Huang Qiqiang, Liu Jinquan, Chen Xinman, Zhang Peng, Lu Languang, Ren Dongsheng, Ouyang Minggao, Liu Xiang
School of Electronic Science and Engineering (School of Microelectronics), South China Normal University, Foshan, 528225, P. R. China.
School of Materials Science and Engineering, Beihang University, Beijing, 100191, P. R. China.
Adv Mater. 2025 Feb;37(5):e2410006. doi: 10.1002/adma.202410006. Epub 2024 Dec 17.
Li-rich Mn-based (LRM) cathode materials, characterized by their high specific capacity (>250 mAh g¹) and cost-effectiveness, represent promising candidates for next-generation lithium-ion batteries. However, their commercial application is hindered by rapid capacity degradation and voltage fading, which can be attributed to transition metal migration, lattice oxygen release, and the toxicity of Mn ions to the anode solid electrolyte interphase (SEI). Recently, the application of LRM cathode in all-solid-state batteries (ASSBs) has garnered significant interest, as this approach eliminates the liquid electrolyte, thereby suppressing transition metal crosstalk and solid-liquid interfacial side reactions. This review first examines the historical development, crystal structure, and mechanisms underlying the high capacity of LRM cathode materials. It then introduces the current challenges facing LRM cathode and the associated degradation mechanisms and proposes solutions to these issues. Additionally, it summarizes recent research on LRM materials in ASSBs and suggests strategies for improvement. Finally, the review discusses future research directions for LRM cathode materials, including optimized material design, bulk doping, surface coating, developing novel solid electrolytes, and interface engineering. This review aims to provide further insights and new perspectives on applying LRM cathode materials in ASSBs.
富锂锰基（LRM）正极材料具有高比容量（>250 mAh g⁻¹）和成本效益高的特点，是下一代锂离子电池的有前途的候选材料。然而，它们的商业应用受到容量快速衰减和电压衰减的阻碍，这可归因于过渡金属迁移、晶格氧释放以及锰离子对阳极固体电解质界面（SEI）的毒性。最近，LRM正极在全固态电池（ASSB）中的应用引起了极大的兴趣，因为这种方法消除了液体电解质，从而抑制了过渡金属串扰和固液界面副反应。本文综述首先考察了LRM正极材料的历史发展、晶体结构和高容量背后的机制。然后介绍了LRM正极目前面临的挑战以及相关的降解机制，并提出了解决这些问题的方案。此外，还总结了最近关于ASSB中LRM材料的研究，并提出了改进策略。最后，综述讨论了LRM正极材料未来的研究方向，包括优化材料设计、体相掺杂、表面涂层、开发新型固体电解质和界面工程。本综述旨在为在ASSB中应用LRM正极材料提供进一步的见解和新的视角。
