Recent developments and challenges of Li-rich Mn-based cathode materials for high-energy lithium-ion batteries. (December 2020)

• Record Type: Journal Article
• Authors: Zheng, Hongfei; Han, Xiao; Guo, Weibin; Lin, Liang; Xie, Qingshui; Liu, Pengfei; He, Wei; Wang, Laisen; Peng, Dong-Liang
• Is Part Of: Materials today energy. Volume 18(2020)
• Publication Date: 2020-12
• Subjects: Li-rich oxide -- Crystal structure -- Reaction mechanism -- Electrochemical performance -- Diffusion kinetics; Energy development -- Periodicals; Energy industries -- Periodicals; Power resources -- Periodicals; Energy policy -- Periodicals; Energy development; Energy industries; Energy policy; Power resources; Electronic journals; Periodicals; 621.042
• DOI: 10.1016/j.mtener.2020.100518
• Languages: English
• ISSNs: 2468-6069

Abstract

Abstract: Li-rich Mn-based layered oxide cathodes (LLOs), delivering high specific capacity of >300 mAh g −1 and maximum energy density of >1000 Wh kg −1, are deemed to be one of the most promising cathode candidates for next-generation lithium-ion batteries over 350 Wh kg −1 at the full cell level. However, the practical application of LLOs is still hindered by two main challenges: microcosmic material drawbacks (structural instability, poor diffusion kinetics, etc.) and thus induced macroscopic decay of electrochemical performance (low initial Coulombic efficiency, fast capacity/voltage decay, etc.). In this review, we summarize the current developments of LLOs in the structure, corresponding reaction mechanisms, and electrochemical performances, discuss the relationship between inherent material drawbacks and external performance decay, as well as summarize the performance degradation mechanisms and addressing strategies to provide guidance and perspectives for future LLOs research. Graphical abstract: Image 1 Highlights: Current advancements in crystal structure, electrochemical redox mechanisms, and electrochemical performance are presented. The complex relationships between inherent material drawbacks and external performance degradation are revealed. Current strategies and possible solutions in the future are summarized.