Electrochemical performance of sol-gel derived La0.6S0.4CoO3-δ cathode material for proton-conducting fuel cell: A comparison between simple and advanced cell fabrication techniques
| Autor: | Wan Nor Anasuhah Wan Yusoff, Nafisah Osman, Abdullah Samat, Nurul Akidah Baharuddin, Andanastuti Muchtar, Mahendra Rao Somalu |
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| Rok vydání: | 2018 |
| Předmět: |
Fabrication
Materials science 02 engineering and technology Electrochemistry 01 natural sciences law.invention lcsh:TP785-869 law 0103 physical sciences polarization resistance SOFC Porosity Sol-gel 010302 applied physics brush painting screen printing 021001 nanoscience & nanotechnology LSC cathode Cathode Dielectric spectroscopy lcsh:Clay industries. Ceramics. Glass Chemical engineering Screen printing Ceramics and Composites Slurry 0210 nano-technology |
| Zdroj: | Processing and Application of Ceramics, Vol 12, Iss 3, Pp 277-286 (2018) |
| ISSN: | 2406-1034 1820-6131 |
| Popis: | In this study, the effects of different fabrication techniques on the electrochemical performance of solgel derived La0.6Sr0.4CoO3-δ (LSC) cathode material for intermediate temperature proton-conducting fuel cells were investigated. Single-phase, sub-micron LSC powder was used to prepare cathode slurries by a simple grinding-stirring (G-S) technique and an advanced ball milling-triple roll milling (BM-TRM) technique. The prepared G-S and BM-TRM cathode slurries were brush painted and screen printed, respectively, onto separate BaCe0.54Zr0.36Y0.1O2.95 (BCZY) proton-conducting electrolytes to fabricate symmetrical cells of LSC|BCZY|LSC. The thickness of LSC cathode layer prepared by brush painting and screen printing was 17 ± 0.5 μm and 7 ± 0.5 μm, and the surface porosity of the layers was 32% and 27%, respectively. Electrochemical impedance spectroscopy analysis revealed that the layer deposited by screen printing had lower area specific resistance measured at 700°C (0.25Wcm2) than the layer prepared by brush painting of G-S slurry (1.50Wcm2). The enhanced LSC cathode performance of the cell fabricated using BM-TRM assisted with screen printing is attributed to the improved particle homogeneity and network in the prepared slurry and the enhanced particle connectivity in the screen printed film. |
| Databáze: | OpenAIRE |
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