전사법으로 제조한 SOFC용 YSZ 전해질 전사지의 치밀화 및 전기화학적 특성

• Published in: 대한금속·재료학회지, 50(9) Vol. 50; no. 9; pp. 685 - 690
• Main Authors: 조해란, Hae Ran Cho, 최병현, Byung Hyun Choi, 안용태, Yong Tae An, 백성현, Sung Hyeon Baeck, 노광철, Kwang Chul Roh, 박선민, Sun Min Park
• Format: Journal Article
• Language: Korean
• Published: 대한금속재료학회 20.09.2012; 대한금속·재료학회
• Subjects: decalcomania; electrical properties; electrolyte densification; SOFC; YSZ; Yttria-stabilized Zirconia; 재료공학
• ISSN: 1738-8228; 2288-8241
• DOI: 10.3365/KJMM.2012.50.9.685

Decalcomania is a new method for SOFCs (solid oxide fuel cells) unit cell fabrication. A tight and dense 5 ㎛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℃, the particle size was controlled by the attrition mill. The median particle size (D50) of each 8YSZ was 39.6 ㎛, 9.30 ㎛, 6.35 ㎛, and 3.16 ㎛, 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 ㎛which was sintered at 1400℃ for 10 had the highest density. With this 8YSZ, a SOFCs unit cell was manufactured with a 5 ㎛layer by the decalcomania method. Then the unit cell was run at 800℃. The Open Circuit Voltage (OCV) and Maximum power density (MPD) was 1.12 V and 650 mW/cm2, respectively.