Sr-doped LaInO3 and its possible application in a single layer SOFC

被引：69

作者：

He, HP ^{[1
]}

Huang, XJ ^{[1
]}

Chen, LQ ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Lab Solid State Ion, Beijing 100080, Peoples R China

来源：

SOLID STATE IONICS | 2000年 / 130卷 / 3-4期

关键词：

Perovskite-type oxide; oxygen ion conductivity; solid oxide fuel cell; LaInO3;

D O I：

10.1016/S0167-2738(00)00666-4

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 effects of dopants on the electrical conductivity of the perovskite-type oxide LaInO3 have been investigated. Replacement of La by Sr is the most effective way to enhance the conductivity of LaInO3, whereas Ca substitution for In is rather difficult due to the large difference in the ion radii. The optimum composition is La0.9Sr0.1InO3-delta whose maximum conductivity is 7.6 X 10(-3) S cm(-1) at 900 degrees C. The electrical conductivity of La0.9Sr0.1InO3-delta has been measured over a wide range of oxygen partial pressure from pO(2) =1 to 10(-25) atm. P-type and n-type behavior at high and low oxygen partial pressure have been observed, respectively, while at intermediate oxygen partial pressures, the electrical conductivity changes only slightly with the oxygen partial pressure. The concept of a single layer solid oxide fuel cell based on a La0.9Sr0.1InO3-delta ceramic pellet has been tested. A maximum power density of 3 mW cm(-2) at 800 degrees C was achieved when dilute H-2 and air were used as fuel and oxidizing agent, respectively. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：183 / 193

页数：11