All-Solid-State Iron-Air Batteries: A Promising High-Temperature Battery Technology for Large-Scale Energy Storage

All-solid-state iron-air batteries (ASSIABs) offer a promising high-temperature battery technology for sustainable large-scale energy storage. However, current ASSIAB performance is insufficient to meet the application requirements, primarily due to the sluggish nature of solid-state electrochemical redox reactions. Here, we briefly describe the development of high-temperature iron-air batteries and conduct an in-depth analysis of ASSIABs, including key materials and the battery reaction mechanisms. We also discuss the current challenges of ASSIABs, suggesting possible strategies to enhance their performance. We hope that this perspective can offer valuable insights into the development of high-performance ASSIABs for large-scale energy storage applications.