The University of South Carolina will develop lost cost, robust and durable SFM (Sr₂Fe_1.5 Mo_0.5O₆-δ) cathode materials to support Solid Oxide Fuel Cell (SOFC) commercialization. The overall objective is to evaluate SFM as a potential SOFC cathode material that can mitigate chromium (Cr)-poisoning, and to assess the long-term stability of the SFM cathode materials under practical SOFC operating conditions. The project will systematically evaluate long-term performance stability under the influence of contaminants in the cathode environment, such as Cr-species, CO₂, and moisture, with an emphasis on detailed assessment of Cr tolerance and mitigation of Cr poisoning. The project will study the chemical compatibility between SFM and Cr-species, then evaluate whether SFM can be used as a Cr getter material, characterize the SFM cathode performance, and evaluate whether the SFM cathode can be regenerated following Cr-poisoning. The project will evaluate the SFM cathode in symmetrical half-cell configuration, and then apply the developed SFM cathode in button cell configuration. Finally, the study will be expanded to large cells provided by industry. Multiphysics models will be developed to correlate the SFM materials properties and microstructure features under different cathode contaminants and operating conditions with cathode performance and stability. The expected outcome of the project is a new family of SOFC cathodes that demonstrate excellent cathode electrochemical performance, possess good stability in CO₂ and H₂O environments, have redox stability, and can potentially mitigate Cr-poisoning.