Stabilizing Anodic Interface for Solid-State Lithium Metal Batteries by Combining Low-Strain Lithium/Carbon Anode with Polymer Electrolyte

Abstract

A low-strain 3D lithium-carbon anode combined with in-situ polymerized solid polymer electrolyte 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 cycle life over tenfold versus planar electrodes, offering a promising route toward practical SSLMB applications.