Influence of B2O3 doping on conductivity of LiTiO2 electrode material

被引：34

作者：

Vijayakumar, M ^{[1
]}

Hirankumar, G ^{[1
]}

Bhuvaneswari, MS ^{[1
]}

Selvasekarapandian, S ^{[1
]}

机构：

[1] Bharathiar Univ, Dept Phys, Solid State & Radiat Phys Lab, Coimbatore 641046, Tamil Nadu, India

来源：

JOURNAL OF POWER SOURCES | 2003年 / 117卷 / 1-2期

关键词：

fast ionic conductors; conductivity spectra; charge carrier concentration; dielectric spectra; lithium batteries; boron oxide;

D O I：

10.1016/S0378-7753(03)00110-1

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：

Fast ionic conductors XLiTiO2-YB2O3 with X:Y = 90:10 and 80:20 are prepared by the solid-state reaction method and subjected to ac conductivity measurements with silver electrodes in the frequency range 42 Hz to 5 MHz. The ac conductivity values are 6.47 x 10(-5) and 2.2 x 10(-7) Omega(-1) cm(-1), respectively. The ion hopping rate and charge carrier concentration are calculated by fitting the conductance spectra to the power law equation, using Almond and West formalisms. The charge carrier concentration is in the order of 10(25) and is independent of temperature, which supports the strong electrolyte model. The conductivity relaxation time is calculated from the peak frequency of the modulus spectra. The effect of B2O3 substitution is discussed. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：143 / 147

页数：5

共 23 条

[1] MOBILE ION CONCENTRATIONS IN SOLID ELECTROLYTES FROM AN ANALYSIS OF AC CONDUCTIVITY [J].