Reviving the rock-salt phases in Ni-rich layered cathodes by mechano-electrochemistry in all-solid-state batteries

The rock-salt phase (RSP) formed on the surface of Ni-rich layered cathodes in liquid-electrolyte lithium-ion batteries is conceived to be electrochemically "dead". Here we show massive RSP forms in the interior of LiNixMnyCo(1−x-y)O2 (NMC) crystals in sulfide based all solid state batteries (ASSBs), but the RSP remains electrochemically active even after long cycles. The RSP and the layered structure constitute a two-phase mixture, a material architecture that is distinctly different from the RSP in liquid electrolytes. The tensioned layered phase affords an effective percolation channel into which lithium is squeezed out of the RSPs by compressive stress, rendering the RSPs electrochemically active. Consequently, the ASSBs with predominant RSP in the NMC cathode deliver remarkable long cycle life of 4000 cycles at high areal capacity of 4.3 mAh/cm2. Our study unveils distinct mechano-electrochemistry of RSPs in ASSBs that can be harnessed to enable high energy density and durable ASSBs.

© This manuscript version is made available under the CC-BY-NC-ND 4.0 license https://creativecommons.org/licenses/by-nc-nd/4.0/

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Work Title Reviving the rock-salt phases in Ni-rich layered cathodes by mechano-electrochemistry in all-solid-state batteries
Access
Open Access
Creators
  1. Zaifa Wang
  2. Zhenyu Wang
  3. Dingchuan Xue
  4. Jun Zhao
  5. Xuedong Zhang
  6. Lin Geng
  7. Yanshuai Li
  8. Congcong Du
  9. Jingming Yao
  10. Xinyu Liu
  11. Zhaoyu Rong
  12. Baiyu Guo
  13. Ruyue Fang
  14. Yong Su
  15. Claude Delmas
  16. Stephen J. Harris
  17. Marnix Wagemaker
  18. Liqiang Zhang
  19. Yongfu Tang
  20. Sulin Zhang
  21. Lingyun Zhu
  22. Jianyu Huang
Keyword
  1. all-solid-state batteries
  2. Ni-rich cathodes
  3. rock-salt phases
  4. mechano-electrochemistry
License CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives)
Work Type Article
Publisher
  1. Nano Energy
Publication Date November 21, 2022
Publisher Identifier (DOI)
  1. https://doi.org/10.1016/j.nanoen.2022.108016
Deposited August 26, 2024

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Version 1
published

  • Created
  • Added 2023_Nano_Energy-1.pdf
  • Added Creator Zaifa Wang
  • Added Creator Zhenyu Wang
  • Added Creator Dingchuan Xue
  • Added Creator Jun Zhao
  • Added Creator Xuedong Zhang
  • Added Creator Lin Geng
  • Added Creator Yanshuai Li
  • Added Creator Congcong Du
  • Added Creator Jingming Yao
  • Added Creator Xinyu Liu
  • Added Creator Zhaoyu Rong
  • Added Creator Baiyu Guo
  • Added Creator Ruyue Fang
  • Added Creator Yong Su
  • Added Creator Claude Delmas
  • Added Creator Stephen J. Harris
  • Added Creator Marnix Wagemaker
  • Added Creator Liqiang Zhang
  • Added Creator Yongfu Tang
  • Added Creator Sulin Zhang
  • Added Creator Lingyun Zhu
  • Added Creator Jianyu Huang
  • Published
  • Updated
  • Updated Keyword, Publication Date Show Changes
    Keyword
    • all-solid-state batteries, Ni-rich cathodes, rock-salt phases, mechano-electrochemistry
    Publication Date
    • 2023-01-01
    • 2022-11-21