Pt-perovskite cermet cathode for reduced-temperature SOM

被引：48

作者：

Sasaki, K

Tamura, J

Hosoda, H

Lan, TN

Yasumoto, K

Dokiya, M

机构：

[1] Yokohama Natl Univ, Grad Sch Environm & Informat Sci, Yokohama, Kanagawa 2408501, Japan

[2] Tanaka Kikinzoku Kogyo KK, Atsugi, Kanagawa 2430213, Japan

来源：

SOLID STATE IONICS | 2002年 / 148卷 / 3-4期

关键词：

Pt-(LaSr)(CoFe)O-3 cermet cathode; reduced-temperature SOFCs; joining temperature of electrode; porosity and surface area;

D O I：

10.1016/S0167-2738(02)00116-9

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：

In order to develop a cathode for reduced-temperature solid oxide fuel cells, cermetting effect of LSCF with Pt was investigated. The effect of cermetting was observed. However, the obtained cathode activity was only an order of 0.5 S/cm(2) at 973 K. The activation energy at low and high LSCF/Pt ratios was smaller than that at medium LSCF/Pt ratio region. The cathode interfacial conductivity, sigma(E), of the very low Pt containing LSCF cermet cathode increased with increasing cathode thickness, whereas with high Pt content, sigma(E) showed optimum. These results suggested that Pt has both enhancing and obstructing functions. Based on SEM observation, the main reason of these complicated results was considered to be due to poor porosity and narrow surface area due to high electrode sintering temperature. Pt may enhance sintering of LSCF. So reduced-temperature cathode sintering should be investigated for LSCF/Pt cathode preparation. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：551 / 555

页数：5

共 15 条

[1] Mechanism and kinetics of oxygen reduction on porous La1-xSrxCoO3-δ electrodes [J].