Study on anode material of CoδFe1-δOx-Sm0.2Ce0.8O1.9 for solid oxide fuel cell

Abstract

Abstract This paper mainly explores the anode properties of CoδFe1-δOx-Sm0.2Ce0.8O1.9 (SDC) (δ=0, 0.2, 0.5, 0.8, and 1) for solid oxide fuel cell (SOFC). The composite anode materials were synthesized by sol-gel method, and the XRD technique was used to characterize structural properties. After H2 reduction at 700 oC, the CoδFe1-δOx oxides were reduced to Co, Fe metal or Co-Fe alloy. The symmetric cells were fabricated with CoδFe1-δOx-SDC as the electrodes and SDC-carbonate as the electrolyte. At 700 oC, the symmetric cell with Co0.5Fe0.5Ox-SDC electrodes showed the lowest polarization resistance and the symmetric cell with Co0.2Fe0.8Ox-SDC showed the largest polarization resistance.