Higher ionic conductive ceria-based electrolytes for solid oxide fuel cells

被引：107

作者：

Omar, Shobit ^{[1
]}

Wachsman, Eric D. ^{[1
]}

Nino, Juan C. ^{[1
]}

机构：

[1] Univ Florida, Mat Sci & Engn, Gainesville, FL 32611 USA

来源：

APPLIED PHYSICS LETTERS | 2007年 / 91卷 / 14期

关键词：

D O I：

10.1063/1.2794725

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Codoping is used to enhance the ionic conductivity of ceria-based electrolytes. Sm3+ and Nd3+ were selected as codopants to promote low migration energy paths for oxygen vacancy diffusion, thereby increasing the ionic conductivity. Moreover, the use of codopants also increases the pre-exponential factor in the Arrhenius relationship, thus further improving the ionic conductivity. The ionic conductivity of SmxNdxCe1-2xO2-delta solid solutions is measured using electrochemical impedance spectroscopy. It was observed that for Sm0.075Nd0.075Ce0.85O2-delta, the grain ionic conductivity was 14.0x10(-3) S cm(-1) at 550 degrees C, which makes it one of the most promising ceria-based electrolytes for intermediate temperature solid oxide fuel cells. (C) 2007 American Institute of Physics.

引用

页数：3

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