Reaction Mechanisms of Layered Lithium-Rich Cathode Materials for High-Energy Lithium-Ion Batteries

Layered lithium-rich cathode materials have attracted extensive interest owing to their high theoretical specific capacity (320-350 mA h g(-1)). However, poor cycling stability and sluggish reaction kinetics inhibit their practical applications. After many years of quiescence, interest in layered lithium-rich cathode materials is expected to revive in answer to our increasing dependence on high-energy-density lithium-ion batteries. Herein, we review recent research progress and in-depth descriptions of the structure characterization and reaction mechanisms of layered lithium-rich manganese-based cathode materials. In particular, we comprehensively summarize the proposed reaction mechanisms of both the cationic redox reaction of transition-metal ions and the anionic redox reaction of oxygen species. Finally, we discuss opportunities and challenges facing the future development of lithium-rich cathode materials for next-generation lithium-ion batteries.

Automated summary

Layered lithium-rich cathode materials with high theoretical specific capacity have regained interest due to the increasing reliance on high-energy-density lithium-ion batteries. Research progress on the structure characterization and reaction mechanisms of these materials has been reviewed, focusing on both cationic and anionic redox reactions. The future development of lithium-rich cathode materials for next-generation lithium-ion batteries faces opportunities and challenges.