Synthesis of carbon-coated Li3VO4 and its high electrochemical performance as anode material for lithium-ion batteries
Synthesis of carbon-coated Li3VO4 and its high electrochemical performance as anode material for lithium-ion batteries
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碳包覆Li3VO4的合成及其作为锂离子电池负极材料的高电化学性能
DOI：
10.1016/j.jpowsour.2013.12.019
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发表时间：
2014-04-15
影响因子：
9.2
通讯作者：
Yan, Lin
中科院分区：
文献类型：
--
作者：
Liang, Zhiyong;Zhao, Yanming;Yan, Lin
采用简单的溶胶-凝胶法制备了碳包覆Li3VO4样品。X射线衍射和X射线光电子能谱分析结果表明，在还原气氛下，可以得到单相的Li3VO4，钒的价态为+5。在650 ℃下烧结的最终产品表现出良好的电子导电性，具有6.12%的残余碳。电化学测试表明，碳包覆的Li3VO4样品在0.18C下第一次和第二次循环的放电容量分别为662.6mAh g（-1）和507.4mAh g（-1），第二次循环的可逆容量（充电容量）接近480.0mAh g（-1）。在12C和40C下，样品的放电容量分别保持在180 mAh g（-1）和90 mAh g（-1）左右。(C)2013年由Elsevier B.V.出版
Carbon-coated Li3VO4 sample is synthesized by a simple sol-gel method. X-ray diffraction and X-ray photoelectron spectroscopy results show that single-phase Li3VO4 can be obtained in a reducing atmosphere with the valence of vanadium of +5. The final product sintered at 650 degrees C demonstrates a favorable electronic conductivity with 6.12% residual carbon. Electrochemical testing shows that the carbon-coated Li3VO4 sample display a discharge capacity of 662.6 mAh g(-1) and 507.4 mAh g(-1) at 0.18C in the first and the second cycle, respectively, and a reversible capacity (charge capacity) of similar to 480.0 mAh g(-1) can be obtained in the second cycle. Furthermore, the discharge charge-capacity of the sample can retain similar to 180 mAh g(-1) and similar to 90 mAh g(-1) at 12C and 40C, respectively. (C) 2013 Published by Elsevier B.V.