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Studying on the increasing temperature in IT-SOFC:Effect of heat sources

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2007年第9期8卷 1500-1504页

作者： ZITOUNI Bariza BEN MOUSSA Hocine oulmi kafia Laboratore d'étude des Systèmes énergétiques Industriels (LESEI) Faculty of EngineeringUniversity of BatnaBatnaAlgeria Laboratoire de Chimie et de Chimie de L'environnement Faculty of ScienceUniversity of BatnaBatnaAlgeria

The dimensions and the materials type limit the performance of fuel cell. The increase of the temperature in electrodes and electrolyte of the cell,is due to the over potential of activation (transfer of load),the over potential Ohmic (resistance of polarization),the over potential of reaction (heat released by the chemical reaction) and the over potential of diffusion. In this paper,we studied the thermo-electrical performance of an intermediate temperature solid oxide fuel cell (IT-SOFC) with electrode supported. The aim of this work is to study this increasing temperature of a single cell of an IT-SOFC under the influence of the following parameters: heat sources,functioning temperature and voltages of the cell,geometric configuration and materials type. The equation of energy in one dimension is numerically resolved by using the method of finite volumes. A computing program (FORTRAN) is developed locally for this purpose in order to obtain fields of temperature in every element of the cell.

关键词： IT-SOFC Thermo-electrical Joule effect Activation energy Temperature Voltage Geometric configuration

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Physical Properties of the Cathode Materials in Fuel Cells

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Journal of Environmental Science and Engineering(B) 2012年第2期1卷 187-193页

作者： Abdelmadjid Temagoult kafia oulmi Laboratory of lndustrial Energy Systems （LESEI） Mechanical Department Faculty of Engineering Sciences University of BatnaBatna 05000 Algeria Laboratory of Chem＆try and Environmental Chemistry （LCCE） Faculty of Science University of Batna Batna 05000 Algeria.

The materials used in fuel cells are currently the subject of much research, particularly those of the cathode which is a key element for the different functions that it provides. In our work the authors became interested in the different materials used for the cathode, which are usually ceramic, and some of their physical properties between different electrical conductivity （electronic, ionic）, the coefficient of thermal expansion and chemical compatibility between different materials used in the stack. Not to mention, however, the various parameters that influence these properties, such as structure, the sintering temperature, dope, and the operating temperature of the battery. The main objective of research in this area is to improve battery performance by researching new materials and new manufacturing technologies that will increase the electrical conductivity while trying to lower the temperature operating the latter as much as possible while keeping it above 650℃, In doing so, the longevity of the battery will be increased which will have a direct impact on manufacturing costs of the battery, and thus greater use thereof.

关键词： Ceramic fuel cell cathode electrical conductivity thermal expansion.

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