Conductivity improvement of Ce0.8Gd0.2O19 solid electrolyte
来源期刊：JOURNAL OF RARE EARTHS2009年第4期
论文作者：Maria Gazda Sebastian Molin Piotr Jasinski
Key words：rare earth; solid electrolyte; electrical properties; impedance spectroscopy; fuel cell; solid oxide fuel cells (SOFC);
Abstract: Solid oxide fuel cells based on doped ceria electrolytes offer operating temperatures of ～600 ℃.During recent years much attention was aimed at successful powder preparation with high sinter activity and high conductivity.The properties of ceria electrolyte are very sensitive to impurities introduced during powder and electrolyte fabrication.One of the most successful and commercially available processes for the production of clean powders is based on the addition of several percent metallic cations that will react with impurities and segnegate into the triple points of grain boundaries.In this work the results obtained from doping of CGO20 by 2% Ca and prepared by different routes were presented.The way of introducing Ca seemed to play an important role.
Maria Gazda1，Sebastian Molin2，Piotr Jasinski2
(1.Faculty of Applied Physics and Mathematics,Gdansk University of Technology,ul.Narutowicza 11/12,80-952 Gdansk,Poland;
2.Faculty of Electronics,Telecommunications and Informatics,Gdansk University of Technology,ul.Narutowicza 11/12,80-952 Gdansk,Poland)
Abstract:Solid oxide fuel cells based on doped ceria electrolytes offer operating temperatures of ～600 ℃.During recent years much attention was aimed at successful powder preparation with high sinter activity and high conductivity.The properties of ceria electrolyte are very sensitive to impurities introduced during powder and electrolyte fabrication.One of the most successful and commercially available processes for the production of clean powders is based on the addition of several percent metallic cations that will react with impurities and segnegate into the triple points of grain boundaries.In this work the results obtained from doping of CGO20 by 2% Ca and prepared by different routes were presented.The way of introducing Ca seemed to play an important role.
Key words:rare earth; solid electrolyte; electrical properties; impedance spectroscopy; fuel cell; solid oxide fuel cells (SOFC);
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