Integrating trace Ti-doping and LiYO2-coating to stabilize Ni-rich cathodes for lithium-ion batteries (Open Access)--颗粒学报PARTICUOLOGY

Zheng, H., Wang, Z., Chen, L., Jiang, H., & Li, C. (2023). Integrating trace Ti-doping and LiYO2-coating to stabilize Ni-rich cathodes for lithium-ion batteries. Particuology, 80, 74-80. https://doi.org/10.1016/j.partic.2022.12.003

Integrating trace Ti-doping and LiYO₂-coating to stabilize Ni-rich cathodes for lithium-ion batteries (Open Access)

Hanwen Zheng ^a, Zhihong Wang ^a, Ling Chen ^a *, Hao Jiang ^{a b *}, Chunzhong Li ^{a b}

a Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China
b Key Laboratory for Ultrafine Materials of Ministry of Education, Frontiers Science Center for Materiobiology and Dynamic Chemistry, School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China

10.1016/j.partic.2022.12.003

Volume 80, September 2023, Pages 74-80

Received 10 November 2022, Revised 11 December 2022, Accepted 11 December 2022, Available online 5 January 2023, Version of Record 1 March 2023.

E-mail: chenling@ecust.edu.cn; jianghao@ecust.edu.cn

Highlights

• A facile one-step sintering strategy was used to obtain Ti-doped and LiYO₂ coated Ni-rich layered cathode.

• Ti doping and LiYO₂ coating can stabilize the structure and prevent the electrolyte erosion.

• The as-obtained Ti-NCM83@LYO exhibits superior rate capability and cycling stability.

Abstract

Ni-rich layered cathodes have become the promising candidates for the next-generation high-energy Li-ion batteries due to their high energy density and competitive cost. However, they suffer from rapid capacity fading due to the structural and interfacial instability upon long-term operation. Herein, the Ti-doped and LiYO₂-coated Ni-rich layered cathode has been synthesized via a facile one-step sintering strategy, which significantly restrains the interfacial parasitic side reactions and enhances the structural stability. Specifically, the trace Ti⁴⁺ doping greatly stabilizes the lattice oxygen and alleviates the Li/Ni disorder while the LiYO₂ coating layer can prevent the erosion of the cathode by the electrolyte during cycles. As a result, the Ti-NCM83@LYO delivers a high specific capacity of 135 mAh g⁻¹ even at 10C and there is almost no capacity loss at 1C for 100 cycles. This work provides a simple one-step dual-modification strategy to meet the commercial requirements of Ni-rich cathodes.

Graphical abstract

Keywords

Ni-rich cathodes; Dual modification; Specific energy density; Li-ion batteries

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