Electrochemical in-situ conductivity measurements for thin film of Li1-xMn2O4 spinel

被引：46

作者：

Nishizawa, M ^{[1
]}

Ise, T ^{[1
]}

Koshika, H ^{[1
]}

Itoh, T ^{[1
]}

Uchida, I ^{[1
]}

机构：

[1] Tohoku Univ, Grad Sch Engn, Dept Appl Chem, Aoba Ku, Sendai, Miyagi 9808579, Japan

来源：

CHEMISTRY OF MATERIALS | 2000年 / 12卷 / 05期

关键词：

D O I：

10.1021/cm990696z

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：

Electrical conductivity of LiMn2O4, which is a promising cathode active material for lithium ion batteries, was monitored in situ during electrochemical lithium extraction and reinsertion reactions in 1 M LiClO4 propylene carbonate solution. The in-situ conductivity measurement was achieved by means of an interdigitated microarray electrode coated with a uniform and dense film of LiMn2O4 The conductivity of Li1-xMn2O4 was found to exhibit a peak-shaped profile as a function of lithium content. The conductivity of Cr3+-doped spinel, LiMn1.95-Cr0.05O4, decreased monotonically with decreasing lithium content. These results are discussed by considering the effects of phase transformation on the conductivity of these materials.

引用

页码：1367 / 1371

页数：5

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