Li-rich layered oxides: Structure, capacity and voltage fading mechanisms and solving strategies (Open Access)--颗粒学报PARTICUOLOGY

Xie, Y., Jin, Y., & Xiang, L. (2022). Li-rich layered oxides: Structure, capacity and voltage fading mechanisms and solving strategies. Particuology, 61, 1-10. https://doi.org/10.1016/j.partic.2021.05.011

Li-rich layered oxides: Structure, capacity and voltage fading mechanisms and solving strategies (Open Access)

Yin Xie ^a, Yongcheng Jin ^{b c *}, Lan Xiang ^a *

a Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
b School of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China
c Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China

10.1016/j.partic.2021.05.011

Volume 61, February 2022, Pages 1-10

Received 30 November 2020, Revised 16 May 2021, Accepted 30 May 2021, Available online 22 June 2021, Version of Record 20 September 2021.

E-mail: jinyc@qibebt.ac.cn; xianglan@mail.tsinghua.edu.cn

Highlights

• The structure and performances of Li-rich layered oxides are introduced.

• Mechanisms of oxygen loss, capacity fading and voltage fading are reviewed.

• Strategies to mitigate capacity and voltage fading are summarized.

Abstract

Lithium rich layered oxides (LLOs) are attractive cathode materials for Li-ion batteries owing to their high capacity (>250 mA h g^–1) and suitable voltage (∼3.6 V). However, they suffer from serious voltage and capacity fading, which is focused in this review. First, an overview of crystal structure, band structure and electrochemical performances of LLOs is provided. After that, current understanding on oxygen loss, capacity fading and voltage fading is summarized. Finally, five strategies to mitigate capacity and voltage fading are reviewed. It is believed that these understandings can help solve the fading problems of LLOs.

Graphical abstract

Keywords

Lithium rich layered oxides; Redox mechanisms; Capacity fading; Voltage fading; Solving strategies

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