The Performance Improvement of a Thick Electrode Solid Oxide Fuel Cell

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• 作者：Penyarat Chinda
• 关键词：Surface Area ; Electrode Microstructure ; Microscopic Scale Models ; Solid Oxide Fuel Cells ; Thick-Anode
• 刊名：Energy Procedia
• 出版年：2013
• 出版时间：2013
• 年：2013
• 卷：34
• 期：Complete
• 页码：243-261
• 全文大小：1140 K

文摘

Solid oxide fuel cells (SOFCs) are becoming one of the main competitors among environmental friendly energy sources for the future due to low emission rates, high electrical generating efficiency and potential for low operating cost. This work presents systematic approach to develop and validate the microscopic scale models of a single cell SOFC supplied with humidified hydrogen. The model considers the common thick-anode supported SOFC in which the electrode microstructure is packed by spherical shaped ionic and electronic conducting particles. The evolution of performance versus electrode geometries is studied. The investigation confirms the strong effects of microstructure geometry to improve the SOFC performance, especially the increasing of the electrochemical active surface area. The largest active surface area of electrode is achieved when the size and solid volumetric fraction of ion and electron conducting particles are equal and then, the optimal thicknesses of the electrodes are also investigated. Finally, the accuracy of the model was validated by comparing with published experimental data.