锂钒氧化物的合成及电化学性能的表征  

Synthesis and electrochemical performance of Li_(1+x)V_3O_8

作　　者：张华香[1] 童庆松[1] 林素英[1] 陈前火[1] 

机构地区：[1]福建师范大学化学与材料科学学院,福建福州350007

出　　处：《无机盐工业》2004年第3期26-28,共3页Inorganic Chemicals Industry

基　　金：福建省教育厅(JA02159);福建自然科学(E0110021)基金资助项目。

摘　　要：在480℃、580℃和680℃下,分别烧结LiOH·H2O和NH4VO3的均匀混合物制得3种Li1.4V3O8样品。采用XRD、FTIR、循环伏安和充放电实验测试样品的结构和电化学性能之间的关系。XRD和FTIR的分析结果表明,合成的样品具有典型的Li1+xV3O8结构。充放电和循环伏安实验表明,480℃的样品可以达到500mA·h/g以上的高比容量,有一定的可充性。Three kinds of Li_(1.4)V_(3)O_(8)samples were synthesized by a solid-phase sintering process , in which the mixture of LiOH·H_(2)O and NH_(4)VO_(3) sintered at 480 ℃,580 ℃ and 680 ℃ in air atmosphere respectively.The measurements of XRD, FTIR,cyclic voltammogram and charge/discharge experiments were employed to study the relationship between structure and electrochemical performance of Li_(1.4)V_(3)O_(8).The experimental data of XRD and FTIR show that the synthesized samples possess typical structure of Li_(1+x)V_(3)O_(8).The charge/discharge experiment showed that 480 ℃ sample exhibits a capacity more than 500 mA·h/g in the first charge/discharge cycle.The results indicate that this synthesis technique not only have the advantage of convenient operation, but also can obtain a typical structure of Li_(1+x)V_(3)O_(8) with high capacity as well.

关 键 词：锂钒氧化物 合成 电化学性能 表征 烧结 锂离子电池 XRD FTIR 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ131.11[化学工程—无机化工]