以Ni-YSZ和Sm0.5Sr0.5Fe0.8Cu0.2O3-δ为电极的微管固体氧化物燃料电池的制备及电化学性能(英文)

Fabrication and Electrochemical of Micro-Tubular SOFC with Ni-YSZ Anode and Sm_(0.5)Sr_(0.5)Fe_(0.8)Cu_(0.2)O_(3-δ) Cathode

分别以Ni-YSZ中空纤维为阳极和Sm0.5Sr0.5Fe0.8Cu0.2O3–δ–Sm0.2Ce0.8O1.9(SSFCu-SDC)为阴极制备了微管固体氧化物燃料电池(SOFC)。利用扫描电子显微镜(SEM)、电化学工作站表征了微管单电池的显微结构与电化学性能。SEM分析表明,采用相转化法制备的Ni-YSZ中空纤维阳极呈特殊的非对称结构,主要由中间海绵状结构和内外两侧的指孔状多孔结构构成。通过真空辅助浸渍涂覆法和与阳极共烧技术在阳极支撑体上制备了致密的YSZ电解质膜和SDC过渡层。分别采用湿氢为燃料和静态环境空气为氧化剂测定了制备的微管单电池在650～750℃时的电化学性能。结果表明,该微管单电池具有高的输出性能,在750、700℃和650℃时的最大功率密度分别可达到485.9、382.7mW/cm2和260.3mW/cm2。

A micro-tubular solid oxide fuel cell （SOFC） was fabricated with Ni-YSZ hollow fiber as an anode substrate and Sm0.5Sr0.5Fe0.8Cu0.2O3-δ-Sm0.2Ce0.8O1.9（SSFCu-SDC） composite as cathode. The microstructure and electrochemical performance of the as-prepared single cell were characterized by scanning electron microscope and electrochemical workstation, respectively. The NiO-YSZ hollow fiber anode prepared by a phase inversion technique shows a special asymmetric structure consisting of porous sponge-like structure in the middle and finger-like porous structure on the inner and outer sides. The dense thin YSZ electrolyte mem- brane and SDC transition layer were deposited on the NiO-YSZ hollow fiber anode by a vacuum-assisted dip-coating and co-sintering technique. The electrochemical performance of the as-prepared micro tubular single cell was measured at 650-750℃ with humidi- fied H2 as a fuel and static ambient air as an oxidant. The peak power densities of 485.9, 382.7 mW/cm2 and 260.3 mW/cm2 can be obtained at 750, 700 and 650℃, respectively.