材料科学
压电
阳极
压力(语言学)
锂(药物)
电解质
金属锂
解耦(概率)
电迁移
复合材料
纳米技术
电极
物理化学
工程类
控制工程
内分泌学
哲学
化学
医学
语言学
作者
Chengshuai Chang,Mengtian Zhang,Zhoujie Lao,Xiao Xiao,Gongxun Lu,Haotian Qu,Xian Wu,H. Y. Fu,Guangmin Zhou
标识
DOI:10.1002/adma.202313525
摘要
Unleashing the potential of lithium-metal anodes in practical applications is hindered by the inherent stress-related challenges arising from their limitless volume expansion, leading to mechanical failures such as electrode cracking, solid electrolyte interphase damage, and dendritic growth. Despite the various protective strategies to "combat" stress in lithium-metal anodes, they fail to address the intrinsic issue fundamentally. Here, a unique strategy is proposed that leverages the stress generated during the battery cycling via the piezoelectric effect, transforming to the adaptive built-in electric field to accelerate lithium-ion migration, homogenize the lithium deposition, and alleviate the stress concentration. The mechanism of the piezoelectric effect in modulating electro-chemomechanical field evolution is further validated and decoupled through finite element method simulations. Inspired by this strategy, a high sensitivity, fast responsive, and strength adaptability polymer piezoelectric is used to demonstrate the feasibility and the corresponding protected lithium-metal anode shows cycling stability over 6000 h under a current density of 10 mA cm
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