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Author(s): |
Jun-xi Zhang, Electrochemical Research Group, Shanghai University of Electric Power, Shanghai, 200090 China
Ming-yu Xu, Electrochemical Research Group, Shanghai University of Electric Power, Shanghai, 200090 China
Li-cheng Yan, Hangzhou Normal University, Hangzhou, 310036 China
Xi Yang, Electrochemical Research Group, Shanghai University of Electric Power, Shanghai, 200090 China
Tong Zhou, Electrochemical Research Group, Shanghai University of Electric Power, Shanghai, 200090 China
Zhi-hao Gu, Electrochemical Research Group, Shanghai University of Electric Power, Shanghai, 200090 China |
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Abstract: |
different sites V-doped LiFePO4 materials were synthesized via a co-precipitation process combined with calcinations at temperature of 700℃ over three hours. The morphology, size, phase structure, EDS and electrochemical properties of synthesized materials were characterized by scanning electron microscopy (SEM-EDS), powder X-ray diffraction (XRD) and electrochemical measurement techniques. The results show that the diameters of the as-prepared materials are about 300 nm and V5+ ions were distribute uniformly in the LiFePO4. V-doped LiFePO4 exhibits better electrochemical properties and cycle performances than the un-substituted LiFePO4, while the properties of the sample substituting V on the Fe site were better than that substituting V on the Li site.
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