Interfacial Engineering of Polymer Solid‐State Lithium Battery Electrolytes and Li‐Metal Anode: Current Status and Future Directions

Abstract A combination of material innovations, advanced manufacturing, battery management systems, and regulatory standards is necessary to improve the energy density and safety of lithium (Li) batteries. High‐energy‐density solid‐state Li‐batteries have the potential to revolutionize industries and technologies, making them a research priority. The combination of improved safety and compatibility with high‐capacity electrode materials makes solid‐stateLi‐batteries with polymer solid‐electrolytes an attractive option for applications where energy density and safety are critical. While polymer‐based solid‐state Li‐batteries hold enormous promise, there are still several challenges that must be addressed, particularly regarding interface between polymer solid‐electrolyte and Lianode. There are significant advancements in improving the performance of solid‐state Li batteries, and researchers continue to explore new methods to address these challenges. These improvements are critical for enabling the widespread adoption of solid‐state Li‐batteries invariety of applications, from electrical vehicles to portable electronics. Here, common polymer solid‐electrolyte and its interface challenges with Lianode are first introduced, highlighting the trend in polymer solid‐state‐electrolyte research toward enhancing stability, safety, and performance of solid‐state Li‐batteries. This includes developing novel polymer materials with improved properties, exploring advanced fabrication techniques, and integrating these electrolytes into battery designs that optimize both safety and energy density.