Advancements, Challenges, and Prospects in Rechargeable Solid‐State Lithium‐Air Batteries

Abstract

Solid‐state lithium‐air batteries (SSLABs) are attracting widespread research interests as emerging energy storage systems with ultrahigh theoretical energy density. However, due to their relatively short development history, the practical capacity and cyclic performance of SSLABs still fail to meet application requirements. The selection of solid electrolytes and the design and optimization of air cathodes are key factors for developing high‐performance solid‐state lithium‐air batteries. In this review, we focus on recent scientific advances and challenges in SSLABs, providing a comprehensive overview in the aspects of solid electrolytes, air cathodes, and interface issues. Strategies such as electrolytes, composite cathodes, interface engineering, and the addition of catalysts which have been effective in addressing issues related to low ionic conductivity of electrolytes, high interfacial impedance, sluggish kinetics of electrochemical reactions, and poor cycling stability, were reviewed and discussed. Furthermore, this review also discusses the prospects of SSLABs, aiming to inspire and provide references for the development of solid‐state lithium‐air batteries, as well as other metal‐air batteries.

An Electrochemically Stable Polyester Fabric-reinforced Poly(methyl methacrylate) Gel Polymer Electrolyte for Solid-State Lithium–Oxygen Batteries

“…SPEs made of polymer matrices and lithium salts generally show low ionic conductivities at room temperature. Moreover, the oxygen electrochemical reaction only occurs at the cathode/SPE/oxygen triple-phase interfaces accessible to both electrons and lithium ions. , The limited contacts between SPEs and porous cathodes would thus lead to increased interfacial resistances of solid-state Li–O 2 batteries compared with their counterparts with liquid electrolytes. Both the modification of SPE and the special design of the SPE/cathode interface architecture are mandatorily required to enhance the ionic conductivity of SPE, lower the interface resistance, and ultimately improve the performance of solid-state Li–O 2 batteries.…”