Recent advances in Ni-rich layered oxide particle materials for lithium-ion batteries_中国颗粒学会

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Partic. vol. 53 pp. 1-11 (December 2020)
doi: 10.1016/j.partic.2020.09.004

Recent advances in Ni-rich layered oxide particle materials for lithium-ion batteries

Yong Lu, Yudong Zhang, Qiu Zhang, Fangyi Cheng, Jun Chen*

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chenabc@nankai.edu.cn

Highlights

    • Progress on Ni-rich layered oxide particle materials for lithium-ion batteries. • Structure, redox mechanism and problems of Ni-rich layered oxide particle materials. • Primary particle engineering, surface coating, doping and concentration gradient. • Combination of two or more strategies with synergistic effects in future works.

Abstract

Ni-rich layered oxides with chemical formula of LiNixCoyMnzO2 or LiNixCoyAlzO2 (x + y + z = 1, x ≥ 0.6) have been considered as promising cathode materials for lithium-ion batteries (LIBs) because of their high specific capacity (≥180 mAh g–1) and acceptable manufacture cost. However, the problems associated with high Ni content severely restrict their large-scale applications. In this review, we summarize the recent advances in Ni-rich layered oxide particle materials for LIBs. We begin with the introduction of the structure, redox mechanism, and problems of Ni-rich layered oxides, mainly including residual lithium compounds, gas evolution, rock-salt phase formation, microcrack of particles, dissolution of transition-metal ions, and thermal runaway. Then, four strategies (primary particle engineering, surface coating, doping, concentration gradient design) toward solving the problems of Ni-rich layered oxides will be systematically discussed with the emphasis on structure-performance relationships. To achieve satisfied comprehensive performance and accelerate large-scale applications of Ni-rich layered oxides, the combination of two or more strategies (particle engineering and surface/bulk stabilization techniques) with synergistic effects is necessary in future works. This review would promote further research and application of high-performance Ni-rich layered oxide particle materials for LIBs.

Keywords

Lithium-ion batteries; Cathode materials; Ni-rich layered oxides; Particle materials; Design strategies