure; Graphite anode; Digital image correlation (DIC); Electro-chemo-mechanical modeling

摘要：Lithium plating on graphite remains a critical failure pathway for rechargeable cells, yet how non-uniform mechanical loading biases intercalation and triggers plating in real time is not fully resolved. We develop an operando optical platform that combines in-situ microscopy with digital image correlation (DIC) to map deformation while a coupled electro-chemo-mechanical model links stress to both solid-state diffusion and the plating overpotential. Under uniform stack pressure, deposition appears spatially even. In contrast, localized pressure generates stress concentrations that accelerate lithiation near load edges and lithium plating at deformation hotspots. Quantitative image analysis showed that lithiation proceeded much faster in deformation hotspots, where lithium deposition preferentially occurred compared with unpressurized regions. The model reproduces these trends by showing that hydrostatic stress lowers the effective diffusion barrier in graphite and shifts the thermodynamic/electrokinetic balance for lithium deposition, establishing positive feedback between deformation and plating. Together, these results provide a mechanistic bridge from non-uniform pressure to nonuniform plating, and suggest practical strategies to suppress plating heterogeneity and enhance durability and safety during high-rate operation, such as mitigating local pressure and reinforcing coating mechanics.