摘要
采用流延法制备了阳极支撑的固体氧化物燃料电池(SOFC),电解质材料为钇稳定化氧化锆(YSZ),阳极为镍和YSZ构成的金属陶瓷(Ni-YSZ),阴极为LSCF-GDC/LSCF复合材料,同时在阴极与电解质之间制备了YSZ-GDC/GDC双过渡层。分别采用含3%的加湿H_2和活性炭为燃料,对此电池的输出性能及阻抗谱进行测试。采用加湿H_2测试的结果表明:在800℃下,采用双过渡层电池的开路电压达到1 V,最大功率密度为680 mW·cm^(-2),比未改良电池的最大功率密度(372 mW·cm^(-2))提高了83%。直接采用固体碳为燃料时,具有双过渡层阴极的电池在850℃时的开路电压达到0.95 V,最大输出功率密度达429 mW·cm^(-2),几乎比无过渡层阴极的电池(225 mW·cm^(-2))高出1倍,特别是双过渡层阴极还使直接使用碳燃料的SOFC(DC-SOFC)的燃料利用率提高了33%。
An anode-supported solid oxide fuel cell(SOFC) was fabricated by a tape casting technique. Yttrium stabilized zirconia(YSZ) was used as the material of electrolyte, a cermet of nickel and YSZ as the material of anode, and composite of LSCF-GDC as the cathode material. YSZ-GDC and GDC interlayers were prepared between the cathode and the electrolyte film. The output performance and impedance spectrum of cells were tested with 3% humidified hydrogen and solid carbon as fuel, respectively. It is found that the open circuit voltage(OCV) of a SOFC operated on humidified hydrogen reaches 1.0 V at 800 ℃. A maximum power density of a SOFC with the double-interlayer cathode(680 mW·cm^-2) is 83% larger than the cell without interlayers(372 mW·cm^-2). Meanwhile, when carbon is directly used as the fuel, a SOFC with the addition of double-interlayer shows OCV of 0.95 V at 850 ℃. Its maximum power density is 429 mW·cm^-2, which is almost twice of that of a similar direct carbon SOFC without the interlayers(225 mW·cm^-2). Especially, the double-interlayer cathode increases the fuel utilization of a direct carbon SOFC(DC-SOFC) by 33%.
作者
汪维
刘志军
张亚鹏
刘佩佩
刘美林
刘江
Wang Wei;Liu Zhijun;Zhang Yapeng;Liu Peipei;Liu Meilin;Liu Jiang(Guangzhou Key Laboratory for Surface Chemistry of Energy Materials,New Energy Research Institute,School ofEnvironment and Energy,South China University of Technology,Guangzhou 510006,China;School of Materials Science & Engineering,Georgia Institute of Technology,Atlanta,GA 30332-0245,USA)
出处
《中国稀土学报》
CAS
CSCD
北大核心
2019年第2期232-240,I0004,共10页
Journal of the Chinese Society of Rare Earths
基金
国家自然科学基金项目(91745203
U1601207)
广东省公共研究与能力建设专项基金项目(2014A010106008)
广东省引进创新创业团队项目(2014ZT05N200)资助
关键词
固体氧化物燃料电池
阳极支撑
流延法
双过渡层阴极
碳燃料
稀土
solid oxide fuel cell
anode-supported
tape casting
double-interlayer cathode
carbon fuel
rare earths
