Abstract
A novel sol–gel route based on V 2O 5· nH 2O hydro-gel was developed to prepare Li 3V 2(PO 4) 3/carbon composite materials. In this route, V 2O 5· nH 2O hydro-gel, NH 4H 2PO 4, Li 2CO 3 and glucose were used as starting materials and Li 3V 2(PO 4) 3/carbon composite materials were obtained by sintering precursor in flowing argon. The samples were characterized by XRD, SEM, galvanostatically discharge/discharge and CV techniques. XRD results showed Li 3V 2(PO 4) 3/carbon has a monoclinic structure indexed to the P2 1 /n space group. Li 3V 2(PO 4) 3/carbon cycled between 3.0 and 4.8 V showed that the first discharge capacity was 167.0 mAh/g, and after 50 cycles, the discharge capacity was 160.1 mAh/g. The testing results showed that Li 3V 2(PO 4) 3/carbon has good electrochemical Li insertion performance.
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