Microstructure driven design of porous electrodes for molten carbonate fuel cell application: Recent progress
| Autor: | Jarosław Milewski, Aleksandra Lysik, S. Haj Ibrahim, Wen Xing, Choong-Gon Lee, Karol Cwieka, Tomasz Wejrzanowski, Jakub Skibinski |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Capillary action Energy Engineering and Power Technology 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Cathode 0104 chemical sciences law.invention Fuel Technology law Volume fraction Molten carbonate fuel cell Composite material 0210 nano-technology Porosity Power density |
| Zdroj: | International Journal of Hydrogen Energy. 45:25719-25732 |
| ISSN: | 0360-3199 |
| Popis: | This paper presents progress in development of microstructure in MCFC electrodes. Within these studies the influence of microstructure parameters of materials, such as porosity and pore size distribution on the fuel cell power density is analyzed using pure nickel. The results indicate that the optimal range of porosity for MCFC electrodes can be related with specific surface area, which reveals maximum for volume fraction of pores being 55–60%. The porosity of the cathode should be 5–10% higher due to in situ oxidation taking place during the startup procedure. Pore size distribution, PSD, was found to be especially important in MCFC, where liquid electrolyte infiltrates electrodes by capillary action. Through the application of specific porogens, multimodal PSD can be obtained, which significantly enhances reference cell power density. Optimization of basic microstructure parameters informed the design of a new concept MCFC cathode incorporating bi-layered materials, where each layer is appointed a different role. The application of commercial nickel foam as the gas side layer of the cathode increased power density and reduced the brittleness of the element, which is of key importance from the technological point of view. |
| Databáze: | OpenAIRE |
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