Ph.D. in Materials Science and Engineering Hanrui Su will present a Ph.D. defense on Monday (Nov. 20) at 2 p.m. in M&M 610. Su is advised by Yun Hang Hu. Su's dissertation is titled "Carbonate-Superstructured Solid Fuel Cells with Hydrocarbon Fuels." From the abstract: Solid oxide fuel cells (SOFCs) have gained prominence as high-efficiency electric generators, yet their high operating temperatures (>800°C) present challenges in terms of system cost, complexity, and long- term durability.