Electrochemical Performance of La_0.7Sr_0.3Cu_1-xFe_xO_3-δ as Cathode Material in IT-SOFCs

Abstract:

To obtain more detail information about the cathode of La0.7Sr0.3Cu1-xFexO3-δ（x= 0.1,0.3,0.5,0.7,0.9）in IT-SOFCs, the cathode material La0.7Sr0.3Cu1-xFexO3-δ（x=0.1, 0.3, 0.5, 0.7, 0.9）was synthesized by a sol-gel method. X-ray diffraction revealed it to be form a single phase of perovskite. The high temperature electrical conductivity was measured by using the four-point dc technique, and cathodic overpotential with SDC（Sm0.15Ce0.85O1.925） electrolyte support was measured by using a current-interruption technique. The investigation of electrocheimical properties suggested that La0.7Sr0.3Cu0.7Fe0.3O3-δ has the highest electrical conductivity and the lowest cathodic polarization. Using La0.7Sr0.3Cu0.7Fe0.3O3-δ as cathode and 65%NiO/SDC as anode based on SDC electrolyte one can obtain higher current density and power density at intermediate temperatures, La0.7Sr0.3Cu0.7Fe0.3O3-δ is considered to be a possible cathode adapted to IT-SOFCs.

• Periodical: Advanced Materials Research (Volumes 160-162)
• Pages: 666-670
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.160-162.666
• Online since: November 2010
• Authors: Min Zhang Zheng, Xiao Mei Liu
• Keywords: Cathode, La_0.7Sr_0.3Cu_1-xFe_xO_3-δ, Solid Oxide Fuel Cell (SOFC)

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