Jurnal Fisika Unand
Vol 12, No 3 (2023)

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

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)

Article Info

Publish Date
03 Jul 2023

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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Journal Info
Jurnal Fisika Unand
Website

Abbrev

jfu

Publisher

Universitas Andalas

Subject

Earth & Planetary Sciences Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

Description

Makalah yang dapat dipublikasikan dalam jurnal ini adalah makalah dalam bidang Fisika meliputi Fisika Atmosfir, Fisika Bumi, Fisika Intrumentasi, Fisika Material, Fisika Nuklir, Fisika Radiasi, Fisika Komputasi, Fisika Teori, Biofisika, ataupun bidang lain yang masih ada kaitannya dengan ilmu ...