Lithium (Li) metal is a promising anode material for high‐energy density batteries. However, the unstable and static solid electrolyte interphase (SEI) can be destroyed by the dynamic Li plating/stripping behavior on the Li anode surface, leading to side reactions and Li dendrites growth. Herein, we design a smart Li polyacrylic acid (LiPAA) SEI layer high elasticity to address the dynamic Li plating/stripping processes by self‐adapting interface regulation, which is demonstrated by in situ AFM. With the high binding ability and excellent stability of the LiPAA polymer, the smart SEI can significantly reduce the side reactions and improve battery safety markedly. Stable cycling of 700 h is achieved in the LiPAA‐Li/LiPAA‐Li symmetrical cell. The innovative strategy of self‐adapting SEI design is broadly applicable, providing opportunities for use in Li metal anodes

中文翻译：

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用于长寿命锂金属阳极的柔性固体电解质相间层

锂金属是用于高能量密度电池的有希望的负极材料。但是，不稳定和静态的固体电解质中间相（SEI）可以通过在Li阳极表面上动态的Li镀/剥离行为来破坏，从而导致副反应和Li树枝状晶体的生长。本文中，我们设计了一种高弹性的智能锂聚丙烯酸（LiPAA）SEI层，以通过自适应界面调节来解决动态锂电镀/剥离过程，这在原位AFM上得到了证明。凭借LiPAA聚合物的高结合能力和出色的稳定性，智能SEI可以显着减少副反应并显着提高电池安全性。LiPAA-Li / LiPAA-Li对称电池可实现700 h的稳定循环。自适应SEI设计的创新策略广泛适用，