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Facile Generation of Polymer-Alloy Hybrid Layer towards Dendrite-free Lithium Metal Anode with Improved Moisture Stability.

Lithium (Li) metal anode is recognized as the most promising next-generation anode material for high-energy storage batteries. However, the lithium dendrites lead to irreversible capacity decay in lithium metal batteries (LMBs). Besides, strict assembly environment conditions of LMBs is regarded as a challenge for practical applications. Herein, a workable lithium metal anode with an artificial hybrid layer composed of polymer and alloy is designed and prepared by a simple chemical modification strategy. Treated lithium anode exhibits dendrite-free over 1000 h in the Li-Li symmetric cell and outstanding cycle performance in high areal loading Li-S and Li-LiFePO4 full cells. Moreover, the treated lithium shows improved moisture stability that benefits from the hydrophobicity of the polymer, retaining good electrochemical performances after humid air exposure.