Plasma spraying of porous Ni/ZRO{sub 2}-cermet anodes for the solid oxide fuel cells
- Institute of Technical Thermodynamics, Stuttgart (Germany)
Fuel cells convert the reaction energy of gaseous fuels directly into electrical energy. In the case of solid oxide fuel cells (SOFC) the reaction educts and products are transported to and removed from the electrode/electrolyte interfaces through the porous electrodes. The gas-tight electrolyte consisting of Yttria Stabilized Zirconia (YSZ) with an ionic conductivity separates the electrodes. The materials conventionally used for the anode and the cathode are a Ni/YSZ-cermet and a La{sub 0.8}Sr{sub 0.2}MnO{sub 3} (LSM), respectively. Therefore the multilayer structure Positive electrode - Electrolyte - Negative electrode (PEN) consists of ceramic and metallic components in dense and porous manner. Vacuum plasma spraying (VPS) promises a great potential to meet the economic requirements as well as the demanded technical specifications of the PEN production. Compared with conventional production processes the number of production steps and the production time can be reduced if the whole PEN was manufactured by VPS in a consecutive spray process. Furthermore, application of thermal spray methods avoids reactions between the cathode and electrolyte during the manufacturing due to the rapid and independent solidification of each particle on the substrate surface. Using conventional shaping plus sintering processes for PEN fabrication undesired phases may conventional shaping plus sintering processes for PEN fabrication undesired phases may occur at the cathode/electrolyte interface. Another advantage of the VPS process is the possibility to build up layers with graded composition and porosity. This work is focused on the production of porous electrodes.
- Research Organization:
- International Union of Pure and Applied Chemistry; American Physical Society, New York, NY (United States)
- OSTI ID:
- 223695
- Report Number(s):
- CONF-950875-Vol.2; TRN: 96:002546-0018
- Resource Relation:
- Conference: 12. international symposium on plasma chemistry, Minneapolis, MN (United States), 21-25 Aug 1995; Other Information: PBD: Jul 1995; Related Information: Is Part Of 12th International symposium on plasma chemistry. Proceedings, Volume 2; Heberlein, J.V.; Ernie, D.W.; Roberts, E.D. [eds.] [Minnesota Univ., Minneapolis, MN (United States)]; PB: 615 p.
- Country of Publication:
- United States
- Language:
- English
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