摘要
采用挤出成型法制备了添加石墨、淀粉、玉米粉3种不同阳极造孔剂的NiO-YSZ阳极支撑型管式固体氧化物燃料电池阳极基体,并用浸渍法制备了YSZ(yttria-stabilized zirconia)膜电解质,以LSM(La0.85Sr0.15MnO3)为阴极制备成单电池。以空气为氧化剂,加湿氢气(约含有体积分数为3%的水)为燃料,测试了单电池在600～800℃的交流阻抗和输出性能,并采用扫描电镜对电池的微观结构进行了表征。结果表明:采用石墨为造孔剂时阳极基体微观结构较好,孔分布最均匀,且电池性能最好;单电池阳极管长度为5 cm,阴极有效面积为9.2 cm2时,在800℃进行电池性能测试,其开路电压为1.02 V,最大功率密度241 mW/cm2,单电池输出功率达到2.2 W。此时电池的总面积比电阻为1.6Ω.cm2,Ohm面积比电阻仅为0.7Ω.cm2。
Anode-supported solid oxide fuel cells were fabricated by an extrusion method with corn powder,starch and graphite as a pore formation agent,respectively.The YSZ electrolyte layer was dip-coated on a NiO-YSZ anode substrate.The LSM cathode was prepared by a slurry method.The single cell was examined with humidified hydrogen as fuel and air as oxidant at 600-800 ℃.The microstructure of the anode substrates was analyzed by scanning electron microscope.The results show that well-distributed porous anode is obtained after sintered with graphite as a pore formation agent,and the corresponding cells give the superior performance,compared to the cells with other pore formation agents.The maximum power density of a single cell with graphite as a pore formation agent reached 241 mW/cm2 at 800 ℃,and the Ohmic impedance was 0.7 Ω·cm2.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2011年第7期1140-1144,共5页
Journal of The Chinese Ceramic Society
基金
国家"863"计划(2007AA05Z136)资助项目
