Low Temperature Cathode Supported Electrolytes. Report for April 1, 2001-September 30, 2001.

Anderson, H. U. ; Huebner, W.

Technical Information Center Oak Ridge Tennessee

关键词: Yttrium oxides;    Zirconium oxides;    Cathodes;    Annealing;    Cerium oxides;   

RP-ID  :  DE2004834069

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

This project has three main goals: Thin Films Studies, Preparation of Graded Porous Substrates and Basic Electrical Characterization and testing of Planar Single Cells. In this portion of study we have focused on producing YSZ films on porous LSM substrates. When using the polymer precursor there are a number of obstacles to overcome in order to form dense electrolyte layers on porous substrates (cathode or anode). Probably the most difficult problems are: (1) Extreme penetration of the polymer into the substrate must be prevented. (2) Shrinkage cracking must be avoided. (3) Film thickness in the 1 to 5(micro)m range must be achieved. We have demonstrated that cracking due to shrinkage involved during the elimination of solvents and organic matter and densification of the remaining oxide is not a problem as long as the resulting oxide film is < (approx) 0.15 (micro)m in thickness. We have also shown that we can make thicker films by making multiple depositions if the substrate is smooth (roughness (le) 0.1 (micro)m) and contains no surface pores > 0.2 (micro)m.