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http://dx.doi.org/10.3365/KJMM.2012.50.9.685

Densification and Electrochemical Properties of YSZ Electrolyte Decalcomania Paper for SOFCs by Decalcomania  

Cho, Hae-Ran (Korea Institute of Ceramic Engineering & Technology, Energy Materials Center)
Choi, Byung-Hyun (Korea Institute of Ceramic Engineering & Technology, Energy Materials Center)
An, Yong-Tae (Korea Institute of Ceramic Engineering & Technology, Energy Materials Center)
Baeck, Sung-Hyeon (Inha University)
Roh, Kwang-Chul (Korea Institute of Ceramic Engineering & Technology, Energy Materials Center)
Park, Sun-Min (Korea Institute of Ceramic Engineering & Technology, Energy Materials Center)
Publication Information
Korean Journal of Metals and Materials / v.50, no.9, 2012 , pp. 685-690 More about this Journal
Abstract
Decalcomania is a new method for SOFCs (solid oxide fuel cells) unit cell fabrication. A tight and dense $5{\mu}m$ Yttria-stabilized zirconia (8YSZ) electrolyte layer on anode substrate was fabricated by the decalcomania method. After 8YSZ as the electrolyte starting material was calcined at $1200^{\circ}C$, the particle size was controlled by the attrition mill. The median particle size (D50) of each 8YSZ was $39.6{\mu}m$, $9.30{\mu}m$, $6.35{\mu}m$, and $3.16{\mu}m$, respectively. The anode substrate was coated with decalcomania papers which were made by using 8YSZ with different median particle sizes. In order to investigate the effect of median particle sizes and sintering conditions on the electrolyte density, each sample was sintered for 2, 5 and 10 h, respectively. 8YSZ with a median particle size of $3.16{\mu}m$ which was sintered at $1400^{\circ}C$ for 10 had the highest density. With this 8YSZ, a SOFCs unit cell was manufactured with a $5{\mu}m$ layer by the decalcomania method. Then the unit cell was run at $800^{\circ}C$. The Open Circuit Voltage (OCV) and Maximum power density (MPD) was 1.12 V and $650mW/cm^2$, respectively.
Keywords
SOFC; YSZ (Yttria-stabilized Zirconia); decalcomania; electrolyte densification; electrical properties;
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