多层水系流延和共烧法制备具有阳极功能层固体氧化物燃料电池

Multilayer Aqueous Tape Casting of Solid Oxide Fule Cell with Anode Active Layer

采用多层水系流延和共烧方法制备具有阳极功能层的单电池。阳极基底、阳极功能层、电解质层和阴极层分别为Ni-YSZ、Ni-ScSZ、YSZ和LSM-ScSZ。在H2/空气气氛中,分别在700、750、800℃测试具有阳极功能层的单电池,其最大功率密度分别为:0.30、0.55 W/cm2和0.8W/cm2;其对应的电池欧姆电阻(R0)分别为0.39、0.30 cm2和0.19 cm2。电池的极化电阻则分别为1.28、0.91 cm2和0.62 cm2。采用相同工艺制备无阳极功能层的单电池,其在700、750、800℃的最大功率密度分别为0.21、0.31W/cm2和0.56 W/cm2,对应的R0为0.41、0.39 cm2和0.28 cm2。电池的极化电阻为1.40、1.27 cm2和0.91 cm2。这说明采用的多层水系流延和共烧法制备的固体氧化物燃料电池的阳极功能层能有效减小电池的活化极化,从而提高单电池的电化学性能。

The anode-supported single cells with an anode active layer were prepared by a multilayer aqueous tape casting and co-sintering method. Nickel/yttria-stabilized zirconia （Ni/YSZ）, nickel/scandia-stabilized zirconia （Ni/ScSZ） cermets, YSZ and LSM-ScSZ were used as the materials of anode substrate, anode active layer, electrolyte and cathode, respectively. When H2/air is used as operating gases, the maximum power density of the single cell with the anode active layer is 0.30, 0.55 and 0.8 W/cm2 at 700, 750 and 800 ℃, the ohmic resistance is 0.39, 0.30 and 0.19 I）.cm2, and the polarization resistance is 1.28, 0.91 and 0.62 Ω.cm2, respectively. Compared to the single cell without the anode active layer, the maximum power density of the anode-supported single cells with the anode active layer is 0.21, 0.31 and 0.56W/cm2, the ohmic resistance is 0.41, 0.39 and 0.28 Ω.cm2, and the polarization resistance is 1.40, 1.27 and 0.91 D.cm2, respectively. The results show that the cell with the anode active layer prepared by multilayer aqueous tape casting can reduce the activation polarization and enhance the cell performance.