The increasing world population and the need to improve quality of life for a large percentage of human beings are the driving forces for the search for sustainable energy productions systems, alternative to fossil fuel combustion. Among the various types of alternative energy production technologies, solid oxide fuel cells (SOFCs) operating at intermediate temperatures (400??700 1C) show the advantage of possible use both for stationary and mobile energy production. To reach the goal of reducing the SOFC operating temperature, proton-conducting oxides are gaining wide interest as electrolyte materials. Fuel cells, electrochemical devices that allow the direct conversion of chemical energy into electrical energy, have received growing interest in recent years since they represent one of the most promising and e??cient energy-production systems to reduce pollutant emissions.
Solid oxide fuel cells (SOFC) are promising devices for high efficiency cogeneration. The most widely used and studied ones have an anion conducting electrolyte that requires high operating temperatures to limit ohmic losses across this electrolyte; temperatures typically range between 800 and 1,000 °C. This temperature is associated with undesirable phenomena such as material interaction and insulating phase formation that result in unsatisfactory durability and high cost for market entry. Proton conducting solid oxide fuel cells (PCFC) constitutes a promising alternative since they allow a significant decrease in operating temperature. The Ba(Zr,Ce,Ln)O3??δ perovskite family exhibits ionic conductivities reaching 10??4 to 10??3 S cm??1 at temperatures as low as 600??700 °C, these values being obtained with anion conducting SOFC between 700 and 1,000 °C.
In this work a new Indium doped BaZr0.8Y0.2-xInxO3- perovskite proton conductor was examined to obtain a high total conductivity in the wet atmosphere. The total conductivity of BZIY5 in wet Ar/10%H2 was 1.83E-03S/cm at 500°C which is larger than the values reported for BZY sintered with other metal oxides. Since no group reported such structure, we want to examine the doping saturating point of BZY to Indium, electrical characteristic and microscopic morphology.
The increasing world population and the need to improve quality of life for a large percentage of human beings are the driving forces for the search for sustainable energy productions systems, alternative to fossil fuel combustion. Among the various types of alternative energy production technologies, solid oxide fuel cells (SOFCs) operating at intermediate temperatures (400??700 1C) show the advantage of possible use both for stationary and mobile energy production. To reach the goal of reducing the SOFC operating temperature, proton-conducting oxides are gaining wide interest as electrolyte materials. Fuel cells, electrochemical devices that allow the direct conversion of chemical energy into electrical energy, have received growing interest in recent years since they represent one of the most promising and e??cient energy-production systems to reduce pollutant emissions.
Solid oxide fuel cells (SOFC) are promising devices for high efficiency cogeneration. The most widely used and studied ones have an anion conducting electrolyte that requires high operating temperatures to limit ohmic losses across this electrolyte; temperatures typically range between 800 and 1,000 °C. This temperature is associated with undesirable phenomena such as material interaction and insulating phase formation that result in unsatisfactory durability and high cost for market entry. Proton conducting solid oxide fuel cells (PCFC) constitutes a promising alternative since they allow a significant decrease in operating temperature. The Ba(Zr,Ce,Ln)O3??δ perovskite family exhibits ionic conductivities reaching 10??4 to 10??3 S cm??1 at temperatures as low as 600??700 °C, these values being obtained with anion conducting SOFC between 700 and 1,000 °C.
In this work a new Indium doped BaZr0.8Y0.2-xInxO3- perovskite proton conductor was examined to obtain a high total conductivity in the wet atmosphere. The total conductivity of BZIY5 in wet Ar/10%H2 was 1.83E-03S/cm at 500°C which is larger than the values reported for BZY sintered with other metal oxides. Since no group reported such structure, we want to examine the doping saturating point of BZY to Indium, electrical characteristic and microscopic morphology.
