Ma Jun, Zhang Shu, Zheng Yue, Huang Tianpeng, Sun Fu, Dong Shanmu, Cui Guanglei
Qingdao Industrial Energy Storage Research Institute, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao, 266101, China.
Shandong Energy Institute, Qingdao, 266101, China.
Adv Mater. 2023 Sep;35(38):e2301892. doi: 10.1002/adma.202301892. Epub 2023 Jul 13.
Solid-state lithium-metal batteries have been identified as a strategic research direction for the electric vehicle industry because of their promising high energy density and potential characteristic safety. However, the intrinsic mechanical properties of solid materials cause inevitable electro-chemo-mechanical failure of electrodes and electrolytes during charging and discharging; these failure mechanisms include lithium penetration and formation of cracks and voids, which pose a serious challenge for the long cycle life of solid-state lithium-metal batteries. Here, a short overview of the recent advances with a view to understand this challenge is provided. Furthermore, new insights into the cross-talk behavior between the cathode and lithium-metal anode are provided based on the non-uniform Li flux inducing interactional electro-chemo-mechanical failure. Furthermore, guidelines for designing stable solid-state lithium-metal batteries and research directions to figure out the interelectrode-talk-related electro-chemo-mechanical failure mechanism are presented, which can be significant for accelerating the development of solid-state lithium batteries.
固态锂金属电池因其具有高能量密度和潜在的安全特性，已被确定为电动汽车行业的一个战略研究方向。然而，固态材料的固有机械性能会导致电极和电解质在充放电过程中不可避免地发生电化学机械故障；这些故障机制包括锂穿透以及裂纹和空隙的形成，这对固态锂金属电池的长循环寿命构成了严峻挑战。在此，本文对近期进展进行简要概述，以了解这一挑战。此外，基于非均匀锂通量引发的相互作用电化学机械故障，对正极和锂金属负极之间的串扰行为有了新的认识。此外，还提出了设计稳定固态锂金属电池的指导方针以及研究方向，以弄清楚与电极间相互作用相关的电化学机械故障机制，这对于加速固态锂电池的发展具有重要意义。
