Ru-Ni-YSZ多维阳极在直接乙醇SOFC的应用研究

采用浸渍-自置换法,以Ru Cl3为添加剂,丙酮为表面活性剂,在阳极支撑SOFC的Ni-YSZ阳极上表面制备纳米Ru功能层,并制备Ru-Ni-YSZ||YSZ||Pd-Ag单电池。通过SEM,TEM,XRD对电极进行表征,发现Ru在Ni-YSZ阳极表面以及内部可以形成多维纳米花状催化层。通过测试不同沉积量和不同温度下纳米Ru层对单电池的电性能的影响。在750℃时,以乙醇为燃料,Ru沉积量为0.6%(质量分数)的燃料达到最高264 m W/cm~2。当Ru沉积量为0.4%时,燃料电池在700,750,800℃时,最大功率分别达到200、261和316 m W/cm2。在开路电压条件下,电池运行15h,没有出现下降和积碳现象。

Ethanol-fueled SOFC used RuSnano flowers doped Ni-YSZ anode

Three-dimensional Ru nano flowers are formed by nano sheets originating from the Ni-YSZ anode layer. The nano flowers are utilized as a functional layer for direct ethanol solid oxide fuel cells (DE-SOFCs). The morphology and structure of as-prepared catalysts are characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffraction (XRD), which verified that the flower-like RuSnano layer is uniformly dispersed on Ni-YSZ surface. These nanostructures show very interesting performance properties for direct ethanol solid oxide fuel cell. With 0.6wt.% Ru in anode, the cell peak power density reaches 264 mSWScm_?S2 wet ethanol fuel at 750S°C. The fuel cell power density reaches 200, 261 and 316mW /cm₂ at 700,750 and 800_oC,respectively. By dispersing a 0.6wt.% Ru layer into anode, the performance of fuel cells is improved and kept stable at open circuit voltage (OCV) for 15 hrs without carbon deposition.