Facile <i>ex situ</i> formation of a LiF–polymer composite layer as an artificial SEI layer on Li metal by simple roll-press processing for carbonate electrolyte-based Li metal batteries

Abstract

A facile and scalable process for the formation of artificial SEI layer is proposed by roll-press Li metal and fluoropolymer. The layer, composed of lithium fluoride and polymers, plays Li protection for highly stable lithium metal batteries.