All Symmetrical Metal Supported Solid Oxide Fuel Cells
Autor: | Wang Shao-Rong, Zhou Yu-Cun, YE Xiao-feng |
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Rok vydání: | 2016 |
Předmět: |
Materials science
Oxide Nanotechnology 02 engineering and technology Electrolyte 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences Cathode 0104 chemical sciences law.invention Anode Inorganic Chemistry chemistry.chemical_compound chemistry Chemical engineering law Hydrogen fuel General Materials Science Solid oxide fuel cell 0210 nano-technology Polarization (electrochemistry) |
Zdroj: | Journal of Inorganic Materials. 31:769 |
ISSN: | 1000-324X |
DOI: | 10.15541/jim20150610 |
Popis: | Metal-supported solid oxide fuel cells (MS-SOFCs) have many advantages like low materials cost, excellent structural stability and high tolerance toward rapid thermal cycling over the traditional all ceramic SOFCs. To facilitate the commercialization of SOFCs, an all symmetrical MS-SOFC with the structure of Ce0.8Sm0.2O2-δ (SDC)-430L anode/Zr0.88Sc0.22Ce0.01O2.12(SSZ) electrolyte/SDC-430L cathode was developed by a tape castingsintering-infiltration method. When measured in humidified hydrogen fuel and air oxidant, the maximum power densities (MPD) of the fuel cell are 220, 250 and 280 mW/cm at 600, 650 and 700°C, respectively. Electrochemical impedance spectra measurement shows that the cell performances are primarily dominated by polarization resistances derived from the SDC-430L electrodes. The pure ohmic resistances are 0.16, 0.21 and 0.29 Ωcm and the polarization resistances are 0.67, 0.90 and 1.22 Ωcm at 700, 650 and 600°C, respectively. Compared with that of the anode, polarization resistance of cathode is much higher. When measured at 650°C, polarization resistances of the symmetrical SDC-430L cell are 0.23 and 1.92 Ωcm in 3%H2O-97%H2 and air, respectively. Further optimizing the cell structure (e.g., applying a finer 430L backbone) and the catalyst materials (e.g., Ag, Pt containing composite materials) may enhance the electrochemical performances of such MS-SOFC. 770 无 机 材 料 学 报 第 31卷 |
Databáze: | OpenAIRE |
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