低温共烧结制备阴极支撑管式固体氧化物燃料电池  

Low Temperature Fabrication of Cathode-Supported Tubular Solid Oxide Fuel Cell by Co-Fire Process

作　　者：熊保[1] 韩敏芳[1] 

机构地区：[1]中国矿业大学(北京)化学与环境工程学院燃料电池研究中心,北京100083

出　　处：《真空电子技术》2011年第4期35-38,共4页Vacuum Electronics

基　　金：科技部国际合作项目(2009DFA6136);北京市重点学科建设项目的财政资助

摘　　要：采用挤出成型法制备锰酸锶镧-氧化钇稳定氧化锆(LSM-YSZ)阴极支撑管,利用浸渍-提拉泥浆涂覆法在LSM-YSZ阴极支撑管上制备了LSM-YSZ阴极功能层、YSZ电解质和NiO-YSZ阳极多层薄膜,经低温一次共烧结制备阴极支撑管式单元固体氧化物燃料电池(SOFC)。利用扫描电镜和电化学工作站等对单元电池的微观结构和电化学性能进行了较系统的表征,结果表明:经1220℃低温共烧结8h后,LSM-YSZ支撑体上的阴极功能层、电解质和阳极各层薄膜结合紧密,电解质薄膜致密无缺陷,厚约15μm;以湿氢气为燃料,空气为氧化剂时,单元电池在700～800℃下的开路电压均高于1.0V,说明电解质薄膜具有足够的气密性,但阴极的低电导率和低孔隙率限制了电池的电性能。采用浸渍-提拉薄膜技术,经一次低温共烧结制备阴极支撑管式SOFC,为SOFC低成本制备奠定了基础。Strontium doped lanthanum manganite-yttria doped zirconia（LSM-YSZ） tubular cathode support was prepared via an extrusion method.Cathode functional layer,electrolyte and anode thin films were sequentially deposited onto the cathode support with dip-coating technique,by co-sintering of which at low temperature,a cathode-supported tubular solid oxide fuel cell（SOFC） was fabricated.The microstructure and electrical performance of the tubular SOFC were characterized by scanning electron microscopy and electrochemical workstation,respectively.The results showed that cathode functional layer,electrolyte and anode thin films are tightly sintered to the cathode support after co-sintering at 1220 ℃ for 8 h,and the YSZ electrolyte film is dense enough with thickness of about 15 μm.The open circuit voltages of the single cell tested from 700 ℃ to 800 ℃ are all above 1.0 V with humidified H2 as fuel and air as oxidant,which are close to the theoretical value,indicated that the electrolyte film has enough tightness.However,the cell demonstrated poor electrical performance,which maybe caused by the low conductivity and porosity of the cathode support.The cathode supported tubular SOFC was successfully fabricated by dip-coating method and subsequent co-sintering at low temperature,which is beneficial to low cost manufacturing of SOFC.

关 键 词：固体氧化物燃料电池 阴极支撑 浸渍-提拉 低温共烧结 

分 类 号：TM911.47[电气工程—电力电子与电力传动]