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:Number 4(2014)
• Page Start: 128
• Page End: 131
• Publication Date: 2014-07
• Subjects: Materials -- Research -- Periodicals; Matériaux -- Recherche -- Périodiques; 620.1105
• DOI: 10.1179/1432891714Z.000000000670
• Languages: English
• ISSNs: 1432-8917

Abstract

<abstract> <title> <x content-type="archive" xml:space="preserve">Abstract</x> </title> <p>Layered GdBa_0·5Sr_0·5CoCuO_{5+<italic>δ</italic>}(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 Gd_0·1Ce_0·9O_1·95 (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 cm² 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).</p> </abstract>