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Title: Electrically Conductive and Protective Coating for Planar SOFC Stacks

Abstract

Ferritic stainless steels are preferred interconnect materials for intermediate temperature SOFCs because of their resistance to oxidation, high formability and low cost. However, their protective oxide layer produces Cr-containing volatile species at SOFC operating temperatures and conditions, which can cause cathode poisoning. Electrically conducting spinel coatings have been developed to prevent cathode poisoning and to maintain an electrically conductive pathway through SOFC stacks. However, this coating is not compatible with the formation of stable, hermetic seals between the interconnect frame component and the ceramic cell. Thus, a new aluminizing process has been developed by PNNL to enable durable sealing, prevent Cr evaporation, and maintain electrical insulation between stack repeat units. Hence, two different types of coating need to have stable operation of SOFC stacks. This paper will focus on the electrically conductive coating process. Moreover, an advanced coating process, compatible with a non-electrically conductive coating will be

Authors:
;
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1434872
Report Number(s):
PNNL-SA-125322
AA6040000
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Conference
Resource Relation:
Conference: ECS Transactions, 78(1):1633-1640
Country of Publication:
United States
Language:
English

Citation Formats

Choi, Jung-Pyung, and Stevenson, Jeffry W. Electrically Conductive and Protective Coating for Planar SOFC Stacks. United States: N. p., 2017. Web. doi:10.1149/07801.1633ecst.
Choi, Jung-Pyung, & Stevenson, Jeffry W. Electrically Conductive and Protective Coating for Planar SOFC Stacks. United States. doi:10.1149/07801.1633ecst.
Choi, Jung-Pyung, and Stevenson, Jeffry W. Mon . "Electrically Conductive and Protective Coating for Planar SOFC Stacks". United States. doi:10.1149/07801.1633ecst.
@article{osti_1434872,
title = {Electrically Conductive and Protective Coating for Planar SOFC Stacks},
author = {Choi, Jung-Pyung and Stevenson, Jeffry W.},
abstractNote = {Ferritic stainless steels are preferred interconnect materials for intermediate temperature SOFCs because of their resistance to oxidation, high formability and low cost. However, their protective oxide layer produces Cr-containing volatile species at SOFC operating temperatures and conditions, which can cause cathode poisoning. Electrically conducting spinel coatings have been developed to prevent cathode poisoning and to maintain an electrically conductive pathway through SOFC stacks. However, this coating is not compatible with the formation of stable, hermetic seals between the interconnect frame component and the ceramic cell. Thus, a new aluminizing process has been developed by PNNL to enable durable sealing, prevent Cr evaporation, and maintain electrical insulation between stack repeat units. Hence, two different types of coating need to have stable operation of SOFC stacks. This paper will focus on the electrically conductive coating process. Moreover, an advanced coating process, compatible with a non-electrically conductive coating will be},
doi = {10.1149/07801.1633ecst},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Dec 04 00:00:00 EST 2017},
month = {Mon Dec 04 00:00:00 EST 2017}
}

Conference:
Other availability
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