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Stora Höga, Sweden

Stingaciu M.,University of Stockholm | Zhu B.,KTH Royal Institute of Technology | Singh M.,GETT Fuel Cell AB | Johnsson M.,University of Stockholm
RSC Advances | Year: 2012

Porous single-component fuel cells, made up of a single layer of mixed ionic and electronic conductivity, have been fabricated using spark plasma sintering (SPS) and their performances were tested in methanol. It was possible to optimize the current/power output by changing the sintering conditions which directly influence the grain size, porosity, grain contacts and conducting paths for the fabricated cells. © 2012 The Royal Society of Chemistry. Source


Raza R.,KTH Royal Institute of Technology | Raza R.,COMSATS Institute of Information Technology | Zhu B.,KTH Royal Institute of Technology | Zhu B.,GETT Fuel Cell AB | Fransson T.H.,KTH Royal Institute of Technology
Journal of Fuel Cell Science and Technology | Year: 2011

Recent research results show that homogeneity and microstructure are very important parameters for the development of low cost materials with better performance for fuel cell applications. This research effort has been contributed in the development of low temperature solid oxide fuel cell (LTSOFC) material and technology as well as applications for polygeneration. The microstructure and electrochemical analyses were conducted. We found a series of new electrode materials which can run solid oxide fuel cell at 300-600°C range with high performances, e.g., a high power density output of 980 mW cm -2 was obtained at 570°C. The fuel cell electrodes were prepared from metal oxide materials through a solid state reaction and then mixed with doped ceria. The obtained results have many advantages for the development of LTSOFCs for polygeneration. The nanostructure of the anode has been studied by high-resolution electron microscopy, the crystal structure and lattice parameters have also been studied by X-ray diffraction. The electrical conductivity of the composite anode was studied by electrochemical impedance spectra. Copyright © 2011 by ASME. Source


Imran S.K.,KTH Royal Institute of Technology | Raza R.,KTH Royal Institute of Technology | Raza R.,COMSATS Institute of Information Technology | Abbas G.,KTH Royal Institute of Technology | And 2 more authors.
Journal of Fuel Cell Science and Technology | Year: 2011

Bio-ethanol based fuel cell is an energy source with a promising future. The low temperature solid oxide fuel cell fed by direct bio-ethanol is receiving considerable attention as a clean and highly efficient for the production of both electricity and high grade waste heat. The comparison of fuel cell performance with different metal-oxide based electrodes was investigated. The power densities of 584 mW cm -2 and 514 mW cm -2 at 520 °C and 570 °C respectively were found. The effect of electrode catalyst function, ethanol concentration on the electrical performance was investigated at different temperature ranged in between 300 °C-600 °C. The effect of deposited carbon on the electrode was investigated by energy-dispersive X-ray spectroscopy and scanning electron microscope after testing the cell with bio-ethanol. © 2011 American Society of Mechanical Engineers. Source


Raza R.,KTH Royal Institute of Technology | Raza R.,COMSATS Institute of Information Technology | Zhu B.,KTH Royal Institute of Technology | Zhu B.,GETT Fuel Cell AB | Fransson T.H.,KTH Royal Institute of Technology
Journal of Fuel Cell Science and Technology | Year: 2011

Recent research results show that homogeneity and microstructure are very important parameters for the development of low cost materials with better performance for fuel cell applications. This research effort has been contributed in the development of low temperature solid oxide fuel cell (LTSOFC) material and technology as well as applications for polygeneration. The microstructure and electrochemical analyses were conducted. We found a series of new electrode materials which can run solid oxide fuel cell at 300-600°C range with high performances, e.g., a high power density output of 980 mW cm -2 was obtained at 570°C. The fuel cell electrodes were prepared from metal oxide materials through a solid state reaction and then mixed with doped ceria. The obtained results have many advantages for the development of LTSOFCs for polygeneration. The nanostructure of the anode has been studied by high-resolution electron microscopy, the crystal structure and lattice parameters have also been studied by X-ray diffraction. The electrical conductivity of the composite anode was studied by electrochemical impedance spectra. © 2011 American Society of Mechanical Engineers. Source


Raza R.,KTH Royal Institute of Technology | Raza R.,COMSATS Institute of Information Technology | Zhu B.,KTH Royal Institute of Technology | Zhu B.,GETT Fuel Cell AB
Journal of Nanoscience and Nanotechnology | Year: 2011

Microwave sintering is a very interesting subject, which provides an alternative method to overcome problems faced with conventional sintering. This process is very efficient and only requires a few minutes. In this paper, nanocomposite electrodes (Cu 0.15Ni 0.85-GDC) were sintered at 700 °C for 10 mins in a single mode 2.45 GHz microwave oven by the solid state reaction method. The composition influence and the sintering methods on the as-obtained powder were characterized by XRD, SEM and TEM. It was observed that excellent sintering took place. Excellent fuel cell performance was achieved with microwave sintering compared to samples sintered using conventional sintering. Electrochemical analysis was carried out using AC Impedance technique. This paper reports a new approach to develop a microwave sintered based nanocomposite material, which is more efficient on time and energy. This method can gain significant economical benefits compared to conventional sintered materials for applications in low temperature solid oxide fuel cells (LTSOFC). Copyright © 2011 American Scientific Publishers. Source

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