In situ atomic-scale imaging of phase boundary migration in FePO(4) microparticles during electrochemical lithiation.
نویسندگان
چکیده
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.
منابع مشابه
In Situ Atomic-Scale Imaging of Phase Boundary Migration in FePO
Orthorhombic Li x FePO 4 (0 ≤ x ≤ 1) system has attracted much attention for its application as a high power cathode material in lithium ion batteries. [ 1 ] Although the performance of this material has been greatly improved by cation doping, surface coating and size reduction, [ 2–4 ] the fundamental phase transformation mechanisms accompanying lithiation/delithiation are still controversial....
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ورودعنوان ژورنال:
- Advanced materials
دوره 25 38 شماره
صفحات -
تاریخ انتشار 2013