EXAFS Study on LiFePO4 Powders Produced from Two Sol-Gel Routes

V. S.I. Negara*, C. Latif, W. Wongtepa, S. Pratapa

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)


The local structure of LiFePO4 powders has been investigated using Fe K-edge Extended X-Ray Absorption Fine Structure (EXAFS) Spectroscopy data. The synthesis of LFP powders was carried out using two different sol-gel methods. The raw materials for Fe source were ironstone and commercial precursor of FeCl2•4H2O. Synthesis using natural materials produced two phases, namely LiFePO4 olivine and Li3Fe2(PO4)3 nasicon, whereas that using a commercial product produced a single phase of LiFePO4 olivine. The EXAFS data for both samples were collected at Synchrotron Light Research Institute (SLRI), Thailand. Fitting of the model on the experimental curve provided parameters that can be interpreted as the distance between Fe as the absorber and the nearest atoms on the LFP materials. The EXAFS data analysis has shown that synthesis of LFPs using different Fe sources gives slightly different nearest-neighbor distances, namely Fe-O of 0.21% -0.23%, Fe-P of 0.14% - 0.16%, Fe-Fe of 0.12% for both samples, respectively.

Original languageEnglish
Article number012010
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 9 May 2018
Event2017 International Conference on Theoretical and Applied Physics, ICTAP 2017 - Yogyakarta, Indonesia
Duration: 6 Sept 20178 Sept 2017


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