共 4 条
Improved electrochemical Li insertion performances of Li3V2(PO4)3/carbon composite materials prepared by a sol-gel route
被引:25
作者:
Li, Yu-Zhan
[1
]
Zhou, Zhen
[1
]
Ren, Man-Man
[1
]
Gao, Xue-Ping
[1
]
Yan, Jie
[1
]
机构:
[1] Nankai Univ, Inst New Energy Mat Chem, Tianjin 300071, Peoples R China
关键词:
lithium-ion batteries;
sol-gel preparation;
Li3V2(PO4)(3)/carbon;
composite material;
D O I:
10.1016/j.matlet.2007.02.057
中图分类号:
T [工业技术];
学科分类号:
08 ;
摘要:
A novel sol-gel route based on V2O5 center dot nH(2)O hydro-gel was developed to prepare Li3V2(PO4)(3)/carbon composite materials. In this route, V2O5 center dot nH(2)O hydro-gel, NH4H2PO4, Li2CO3 and glucose were used as starting materials and Li3V2(PO4)(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 Li3V2(PO4)(3)/carbon has a monoclinic structure indexed to the P2(l)/n space group. Li3V2(PO4)(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 Li3V2(PO4)(3)/carbon has good electrochemical Li insertion performance. 2007 Elsevier B.V. All rights reserved.
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页码:4562 / 4564
页数:3
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