4.7 Article

Structural elucidation of the degradation mechanism of nickel-rich layered cathodes during high-voltage cycling

Journal

CHEMICAL COMMUNICATIONS
Volume 56, Issue 36, Pages 4886-4889

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/D0CC00327A

Keywords

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Funding

  1. National Natural Science Foundation of China [21805198, 21878195, 21805018]
  2. Youth Foundation of Sichuan University [2017SCU04a08]
  3. National Key Research and Development of China [2016YFD0200404]
  4. Research Foundation for the Postdoctoral Program of Sichuan University [2017SCU12018, 2018SCU12045]
  5. Helmholtz - OCPC Postdoc-Program

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Phase transition occurring during cycling plays a fundamentally important role in the cycling performance of nickel-rich cathodes. Here, splitting of two O3 phases, rather than the often observed O1 phases in the conventional LiCoO2 electrode, was discovered in LiNi0.85Co0.10Mn0.05O2 at a high-voltage region (>4.6 V). Such degradation could be mitigated via Al doping.

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