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Vol. 16 (2024)

Inhibiting Voltage Decay in Li-Rich Layered Oxide Cathode: From O3-Type to O2-Type Structural Design

https://doi.org/10.1007/s40820-024-01473-7
Guohua Zhang
Institute of New Energy for Vehicles, Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, People’s Republic of China
Xiaohui Wen
Contemporary Amperex Technology Co., Ltd, Ningde 352100, People’s Republic of China
Yuheng Gao
State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, People’s Republic of China
Renyuan Zhang
Institute of New Energy for Vehicles, Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials, School of Materials Science and Engineering, Tongji University, Shanghai 201804, People’s Republic of China
Yunhui Huang
State Key Laboratory of Material Processing and Die and Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, People’s Republic of China

Corresponding Author: Yunhui Huang

huangyh@hust.edu.cn

Nano-Micro Letters, Vol. 16 (2024), Article Number: 260

Abstract

Li-rich layered oxide (LRLO) cathodes have been regarded as promising candidates for next-generation Li-ion batteries due to their exceptionally high energy density, which combines cationic and anionic redox activities. However, continuous voltage decay during cycling remains the primary obstacle for practical applications, which has yet to be fundamentally addressed. It is widely acknowledged that voltage decay originates from the irreversible migration of transition metal ions, which usually further exacerbates structural evolution and aggravates the irreversible oxygen redox reactions. Recently, constructing O2-type structure has been considered one of the most promising approaches for inhibiting voltage decay. In this review, the relationship between voltage decay and structural evolution is systematically elucidated. Strategies to suppress voltage decay are systematically summarized. Additionally, the design of O2-type structure and the corresponding mechanism of suppressing voltage decay are comprehensively discussed. Unfortunately, the reported O2-type LRLO cathodes still exhibit partially disordered structure with extended cycles. Herein, the factors that may cause the irreversible transition metal migrations in O2-type LRLO materials are also explored, while the perspectives and challenges for designing high-performance O2-type LRLO cathodes without voltage decay are proposed.


Highlights:
1 This review systematically compares the different effects of O2-type and O3-type structures on voltage decay for Li-rich layered oxide (LRLO) cathode.
2 The development of O2-type materials and the corresponding mechanisms for addressing voltage decay are comprehensively reviewed.
3 The perspectives and challenges for designing high-performance O2-type LRLO cathodes without voltage decay are proposed.

Keywords

Lithium-ion batteries Li-rich layered oxide Voltage decay Migration of transition metal ions O2-type structural design
Zhang, Guohua, Xiaohui Wen, Yuheng Gao, Renyuan Zhang, and Yunhui Huang. 2024. “Inhibiting Voltage Decay in Li-Rich Layered Oxide Cathode: From O3-Type to O2-Type Structural Design”. Nano-Micro Letters 16 (August):260. https://doi.org/10.1007/s40820-024-01473-7.
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