Research on Sealing and Cell of Planar Solid Oxide Fuel Cell

• Main Authors: Xuan-Vien Nguyen, 阮春圓
• Other Authors: Ay-Su
• Format: Others
• Language: en_US
• Online Access: http://ndltd.ncl.edu.tw/handle/88512391713908657669

碩士 === 元智大學 === 先進能源碩士學位學程 === 102 === In this thesis, the study presents two sections including research on seal and cell of planar solid oxide fuel cell. First section, anode-supported planar solid oxide fuel cells (SOFCs) with dimension 5 x 5 cm² have been successfully fabricated a multilayer tape compressing and co-firing procedure. Anode tapes NiO/YSZ =30 wt%/70 wt% with thickness =180 μm, NiO/YSZ = 30 wt%/70 wt% with thickness = 20 μm, and 8 mol% YSZ with thickness =15~20 μm were used as materials of anode substrate, anode functional layer, and electrolyte layer. After tape compressing, the anode-supported electrolyte tapes were co-sintered at 1400ºC, and 1450ºC, for 5 hours in air. After that, (La, Sr)MnO3 (LSM) paste was coated on the anode- electrolyte tapes surface and sintered at 1200ºC for 2 hours in air. The effect of pressure on cell flatness was investigated in 1386 Pa, 1742 Pa, and 2222 Pa, and the flatness of the anode-electrolyte tape is 629 µm/6 cm, 258 µm/6cm, and 250 µm/6 cm, respectively. Beside, the effect of the anode layer thickness on cell flatness was also investigated in thickness of 360 µm, 540 µm, and 720 µm. The curve of 2 anode layers (360 µm) is the bigger than the curve of 3 anode layers (540 µm), and 4 anode layers (720 µm). The flatness of anode-electrolyte tape (2 anode layers) is 926 µm/6 cm, the flatness of anode-electrolyte tape (3 anode layers) is 757 µm/6 cm, and the flatness of anode-electrolyte tape (4 anode layers) is 258 µm/6 cm, respectively. Second section, the comparison of sealing materials (mica paper, flexible mica paper, and thermiculite 866) have been investigated in 600°C, 700°C, 800°C, 900°C, and 1000°C for 96 hours. The porosity of mica paper increased very fast from 600°C to 1000°C. Its porosity increased from 28.3% to 58.09% within 400°C. Beside, the porosity of flexible mica paper is higher than the porosity of mica paper. The porosity of flexible mica paper increased from 30.28% to 58.68% at 600°C to 1000°C, respectively. Meanwhile the porosity of thermiculite 866 has a little change, its porosity changed from 8.58% to 22.88% at 600°C to 1000°C, respectively.