Fe K-Edge X-ray absorption Near-Edge spectroscopy and morphology analyses of LiFePO4 powders

Fe K-Edge X-ray absorption Near-Edge spectroscopy and morphology analyses of LiFePO4 powders

Two LiFePO4 powders have been synthesized, i.e. using a natural ironstone and a commercial FeCl2·4H2O product as the Fe sources, and their characteristics were compared. The x-ray absorption near-edge spectroscopy (XANES) data, Transmission Electron Microscope (TEM) images and Scanning Electron Micr...

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Bibliographic Details
Published in:Materials today : proceedings Vol. 44; pp. 3361 - 3364
Main Authors: Nihlatunnur, N., Latif, C., Negara, V.S.I., Wongtepa, W., Pratapa, S.
Format: Journal Article
Language:English
Published: Elsevier Ltd 2021
Subjects:
Commercial precursor
Crystallite size
Ironstone
LiFePO4
Morphology
XANES
Ironstone
Commercial precursor
Crystallite size
XANES
LiFePO4
Morphology
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Summary:Two LiFePO4 powders have been synthesized, i.e. using a natural ironstone and a commercial FeCl2·4H2O product as the Fe sources, and their characteristics were compared. The x-ray absorption near-edge spectroscopy (XANES) data, Transmission Electron Microscope (TEM) images and Scanning Electron Microscope (SEM) micrographs were used to examine the value of E0 and the oxidation number, determine the crystallite sizes, and determine their morphology, respectively. Results showed that the ironstone- and commercial-based LFP powders exhibited E0 values of 7120.2 and 7119.6 eV respectively which are both almost equal to FeO and indicates that they have an oxidation number of 2 + as expected. In addition, the crystallite size of the ironstone-based LFP was smaller than that of the commercial one. Moreover, the SEM images showed that the natural LFP was more homogeneous than the commercial LFP.
ISSN:2214-7853
2214-7853
DOI:10.1016/j.matpr.2020.11.648