High Current Density of Solid Oxide Fuel Cell with Anode Support via Phase Inversion Method

Abstract

Anode support is prepared using phase inversion method and directly used for anode supported solid oxide fuel cell. The anode substrate is about 560 µm in thickness and has a porosity of 60.0%. The finger-like pore layer is 522 µm in thickness, in which the finger-like pore diameter is about 30 µm. The sponge layer is 28 µm in thickness and has a porosity of 46.1%. The single cell with Ni-YSZ/YSZ/GDC/BaCo_0.4Fe_0.4Zr_0.1Y_0.1O_3−δ configuration is fabricated with YSZ electrolyte on the skin layer. At 800°C and under an output voltage of 0.64 V, the single cell attains a power density of 3.33 W cm⁻². At 700°C, 750°C and 800°C, the single cell outputs a current density over 5.2 A cm⁻² without the appearance of limited current density from gas transport. The results depict gas transport in the anode substrate with the sponge layer and the skin layer is highly efficient.