The kinetics of lithium transport through LiNiO2 by current transient analysis

被引：20

作者：

Lee, MH ^{[1
]}

Pyun, SI ^{[1
]}

Shin, HC ^{[1
]}

机构：

[1] Korea Adv Inst Sci & Technol, Dept Mat Sci & Engn, Yusong Gu, Taejon 305701, South Korea

来源：

SOLID STATE IONICS | 2001年 / 140卷 / 1-2期

关键词：

Li1-delta NiO2; current transient; cell-impedance; numerical simulation;

D O I：

10.1016/S0167-2738(01)00700-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The kinetics of lithium transport through Li1-deltaNiO2 have been investigated in a 1 M solution of LiClO4 in propylene carbonate using current transient: technique. All the cathodic and anodic current transients experimentally measured hardly follow the Cottrell behaviour. From the linear relationship between initial current level in current transient and applied potential step. 'cell-impedance' was determined as a function of the electrode potential. 'Cell-impedance' with the electrode potential calculated from the current transient, is similar in value to that of internal cell resistance composed of solution resistance, contact resistance, and absorption resistance obtained from the Nyquist plot. Taking the variation of 'cell-impedance' with the electrode potential into account, the lithium transport through the Li1-deltaNiO2 electrode was theoretically analysed by means of numerical simulation of the current transient under the assumption of the 'cell-impedance controlled' lithium transport. The current transients theoretically calculated quantitatively shared well those experimentally measured. Lithium transport through the Li1-deltaNiO2 electrode being even degraded by jumping the electrode potential to the value higher than 4.20 VLi/Li+, proceeds under the 'cell-impedance controlled' constraint. (C) 2001 Elsevier Science B.V. All rights reserved.

引用

页码：35 / 43

页数：9

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