Recent Progress and Challenges of Li-Rich Mn-Based Cathode Materials for Solid-State Lithium-Ion Batteries

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Li-rich Mn-based (LRM) cathodes offer high specific capacity and cost-effectiveness for next-generation lithium-ion batteries.
• Commercialization is limited by capacity degradation, voltage fading, transition metal migration, oxygen release, and Mn ion toxicity to the solid electrolyte interphase (SEI).

Purpose of the Study:

• To review the development, capacity mechanisms, and challenges of LRM cathode materials.
• To explore the application of LRM cathodes in all-solid-state batteries (ASSBs) and identify improvement strategies.
• To discuss future research directions for LRM cathode materials in ASSBs.

Main Methods:

• Literature review of historical development, crystal structure, and high-capacity mechanisms of LRM materials.
• Analysis of degradation mechanisms and proposed solutions for LRM cathodes.
• Summary of recent advancements in LRM materials for ASSBs.

Main Results:

• LRM cathodes exhibit high potential but face significant degradation issues in conventional lithium-ion batteries.
• Application in ASSBs mitigates issues related to liquid electrolytes, such as transition metal crosstalk and interfacial side reactions.
• Various strategies including material design, doping, coating, solid electrolyte development, and interface engineering are crucial for enhancing LRM performance in ASSBs.

Conclusions:

• ASSBs offer a promising platform to overcome the limitations of LRM cathode materials.
• Further research in material optimization, interface engineering, and novel solid electrolytes is essential for realizing the full potential of LRM cathodes in ASSBs.
• This review provides insights and perspectives for advancing LRM cathode technology in the field of solid-state batteries.