Title:
DIFFUSION STABILIZED GAS BARRIERS
Document Type and Number:
WIPO Patent Application WO2004046627
Kind Code:
A3
Abstract:
A metallic barrier (1) and a method for separating fuel (5) and oxidant (6) gases are disclosed for use in high temperature systems such as solid oxide fuel cells (SOFC) or cell stacks. The metallic barrier (1) can be formed as a metallic bipolar separator plate or seal, without requiring the use of chromium alloys or noble metals. Controlled diffusion of fuel gas (5) through the metallic barrier (1) limits the thickness of an adherent electronically insulating oxide layer (4) on an opposing surface in contact with oxidant gas (6). This stabilized oxide layer may be penetrated by refractory conductive paths through the oxide layer and the metallic barrier.
Inventors:
MEACHAM GEORGE BEVAN KIRBY (US)
Application Number:
PCT/US2003/036199
Publication Date:
August 12, 2004
Filing Date:
November 14, 2003
Export Citation:
Assignee:
MEACHAM GEORGE BEVAN KIRBY (US)
International Classes:
B01D67/00; B01D71/02; H01M2/08; H01M2/14; H01M2/16; H01M8/02; H01M8/12; F25J; (IPC1-7): H01M2/14; H01M2/16; H01M2/08
Foreign References:
| US5942349A | 1999-08-24 |
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