Mesoscale phase distribution in single particles of LiFePO₄ following lithium deintercalation.

ABSTRACT: The chemical phase distribution in hydrothermally grown micrometric single crystals LiFePO₄ following partial chemical delithiation was investigated. Full field and scanning X-ray microscopy were combined with X-ray absorption spectroscopy at the Fe K- and O K-edges, respectively, to produce maps with high chemical and spatial resolution. The resulting information was compared to morphological insight into the mechanics of the transformation by scanning transmission electron microscopy. This study revealed the interplay at the mesocale between microstructure and phase distribution during the redox process, as morphological defects were found to kinetically determine the progress of the reaction. Lithium deintercalation was also found to induce severe mechanical damage in the cry

SUBMITTER: Boesenberg U 

PROVIDER: S-EPMC3670807 | biostudies-literature | 2013 May

REPOSITORIES: biostudies-literature