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Influence of sintering temperature on the polarization resistance of La0.6Sr0.4Co0.2Fe0.8O3-δ – SDC carbonate composite cathode

Baharuddin, Nurul Akidah and Muchtar, Andanastuti and Somalu, Mahendra Rao and S. A, Muhammed Ali and Abd Rahman, Hamimah (2016) Influence of sintering temperature on the polarization resistance of La0.6Sr0.4Co0.2Fe0.8O3-δ – SDC carbonate composite cathode. Ceramics - Silikáty, 60 (2). pp. 115-121. ISSN 08625468

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Abstract

The effects of sintering temperature of an LSCF-samarium-doped ceria carbonate (SDCC) cathode composite film on its polarization resistance (Rp) were evaluated in this study. An LSCF-SDCC composite cathode was prepared for cathode film development by electrophoretic deposition (EPD). The LSCF-SDCC composite cathode was prepared at 50:50 weight percentage ratio. An EPD suspension which is based on an organic aqueous solution was used, and a mixture of ethanol and deionized water was used as medium with poly diallyl dimethyl ammonium chloride (PDADMAC) as a dispersing agent. SDCC substrate was used, and EPD was performed on both sides. A symmetrical cell with cathode composite LSCFSDCC films on both sides of the substrate was subjected to sintering at five different temperatures (from 550°C to 750°C). A symmetrical cell was painted using silver paste before undergoing electrochemical performance test (air condition), in which the impedance, Z data, was measured. The effects of sintering temperature change on element content and film porosity were first investigated by energy-dispersive X-ray spectroscopy, field emission scanning electron microscopy, and J-image analysis. Ceramic-based cathode LSCF-SDCC that was sintered at 600°C exhibited the lowest Rp at a value of 0.68 Ω when operated at 650°C. This study proved that EPD has potential in developing IT-LT solid oxide fuel cell cathode components with high electrochemical performance in terms of Rp values.

Item Type: Article
Uncontrolled Keywords: Ceramic; microstructures; polarization resistance; sintering
Subjects: Q Science > QD Chemistry
Divisions: Faculty of Mechanical and Manufacturing Engineering > Department of Materials Engineering and Design
Depositing User: Mr. Mohammad Shaifulrip Ithnin
Date Deposited: 08 Aug 2018 07:47
Last Modified: 04 Nov 2019 03:57
URI: http://eprints.uthm.edu.my/id/eprint/8633
Statistic Details: View Download Statistic

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