Determination of the chemical diffusion coefficient of lithium in Li3V2(PO4)3

被引：40

作者：

Tang, Anping ^{[1
,2
]}

Wang, Xianyou ^{[2
]}

Xu, Guorong ^{[1
]}

Zhou, Zhihua ^{[1
]}

Nie, Huidong ^{[1
]}

机构：

[1] Hunan Univ Sci & Technol, Sch Chem & Chem Engn, Changsha 411201, Hunan, Peoples R China

[2] Xiangtan Univ, Sch Chem, Xiangtan 411105, Peoples R China

来源：

MATERIALS LETTERS | 2009年 / 63卷 / 16期

关键词：

Diffusion; Kinetics; Chemical diffusion coefficient; Li-3 V-2(PO4)(3); CV; EIS; VANADIUM PHOSPHATE; CATHODE;

D O I：

10.1016/j.matlet.2009.03.035

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The chemical diffusion of lithium ion in Li3V2(PO4)(3) were investigated by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) methods. The CV results show that there exists a linear relationship between the peak Current (i(p)) and the square root of the scan rate (nu(1/2)). The impedance spectrum exhibits a single semicircle and a straight line in a very low frequency region. A linear behavior was observed for every Curve of the real resistance as a function of the inverse square root of the angular frequency in a very low frequency region. The obtained chemical diffusion coefficient from EIS measurements varies within 10(-9) to 10(-8) cm(2).s(-1), in good agreement with those from CV results. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.

引用

页码：1439 / 1441

页数：3

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