Ce0.9Sr0.1Cr0.5Fe0.5O3-delta as the anode materials for solid oxide fuel cells running on H-2 and H2S

作者：Zhu Xiufang; Yan Han; Zhong Qin^*; Zhao Xuejun; Tan Wenyi

来源：Journal of Alloys and Compounds, 2011, 509(33): 8360-8364.

DOI：10.1016/j.jallcom.2011.03.124

• Solid oxygen fuel cell
• Anode catalyst
• Perovskite structure
• Electrical conductivity
• H2S

Ce0.9Sr0.1Cr0.5Fe0.5O3-delta (CSCrF) powders were synthesized by gel combustion method and the conductivities have been evaluated with DC four-probe method in 3% H-2-N-2 and 5% H2S-N-2 at 400-800 degrees C, respectively. XRD shows that CSCrF powders have cubic perovskite structure which is similar to that of CeCrO3 (JCPDS card No. 75-0289). Meanwhile, CSCrF exhibits good chemical compatibility with electrolyte (Ce0.8Sm0.2O1.9) in N-2. Through analysis of XRD and IR, some Ce0.9Sr0.1Cr0.5Fe0.5(O, S)(3-delta) are produced after exposure to 5% H2S-N-2 at 800 degrees C for 5 h, which has a resemblance to Refs. [1,2]. The electrochemical properties were measured for the cell comprising CSCrF-Sm0.2Ce0.8O1.9/Sm0.2Ce0.8O1.9/Ag in 5% H2S at low temperature (450, 500, 550 and 600 degrees C), and in 3% H-2-N-2 at 500 degrees C, respectively. Electrochemical impedance spectroscopy (EIS) and the equivalent circuit reveal that polarization resistance is the main reason affecting the performance of the cell at low temperature. The area specific resistance significantly decreases with the increasing temperature.

• 出版日期2011-8-18
• 单位南京工程学院; 南京大学