Special Issue "Recent Advances in Materials for Solid Oxide Cells"
A special issue of Materials (ISSN 1996-1944).
Deadline for manuscript submissions: closed (30 June 2016)
Fuel cells, either low-temperature or high-temperature types, are on the way to market entry. Especially in the field of distributed energy conversion, as for household applications or stand-alone systems in the 1–250kW range, many companies have recently globally launched products which are now commercially available or which will be available within the next two years. Additionally, application fields like auxiliary power units for trucks, trains, ships or airplanes came up. In these fields, first system prototypes are operating on-board. High-temperature fuel cells, based on solid electrolytes, have special advantages with respect to fuel flexibility and efficiency.
As the “classical” solid oxide fuel cells are now introduced into the market segments, other, even more challenging, applications of solid oxide cells are of R&D interest. Worth naming are solid electrolysers to either generate a fuel (hydrogen or carbon-based fuels) or to act as intermediate power storage for volatile renewable energy generators, high-temperature batteries which use a fuel cell-electrolyser system as energy converting mediator, and low-temperature applications to even enter transportation applications.
These new application areas require novel materials, microstructures, cells, and stacks, which have to be addressed in the near future. Examples are: (i) by using a Solid Oxide Fuel Cells (SOFC) as electrolyser (SOEC) the fuel compositions differ greatly from fuel cell mode, e.g., high water vapor pressure or co-electrolysis of water/carbon monoxide; to question is how these different parameters affect the materials integrity and long-term stability; (ii) if an SOFC/SOEC system should be used as high-temperature battery: how to integrate a relevant type of storage (e.g., hydrogen tank or metal/metal oxide system) and to investigate the influence of charging-discharging cycles on the cells performance and microstructure; (iii) new, very low application temperatures (well below 500 °C) need novel materials for the electrolyte and the electrodes to reduce ohmic and polarization resistances.
This Special Issue highlights novel materials and microstructure developments in all aspects of Solid Oxide Cells used as fuel cells, electrolysers, or batteries.
Dr. Norbert H. Menzler
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- Fuel Cells
- High-Temperature Fuel Cells