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

Sahara Hamas Intifadhah, Kholis Nurhanafi, Fahmi Astuti, Rahmawati Munir, Dadan Hamdani, Darminto Darminto


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.


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

Full Text:



Astuti, F.; Maghfirohtuzzoimah,VL.; Intifadhah, S H.; Az-zahra, P.; Arifin, P.; Klysubun, W.; Zainuri, M.; Darminto. (2021), “Local Structure And Electronic Structure of LiFePO4 as a Cathode for Lithium-Ion Batteries”. International Symposium on Physics and Applications (ISPA 2020).

Azzahra, P. (2019), “Material Aktif LiFeSixP1-xO4/C sebagai Katoda Baterail Ion Lithium dengan Variasi Doping Ion Si (0 < x < 0.06)”. Tugas Akhir. Institut Teknologi Sepuluh Nopember, Surabaya.

Banis, M.N., Wang, Z., Rousselot, S., Liu, Y., Hu, Y., Esfandarani, M.T., Bibienne, T., Gauthier, M., Li, R., Liang, G., Dolle, M., Saouriol, P., Sham T.-K., Sun, X. (2019), “Chemical Speciation and Mapping of The Si in Doped LFP Ingot with Synchrotron Radiation Technique”. Canadian Journal of Chemical Engineering. Vol.9999.

Cholsuk, C. (2019), “Intoduction to Artemis”. Manual Book, Beamline 8, Syctrotron Radiation, Thailand.

Fitriana, F., Zainuri, M., Baqiya, M. A., Kato, M., Kidkhunthod, P., & Suasmoro, S. (2020). “Local Structure Analysis of BO6 (B = Fe, Cu) Octahedron Correlated withThe Magnetic Properties of Cu-doped Ba0.5Sr0.5FeO3–δ”. Bulletin of Materials Science, 43(1). doi:10.1007/s12034-020-02140-4.

Haas, O., Deb, A., Cairns, E. J., & Wokaun, A. (2005), “Synchrotron X-Ray Absorption Study of LiFePO4 Electrodes". Journal of The Electrochemical Society. 152(1), A191. doi:10.1149/1.1833316.

Husain, H., Sulthonul, M., Hariyanto, B., Taryana, Y., Klyusubun, W., Wannapaiboon, S., Pratapa, S. (2020), “The Structural and Magnetic Characterization of Ironstone-Derived Magnetite Ceramic Nanopowders”. Journal of Materials Science: Materials in Electronics, 31(15), 12398–12408. doi:10.1007/s10854- 020-03786-w.

Intifadhah, S H., Maghfirohtuzzoimah, V L, Azzahra, P., Klysubun, W., Astuti, F., Zainuri, M., Darminto. (2021), “Oxidation State Analysis of LiFeSixP1-xO4/C (x = 0.06) with X-ray Absorption Near Edge Structure (XANES) in Fe K-edge and Si K-edge”. Journal of Physics: Theories and Applications. Vol. 5 No. 1 (2021) 37-43.

Kelly, S.D. (2008), “Analysis of Soils and Minerals Using X-ray Absorption Spectriscopy”. SSSA Book Series of Mineralogical Methods. No.5, Chap.14.

Klysubun, W., Tarawarakarn, P., Thamsanong, N., Amonpattaratkit, P., Cholsuk, C.,Lapboonrueng, S., Wongtepa, W. (2020), “Upgrade of SLRI BL8 Beamline for XAFS Spectroscopy in A Photon Energy Range of 1–13 keV”. Radiation Physics and Chemistry, 175, 108145. doi:10.1016/j.radphyschem.2019.02.004.

Latif, C., Negara, V. S. I., Wongtepa, W., Thamatkeng, P., Zainuri, M., & Pratapa, S. (2018), “Fe K-Edge X-ray Absorption Near-Edge Spectroscopy (XANES) and Xray Diffraction (XRD) Analyses of LiFePO4 and Its Base Materials”. Journal of Physics: Conference Series, 985, 012021. doi:10.1088/1742-6596/985/1/012021.

Liu, Y., Qin, W., Zhang, D., Feng, L., Fu, L. (2020), “Effect of Na+ in situ doping on LiFePO4/C Cathode Material for Lithium-Ion Batteries”. Progress in Natural Science: Materials International. Elsevier.

Maghfirohtuzzoimah, V.L, Intifadhah, S.H., Azzahra, P., Klysubun, W., Sari, D.P., Watanabe, I., Zainuri, M., Astuti, F. (2021), “Local Structure and Magnetism of LiFeSi0.01P0.99O4/C as A Cathode Material on Lithium Ion Battery”. Journal of Magnetism and Its Applications, 1 (1) 2021, 1-4.

Muyasaroh, A. F., Latif, C., Lapboonruang, S., Firdausi, A., Mardiana,

D., & Pratapa, S. (2019), “X-ray Diffraction (XRD) and X-ray Absorption Near Edge Spectroscopy (XANES) Analyses of LiFe1-xCuxPO4 Powders”. IOP Conference Series: Materials Science and Engineering, 515, 012009. doi:10.1088/1757- 899x/515/1/012009.

Nannan, Z., Yongsheng, L. Xiaoke, Z., Li, W., Xinxin, Z., Yamian, W., Guangchuan, L. (2016), “Effect of Ce3+ Doping on The Properties of LiFePO4 Cathode Material”. Journal of Rare Earths, Elsevier. Vol. 34, No. 2, Feb. 2016, P. 174.

Wang, C.; Yuan, X.; Tan, H.; Jian, S.; Ma, Z.; Zhao, J.; Wang, X.; Chen, D.; Dong, Y. Three-Dimensional Carbon-Coated LiFePO4 Cathode with Improved Li-Ion Battery Performance. Coatings 2021, 11, 1137. doi.org/10.3390/coatings11091137.

Zainuri, M.., Triwikantoro, Azzahra, P. (2020), “Active Materials LiFeSixP1-xO4/C as Lithium Ion Battery Cathode with Doping Variations Si Ions (0≤x≤0,06)”. Journal of Key Engineering Materials, 860, 75–80. doi:10.4028/www.scientific.net/kem.860.75.

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


  • There are currently no refbacks.

Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License

Published by:

Departemen Fisika, FMIPA Universitas Andalas

Kampus Unand Limau Manis Padang Sumatera Barat 25163

Telepon 0751-73307