Electrode strain dynamics in layered intercalation battery cathodes

• 成果类型: Article
• 署名作者: Sun, Tianxiao; Qian, Guannan; Fang, Ruqing; Zan, Guibin; Xue, Zhichen; Trask, Stephen E.; Gutierrez, Arturo; Li, Wenlong; Deng, Shimao; Li, Luxi; Yun, Wenbing; Pianetta, Piero; Yu, Guihua; Croy, Jason R.; Chueh, William C.; Zhu, Juner; Liu, Yijin
• 署名单位: University of Texas System; University of Texas Austin; University of Texas System; University of Texas Austin; Northeastern University; United States Department of Energy (DOE); Stanford University; SLAC National Accelerator Laboratory; United States Department of Energy (DOE); Argonne National Laboratory; United States Department of Energy (DOE); Argonne National Laboratory; Stanford University; United States Department of Energy (DOE); Stanford University; SLAC National Accelerator Laboratory
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8075; 1095-9203
• DOI: 10.1126/science.aea2763
• 发表日期: 2025-12-18
• 页码: 1272-1277
• 关键词: lithium; operando; CHALLENGES; stress; cells; ni

摘要

Rechargeable batteries using electrodes based on intercalation chemistry exhibit notable cyclability, yet their performance still suffers from chemomechanical degradation. In this study, by combining a suite of operando microscopy methods, we explored electrode strain evolution and observed intricate particle cluster rearrangement under electrochemical stimuli. We show that early-stage strain accumulation in intercalation cathodes occurs during the period of interparticle charge transfer and redox reactions stemming from asynchronous coupling and decoupling between chemical (de)intercalation and physical grain motion. This interplay drives heterogeneous redox activity, localized charge equilibration, and multiscale strain cascades that propagate through an asynchronous network of chemical-mechanical interactions. Together, these findings reveal how collective particle dynamics and hierarchical strain transmission dictate electrode deformation and degradation in intercalation cathodes.