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
收藏
页码：109 / 114
页数：6
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