Layered perovskite GdBa0·5Sr0·5CoCuO5+δ as cathode material for intermediate-temperature solid oxide fuel cells. (July 2014)

• Record Type: Journal Article
• Authors: Wang, B.; Long, G.; Ji, Y.; Pang, M.; Meng, X.
• Is Part Of: Materials research innovations. Volume 18(2014)Supplement 4
• Page Start: S4-128
• Page End: S4-131
• Publication Date: 2014-07
• Subjects: Solid oxide fuel cells Cathode GdBa0·5Sr0·5CoCuO5+δ Electrochemical performance; Materials -- Research -- Periodicals; Matériaux -- Recherche -- Périodiques; 620.1105
• DOI: 10.1179/1432891714Z.000000000670
• Languages: English
• ISSNs: 1432-8917

Abstract

Abstract : Layered GdBa0·5 Sr0·5 CoCuO5+ δ (GBSCCu) perovskite oxide is synthesised using an ethylenediaminetetraacetic acid (EDTA)–citrate combined method. Electrochemical performances are investigated as a novel cathode material for intermediate-temperature solid oxide fuel cells. The cathode GBSCCu chemical compatibility with Gd0·1 Ce0·9 O1·95 (GDC) electrolyte is examined below 950°C. The electrical conductivity value of the GBSCCu sample reaches a maximum of 147 Scm −1 at 750°C in air. The thermal expansion coefficient of the GBSCCu sample is 16·9×10 −6 K −1 between 30°C and 900°C. The polarisation resistance of GBSCCu on the GDC electrolyte is 0·102 Ω cm 2 at 800°C. The maximum power density of a single cell with a GBSCCu–GDC composite cathode on the 300 μm thick GDC electrolyte reaches 402 mW cm −2 . These results indicate that GBSCCu is a potential cathode material for GDC electrolyte intermediate-temperaturte solid oxide fuel cells(IT-SOFCs).