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Advanced Materials

In Situ Atomic-Scale Imaging of Phase Boundary Migration in FePO4 Microparticles During Electrochemical Lithiation

Authors

  • Yujie Zhu,

    1. Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, USA
    Current affiliation:
    1. These authors contributed equally to this work.
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  • Jiang Wei Wang,

    1. Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA
    Current affiliation:
    1. These authors contributed equally to this work.
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  • Yang Liu,

    1. Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA
    Current affiliation:
    1. These authors contributed equally to this work.
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  • Xiaohua Liu,

    1. Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA
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  • Akihiro Kushima,

    1. Department of Nuclear Science and Engineering and Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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  • Yihang Liu,

    1. Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, USA
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  • Yunhua Xu,

    1. Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, USA
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  • Scott X. Mao,

    1. Department of Mechanical Engineering and Materials Science, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, USA
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  • Ju Li,

    Corresponding author
    1. Department of Nuclear Science and Engineering and Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
    • Ju Li, Department of Nuclear Science and Engineering and Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

      Chunsheng Wang, Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, USA

      Jian Yu Huang, Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA

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  • Chunsheng Wang,

    Corresponding author
    1. Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, USA
    • Ju Li, Department of Nuclear Science and Engineering and Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

      Chunsheng Wang, Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, USA

      Jian Yu Huang, Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA

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  • Jian Yu Huang

    Corresponding author
    1. Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA
    • Ju Li, Department of Nuclear Science and Engineering and Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.

      Chunsheng Wang, Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, USA

      Jian Yu Huang, Center for Integrated Nanotechnologies, Sandia National Laboratories, Albuquerque, New Mexico 87185, USA

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Abstract

The electrochemical lithiation of FePO4 particles is investigated by in situ high-resolution transmission electron microscopy (HRTEM), and the anisotropic lithiation mechanism is directly observed. For the first time and in contrast to the previous post mortem HRTEM observations, a sharp (010) phase boundary between LiFePO4 and FePO4 is observed, which migrates along the [010] direction during lithiation.

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