摘要
采用固相法合成了钙钛矿型氧化物La_(0.4)Sr_(0.6)Co_(0.2)Fe_(0.7)Nb_(0.1)O_(3-δ)(LSCFN),并采用流延-丝印法制备了以8 mol%Y_2O_3稳定Zr O_2(YSZ)为电解质、Gd_(0.1)Ce_(0.9)O_(2-δ)(GDC)为隔离层、LSCFN同时为阴极和阳极的对称固体氧化物燃料电池。利用X射线衍射对电极材料进行了物相及化学相容性分析,用扫描电镜表征了对称电池的微观形貌。分别以湿H_2(3%H_2O)和湿CH_4(3%H_2O)为燃料气,空气为氧化气测试了单电池的电化学性能,并在850℃湿CH_4下进行了电池的稳定性测试。结果表明:LSCFN与GDC具有良好的化学相容性。以湿H_2和湿CH_4为燃料气的单电池在850℃时最大功率密度分别为254和105 m W/cm^2。在100 h的CH_4稳定性测试中性能无明显衰减,具有良好的稳定性。
La_（0.4）Sr_（0.6）Co_（0.2）Fe_（0.7）Nb_（0.1）O_（3-δ）（LSCFN）, a perovskite oxide material, was synthesized by a solid state reaction method. The electrolyte-supported symmetrical solid oxide fuel cells were fabricated by tape-casting and screen-printing procedure using YSZ as electrolyte, Gd_（0.1）Ce_（0.9）O_（2-δ）（GDC） as an interlayer and LSCFN as both anode and cathode. The crystal structure and chemical stability were examined by X-ray diffraction（XRD） and microstructure was inspected by scanning electron microscopy（SEM）. The electrical properties of the single cell were tested by humidified（3% H_2O） H_2 and（3% H_2O） CH_4 as fuel, ambient air as oxidant and the stability was tested in humidified（3% H_2O） CH_4at 850 °C. The results show that LSCFN appears to be chemically compatible with GDC. The maximum power density is 254 and 105 m W/cm^2 in humidified H_2 and CH_4 at 850 °C, respectively. Stable performance is sustained for 100 h operating in humidified CH_4.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2017年第1期262-265,共4页
Rare Metal Materials and Engineering
基金
国家重点基础研究发展计划("973"计划)(2012CB215404)
国家自然科学基金(51261120378)
北京市优博项目(2050205)
清华大学"骨干人才支持计划"(543404001)
