SIOC 中文
ACS
Adv search

Acta Chimica Sinica ›› 2007, Vol. 65 ›› Issue (1): 10-16. Previous Articles     Next Articles

Original Articles

Li3V2(PO4)3电极过程及其锂离子脱嵌动力学研究(I)

刘素琴, 李世彩, 黄可龙*   

  1. (中南大学化学化工学院 长沙 410083)
  • 投稿日期:2006-05-29 修回日期:2006-07-18 发布日期:2007-01-14
  • 通讯作者: 黄可龙

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*   

  1. (College of Chemistry & Chemical Engineering, Central South University, Changsha 410083)
  • Received:2006-05-29 Revised:2006-07-18 Published:2007-01-14
  • Contact: HUANG Ke-Long

PDF

1592

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.

Key words: Li-ion kinetics, extraction and insertion of Li＋, Li3V2(PO4)3, electrochemical impedance spectroscopy