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La0.6Sr0.4Co0.2Fe0.8O3-δ-SDC carbonate composite cathodes for low-temperature solid oxide fuel cells

Abd Rahman, Hamimah and Muchtar, Andanastuti and Muhamad, Norhamidi and Abdullah, Huda (2013) La0.6Sr0.4Co0.2Fe0.8O3-δ-SDC carbonate composite cathodes for low-temperature solid oxide fuel cells. Materials Chemistry and Physics, 141. pp. 752-757. ISSN 02540584

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Abstract

Composite cathodes with La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF6428) and samarium-doped ceria carbonate (SDCC) were developed and investigated for solid oxide fuel cell (SOFC) applications at low operating temperatures. The LSCFeSDCC (50 wt% LSCF:50 wt% SDCC) composite cathode powders were mixed by the ball-milling technique followed by calcination at 700, 750, 800, and 850 °C for 2 h. To fabricate single SOFCs using LSCFeSDCC as the cathode, SDCC as the electrolyte, and NiOeSDCC as the anode, a singlestep pressing and co-firing process was employed. The electrolyte-supported button cells were tested between 475 and 550 °C. The composite cathode exhibited well-matched TEC values with the SDCC electrolyte. Calcination at lower temperatures (700 and 750 °C) produced powders with surface areas of 10 m2 g^-1-11 m2 g^-1. Using LSCFeSDCC powders sintered at 700 and 750 °C to fabricate button cells resulted in power densities of 117.9 and 120.4 mW cm^-2, respectively, at an operation temperature of 550 °C with the latter cathode yielding the lowest Rp value.

Item Type: Article
Uncontrolled Keywords: Composite materials; sintering; electrochemical properties; thermal expansion
Subjects: T Technology > TP Chemical technology > TP250-261 Industrial electrochemistry
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Materials Engineering and Design
Depositing User: Mr. Mohammad Shaifulrip Ithnin
Date Deposited: 18 Feb 2019 06:56
Last Modified: 04 Nov 2019 04:20
URI: http://eprints.uthm.edu.my/id/eprint/10666
Statistic Details: View Download Statistic

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