ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 60, (2) 115 - 121 (2016)


INFLUENCE OF SINTERING TEMPERATURE ON THE POLARIZATION RESISTANCE OF LaO20.6SrO20.4CoO20.2FeO20.8O3-δ - SDC CARBONATE COMPOSITE CATHODE
 
Baharuddin Nurul Akidah 1, Muchtar Andanastuti 1, Somalu Mahendra Rao 1, Ali S.A. Muhammed 1, Rahman Hamimah A. 2
 
1 Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
2 Faculty of Mechanical and Manufacturing Engineering, Universiti Tun Hussein Onn Malaysia, 86400 Batu Pahat, Johor, Malaysia

Keywords: Ceramic, Microstructures, Polarization resistance, Sintering
 

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 LSCF-SDCC 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.


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doi: 10.13168/cs.2016.0017
 
 
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