摘要
采用溶胶-凝胶法合成了新型中温固体氧化物燃料电池(IT-SOFCs)阳极材料Ce1-xCoxOy(x=0.10,0.15,0.20,0.25,0.30)(CDC),并采用共压-共烧结法制备了以NiO-CDC复合阳极为支撑、以Ce0.8Gd0.2O2-δ(GDC)为电解质、以La0.8Sr0.2Co0.8Fe0.2O3-δ(LSCF)-GDC为复合阴极的单电池.利用XRD和SEM等方法对阳极材料进行了晶相结构、微观形貌和化学相容性等分析.在400~700℃范围内,以加湿天然气(3%H2O)为燃料气,氧气为氧化气测试了电池的电化学性能.结果表明:CDC阳极材料具有良好的孔道结构;八种不同阳极组成的单电池中50wt%NiO-50wt%Ce0.8Co0.2Oy(C20C80)阳极支撑的单电池具有最佳的电化学性能,在650℃时其最大电流密度为148.84mA/cm2,最大比功率为30.91mW/cm2.
Ce1-xCoxOy(x =0.10, 0. 15, 0.20, 0. 25, 0. 30)(CDC) powders as the anode materials of intermediate temperature solid oxide fuel cells (IT-SOFCs) were prepared by sol-gel method. The NiO-CDC anode-supported cells were fabricated by dry-pressing process using Ce0.8 Gd0.2O2-δ (GDC) as electrolyte and La0.8Sr0.2Co0.8Fe0.2O3-δ(LSCF)-GDC as cathode. The crystal structure, morphology and chemical stability were investigated by XRD and SEM respectively. The performances of single ceils were tested by using humidified natural gas (3% H2O ) as fuel and oxygen as oxidant in the temperature range from 400℃ to 700℃;. The results show that the anode of the cell has good open-framework; The 50wt%NiO-50wt%Ce0.8Co0.2Oy(C20C80)anode-supported cell shows the best electrochemical performance among the eight cells composed of different anodes. The maximum current density and power density are 148.84mA/cm2 and 30.91mW/cm2 tested at 650℃ , respectively.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2009年第3期539-544,共6页
Journal of Inorganic Materials
基金
国家自然科学基金(50662005)