Mitigation of Chromium Impurity Effects and Degradation in Solid Oxide Fuel Cells: The Roles of Reactive Transport and Thermodynamics


Compositionally graded cathodes as a potential<br/>solution to mitigate chromium impurity effects
Compositionally graded cathodes as a potential
solution to mitigate chromium impurity effects
Trustees of Boston University
Website:  Boston University
Award Number:  FE0023325
Project Duration:  10/01/2014 – 09/30/2018
Total Award Value:  $1,000,000
DOE Share:  $800,000
Performer Share:  $200,000
Technology Area:  Solid Oxide Fuel Cells
Key Technology:  Cell Technology
Location:  Boston, MA

Project Description

Boston University will team with FuelCell Energy to understand the detailed mechanisms of chromium poisoning in the cathode of solid oxide fuel cells (SOFCs) and provide solutions that eliminate or mitigate chromium poisoning in cathodes, reducing or eliminating its effects on SOFC power systems. The project includes fabrication and testing of cells, modeling the thermodynamics and transport phenomena of chromium poisoning, and implementation of solutions to chromium poisoning at the single-cell level.

Project Benefits

The formation of chromates (and chromites) at the interfaces degrades the performance of solid oxide fuel cells. The chromates form due to the reaction of the chromium oxide scale on the surface of the interconnect, which then migrate to the triple phase boundaries and deposit there, leading to performance degradation and cascading failure of the cell. This work will provide solutions that mitigate chromium poisoning and increase the overall performance of SOFC power systems.

Contact Information

Federal Project Manager 
Steven Markovich:
Technology Manager 
Shailesh Vora:
Principal Investigator 
Srikanth Gopalan:

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