X-ray Absorption Near Edge Structure (XANES) Spectrum Interpretation for LiFePO4-Silicon Doped Cathode Material

Authors

  • Sahara Hamas Intifadhah Universitas Mulawarman
  • Kholis Nurhanafi Departement of Physics, Faculty of Mathematics and Natural Science, Mulawarman University
  • Fahmi Astuti Departement of Physics, Faculty of Science and Analytical Data, Institut Teknologi Sepuluh Nopember
  • Rahmawati Munir Departement of Physics, Faculty of Mathematics and Natural Science, Mulawarman University
  • Dadan Hamdani Departement of Physics, Faculty of Mathematics and Natural Science, Mulawarman University
  • Darminto Darminto Departement of Physics, Faculty of Science and Analytical Data, Institut Teknologi Sepuluh Nopember

DOI:

https://doi.org/10.25077/jfu.12.3.348-354.2023

Keywords:

XANES, Fe K-edge, pre-edge, LCF, peak energy

Abstract

LiFePO4-Silicon doped has been widely developed as a battery cathode material. Due to the doping of silicon atoms, this study aims to determine the peak energy (E0), oxidation state and percentage of component composition for Fe K-edge. The experimental sample used are LFP Si-0%, LFP Si-1%, LFP Si-3% and LFP Si-6%. These samples were characterized using XAS (X-ray Absorption Spectroscopy). XANES spectrum showed the peak energy of Pre-edge area is 7113.08 – 7114.49 eV. The oxidation state of Fe atoms were increased and tend to be Fe3+ than Fe2+. Moreover, Linear Combination Fitting (LCF) used to determine the ratio composition FeO/Fe2O3 in experimental samples. The ratio composition indicated Fe atom is multivalent, when the percentage of silicon-doped increases, the ratio of Fe3+ increased.It has been found that the presence of silicon atoms in the LiFePO4 structure has an effect in electronic structure.

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Published

2023-07-03

How to Cite

Intifadhah, S. H., Nurhanafi, K., Astuti, F., Munir, R., Hamdani, D., & Darminto, D. (2023). X-ray Absorption Near Edge Structure (XANES) Spectrum Interpretation for LiFePO4-Silicon Doped Cathode Material. Jurnal Fisika Unand, 12(3), 349–355. https://doi.org/10.25077/jfu.12.3.348-354.2023

Issue

Vol. 12 No. 3 (2023)

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Articles

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