Improvement of thermal cycle characteristics of a planar-type solid oxide fuel cell by using ceramic fiber as sealing material

Citation
S. Taniguchi et al., Improvement of thermal cycle characteristics of a planar-type solid oxide fuel cell by using ceramic fiber as sealing material, J POWER SOU, 90(2), 2000, pp. 163-169
Citations number
4
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics","Environmental Engineering & Energy
Journal title
JOURNAL OF POWER SOURCES
ISSN journal
0378-7753 → ACNP
Volume
90
Issue
2
Year of publication
2000
Pages
163 - 169
Database
ISI
SICI code
0378-7753(200010)90:2<163:IOTCCO>2.0.ZU;2-J
Abstract
The objective of this paper is to improve the endurance of solid oxide fuel cell (SOFC) against thermal cycles by reducing the stress caused by the di fference in thermal expansion coefficients of alloy separator and electroly te. The thermal cycle characteristics were improved by using a ceramic fibe r for the sealing material. The ceramic fiber seemed to play the role of su ppressing electrolyte-cracking by relaxing the stress set up during thermal cycles. The appropriate structure for the sealing material was investigate d with 200 mm X 150 mm X 4 combined-cell single-layer modules. The glass wa s arranged around the internal manifold to suppress gas leakage, and the ce ramic fiber was arranged around the electrolyte to prevent the glass from c ontacting the electrolyte. It was confirmed that the thermal cycle characte ristics can be improved and that good cell performance can be maintained by adopting this gas seal structure. (C) 2000 Elsevier Science S.A. All right s reserved.