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

Yujie Zhu; Jiang Wei Wang; Yang Liu; Xiaohua Liu; Akihiro Kushima; Yihang Liu; Yunhua Xu; Scott X Mao; Ju Li; Chunsheng Wang; Jian Yu Huang

doi:10.1002/adma.201301374

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

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

Authors

Yujie Zhu¹, Jiang Wei Wang, Yang Liu, Xiaohua Liu, Akihiro Kushima, Yihang Liu, Yunhua Xu, Scott X Mao, Ju Li, Chunsheng Wang, Jian Yu Huang

Affiliation

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

PMID: 23873760
DOI: 10.1002/adma.201301374

Abstract

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.

Keywords: LiFePO4; Lithium; batteries; imaging; in situ TEM; microparticles.

Publication types

Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

Electrochemistry
Ferric Compounds / chemistry*
Iron / chemistry
Lithium / chemistry
Microscopy, Electron, Transmission*
Microspheres*
Phosphates / chemistry*

Substances

Ferric Compounds
LiFePO4
Phosphates
Lithium
Iron
ferric phosphate