Synthesis of LiVPO4F with high electrochemical performance by sol-gel route

钟胜奎; 陈伟; 李艳红; 邹正光; 刘长久

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Synthesis of LiVPO4F with high electrochemical performance by sol-gel route

机译：溶胶-凝胶法合成高电化学性能的LiVPO4F

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LiVPO4F was synthesized by a novel sol-gel method under Ar atmosphere using V2O5·nH2O,LiF,NH4H2PO4,and citric acid as starting materials,and its physicochemical properties were characterized using X-ray diffractometry(XRD),SEM,and electrochemical methods.The XRD patterns show that LiVPO4F displays a triclinic structure with a space group of p1.The SEM results indicate that the particle size of LiVPO4F is about 0.8μm together with homogenous distribution.The optimal sintering temperature and sintering time are 600℃and 20 h,respectively,in order to obtain pure triclinic LiVPO4F with good electrochemical performance.LiVPO4F has the discharge capacity of 134 mA·h/g in the range of 3.0-4.4 V at the first cycle,and the discharge capacity remains 125 mA·h/g after 30 cycles.The sol-gel method is suitable for the preparation of LiVPO4F cathode materials with good electrochemical performance for lithium ion batteries.

机译：以V 2 O 5·nH 2 O，LiF，NH 4 H 2 PO 4和柠檬酸为起始原料，在Ar气氛下通过新颖的溶胶-凝胶法合成了LiVPO 4 F，并利用X射线衍射（XRD），SEM和电化学方法表征了其理化性质。 XRD图谱表明，LiVPO4F呈三斜晶结构，空间群为p1。SEM结果表明，LiVPO4F的粒径约为0.8μm，且分布均匀，最佳烧结温度和烧结时间为600℃和20 h。为了获得具有良好电化学性能的纯三斜晶LiVPO4F，LiVPO4F在第一循环中的放电容量为134 mA·h / g，范围为3.0-4.4 V，放电容量保持为125 mA·h / g 30次循环后，溶胶-凝胶法适用于制备锂离子电池具有良好电化学性能的LiVPO4F正极材料。

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《中国有色金属学报：英文版》 |2010年第S1期|P.275-278|共4页
作者
钟胜奎; 陈伟; 李艳红; 邹正光; 刘长久;
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College of Chemistry and Bioengineering,Guilin University of Technology;

Key Laboratory of New Processing Technology for Nonferrous Metals and Materials,Ministry of Education,Guilin University of Technology;

Guangxi Key Laboratory of Environmental Engineering,Protection and Assessment,Guilin University of Technology;

College of Environmental Science and Engineering,Guilin University of Technology;

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Synthesis of LiVPO4F with high electrochemical performance by sol-gel route

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