Electrode coatings for high temperature hydrogen electrolysis

A discussion of fabrication techniques and performance testing of solid oxide components for use in hydrogen steam electrolysis is presented. Novel plasma spray techniques are utilized to deposit the thin ceramic oxide electrode, electrolyte, and interconnect layers on a planar intermetallic bipolar...

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Bibliographic Details
Published in:Journal of materials science 2007-04, Vol.42 (8), p.2717-2723
Main Authors: WINDES, W. E, SMITH, C, WENDT, D, ERICKSON, A, WALRAVEN, J, LESSING, P. A
Format: Article
Language:English
Subjects:
08 - HYDROGEN
ANNEALING
ANODES
Anodic coatings
CERAMICS
Chemistry
Coated electrodes
COATINGS
ELECTRIC CONDUCTIVITY
Electrical resistivity
Electrochemistry
ELECTRODES
ELECTROLYSIS
Exact sciences and technology
FABRICATION
fabrication techniques
General and physical chemistry
High temperature
High temperature electrochemistry (including molten salts)
HYDROGEN
hydrogen steam electrolysis
Liquids
Materials science
MICROSTRUCTURE
OXIDES
PERFORMANCE TESTING
PEROVSKITE
Perovskite structure
Perovskites
Plates (structural members)
Plating
POROSITY
PRECURSOR
solid oxide components
STEAM
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Summary:A discussion of fabrication techniques and performance testing of solid oxide components for use in hydrogen steam electrolysis is presented. Novel plasma spray techniques are utilized to deposit the thin ceramic oxide electrode, electrolyte, and interconnect layers on a planar intermetallic bipolar plate. Optimal porosity is achieved within the electrode microstructure through mixed feed techniques that are a combination of dry powder feed and liquid solution injection. The perovskite anode coatings formed from liquid precursor feedstock require post-deposition annealing in an oxygen-rich atmosphere to form the desired perovskite structures. Electrical conductivity measurements were measured for all electrodes and interconnect materials as a function of temperature to 1000 °C.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-006-1406-8