Recebido em 4/4/06; aceito em 16/3/07; publicado na web em 17/7/07 DIRECTIONS OF THE INDUSTRIAL D... more Recebido em 4/4/06; aceito em 16/3/07; publicado na web em 17/7/07 DIRECTIONS OF THE INDUSTRIAL DEVELOPMENT OF THE SOLID OXIDE FUEL CELLS TECHNOLOGY. This manuscript shows an overview of the solid oxide fuel cell (SOFC) technology based on industrial developments. The information presented has been collected mostly at conferences that the authors attended. It is observed that several companies have been pursuing the development of the SOFC technology. Significant advances in stability and power density have raised the economic interest in this technology recently. It is revealed that the SOFC materials are essentially the same ones that have been used in the past decades, and that the two most important designs of pre-commercial SOFC prototypes are the tubular and planar ones.
The preparation of the ZrO 2 :8 mol % Y 2 O 3 /NiO ͑YSZ/NiO͒ composites by a modified liquid mixt... more The preparation of the ZrO 2 :8 mol % Y 2 O 3 /NiO ͑YSZ/NiO͒ composites by a modified liquid mixture technique is reported. Nanometric NiO particles dispersed over the yttria-stabilized zirconia ͑YSZ͒ were prepared, resulting in dense sintered specimens with no solid solution formation between the oxides. Such a feature allowed for the electrical characterization of the composites in a wide range of relative volume fraction, temperature, and oxygen partial pressure. The main results indicate that the composites have high electrical conductivity, and the transport properties in these mixed ionic-electronic ͑MIEC͒ composites are strongly dependent on the relative volume fraction of the phases, microstructure, and temperature. These parameters should hence be taken into consideration for the optimized design of MIEC composites for electrochemical applications. In this context, the composite was reduced under H 2 for the preparation of high-conductivity YSZ/Ni cermets for use as solid oxide fuel cell anode material with relatively low metal content.
Recebido em 4/4/06; aceito em 16/3/07; publicado na web em 17/7/07 DIRECTIONS OF THE INDUSTRIAL D... more Recebido em 4/4/06; aceito em 16/3/07; publicado na web em 17/7/07 DIRECTIONS OF THE INDUSTRIAL DEVELOPMENT OF THE SOLID OXIDE FUEL CELLS TECHNOLOGY. This manuscript shows an overview of the solid oxide fuel cell (SOFC) technology based on industrial developments. The information presented has been collected mostly at conferences that the authors attended. It is observed that several companies have been pursuing the development of the SOFC technology. Significant advances in stability and power density have raised the economic interest in this technology recently. It is revealed that the SOFC materials are essentially the same ones that have been used in the past decades, and that the two most important designs of pre-commercial SOFC prototypes are the tubular and planar ones.
The preparation of the ZrO 2 :8 mol % Y 2 O 3 /NiO ͑YSZ/NiO͒ composites by a modified liquid mixt... more The preparation of the ZrO 2 :8 mol % Y 2 O 3 /NiO ͑YSZ/NiO͒ composites by a modified liquid mixture technique is reported. Nanometric NiO particles dispersed over the yttria-stabilized zirconia ͑YSZ͒ were prepared, resulting in dense sintered specimens with no solid solution formation between the oxides. Such a feature allowed for the electrical characterization of the composites in a wide range of relative volume fraction, temperature, and oxygen partial pressure. The main results indicate that the composites have high electrical conductivity, and the transport properties in these mixed ionic-electronic ͑MIEC͒ composites are strongly dependent on the relative volume fraction of the phases, microstructure, and temperature. These parameters should hence be taken into consideration for the optimized design of MIEC composites for electrochemical applications. In this context, the composite was reduced under H 2 for the preparation of high-conductivity YSZ/Ni cermets for use as solid oxide fuel cell anode material with relatively low metal content.
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