| Li3V2(PO4)3电极过程及其锂离子脱嵌动力学研究(I) |
| |
| 引用本文： | 刘素琴,李世彩,黄可龙.Li3V2(PO4)3电极过程及其锂离子脱嵌动力学研究(I)[J].化学学报,2007,65(1):10-16. |
| |
| 作者姓名： | 刘素琴 李世彩 黄可龙 |
| |
| 作者单位： | 中南大学化学化工学院 长沙410083 |
| |
| 基金项目： | 国家自然科学基金(No.20376086)，教育部博士点基金(No.20030533001)资助项目 |
| |
| 摘 要： | 采用溶胶凝胶法合成了Nasicon化合物Li3V2(PO4)3, 采用X射线衍射(XRD)对产品进行了物相分析. 采用充放电测试, 循环伏安(CV)研究了化合物的电化学性能和锂离子的脱嵌过程, 计算出Li＋在固相中的扩散系数(10－8 cm2•s－1); 采用交流阻抗测试(EIS)研究了Li3V2(PO4)3的电极过程; 对两种类型的阻抗图谱提出不同等效电路模型并对结果进行了拟合; 研究了Li3V2(PO4)3电极过程动力学以及新鲜电极界面在充放电过程中的变化特性.
|
| 关 键 词： | 锂离子动力学 锂离子脱嵌 Li3V2(PO4)3 交流阻抗 |
| 收稿时间： | 2006-05-29 |
| 修稿时间： | 2006-05-292006-09-19 |
Investigations on the Electrode Process and Kinetics of Li-ion Extraction/Insertion in Li3V2(PO4)3 (I) |
| |
| LIU, Su-Qin,LI, Shi-Cai,HUANG, Ke-Long.Investigations on the Electrode Process and Kinetics of Li-ion Extraction/Insertion in Li3V2(PO4)3 (I)[J].Acta Chimica Sinica,2007,65(1):10-16. |
| |
| Authors: | LIU Su-Qin LI Shi-Cai HUANG Ke-Long |
| |
| Institution: | (College of Chemistry & Chemical Engineering, Central South University, Changsha 410083) |
| |
| Abstract: | The compound of monoclinic Li3V2(PO4)3, synthesized by sol-gel method, was certified by X-ray diffraction and its electrochemical performance was investigated by charge/discharge method, cyclic voltammetry and differential capacity data (Electrochemical Voltage Spectroscopy, EVS). Electrochemical impedance spectroscopy (EIS) using a two-electrode system in a frequency range from 1 MHz to 0.01 Hz was conducted on a Li3V2(PO4)3 electrode, and two different equivalent circuits was proposed for fitting the experimental results, consequently to evaluate the kinetics of Li-ion extraction and insertion at Li3V2(PO4)3 and its evolution of surface/interface. |
| |
| Keywords: | Li-ion kinetics extraction and insertion of Li Li3V2(PO4)3 electrochemical impedance spec- troscopy |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《化学学报》浏览原始摘要信息 |
| 点击此处可从《化学学报》下载免费的PDF全文 |
