In Phase I of this work, Mo-Sci Corporation (Mo-Sci) developed a prototype viscous glass solid oxide fuel cell (SOFC) seal. Mo-Sci has identified new glass compositions that have the appropriate viscosity and stability for this application. In Phase II, the compositions will be optimized and tested under more stringent conditions. Candidate glasses will be tested to ensure they do not adversely react with other SOFC components and that desired viscous properties are retained over long periods of time (SOFC target lifetime is 40,000 hours). Down-selected candidate glasses will be used to construct prototype seals that will undergo thermal cycle testing. A successful glass seal will make SOFCs more robust devices, expanding the number of applications that SOFCs can fulfill.
The U.S. Department of Energy (DOE) is developing the next generation of efficient fossil fuel technologies capable of producing affordable electric power with near-zero emissions. The Solid Oxide Fuel Cell (SOFC) program at DOE’s National Energy Technology Laboratory (NETL) is focused on developing low-cost, highly efficient SOFC power systems that are capable of simultaneously producing electric power, from either natural gas or coal, with carbon capture capabilities. Research is directed towards the technologies that are critical to the commercialization of SOFC technology. To successfully complete the development of SOFC technology from the present state to the point of commercial readiness, the SOFC Program efforts are aligned into three Key Technologies:
(1) Anode, Cathode, and Electrolyte (AEC) Development
(2) Atmospheric Pressure Systems
(3) Pressurized Systems
The AEC Development Key Technology is R&D in nature whereas the other two, Atmospheric Pressure Systems and Pressurized Systems, are focused on the development, demonstration, and deployment of SOFC power systems.
The AEC Development Key Technology consists of projects that will lead to substantially improved power density, enhanced performance, reduced degradation rate, and more reliable and robust systems. Research is focused on the technologies critical to the commercialization of SOFC technology, such as cathode performance, gas seals, interconnects, failure analysis, coal contaminants, fuel processing, and balance-of-plant components. Research is conducted at universities, national laboratories, small businesses, and other R&D organizations.
Mo-Sci Corporation will work to advance the development of viscous glass-based seals for solid oxide fuel cells. Viscous-seals are relatively new class of seals for solid oxide fuel cells that can repair in-situ cracks developed during the thermal process. Researchers will attempt to develop a glass composition capable of resisting oxidation and reduction environments while maintaining viscous characteristics over the 40,000 hour lifetime of a solid oxide fuel cell.
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