介孔Li3V2（PO4）3正极材料的研磨－溶胶－凝胶法合成和电化学性能

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Bibliographic Details
Published in	中国有色金属学报：英文版 no. 2; pp. 439 - 444
Main Author	刘国聪刘又年刘素琴
Format	Journal Article
Language	English
Published	2013
Subjects	Li3V2（PO4）3 介孔结构正极材料电化学性能研磨－溶胶－凝胶法
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Bibliography:	43-1239/TG Guo-cong LIU, You-nian LIU, Su-qing LIU 1. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China; 2. Department of Chemical Engineering, Huizhou University, Huizhou 516007, China Li3Vz（PO4）3; cathode material; mesoporous structure; grinding-sol-gel method; electrochemical performance Li3V2（PO4）3 precursor was obtained with V2Os.nH2O , LiOH＇H2O, NH4H2PO4 and sucrose as starting materials by grinding-sol-gel method, and then the monoclinic-typed Li3Vz（PO4）3 cathode material was prepared by sintering the amorphous Li3V2（PO4）3. The as-sintered samples were investigated by X-ray diffraction （XRD）, transmission electron microscopy （TEM）, N2 adsorption-desorption and electrochemical measurement. It is found that Li3Vz（PO4）3 sintered at 700 ℃ possesses good wormhole-like mesoporous structure with the largest specific surface area of 188 cmZ/g, and the smallest pore size of 9.3 nm. Electrochemical test reveals that the initial discharge capacity of the 700 ℃ sintered sample is 155.9 mA.h/g at the rate of 0.2C, and the capacity retains 154 mA.h/g after 50 cycles, exhibiting a stable discharge capacity at room temperature.
ISSN:	1003-6326