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In situ inorganic conductive network formation in high-voltage single-crystal Ni-rich cathodes

Author

Listed:
  • Xinming Fan

    (Central South University)

  • Xing Ou

    (Central South University)

  • Wengao Zhao

    (Empa, Swiss Federal Laboratories for Materials Science and Technology
    Xiamen University, Xiamen)

  • Yun Liu

    (Central South University)

  • Bao Zhang

    (Central South University)

  • Jiafeng Zhang

    (Central South University)

  • Lianfeng Zou

    (Pacific Northwest National Laboratory)

  • Lukas Seidl

    (Empa, Swiss Federal Laboratories for Materials Science and Technology)

  • Yangzhong Li

    (National Supercomputing Center in Shenzhen, Shenzhen)

  • Guorong Hu

    (Central South University)

  • Corsin Battaglia

    (Empa, Swiss Federal Laboratories for Materials Science and Technology)

  • Yong Yang

    (Xiamen University, Xiamen)

Abstract

High nickel content in LiNixCoyMnzO2 (NCM, x ≥ 0.8, x + y + z = 1) layered cathode material allows high specific energy density in lithium-ion batteries (LIBs). However, Ni-rich NCM cathodes suffer from performance degradation, mechanical and structural instability upon prolonged cell cycling. Although the use of single-crystal Ni-rich NCM can mitigate these drawbacks, the ion-diffusion in large single-crystal particles hamper its rate capability. Herein, we report a strategy to construct an in situ Li1.4Y0.4Ti1.6(PO4)3 (LYTP) ion/electron conductive network which interconnects single-crystal LiNi0.88Co0.09Mn0.03O2 (SC-NCM88) particles. The LYTP network facilitates the lithium-ion transport between SC-NCM88 particles, mitigates mechanical instability and prevents detrimental crystalline phase transformation. When used in combination with a Li metal anode, the LYTP-containing SC-NCM88-based cathode enables a coin cell capacity of 130 mAh g−1 after 500 cycles at 5 C rate in the 2.75-4.4 V range at 25 °C. Tests in Li-ion pouch cell configuration (i.e., graphite used as negative electrode active material) demonstrate capacity retention of 85% after 1000 cycles at 0.5 C in the 2.75-4.4 V range at 25 °C for the LYTP-containing SC-NCM88-based positive electrode.

Suggested Citation

  • Xinming Fan & Xing Ou & Wengao Zhao & Yun Liu & Bao Zhang & Jiafeng Zhang & Lianfeng Zou & Lukas Seidl & Yangzhong Li & Guorong Hu & Corsin Battaglia & Yong Yang, 2021. "In situ inorganic conductive network formation in high-voltage single-crystal Ni-rich cathodes," Nature Communications, Nature, vol. 12(1), pages 1-13, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-25611-6
    DOI: 10.1038/s41467-021-25611-6
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    Cited by:

    1. Xing Ou & Tongchao Liu & Wentao Zhong & Xinming Fan & Xueyi Guo & Xiaojing Huang & Liang Cao & Junhua Hu & Bao Zhang & Yong S. Chu & Guorong Hu & Zhang Lin & Mouad Dahbi & Jones Alami & Khalil Amine &, 2022. "Enabling high energy lithium metal batteries via single-crystal Ni-rich cathode material co-doping strategy," Nature Communications, Nature, vol. 13(1), pages 1-12, December.

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