Deformation behavior and leakage tests of alternate sealing materials for SOFC stacks

被引：78

作者：

Bram, M ^{[1
]}

Reckers, S ^{[1
]}

Drinovac, P ^{[1
]}

Mönch, J ^{[1
]}

Steinbrech, RW ^{[1
]}

Buchkremer, HP ^{[1
]}

Stöver, D ^{[1
]}

机构：

[1] Forschungszentrum Julich, Inst Mat & Proc Energy Syst IWV, Julich, Germany

来源：

JOURNAL OF POWER SOURCES | 2004年 / 138卷 / 1-2期

关键词：

solid oxide fuel cells; compressive metallic seals; mica; mechanical properties; leakage rate; stack testing;

D O I：

10.1016/j.jpowsour.2004.06.041

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：

Compression seals based on metal/mica composites were investigated under solid oxide fuel cell (SOFC) operating conditions. Since a compressive force has to be permanently applied in this sealing concept, the mechanical properties of the sealing materials and the SOFC components also became important for maintaining gas tightness. Leakage tests with a sandwich arrangement of mica paper and embossed metallic profiles show leak rates of <1 x 10(-4) mbar l/mm s under an applied normalized compressive load of 2.7 N/mm (0.7 MPa). Also under thermal cycles between ambient temperature and 800degreesC this leak rate does not change due to the elastic response of the seal. Compression tests with the seals in contact with SOFC membranes reveal no damage to the membranes. First results of leakage tests with SOFC stacks are presented, which may serve as a reference for future leakage tests of alternative sealing systems. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：111 / 119

页数：9

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