Atomic-Scale Structure Evolution in a Quasi-Equilibrated Electrochemical Process of Electrode Materials for Rechargeable Batteries

Lin Gu, Dongdong Xiao, Yong Sheng Hu, Hong Li, Yuichi Ikuhara

    Research output: Contribution to journalArticle

    35 Citations (Scopus)

    Abstract

    Lithium-ion batteries have proven to be extremely attractive candidates for applications in portable electronics, electric vehicles, and smart grid in terms of energy density, power density, and service life. Further performance optimization to satisfy ever-increasing demands on energy storage of such applications is highly desired. In most of cases, the kinetics and stability of electrode materials are strongly correlated to the transport and storage behaviors of lithium ions in the lattice of the host. Therefore, information about structural evolution of electrode materials at an atomic scale is always helpful to explain the electrochemical performances of batteries at a macroscale. The annular-bright-field (ABF) imaging in aberration-corrected scanning transmission electron microscopy (STEM) allows simultaneous imaging of light and heavy elements, providing an unprecedented opportunity to probe the nearly equilibrated local structure of electrode materials after electrochemical cycling at atomic resolution. Recent progress toward unraveling the atomic-scale structure of selected electrode materials with different charge and/or discharge state to extend the current understanding of electrochemical reaction mechanism with the ABF and high angle annular dark field STEM imaging is presented here. Future research on the relationship between atomic-level structure evolution and microscopic reaction mechanisms of electrode materials for rechargeable batteries is envisaged.

    Original languageEnglish
    Pages (from-to)2134-2149
    Number of pages16
    JournalAdvanced Materials
    Volume27
    Issue number13
    DOIs
    Publication statusPublished - 2015 Apr 1

    Keywords

    • annular-bright-field imaging
    • atomic-scale structures
    • electrode materials
    • rechargeable batteries
    • scanning transmission electron microscopy

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

    Fingerprint Dive into the research topics of 'Atomic-Scale Structure Evolution in a Quasi-Equilibrated Electrochemical Process of Electrode Materials for Rechargeable Batteries'. Together they form a unique fingerprint.

  • Cite this