Recent advances in high-performance lithium-rich manganese-based materials for solid-state lithium batteries

Abstract

All-solid-state lithium batteries (ASSBs) with high energy density and intrinsic safety have received increasing attention, and their performance is largely depended on the cathode materials. Lithium-rich manganese-based materials (LRMs) have been regarded as the most promising cathode materials for next-generation lithium-ion batteries due to the high theoretical specific capacity (>250 mAh g-1) and low cost. However, the existing problems, including the irreversible oxygen release, the poor electrochemical reaction kinetics and cycle stability, voltage decay/hysteresis, have seriously impeded their further commercial application. However, the application of LRMs in solid-state batteries has been rarely reviewed. In the paper, we firstly elucidate the crystal structure, the electrochemical reaction mechanism and the origin of the high capacity of LRMs. Secondly, we comprehensively summarize the development of LRMs in the systems of solid-state batteries in recent years, and the interfacial chemical/electrochemical stability between cathode and solid electrolyte is highlighted, which is the main factor determining their performance of ASSBs. Finally, we discuss the challenges and prospects facing for the development of the high-performance solid-state batteries with LRMs cathode. Particularly, we highlight the combination of LRMs with the halide solid electrolytes processing high ionic conductivity as well the lithium/silicon carbon anodes with high specific capacity to construct high-performance solid-state batteries in the future.