Abstract
Lithium Ferro Phosphate Carbon Composite (LFP/C) had been synthesized using solid-state reaction method. Magnetite sand Fe 3 O 4 was used as Fe- source in LFP/C synthesized. Calcination temperature of the sample performed at 400, 500, and 600°C. The phase and composition of samples determined by Rietveld analysis of X-ray diffraction (XRD) pattern. The dominant identified phase at 400°C was diphosphate LiFeP 2 O 7 , and the others phases were nasicon Li 3 Fe 2 (PO 4 ) 3 and hematite Fe 2 O 3 . As the temperature getting higher the diphosphate phase LiFeP 2 O 7 transform to nasicon Li 3 Fe 2 (PO 4 ) 3 .The chemical bonds, lattice vibration and other structural features of the sample were investigated using FTIR spectroscopy in range of 1400 – 400 cm -1 . Specific vibration modes in LFP-1 to LFP-3 for each bonding were shown by the high intense in certain wavenumber.
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