Electrochemical Performance and Carbon-Tolerance of La0.75Sr0.25Cr0.5Mn0.5O3 Ce0.9Gd0.1O1.95 Composite Anode for Solid Oxide Fuel Cells (SOFCs)
- Electrochemical Performance and Carbon-Tolerance of La0.75Sr0.25Cr0.5Mn0.5O3 Ce0.9Gd0.1O1.95 Composite Anode for Solid Oxide Fuel Cells (SOFCs)
- 김정희; 이지흔; 신동욱; 이종흔; 김혜령; 이종호; 이해원; 윤경중
- Issue Date
- 10th European SOFC Forum
- VOL 8, NO A1013, 121-125
- Solid oxide fuel cells (SOFCs) with all-ceramic anodes have gained considerable interest because they offer attractive features such as resistance to coking, reduction-oxidation (redox) stability, and tolerance to sulfur. In this work, the La0.75Sr0.25Cr0.5Mn0.5O3 (LSCM) - Ce0.9Gd0.1O1.95 (GDC) composite was evaluated for potential use as the ceramic SOFC anode. The LSCM-GDC composite powder was synthesized by particle-dispersed glycinenitrate process (GNP). The crystal structure, phase purity, and chemical stability of the composite powder under the processing and operating conditions were verified using Xray diffraction (XRD) analysis. The electrode performance was characterized by impedance analysis on symmetric cells under hydrogen and methane environments. The electrolyte-supported cells with YSZ electrolyte and (La0.7Sr0.3)0.95MnO3 (LSM) / YSZ composite cathode were fabricated, and the performance was evaluated at 700~850oC with humidified H2 and CH4 as fuel and air as oxidant. The infiltration effect of the nanoscale ruthenium catalysts on the performance of the ceramic anode was investigated under various operating conditions.
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