Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2018)
    Energy Harvesting & Storage Wednesday Sessions
       Session EH-WeM

Paper EH-WeM4
Fabrication of Free-standing Thin Film by Injecting Polymer into Porous Substrate for Thin Film Solid Oxide Fuel Cells

Wednesday, December 5, 2018, 9:00 am, Room Naupaka Salon 5

Session: Efficient Power Conversion/Cells
Presenter: Yusung Kim, Seoul National Univeristy, Republic of Korea
Authors: Y. Kim, Seoul National Univeristy, Republic of Korea
S.W. Cha, Seoul National Univeristy, Republic of Korea
W. Yu, Seoul National Univeristy, Republic of Korea
W. Jeong, Seoul National Univeristy, Republic of Korea
J.H. So, Seoul National Univeristy, Republic of Korea
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Free standing thin films were fabricated by injecting polymer into porous substrate for thin film solid oxide fuel cells(TF-SOFCs). To apply thin film on porous substrate with pores of more than 1 micrometer, anode functional layer(AFL) is needed to reduce pore size. However, it is difficult to supply gas when the AFL is thickened due to the reduced pore size and porosity. To solve this problem, free standing under 1 micrometer thin film AFL was fabricated on a porous support. Based on the Si-based free standing thin film sofc, which is a field of TF-SOFCs, the pores of the porous NiO-YSZ support were blocked through injecting polystyrene, the NiO-YSZ thin film was deposited thereon, and the polystyrene was removed to make the free-standing thin film by pyrolysis. The pore blocking through the polymer was obviously a major influence on the thin film covering the pore. On the other hand, since the pore size of the support is about 10 μm, the pore size is not reduced when the thin film is deposited without pore blocking. In the process of melting and solidifying into a liquid to insert the polymer, a nanoscale gap was created due to the volume change due to the phase change, and the thin film deposited thereon also has this shape. Also it is verified that the NiO-YSZ thin film was successfully fabricated on the porous NiO-YSZ substrate by FIB-SEM analysis.