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Inhibition of oxygen dimerization by local symmetry tuning in Li-rich layered oxides for improved stability

Author

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  • Fanghua Ning

    (Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials, College of Engineering, Peking University)

  • Biao Li

    (Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials, College of Engineering, Peking University)

  • Jin Song

    (Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials, College of Engineering, Peking University)

  • Yuxuan Zuo

    (Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials, College of Engineering, Peking University)

  • Huaifang Shang

    (Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials, College of Engineering, Peking University)

  • Zimeng Zhao

    (Beijing University of Technology)

  • Zhen Yu

    (National Synchrotron Radiation Laboratory, University of Science and Technology of China)

  • Wangsheng Chu

    (National Synchrotron Radiation Laboratory, University of Science and Technology of China)

  • Kun Zhang

    (Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials, College of Engineering, Peking University)

  • Guang Feng

    (Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials, College of Engineering, Peking University)

  • Xiayan Wang

    (Beijing University of Technology)

  • Dingguo Xia

    (Beijing Key Laboratory of Theory and Technology for Advanced Batteries Materials, College of Engineering, Peking University
    Beijing Innovation Center for Engineering Science and Advanced Technology, Peking University)

Abstract

Li-rich layered oxide cathode materials show high capacities in lithium-ion batteries owing to the contribution of the oxygen redox reaction. However, structural accommodation of this reaction usually results in O–O dimerization, leading to oxygen release and poor electrochemical performance. In this study, we propose a new structural response mechanism inhibiting O–O dimerization for the oxygen redox reaction by tuning the local symmetry around the oxygen ions. Compared with regular Li2RuO3, the structural response of the as-prepared local-symmetry-tuned Li2RuO3 to the oxygen redox reaction involves the telescopic O–Ru–O configuration rather than O–O dimerization, which inhibits oxygen release, enabling significantly enhanced cycling stability and negligible voltage decay. This discovery of the new structural response mechanism for the oxygen redox reaction will provide a new scope for the strategy of enhancing the anionic redox stability, paving unexplored pathways toward further development of high capacity Li-rich layered oxides.

Suggested Citation

  • Fanghua Ning & Biao Li & Jin Song & Yuxuan Zuo & Huaifang Shang & Zimeng Zhao & Zhen Yu & Wangsheng Chu & Kun Zhang & Guang Feng & Xiayan Wang & Dingguo Xia, 2020. "Inhibition of oxygen dimerization by local symmetry tuning in Li-rich layered oxides for improved stability," Nature Communications, Nature, vol. 11(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-18423-7
    DOI: 10.1038/s41467-020-18423-7
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