Direct imaging of lithium ions using aberration-corrected annular-bright-field scanning transmission electron microscopy and Associated contrast Mechanisms

Xiaoqing He, Lin Gu, Changbao Zhu, Yan Yu, Chilin Li, Yong Sheng Hu, Hong Li, Susumu Tsukimoto, Joachim Maier, Yuichi Ikuhara, Xiaofeng Duan

    Research output: Contribution to journalArticlepeer-review

    16 Citations (Scopus)

    Abstract

    The vast potential and fast development of implementing lithium-based batteries as an alternative power source to replace the existing lowefficiency and environmental-hazardous materials have urged an ever expediting pace for investigation of the corresponding characterization methods, in particular to observe lithium ions at atomic scale. Here we demonstrate a feasible annular-brightfield (ABF) imaging method based on aberrationcorrected scanning transmission electron microscopy to observe lithium ions directly at atomic resolution using LiFePO4, a positive electrode material routinely used, for a case study. In addition, we performed extensive image simulations, including the influences from specimen thickness, high tension, illumination angle, collection angle, material vacancy and lattice distortion, to compare and interpret explicitly the displayed image contrast and the attainable optimum operation conditions.

    Original languageEnglish
    Pages (from-to)43-50
    Number of pages8
    JournalMaterials Express
    Volume1
    Issue number1
    DOIs
    Publication statusPublished - 2011 Mar

    Keywords

    • Aberration-correction
    • Annular-bright-field (ABF)
    • Lithium-ion battery
    • Scanning transmission electron microscopy (STEM)

    ASJC Scopus subject areas

    • Materials Science(all)

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