阳极支撑质子导体电解质固体氧化物燃料电池的制备及其性能研究

Fabrication and Characterization of Anode-supported Solid Oxide Fuel Cell Based on Proton Conductor Electrolyte

本研究采用高温固相反应法合成了BaCe0.7Zr0.1Y0.2O3–δ(BCZY7)质子导体氧化物,对材料的物相结构和微观形貌进行表征和分析,并将BCZY7作为固体氧化物燃料电池(SOFC)的电解质,通过浸渍法和共烧结法成功制备了阳极支撑的NiO-BCZY7/BCZY7/La0.6Sr0.4Co0.2Fe0.8O3–δ(LSCF)-BCZY7钮扣式电池。以氢气(含3vol%H2O)为燃料,空气为氧化剂,对电池的电化学性能进行测试。结果表明,在600、550、500℃时,电池的最高功率密度分别为203, 123, 92 mW·cm–2,而传统(ZrO2)0.92(Y2O3)0.08基SOFC在600℃时通常只有几十毫瓦的单位面积输出,质子导体电解质可以极大改善SOFC的中低温性能,缓解SOFC工作温度高的问题。

Proton conducting oxide BaCe0.7Zr0.1Y0.2O3–δ(BCZY7) was synthesized by high temperature solid-state reaction method, which crystal structure and microstructure morphology were characterized. The anode-supported button solid oxide fuel cell(SOFC), NiO-BCZY7/BCZY7/La0.6Sr0.4Co0.2Fe0.8O3–δ(LSCF)-BCZY7, was fabricated by combining the dip-coating and co-sintering processes. It operated by using H2(containing 3 vol% H2 O) as fuel and ambient air as oxidant. The maximum power density of the cell reaches 203, 123 and 92 mW·cm–2 at 600, 550 and 500 ℃, respectively. However, traditional SOFCs based on(ZrO2)0.92(Y2O3)0.08 electrolyte usually display only tens of milliwatts output per unit area at 600 ℃. Proton conducting electrolyte greatly improves the low and medium temperature performance of SOFCs and provides a promising solution to reduce SOFCs’ operating temperature.