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Effect of Different Solvents on the Synthesis of d-Vanadyl Phosphate and Its Performance as Cathode for Li-ion Battery

Bustam, Mohamad Azmi and Mohd Shariff, Azmi and Maitra, Saikat and Ishihara, Tatsumi (2010) Effect of Different Solvents on the Synthesis of d-Vanadyl Phosphate and Its Performance as Cathode for Li-ion Battery. Trans. Ind. Ceram. Soc., 69 (4). pp. 235-239.

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Abstract

In the present work d-vanadyl phosphate (VOPO4) was synthesized in the presence of different solvents like water, ethanol, diethyl ketone and 2-propanol. Role of these solvents on the Li-intercalation behaviour of synthesized d-VOPO4 has been studied. The solvents affected significantly the size of the crystallites and the level of impurities in the synthesized material. d-VOPO4 synthesized using water as solvent, possessed a significant Li-intercalation capacity ca., 124 mAh.g–1 at 3.7 V corresponding to 75% of its theoretical capacity. Among the organic solvents used, sample prepared using ethanol exhibited the highest Li intercalation capacity. Small amount of b-phase was observed in the synthesized d-VOPO4 (with phosphate/vanadium ratio of 2) using ethanol and Li-intercalation capacity of this phase was about 137 mAh.g–1, corresponding to 85% of the theoretical capacity. The capacity was found to be almost stable at 110 mAh.g–1 over 100 cycles.

Item Type:Article
Subjects:T Technology > T Technology (General)
Departments / MOR / COE:Departments > Chemical Engineering
ID Code:3719
Deposited By: Assoc Prof Dr Mohamad Azmi Bustam @ Khalil
Deposited On:28 Dec 2010 00:25
Last Modified:21 Mar 2014 20:54

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