Self‐Induced Dual‐Layered Solid Electrolyte Interphase with High Toughness and High Ionic Conductivity for Ultra‐Stable Lithium Metal Batteries

Abstract

Lithium (Li) metal is considered as one of the most promising candidates of anode material for high‐specific‐energy batteries, while irreversible chemical reactions always occur on the Li surface to continuously consume active Li, electrolyte. Solid electrolyte interphase (SEI) layer has been regarded as the key component in protecting Li metal anode. Herein, we construct a controllable dual‐layered SEI for Li metal anode in a scalable, low‐lost manner. The SEI is self‐induced by the pre‐deposited LiAlO2 (LAO) layer during the initial cycles, in which the outer organic layer is produced due to the electrons tunnelling through LAO, resulting in the reduction of electrolyte. The robust inner LAO layer can promote uniform Li deposition owing to its favorable mechanical strength, ionic conductivity, the outer organic layer can further improve the stability of SEI. Benefiting from the remarkable effects of this dual‐layered SEI, enhanced electrochemical performance of LAO‐Li anode is achieved. Additionally, a large‐size LAO‐Li sample can be easily obtained, the preparation of the modified Li metal anode shows huge potential for large‐scale production. This work highlights the tremendous potential of this self‐induced dual‐layered SEI for the commercialization of Li metal anode.This article is protected by copyright. All rights reserved