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Cathodic performance of VOPO4 with various crystal phases for Li ion rechargeable battery

Bustam, Mohamad Azmi and Ishihara, Tatsumi and Nishiguchi, Hiroyasu and Takita, Yusaku (2002) Cathodic performance of VOPO4 with various crystal phases for Li ion rechargeable battery. Electrochimica Acta , 48 . pp. 165-170.

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Abstract

Cathodic performance of six different VOPO4 phases for Li ion rechargeable battery was investigated. It was found that VOPO4 exhibits a high flat discharge potential of 3.7 V for Li ion electrochemical intercalation and de-intercalation excepting for b- and otypes. On the other hand, slightly higher flat discharge potential of 3.9 and 3.8 V was observed for b- and o-types. Capacity for Liintercalation is strongly related with the crystal structure of VOPO4. In particular, d-phase exhibits the largest reversible capacity ofca. 130 mAh/g among the examined VOPO4. High capacity for Li intercalation in d-phase VOPO4 hardly decreased over 30 times of charge and discharge cycles. Although the reversible capacity decreased with increasing the current density for charge and discharge, large capacity of 80 mAh/g was still sustained at 0.4 mA/cm2 for d-type VOPO4.

Item Type:Article
Subjects:Q Science > QD Chemistry
Departments / MOR / COE:Departments > Chemical Engineering
ID Code:3800
Deposited By: Assoc Prof Dr Mohamad Azmi Bustam @ Khalil
Deposited On:04 Jan 2011 00:36
Last Modified:19 Jan 2017 08:27

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