Materials and Approaches for the Mitigation of SOFC Cathode Degradation in SOFC Power Systems

 

<strong>Top:</strong> Inconel Alloy 625-240hrs; Air-3% H<sub>2</sub>O.<br/>Coloration indicates Cr vapor deposit<br/><strong>Bottom:</strong> Pure Cr2O3source-250 hrs;<br/>Air-3%H<sub>2</sub>O. Modification-Absence of Cr vapor deposit
Top: Inconel Alloy 625-240hrs; Air-3% H2O.
Coloration indicates Cr vapor deposit
Bottom: Pure Cr2O3source-250 hrs;
Air-3%H2O. Modification-Absence of Cr vapor deposit
Performer: 
University of Connecticut
Website:  University of Connecticut
Award Number:  FE0023385
Project Duration:  10/01/2014 – 09/30/2018
Total Award Value:  $1,525,863
DOE Share:  $1,219,000
Performer Share:  $306,863
Technology Area:  Solid Oxide Fuel Cells
Key Technology: 
Location:  Storrs, Connecticut

Project Description

The University of Connecticut will develop and validate reliable, cost-effective approaches for minimizing/mitigating solid oxide fuel cell (SOFC) cathode (lanthanum strontium manganite [LSM] and lanthanum strontium cobalt ferrite [LSCF]) degradation through the incorporation of reliable materials and architectures to inhibit long-term detrimental solid-solid and solid-gas interactions. This work will develop and demonstrate the viability of the application of a cost-effective chromium getter to capture the chromium species originating from the metallic stack and balance-of-plant components. Cathode compositions will be modified to control and prevent oxide segregation and compound formation at the surface and interfaces during air exposure. Cathode contact layer modification will be developed to avoid chromium poisoning originating from metallic interconnects.

Project Benefits

Potential benefits of this project will mitigate the LSM and LSCF degradation arising due to the presence of moisture and chromium species in the real-world cathode environment. Cost effective chromium getter materials and architectures will be developed for application in stacks and balance of plant. Mitigation of the cathode degradation will significantly increase the performance stability and long-term reliability of SOFCs, thus accelerating the demonstration and deployment of the technology. The proposed research is directly relevant to the commercialization of SOFC systems.

Contact Information

Federal Project Manager 
Patcharin Burke: patcharin.burke@netl.doe.gov
Technology Manager 
Shailesh Vora: shailesh.vora@netl.doe.gov
Principal Investigator 
Prabhakar Singh: singh@engr.uconn.edu
 

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