ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Extensive interfacial reactions are known to occur between Fe-Co based perovskite cathode materialsand the standard solid oxide fuel cell (SOFC) yttria stabilized zirconia (YSZ) electrolyte. Thin filmsof gadolinia doped ceria (GDC) could be used as a diffusion barrier between the cathode and theelectrolyte. The present work investigates spin coating thin diffusion reaction inhibiting films ontoSOFC electrolytes. The chemical and structural evolution of ethylene glycol based precursor solutionis studied by means of rheology, x-ray diffraction (XRD), high temperature XRD (HT-XRD),Fourier-transformed infrared spectroscopy (FTIR) and differential thermal analysis (DTA). Thestudies show that cerium formate is formed as an intermediate resin. Thin films, up to 500 nm thick,of gadolinia doped ceria (GDC) are successfully produced by multiple spin coating of polymerizedethylene glycol derived solutions on 200 1m thick YSZ tapes. The GDC and YSZ interfacial surfacemorphology and film thickness are studied by scanning electron microscopy (SEM) and atomic forcemicroscopy (AFM). These films are shown to successfully prevent the creation of non-conductingreaction phases at the cathode-electrolyte interface by blocking interdiffusion
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/39/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.15-17.293.pdf
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