Benamira, Messaoud and Ringuede, Armelle and Cassir, Michel and Horwat, David and Pierson, Jean-François and Lenormand, Pascal and Ansart, Florence and Bassat, Jean-Marc and Fullenwarth, Julien Comparison between ultrathin films of YSZ deposited at the solid oxide fuel cell cathode/electrolyte interface by atomic layer deposition, dip-coating or sputtering. (2009) Open Fuels and Energy Science Journal, 2 (1). 87-99. ISSN 1876-973X
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Official URL: http://dx.doi.org/10.2174/1876973X01002010087
Abstract
The effect of an 80 nm YSZ interfacial layer, deposited onto a YSZ pellet by different techniques (dip-coating, sputtering and atomic layer deposition) at the SOFC cathode/electrolyte interface to allow a maximum adhesion of the thick cathode layer, was thoroughly analysed. The LSM cathode was deposited on the solid electrolyte by painting and sintered in air at 1200°C for 2 h. The morphological and structural analyses of the samples were performed by scanning electron microscopy and X-ray diffraction; their electrical properties were examined between 390 and 700°C by electrochemical impedance spectroscopy. The impedance responses showed three different contributions. The highfrequency arc is attributed to the YSZ electrolyte. The electrode processes associated with the medium- and low frequency arcs were discussed. The electrochemical performance was influenced by the microstructure at the electrode/electrolyte interface.
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