NDLI: Microstructure, Sinterability and Electrochemical Properties of a Sm-Sr-(Co,Fe,Ni)-O Cathode System for Solid Oxide Fuel Cells

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Baek, Seung-Wook Bae, Joongmyeon
Copyright Year	2009
Abstract	Samarium (Sm) is a rare earth material that shows promise for use in cathodes of intermediate temperature-operating solid oxide fuel cells (IT-SOFCs). Perovskite-structured oxide containing Sm has very attractive electrocatalytic properties, and spinel-structured oxide generally exhibits low thermal expansion, indicating its suitability for application as a SOFC cathode. In this paper, the characteristics of the various Sm-based oxide materials (Sm-Sr-(Co,Fe,Ni)-O) deposited on Sm0.2Ce0.8O1.9 (SDC) electrolyte pellets were investigated in terms of their microstructure, sinterability and electrochemical properties. The relationship between the composition and the sintering temperature was studied and discussed. Results show that the substitution of iron (Fe) and nickel (Ni) in Co-sites affects the sinterability, adhesion to the electrolyte and electrochemical activity, such that the different sintering temperatures for these compositions should be considered. The microstructure and sinterability of the cathodes were investigated using a scanning electron microscope (SEM). Area specific resistance (ASR) values for all cathode compositions were measured using AC electrochemical impedance spectroscopy (EIS).
Sponsorship	Advanced Energy Systems Division
Starting Page	889
Ending Page	895
Page Count	7
File Format	PDF
ISBN	9780791848814
DOI	10.1115/FuelCell2009-85141
e-ISBN	9780791838471
Conference Proceedings	ASME 2009 7th International Conference on Fuel Cell Science, Engineering and Technology
Language	English
Publisher Date	2009-06-08
Publisher Place	Newport Beach, California, USA
Access Restriction	Subscribed
Subject Keyword	Thermal expansion Solid oxide fuel cells Temperature Sintering Electrolytes Iron Nickel Samarium Scanning electron microscopes Adhesion Electrochemical impedance spectroscopy
Content Type	Text
Resource Type	Article

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