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

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