Stabilizing the anodic interface for solid-state lithium metal batteries by combining a low-strain lithium/carbon anode with a polymer electrolyte

Abstract

A configuration combining a low-strain 3D lithium–carbon anode with an in situ polymerized solid polymer electrolyte was proposed, which significantly enhances interface stability in solid-state lithium metal batteries under low pressure. This design accommodates lithium volume changes, reduces internal pressure fluctuation from 13.9% to 6.5%, and extends the cycle life over tenfold versus planar electrodes, offering a promising route toward practical solid-state batteries.