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In Situ Atomic‐Scale Imaging of Phase Boundary Migration in FePO 4 Microparticles During Electrochemical Lithiation
Author(s) -
Zhu Yujie,
Wang Jiang Wei,
Liu Yang,
Liu Xiaohua,
Kushima Akihiro,
Liu Yihang,
Xu Yunhua,
Mao Scott X.,
Li Ju,
Wang Chunsheng,
Huang Jian Yu
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201301374
Subject(s) - high resolution transmission electron microscopy , materials science , in situ , electrochemistry , transmission electron microscopy , atomic units , nanoscopic scale , phase (matter) , anisotropy , phase boundary , nanotechnology , optics , electrode , chemistry , physics , organic chemistry , quantum mechanics
The electrochemical lithiation of FePO 4 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 LiFePO 4 and FePO 4 is observed, which migrates along the [010] direction during lithiation.