The University of South Carolina will develop accelerated test protocols based on recent preliminary results and theoretical analyses to establish common approaches for determining and projecting the durability of solid oxide fuel cell (SOFC) cathodes under simulated operation conditions. In addition, researchers will tune the microstructures of lanthanum strontium cobalt iron oxide (LSCF) and nickelates to simultaneously obtain high-power density and high-performance stability. Developing accelerated test protocols remains a challenge because operating SOFCs under normal conditions for tens of thousands hours is often costly and impractical. Therefore, accelerated tests are needed to facilitate rapid understanding of key durability and reliability issues. This project leverages research from a previous DOE contract, DE-FE0023475.