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Holey two-dimensional transition metal oxide nanosheets for efficient energy storage

Author

Listed:
  • Lele Peng

    (The University of Texas at Austin)

  • Pan Xiong

    (The University of Texas at Austin)

  • Lu Ma

    (Argonne National Laboratory)

  • Yifei Yuan

    (Argonne National Laboratory)

  • Yue Zhu

    (The University of Texas at Austin)

  • Dahong Chen

    (The University of Texas at Austin)

  • Xiangyi Luo

    (Argonne National Laboratory)

  • Jun Lu

    (Argonne National Laboratory)

  • Khalil Amine

    (Argonne National Laboratory)

  • Guihua Yu

    (The University of Texas at Austin)

Abstract

Transition metal oxide nanomaterials are promising electrodes for alkali-ion batteries owing to their distinct reaction mechanism, abundant active sites and shortened ion diffusion distance. However, detailed conversion reaction processes in terms of the oxidation state evolution and chemical/mechanical stability of the electrodes are still poorly understood. Herein we explore a general synthetic strategy for versatile synthesis of various holey transition metal oxide nanosheets with adjustable hole sizes that enable greatly enhanced alkali-ion storage properties. We employ in-situ transmission electron microscopy and operando X-ray absorption structures to study the mechanical properties, morphology evolution and oxidation state changes during electrochemical processes. We find that these holey oxide nanosheets exhibit strong mechanical stability inherited from graphene oxide, displaying minimal structural changes during lithiation/delithiation processes. These holey oxide nanosheets represent a promising material platform for in-situ probing the electrochemical processes, and could open up opportunities in many energy storage and conversion systems.

Suggested Citation

  • Lele Peng & Pan Xiong & Lu Ma & Yifei Yuan & Yue Zhu & Dahong Chen & Xiangyi Luo & Jun Lu & Khalil Amine & Guihua Yu, 2017. "Holey two-dimensional transition metal oxide nanosheets for efficient energy storage," Nature Communications, Nature, vol. 8(1), pages 1-10, April.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_ncomms15139
    DOI: 10.1038/ncomms15139
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