Solid‐State Electrolytes for Lithium‐Air Batteries

Abstract Li‐air batteries (LABs) have attracted widespread attention due to their extremely high theoretical capacity and energy density. However, the practical application of liquid‐stateLABs is substantially hindered by safety concerns, including flammability, leakage, and electrolyte decomposition. In comparison, solid‐state electrolytes (SSEs) possess excellent mechanical strength, high safety, good stability, and non‐flammable characteristics, offering a feasible strategy for achieving stable and practical LABs. In this review, we will focus on the development and challenges of solid‐state lithium‐air batteries (SSLABs), providing an overview of various types of SSEs and discussing the interfacial issues within SSLABs along with potential solutions, and finally propose strategies and outlooks for advanced SSLABs. It is expected that this review will provide a systematic understanding and theoretical framework to guide the design of high‐performance SSLABs.