Influence of the grain size of samaria-doped ceria cathodic interlayer for enhanced surface oxygen kinetics of low-temperature solid oxide fuel cell

被引：38

作者：

Bae, Jiwoong ^{[1
]}

Hong, Soonwook ^{[1
]}

Koo, Bongjun ^{[1
]}

An, Jihwan ^{[2
]}

Prinz, Fritz B. ^{[2
,3
]}

Kim, Young-Beom ^{[1
,4
]}

机构：

[1] Hanyang Univ, Dept Mech Convergence Engn, Seoul 133791, South Korea

[2] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA

[3] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[4] Hanyang Univ, Inst Nano Sci & Technol, Seoul 133791, South Korea

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2014年 / 34卷 / 15期

基金：

新加坡国家研究基金会;

关键词：

Samaria-doped ceria; Composite electrolyte; Oxygen activation; Grain boundary; Solid oxide fuel cell; YTTRIA-STABILIZED ZIRCONIA; POLYCRYSTALLINE MATERIALS; BOUNDARY DIFFUSION; EXCHANGE-REACTIONS; SOFC; ELECTROLYTES; PERFORMANCE; ELECTRODES; TRANSPORT;

D O I：

10.1016/j.jeurceramsoc.2014.05.028

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：

The catalytic role and grain boundary effect of samaria-doped ceria (SDC) interlayers were investigated. To see the catalytic role, an SDC interlayer was deposited on a single crystalline YSZ (100) substrate by using the pulsed laser deposition (PLD) for an epitaxial film. The grain boundary effects were analyzed with SDC interlayers with various grain sizes on polycrystalline YSZ substrates. As a result, the membrane electrode assembly (MEA) with an epitaxial SDC interlayer exhibited a peak power density that was twice that of a YSZ controlled MBA. More detailed experiments were conducted with MEAs with various grain sizes. In the electrochemical analysis, the MEA with a nano grain SDC interlayer showed an increased maximum power density and lower cathodic impedance. This result suggests that the performance of low temperature solid oxide fuel cells (LT-SOFCs) could be enhanced by applying an SDC interlayer with nano grains for the enhanced oxygen reduction reaction. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：3763 / 3768

页数：6

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