Citation: TANG Yan, FANG Wei-Mao, ZHONG Ben-He, LIU Heng, GUO Xiao-Dong. Synthesis and Electrochemical Performance of Nano-Structure Li3V2(PO4)3/C by Sol-Spray Drying Method[J]. Chinese Journal of Inorganic Chemistry, ;2013, 29(5): 915-921. doi: 10.3969/j.issn.1001-4861.2013.00.070
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Li3V2(PO4)3/C samples were successfully synthesized by sol-spray drying method, with LiOH·H2O, NH4VO3, H3PO4 and critic acid as raw materials, comparing the effect of mechamicalactivation before calcinations and direct calcination on the structure, morphology and electrochemical properties of the samples. The structure and morphology were characterized by XRD, SEM, BET and tap density test, and the electrochemical performance was studied by galvanostatic charge-discharge test, CV and EIS. The results show the samples are hollow spherical shell shape, which is composed of nano-sheet about 100nm and still keep the structure after mechamicalactivation. However, the crystallinity and tap density have improved a lot, so is the electrochemical performance. The discharge capacity is 123.6 mAh·g-1 at 0.1C, maintaining 107.8 and 106.0 mAh·g-1 even at high discharge rate of 10C and 20C. The EIS results indicate the samples prepared by the method have a smaller charge transfer resistance.
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