Co-Cu-YSZ-GDC as an anode material for internal reforming SOFC?

Kumar, SS and Jayaram, V and Ojha, PK and Badi, SP and Aruna, ST (2018) Co-Cu-YSZ-GDC as an anode material for internal reforming SOFC? In: Nanomaterials and Energy, 7 (2). pp. 44-51.

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Abstract

A solid oxide fuel cell (SOFC) is a fuel-flexible device, and, apart from using pure hydrogen, it can utilize carbon monoxide, methane or any other higher hydrocarbons. Moreover, it can tolerate some degree of common fossil fuel impurities, such as ammonia and chlorides. It can even utilize the biogas derived from decomposable waste. However, the propensity of the state-of-the-art anode (nickel (Ni)-yttria-stabilized zirconia (YSZ)) toward carburization limits the ability of SOFCs to realize such a goal. In an attempt to develop a carbon-resistant anode system, the present work explores the carburization studies of a cobalt (Co)-copper (Cu) bimetallic anode system and fabrication of a cobalt-copper-YSZ-gadolinia-doped ceria (GDC) anode composite. The effect of alloying cobalt with copper and addition of rare-earth oxide on carburization has also been studied in detail. The anode composition was characterized for crystal structure, microstructure and redox stability. Using the optimized anode composition, SOFC single cells have been fabricated and their electrical and electrochemical performances have been evaluated. The investigated Co0.9Cu0.1YSZ0.95GDC0.05 anode has undergone severe agglomeration during the fabrication and operation of the cell, which resulted in inferior performance. The surface-segregated copper acted as a poor catalyst for hydrocarbon oxidation. © 2018 ICE Publishing: All rights reserved.

Item Type:	Journal Article
Publication:	Nanomaterials and Energy
Publisher:	ICE Publishing
Additional Information:	The copyright for this article belongs to ICE Publishing
Keywords:	Ammonia; Anodes; Carbon monoxide; Cerium oxide; Chemical analysis; Chlorine compounds; Cobalt; Copper; Crystal impurities; Crystal structure; Fossil fuels; Fuel cells; Hydrocarbon refining; Hydrocarbons; Rare earths; Yttria stabilized zirconia; Yttrium metallography; Yttrium oxide; Zirconia, Anode composition; Electrochemical performance; Gadolinia doped ceria; Higher hydrocarbons; Hydrocarbon oxidation; Internal reforming sofc; Material processing; Yttria-stabilized zirconias (YSZ), Solid oxide fuel cells (SOFC)
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	20 May 2022 11:36
Last Modified:	25 May 2022 05:34
URI:	https://eprints.iisc.ac.in/id/eprint/71707

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