The Electrochemical Performance of Li3V2(PO4)3/Graphene Nano-powder Composites as Cathode Material for Li-ion Batteries

被引：5

作者：

Choi, Mansoo ^{[1
,2
]}

Kim, Hyun-Soo ^{[1
]}

Lee, Young Moo ^{[2
]}

Jin, Bong-Soo ^{[1
]}

机构：

[1] Korea Electrotechnol Res Inst, Battery Res Ctr, Chang Won 642120, South Korea

[2] Hanyang Univ, Dept Energy Engn, Seoul 133791, South Korea

来源：

JOURNAL OF ELECTROCHEMICAL SCIENCE AND TECHNOLOGY | 2014年 / 5卷 / 04期

关键词：

Lithium vanadium phosphate; graphene nano-powder; electrical conductivity; Li-ion battery; LITHIUM VANADIUM PHOSPHATE; HYDROTHERMAL SYNTHESIS; ANODE MATERIAL; CARBON; BEHAVIOR;

D O I：

10.5229/JECST.2014.5.4.109

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The Li3V2(PO4)(3)/graphene nano-particles composite was successfully synthesized by a facile sol-gel method. The addition of a graphene in Li3V2(PO4)(3)(LVP) showed the high crystallinity and influenced the morphology of the Li3V2(PO4)(3) particles observed in X-ray diffraction (XRD) and scanning electron microscopy (SEM). The LVP/graphene samples were well connected, resulting in fast charge transfer. The effect of the addition graphene nano-particles on electrochemical performance of the materials was investigated. Compared with the pristine LVP, the LVP/graphene composite delivered a higher discharge capacity of 122 mAh g(-1) at 0.1 C-rate, better rate capability and cyclability in the potential range of 3.0-4.3 V. The electrochemical impedance spectra (EIS) measurement showed the improved electronic conductivity for the LVP/graphene composite, which can ensure the high specific capacity and rate capability.

引用

页码：109 / 114

页数：6

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