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Three‐Dimensional Morphology of Iron Phosphide Phases in a Polycrystalline LiFePO 4 Matrix
Author(s) -
Chung SungYoon,
Kim JinGyu,
Kim YoungMin,
Lee YoungBu
Publication year - 2011
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.201003856
Subject(s) - materials science , crystallite , electron energy loss spectroscopy , scanning transmission electron microscopy , phosphide , transmission electron microscopy , spectroscopy , dark field microscopy , energy dispersive x ray spectroscopy , grain boundary , matrix (chemical analysis) , analytical chemistry (journal) , scanning electron microscope , metal , nanotechnology , microscopy , metallurgy , optics , composite material , microstructure , chemistry , physics , chromatography , quantum mechanics
The three‐dimensionally isolated morphology of secondary iron phosphide phases in a polycrystalline LiFePO 4 matrix is determined using a combination of electron tomography in high‐angle annular dark‐field scanning transmission electron microscopy (HAADF‐STEM), energy‐dispersive X‐ray spectroscopy (EDS), and electron energy‐loss spectroscopy (EELS). The present evidence shows that the enhanced bulk electronic conductivity in LiFePO 4 has no relation to secondary metallic phases at the grain boundaries.