Center for Fuel Cell Innovation, State Key Laboratory of Coal Combustion, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.
Sci Rep. 2015 Feb 2;5:8174. doi: 10.1038/srep08174.
Tubular solid oxide fuel cells were fabricated and evaluated for their microstructure and electrochemical performance. The tubular substrate was prepared by casting NiO-Y2O3 stabilized ZrO2 (YSZ) slurry on the inner wall of a plastic mold (tube). The wall thickness and uniformity were controlled by slurry viscosity and rotation speed of the tube. The cells consisted of Ni-YSZ functional anode, YSZ electrolyte and (La0.8Sr0.2)0.95MnO(3-δ) (LSM)-YSZ cathode prepared in sequence on the substrate by dip-coating and sintering. Their dimension was 50 mm in length, 0.8 mm in thickness and 10.5 mm in outside diameter. The peak power density of the cell at temperatures between 650 and 850°C was in the range from 85 to 522 mW cm(-2) and was greatly enhanced to the range from 308 to 1220 mW cm(-2) by impregnating PdO into LSM-YSZ cathode. During a cell testing at 0.7 A cm(-2) and 750°C for 282 h, the impregnated PdO particles grew by coalescence, which increased the cathode polarization resistance and so that decreased the cell performance. According to the degradation tendency, the cell performance will be stabilized in a longer run.
管状固体氧化物燃料电池的制备及其微观结构和电化学性能进行了评价。管状基底是通过将 NiO-Y2O3 稳定 ZrO2(YSZ)浆料涂覆在塑料模具(管)的内表面上而制备的。浆料的粘度和管的转速控制着壁的厚度和均匀性。电池由 Ni-YSZ 功能阳极、YSZ 电解质和(La0.8Sr0.2)0.95MnO(3-δ)(LSM)-YSZ 阴极组成，这些阴极是通过浸涂和烧结顺序在基底上制备的。它们的尺寸为长 50mm、厚 0.8mm、外径 10.5mm。在 650 至 850°C 的温度范围内，电池的峰值功率密度在 85 至 522 mW cm(-2)的范围内，通过将 PdO 浸渍到 LSM-YSZ 阴极中，其功率密度大大提高到 308 至 1220 mW cm(-2)的范围内。在 0.7 A cm(-2)和 750°C 下测试 282 小时期间，浸渍的 PdO 颗粒通过聚结而生长，这增加了阴极极化电阻，从而降低了电池性能。根据降解趋势，电池性能将在更长的运行时间内稳定下来。
