In Situ Formation of Dense Polymers as Artificial Protective Layers for Lithium Metal Anodes

Abstract

In order to improve the stability and safety of lithium (Li) metal anodes, an innovative artificial solid electrolyte interface (SEI) film of Li Poly (tert-butyl acrylate-co-ethyl acrylate-co-methacrylic acid) (LiPTBEM) has been designed. This thin and uniformly artificial SEI is stable, which can suppress the continuous side reactions between the electrolyte and Li metal, improve the stability of modified Li metal anodes, and achieve better electrochemical performance. Symmetric batteries with LiPTBEM exhibit significantly improved cycling stability, indicating that LiPTBEM is a promising artificial SEI film.