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Structural evolution at the oxidative and reductive limits in the first electrochemical cycle of Li1.2Ni0.13Mn0.54Co0.13O2

Author

Listed:
  • Wei Yin

    (Collège de France
    Sorbonne Université)

  • Alexis Grimaud

    (Collège de France
    CNRS FR 3459)

  • Gwenaelle Rousse

    (Collège de France
    Sorbonne Université
    CNRS FR 3459)

  • Artem M. Abakumov

    (Skolkovo Institute of Science and Technology)

  • Anatoliy Senyshyn

    (Technische Universität München)

  • Leiting Zhang

    (Paul Scherrer Institute)

  • Sigita Trabesinger

    (Paul Scherrer Institute)

  • Antonella Iadecola

    (CNRS FR 3459)

  • Dominique Foix

    (Université de Pau et des Pays de l’Adour)

  • Domitille Giaume

    (Institut de Recherche de Chimie Paris)

  • Jean-Marie Tarascon

    (Collège de France
    Sorbonne Université
    CNRS FR 3459)

Abstract

High-energy-density lithium-rich materials are of significant interest for advanced lithium-ion batteries, provided that several roadblocks, such as voltage fade and poor energy efficiency are removed. However, this remains challenging as their functioning mechanisms during first cycle are not fully understood. Here we enlarge the cycling potential window for Li1.2Ni0.13Mn0.54Co0.13O2 electrode, identifying novel structural evolution mechanism involving a structurally-densified single-phase A’ formed under harsh oxidizing conditions throughout the crystallites and not only at the surface, in contrast to previous beliefs. We also recover a majority of first-cycle capacity loss by applying a constant-voltage step on discharge. Using highly reducing conditions we obtain additional capacity via a new low-potential P” phase, which is involved into triggering oxygen redox on charge. Altogether, these results provide deeper insights into the structural-composition evolution of Li1.2Ni0.13Mn0.54Co0.13O2 and will help to find measures to cure voltage fade and improve energy efficiency in this class of material.

Suggested Citation

  • Wei Yin & Alexis Grimaud & Gwenaelle Rousse & Artem M. Abakumov & Anatoliy Senyshyn & Leiting Zhang & Sigita Trabesinger & Antonella Iadecola & Dominique Foix & Domitille Giaume & Jean-Marie Tarascon, 2020. "Structural evolution at the oxidative and reductive limits in the first electrochemical cycle of Li1.2Ni0.13Mn0.54Co0.13O2," Nature Communications, Nature, vol. 11(1), pages 1-11, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-14927-4
    DOI: 10.1038/s41467-020-14927-4
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