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Adv Mater. 2013 Oct 11;25(38):5461-6. doi: 10.1002/adma.201301374. Epub 2013 Jul 21.

In situ atomic-scale imaging of phase boundary migration in FePO(4) microparticles during electrochemical lithiation.

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


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.

Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


LiFePO4; Lithium; batteries; imaging; in situ TEM; microparticles

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