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Published in: Rare Metals 2/2024

16-11-2023 | Original Article

Enhanced cycling stability and rate performance of Co-doped and La2O3-coated LiNi0.9Mn0.1O2 toward power battery

Authors: Jia-Qi Peng, Yuan-Yuan Wei, Dong-Ming Liu, Yun Li, Bin Hu, Bin Huang, Jian-Wen Yang, Shun-Hua Xiao, Ren-Heng Wang

Published in: Rare Metals | Issue 2/2024

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Abstract

Ultra-high nickel layered oxide cathode material with high energy density is the most promising material to improve the electrochemical performance of lithium-ion batteries (LIBs). However, the poor structural stability and severe surface/interface side reactions of the material lead to poor rate performance and cyclic stability, which limits its application in practice. In this paper, the dual-modification strategy of Co doping and La2O3 coating is used to meet the above challenges. Co doping can effectively widen layer spacing and reduce Li+/Ni2+ mixing, and La2O3 coating can effectively eliminate the residual alkali on the surface of active material, inhibit the thickening of cathode electrolyte interphase (CEI) film and reduce surface/interface side reactions. Therefore, the modified material (NM90-CL) with excellent electrochemical properties is achieved through the synergistic enhancement of Co doping and La2O3 coating. Its capacity retention rate can reach 77.9% after 200 cycles at 1.0 °C and 75.7% after 200 cycles at 5.0 °C. Its reversible capacity can up to 153.5 mAh·g–1 at 10.0 °C. This dual-modification strategy will provide theoretical guidance and technical support for the synthesis of other high-performance electrode materials.

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Appendix
Available only for authorised users
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Metadata
Title
Enhanced cycling stability and rate performance of Co-doped and La2O3-coated LiNi0.9Mn0.1O2 toward power battery
Authors
Jia-Qi Peng
Yuan-Yuan Wei
Dong-Ming Liu
Yun Li
Bin Hu
Bin Huang
Jian-Wen Yang
Shun-Hua Xiao
Ren-Heng Wang
Publication date
16-11-2023
Publisher
Nonferrous Metals Society of China
Published in
Rare Metals / Issue 2/2024
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI
https://doi.org/10.1007/s12598-023-02470-2

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