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Selective supervalent cations (M = Ni, Mn, La etc.) doped LiFePO 4 (LFP) is an effective route to enhance its electrical conductivity, thereby improving electrochemical performances of lithium – ion batteries. For this purpose, nickel doped LiFePO 4 based cathode material was investigated at different substitution amounts (x Ni = 0.05, 0.10). LiFe 1 – x Ni x PO 4 (LFNP) was synthesized from Ni(NO 3 ) 2 .6H 2 O, LiOH.H 2 O, FeSO 4 .7H 2 O, H 3 PO 4 , and ascorbic acid precursors via solvothermal technique, followed by calcination in nitrogen atmosphere at 550 °C for 5 h. The structure and morphology of synthesized materials were examined by X – ray diffraction, Scanning electronic microscopy and Raman vibrational micro – spectroscopy. The electrochemical performances of doped materials were studied in Swagelok – type cell using LiPF 6 /EC – DMC (1:1) as electrolyte. LiFe 1 – x Ni x PO 4 was shown to exhibit homogenous particles size of 50 ¸ 150 nm. The doped materials were titrated to quantify iron and nickel contents in samples. As anticipated, the electrochemical performances of LiFe 1 – x Ni x PO 4 were significantly enhanced compared to those of undoped LiFePO 4 .

ENHANCEMENT OF Li–ION BATTERY CAPACITY USING NICKEL DOPED LiFePO4 AS CATHODE MATERIAL