Impact of Preparation Method and Y2O3 Content on the Properties of the YSZ Electrolyte

Energies

Veronika Rečková¹  Karel Bouzek¹  Michal Carda¹  Nela Adamová¹  Daniel Budáč¹  Martin Paidar¹ 

[1] Department of Inorganic Technology, Faculty of Chemical Technology, University of Chemistry and Technology, Prague, Technická 5, Prague 6—Dejvice, 166 28 Prague, Czech Republic;

关键词: solid oxide cells;    yttria-stabilized zirconia;    YSZ;    powder synthesis;    dopant content;    shape molding;   

DOI  :  10.3390/en15072565

来源: DOAJ

【 摘 要 】

This study is an effort to cover and interconnect multiple aspects of the fabrication of the yttria-stabilized zirconia (YSZ) from powder preparation to a solid electrolyte suitable for utilization in solid oxide cells. Thus, a series of YSZ electrolytes was prepared, differing in the content of the Y₂O₃ dopant and in the method of preparation. Combustion synthesis along with the thermal decomposition of precursors was used for YSZ powder synthesis with a dopant content of 8 to 18 mol.%. Post-synthesis treatment of the powder was necessary for achieving satisfactory quality of the subsequent sintering step. The morphology analyses of the YSZ powders and sintered electrolytes produced proved that small particles with a uniform size distribution are essential for obtaining a dense electrolyte. Furthermore, the conductivity of YSZ electrolytes with different Y₂O₃ contents was examined in the temperature range of 400 to 800 °C. The lowest conductivity was found for the sample with the highest Y₂O₃ content. The obtained results enable the preparation methods, YSZ powder morphology, and composition to be connected to the mechanical and electrochemical properties of the YSZ electrolyte. Thus, this study links every step of YSZ electrolyte fabrication, which has not been sufficiently clearly described until now.

【 授权许可】

Unknown