Properties of bias-assisted sputtered gadolinia-doped ceria interlayers for solid oxide fuel cells

Abstract

a b s t r a c tThe growth and electrochemical properties of gadolinia-doped ceria (GDC) interlayers deposited by biasassisted magnetron sputtering in solid oxide fuel cells have been investigated. Such interlayers act as diffusion barriers to protect the yttria-stabilized zirconia electrolyte, preventing possible degradation when mixed ionic-electronic conductor (La,Sr)(Co,Fe)O 3−ı is used as the cathode. The dependence of the applied bias during the sputtering deposition on both the interlayer microstructure and fuel cell performance has been studied in anode-supported single cells. The main experimental results showed that bias-assisted sputtering of GDC interlayers produced microstructures denser than those of unbiased depositions, which resulted in increased electrochemical properties of fuel cells.

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“…Such initiatives started in 2002 with PROCaC (now ProH 2 ) by MCT (Ministry of Science and Technology) and some companies (e.g. Petrobras) resulting in a gain of expertise by some groups in the country [46][47][48][49][50][51][52][53].…”