Impedance spectroscopy study of LiCuVO4
The compound LiCuVO4 was prepared by the solid state reaction method at 530℃ for 7 days. The X-ray diffraction pattern reveals single phase orthorhombic structure. Impedance spectroscopy measurements were carried out on pellets of the material and at temperatures from 150 to 600℃ with a 25℃ step. Using the results of these measurements, equivalent circuits were drawn, where each element represents a unique conductivity process within the material. The Arrhenius plots of the conductivity mechanisms obtained by the equivalent circuits were drawn and the activation energies of the corresponding processes were calculated. The activation energy of the process associated with double layer capacitance was found to be 1.10 eV, the activation energy of the grain boundary conductivity process was found to be 0.89 eV at temperatures from 150 to 450℃ and 1.89 eV at temperatures from 450 to 600℃ and the activation energy of the bulk conductivity was calculated to be 2.05 eV.
Lithium batteries Impedance spectroscopy LiCuVO4 Ionic conductivity
A.Kazakopoulos O.Kalogirou
Department of Electronics, Technological Educational Institute of Thessaloniki, 57 400 Thessaloniki, Department of Physics, Aristotle University of Thessaloniki, 54 124 Thessaloniki, Greece
国际会议
The 16th International Conference on Solid State Ionics(第十六届国际固态离子学会议)
上海
英文
936-940
2007-07-01（万方平台首次上网日期，不代表论文的发表时间）