Mechanisms of lithium transport through transition metal oxides studied by analysis of current transients

被引：34

作者：

Shin, HC ^{[1
]}

Pyun, SI ^{[1
]}

Kim, SW ^{[1
]}

Lee, MH ^{[1
]}

机构：

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

来源：

ELECTROCHIMICA ACTA | 2001年 / 46卷 / 06期

关键词：

current transient; cell-impedance; LiNiO2; Li4/3Ti5/3O4; V2O5;

D O I：

10.1016/S0013-4686(00)00676-9

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Lithium transport through such transition metal oxides as Li1+delta[Ti5/3Li1/3]O-4, Li1-deltaNiO2 and LideltaV2O5 was investigated by analysis of current transients. All the experimental current transients in shape deviated markedly from the Cottrell character during the whole intercalation/deintercalation, and the initial current level varied linearly with the applied potential step according to Ohm's law. Moreover, it was observed that the current transient during phase transformation is characterised by a 'current plateau'. The current transient was simulated as a function of applied potential by numerical analysis assuming 'cell-impedance-controlled' lithium transport. The numerically simulated current transient featured quantitative behaviour characteristic of non-Cottrell behaviour and exhibited a 'current plateau'. The lithium transport mechanism through the oxides is discussed in terms of 'cell-impedance-controlled' intercalation/deintercalation. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：897 / 906

页数：10

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