Hyperstoichiometric Ruddleson-Popper Oxides as Solid Oxide Fuel Cell (SOFC) Cathodes for Applications in Undersea Unmanned Vehicles (UUV)
Abstract
Proposing the investigation of a system of cathode materials that are exciting from the standpoint of performance and will provide a rich avenue for interesting science related to the point defect chemistry, structure, surface science, and oxygen redox chemistry of transition metal oxides for the use in solid oxide fuel cells.NURP project between Boston University and NUWC.Abstract:The Naval Undersea Research Program is interested in power sources that operate for long periods of time at high power densities, so the footprint of such systems can be minimized. Another critical consideration is the need to minimize the volume of fuel and oxidant carried onboard since the space available is very restrictive. Further, the power systems should be stable against accidental or incidental exposure to impurities such as moisture, carbon dioxide, and salt. These operatingconditions and restrictions provide significant challenges, but also major opportunities to advancethe state-of-the-art of solid oxide fuel cell (SOFC) power systems. While conventional cathode materials such as strontium-doped lanthanum manganite (LSM) and strontium-doped lanthanum cobalt iron oxide (LSCF) have shown robust performance under atmospheric conditions, they may not be the most attractive given the challenges and opportunities described above. In particular, the operation in 100% oxygen atmosphere rather than air, provides a significant opportunity.Conventional perovskite cathodes either based on two-phase composite systems typified by LSM ~ yttria stabilized zirconia (YSZ) or mixed ionic electronic conducting (MIEC) LSCF may not exploit the 100% oxygen operation in Naval Undersea operations. Based on recent prior work, we propose a system of cathode materials that are exciting from the standpoint of performance and provide a rich avenue for interesting science related to the point defect chemistry, structure, surface science, and oxygen redox chemistry of transition metal oxides.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- May 05, 2017
- Source ID
- N000141712430
Entities
People
- Srikanth Gopalan
Organizations
- Boston University
- Office of Naval Research
- United States Navy