| 학회 | 한국재료학회 |
| 학술대회 | 2014년 가을 (11/27 ~ 11/28, 대전컨벤션센터) |
| 권호 | 20권 2호 |
| 발표분야 | C. 에너지/환경 재료(Energy and Environmental Materials) |
| 제목 | Electrochemically Deposited CeO2 Structures for Advanced Solid Oxide Fuel Cells |
| 초록 | A main advantage of solid oxide fuel cells (SOFCs) operating at a high temperature (＞ 650C) is their fuel flexibility, especially the possibility of utilizing methane and other hydrocarbon fuels. Unfortunately, however, the state-of-the-art SOFC anode, composed of nickel and an aniodically conducting oxide such as yttria-stabilized zirconia (YSZ), significantly suffers from Ni-catalyzed carbon deposition and resulting degradation of anode performance. Here, we address these issues through application of a simple, cost-effective ceramic coating method ― cathodic electrochemical deposition (CELD). Samaria-doped ceria (SDC) was chosen as a material to be coated on Ni surfaces due to its high chemical stability against carbon formation, high electronic and ionic conductivities, and favourable electrocatalytic activity toward fuel oxidation reaction. Nanostructured SDC layers with high surface area were successfully obtained. Significantly enhanced electrode resistance and coking stability were obtained by AC impedance spectroscopy (ACIS) measurements under wet methane fuel (2% H2O) at 650C with well-defined Ni patterned YSZ symmetric cells (anode/electrolyte/anode). The implications of these results for cost-effective, scalable and high performance SOFC anodes running on hydrocarbon fuels will be discussed. |
| 저자 | 최윤석, 정우철 |
| 소속 | 한국과학기술원(KAIST) |
| 키워드 | Solid Oxide Fuel Cell; Carbon Coking; Electrochemical Deposition |
