Grindingasolagel synthesis and electrochemical performance of mesoporous Li3V2(PO4)3 cathode materials

Li3V2(PO4)3 precursor was obtained with V2O5ADTnH2O, LiOHADTH2O, NH4H2PO4 and sucrose as starting materials by grinding-sol-gel method, and then the monoclinic-typed Li3V2(PO4)3 cathode material was prepared by sintering the amorphous Li3V2(PO4)3. The as-sintered samples were investigated by X-ray d...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2013-02, Vol.23 (2), p.439-444
Main Authors: LIU, Guo-cong, LIU, You-nian, LIU, Su-qing
Format: Article
Language:English
Subjects:
Cathodes
Diffraction
Discharge
Precursors
Sintering
Sucrose
Transmission electron microscopy
X-rays
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Summary:Li3V2(PO4)3 precursor was obtained with V2O5ADTnH2O, LiOHADTH2O, NH4H2PO4 and sucrose as starting materials by grinding-sol-gel method, and then the monoclinic-typed Li3V2(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 Li3V2(PO4)3 sintered at 700 degree C possesses good wormhole-like mesoporous structure with the largest specific surface area of 188 cm2/g, and the smallest pore size of 9.3 nm. Electrochemical test reveals that the initial discharge capacity of the 700 degree C sintered sample is 155.9 mAADTh/g at the rate of 0.2C, and the capacity retains 154 mAADTh/g after 50 cycles, exhibiting a stable discharge capacity at room temperature.
ISSN:1003-6326