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Title: Compliant Glass Composite Sealants for SOFC Stacks

Abstract

Solid oxide fuel cells (SOFCs) require robust, hermetic seals that can prevent both fuel leakage and direct mixing of fuel and air. The seal materials should be electrical insulators and should be chemically and mechanically stable in high temperature reactive environments (e.g., moist reducing and/or oxidizing conditions). The seals should exhibit no deleterious interfacial reactions with other cell components, should be created at a low enough temperature to avoid damaging cell components (not higher than 900°C for some materials), and should not migrate or flow from the designated sealing region because of any applied load during cell operation. In addition, the seals should be able to withstand numerous thermal cycles between the operational temperature (e.g., 700-900°C) and room temperature. The developed “compliant (or viscous)” glass composite sealants possess desirable thermo-mechanical properties and thermo-chemical characteristics. The glass composite seals withstood repeated thermal cycles under the SOFC operating conditions. In addition, they are able to accommodate relative motion between the surfaces being sealed without the development of permanent leaks, and to “reseal” cracks created from thermal stresses through viscous flow.

Authors:
;
Publication Date:
Research Org.:
MO-SCI Corporation
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1490370
Report Number(s):
DOE-MO-SCI-0018558
DOE Contract Number:  
SC0018558
Type / Phase:
SBIR (Phase I)
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
compliant, composite, sealant, viscous, sealing glass, self-healing, solid oxide fuel cell, SOFC

Citation Formats

Kim, Cheol-Woon, and Brow, Richard K. Compliant Glass Composite Sealants for SOFC Stacks. United States: N. p., 2019. Web.
Kim, Cheol-Woon, & Brow, Richard K. Compliant Glass Composite Sealants for SOFC Stacks. United States.
Kim, Cheol-Woon, and Brow, Richard K. Tue . "Compliant Glass Composite Sealants for SOFC Stacks". United States.
@article{osti_1490370,
title = {Compliant Glass Composite Sealants for SOFC Stacks},
author = {Kim, Cheol-Woon and Brow, Richard K},
abstractNote = {Solid oxide fuel cells (SOFCs) require robust, hermetic seals that can prevent both fuel leakage and direct mixing of fuel and air. The seal materials should be electrical insulators and should be chemically and mechanically stable in high temperature reactive environments (e.g., moist reducing and/or oxidizing conditions). The seals should exhibit no deleterious interfacial reactions with other cell components, should be created at a low enough temperature to avoid damaging cell components (not higher than 900°C for some materials), and should not migrate or flow from the designated sealing region because of any applied load during cell operation. In addition, the seals should be able to withstand numerous thermal cycles between the operational temperature (e.g., 700-900°C) and room temperature. The developed “compliant (or viscous)” glass composite sealants possess desirable thermo-mechanical properties and thermo-chemical characteristics. The glass composite seals withstood repeated thermal cycles under the SOFC operating conditions. In addition, they are able to accommodate relative motion between the surfaces being sealed without the development of permanent leaks, and to “reseal” cracks created from thermal stresses through viscous flow.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {1}
}

Technical Report:
This technical report may be released as soon as January 11, 2023
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that may hold this item. Keep in mind that many technical reports are not cataloged in WorldCat.

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