磷酸钒锂的电化学性能与动力学特征  

Electrochemical performance and kinetic characteristics of lithium vanadium phosphate

作　　者：徐艳辉[1,2] 范富强[1] 孟波[1] 耿海龙 

机构地区：[1]苏州大学物理与光电能源学部,江苏苏州215006 [2]山东齐星新材料科技有限公司,山东滨州256200

出　　处：《电池》2014年第2期74-76,共3页Battery Bimonthly

基　　金：江苏省自然科学基金项目(BK2009110)

摘　　要：采用溶胶-凝胶法合成磷酸钒锂[Li3V2(PO4)3],用XRD测试分析晶体结构,用恒流充放电和交流阻抗技术分析电化学性能及不同荷电态下的阻抗特征,初步对比3个Li+嵌脱过程中Li+扩散系数的相对关系以及材料导电性、线性极化电阻的变化。Lithium vanadium phosphate[ Li3V2 （PO4 ）3 ] was synthesized by using sol-gel method and characterized by XRD tech- nique. The electrode properties were investigated by galvanostatic charge-discharge tests. The electrochemical impedance spectros- copy was used to characterize its kinetics at different states of charge. Primary comparison of Li ＋ diffusivity,linear polarization re- sistance and conductivity during the de-intercalation of three Li ＊ was performed.

关 键 词：磷酸钒锂[Li3V2(PO4)3] 交流阻抗 锂离子电池 正极 

分 类 号：TM912.9[电气工程—电力电子与电力传动]