A Flexible Ceramic/Polymer Hybrid Solid Electrolyte for Solid‐State Lithium Metal Batteries

TLDR

Ceramic/polymer hybrid solid electrolytes combine the advantages of ceramic and polymer electrolytes, yet interface incompatibility limits their performance. The study aims to prepare a flexible ceramic/polymer hybrid solid electrolyte via an in situ coupling reaction. The in situ coupling creates strong chemical bonds between ceramic and polymer, resolving interface incompatibility and enabling rapid ion transport. The resulting membrane exhibits a room‑temperature ionic conductivity of 9.83 × 10⁻⁴ S cm⁻¹, a Li⁺ transference number of 0.68, and demonstrates that the coupling reaction effectively resolves interface compatibility.

Abstract

Ceramic/polymer hybrid solid electrolytes (HSEs) have attracted worldwide attentions because they can overcome defects by combining the advantages of ceramic electrolytes (CEs) and solid polymer electrolytes (SPEs). However, the interface compatibility of CEs and SPEs in HSE limits their full function to a great extent. Herein, a flexible ceramic/polymer HSE is prepared via in situ coupling reaction. Ceramic and polymer are closely combined by strong chemical bonds, thus the problem of interface compatibility is resolved and the ions can transport rapidly by an expressway. The as-prepared membrane demonstrates an ionic conductivity of 9.83 × 10-4 S cm-1 at room temperature and a high Li+ transference numbers of 0.68. This in situ coupling reaction method provides an effective way to resolve the problem of interface compatibility.