The chemical diffusion of lithium ion in Li3V2(PO4)3 was investigated using cyclic

voltammetry and electrochemical impedance spectroscopy methods. The cyclic

voltammetry results showed that there existed a linear relationship between the

peak current and the square root of the scan rate. The impedance spectrum

exhibited a single semicircle and a straight line in the very low frequency region. A

linear behaviour was observed for every curve of real resistance as a function of the

inverse square root of the angular frequency in the very low frequency region. The

obtained chemical diffusion coefficient from electrochemical impedance

spectroscopy measurements varied from 10−9 to 10−8cm2/s; in good agreement with

cyclic voltammetry results.

Determination of the Chemical Diffusion Coefficient of Lithium in Li3V2(PO4)3.

A.Tang, X.Wang, G.Xu, Z.Zhou, H.Nie: Materials Letters, 2009, 63[16], 1439-41