X-ray Diffraction (XRD) and X-ray Absorption Near Edge Spectroscopy (XANES) Analyses of LiFe1-xCuxPO4Powders

Muyasaroh, Anisa Fitri; Latif, Chaironi; Lapboonruang, S.; Firdausi, Amalia; Mardiana, D.; Pratapa, Suminar

doi:10.1088/1757-899x/515/1/012009

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…FeO, Fe2O3 and FePO4 were use for standard sample to comparison. Furthermore, XANES data were analyzed and fitted using Athena software Muyasaroh et al, 2019;Maghfirohtuzzoimah et al, 2021).…”

Section: Characterizationmentioning

confidence: 99%

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

Intifadhah

Nurhanafi

Astuti

et al. 2023

JFU

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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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Section: Characterizationmentioning

confidence: 99%

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

Intifadhah

Nurhanafi

Astuti

et al. 2023

JFU

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“…The absorption edge energy (E0) is used to determine the oxidation state and can be seen clearly using the first derivative of normalized absorption (Chiang et.al., 2012). XANES analysis in LiFePO4 with Cu doping is performed by comparing the spectrum of samples with those of standard-iron oxide (FeO,Fe2O3 and Fe3O4) and can be used to determine the oxidation state in Fe K-edge due to atomic doping (Cu in Fe) (Muyasaroh et al, 2019). Fitriana et al used interpolation linear technique to estimate the oxidation state of Fe (Fitriana et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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

Intifadhah

Maghfirohtuzzoimah

Az-Zahra

et al. 2021

J. Phys.: Theor. Appl.

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The development of LiFePO4 as a cathode materials on lithium-ion battery was increased with the use of additional techniques such as atomic doping and coating. The material used in this report was LiFeSi0.06P0.94O4/C (LFP Si-6%), synthesized with doping silicon 6% and 11wt% carbon coating by a solid state method. X-ray Absorption Spectroscopy (XAS) characterization was used to investigate the effect on electronic and atomic structure of LFP Si-6%, especially in X-ray Absorption Near Edge Strucuture (XANES) region. XANES data measured on Fe K-edge and Si K-edge. Fe foil, FeO, Fe2O3, FePO4, Si powder, SiO, SiO2 were used as a standard sample for comparison with the result of LFP Si-6%. XANES analysis showed that the energy absorption of Fe K-edge and Si K-edge in LFP Si-6% was 7124.94 eV and 1846.16 eV, respectively. The oxidation state of Fe was Fe2.576+ between Fe2+ and Fe3+, while Si was close to the estimation of Si4+. In addition, the linear combination fitting (LCF) in XANES Fe K-edge was performed to show the ratio of Fe2+/Fe3+ (FeO/Fe2O3).

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Synchrotron crystal and local structures, microstructure, and electrical characterization of Cu-doped LiFePO4/C via dissolution method with ironstone as Fe source

Latif

Firdausi²,

Nihlatunnur³

et al. 2022

J Mater Sci: Mater Electron

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X-ray Diffraction (XRD) and X-ray Absorption Near Edge Spectroscopy (XANES) Analyses of LiFe_1-xCu_xPO₄Powders

Cited by 4 publications

References 16 publications

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

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

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

Synchrotron crystal and local structures, microstructure, and electrical characterization of Cu-doped LiFePO4/C via dissolution method with ironstone as Fe source

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