Fabrication and characterization of high-conductivity bilayer electrolytes for intermediate-temperature solid oxide fuel cells

被引：61

作者：

Park, JY ^{[1
]}

Yoon, H ^{[1
]}

Wachsman, ED ^{[1
]}

机构：

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

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2005年 / 88卷 / 09期

关键词：

D O I：

10.1111/j.1551-2916.2005.00475.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A stable bilayer electrolyte with high ionic conductivity was developed for intermediate-temperature solid oxide fuel cell operation. The bilayer structure improved the limited thermodynamic stability of bismuth oxides and prevented electronic conductivity of ceria-based oxides in reducing atmosphere. Bilayer electrolytes were formed by depositing thin and thick layers of erbia-stabilized bismuth oxide (ESB) on samaria-doped ceria (SDC) substrates, via pulsed laser deposition and dip-coating techniques. Scanning electron microscope (SEM) images of the ESB/SDC samples showed dense ESB layers and excellent adherence between both ESB and SDC phases. Interdiffusion between the two phases was not detected by X-ray diffraction and EDX. Measurements of the conductivity of SDC coated with ESB exhibited slightly higher total conductance than SDC.

引用

页码：2402 / 2408

页数：7

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