| Electrochemical Performance of Cathode
LiVOPO4 Doped with Mo and W |
Mohamad Azmi Bustam*, Zakaria Man, Saikat Maitra1 and Tatsumi Ishihara2
pages 108-112
DOI:10.1080/0371750X.2013.794029
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| Abstract |
| Molybdenum (Mo) and tungsten (W) substituted LiV0.99X0.01OPO4 (X = Mo and W) compounds were synthesized by
impregnation method. The structures of samples were characterized by X-ray diffraction, and their electrochemical
properties were studied by using charge-discharge in galavanostatic mode versus Li+/Li. The electrical conductivity
of the samples was estimated by using impedance spectroscopy measurement with 2 point probe method at room
temperature. Phosphates of composition LiV0.99X0.01OPO4 with 1% Mo and W content in the structure exhibits high
intercalation potential of 3.95 V versus Li/Li+. It was found that the electrical conductivity of Mo and W substituted
samples at room temperature was improved to 4.8 10–6 and 1.5 10–5 S.cm–1, respectively. Discharge capacity
was also observed for the W doped sample with good retention performance up to 20 cycles at high current density
of C/5 (0.4 mA.cm–2). |
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