采用水系流延技术制备平板式阳极支撑型固体氧化物燃料电池单电池(SOFC),研究了YSZ/Ni O的颗粒尺寸对阳极功能层电性能的影响。运用激光粒度仪、X-射线衍射仪、场发射扫描电镜和电化学工作站等测试手段分别对YSZ/Ni O的粒度分布、物相、阳极功能层的微观结构及成分和单电池的电性能进行了表征。研究结果表明,D50分别为0.19μm、0.26μm和0.54μm的YSZ/Ni O颗粒制备厚度在20μm内的阳极功能层的单电池,以H2+3%水蒸气为燃料气,空气为氧化气,在750℃最大功率密度分别为0.36 w/cm2、0.32 w/cm2和0.28 w/cm2,极化阻抗分别为0.56Ωcm2、0.64Ωcm2和0.68Ωcm2。阳极功能层YSZ∶Ni O质量比为48∶52。
The single cell of planar anode supported SOFC was prepared by aqueous tape casting, and the influence of particle size of YSZ/NiO on electrical performance of anode functional layer was investigated. The size distribution of YSZ/NiO, phase, microstructure and composition of anode functional layer and electrical performance of single cell were characterized by laser particle analyzer, X-Ray diffraction, field emission scanning electron microscopy and electrochemical working station, respectively. The results show that, the maximum power density of the single cell of about 20 μm anode functional layer with the d50 for YSZ/NiO of 0.19 μm, 0.26 μm and 0.54 μm is 0.36 w/cm2, 0.32 w/cm2 and 0.28 w/cm2, respectively. And the polarization resistance accordingly is 0.56 Ωcm2, 0.64 Ωcm2 and 0.68 Ωcm2 using H2 +3%H2O as fuel gas and air as oxidant gas at 750 ℃. The mass ratio of YSZ and NiO is 48 : 52.