中温固体氧化物燃料电池新型层状钙钛矿阴极材料Y_(0.8)Ca_(0.2)BaCo_2O_(5+δ)（英文）  

Novel Layered Perovskite Oxide Y_(0.8)Ca_(0.2)BaCo_2O_(5+δ) as Cathode for Intermediate Temperature Solid Oxide Fuel Cells

作　　者：葛武杰[1,2] 邵群[1] 丁岩芝[2] 王小连[1,2] 陈永红[2] 

机构地区：[1]安徽理工大学化学工程学院 [2]淮南低温共烧材料省级实验室,淮南师范学院化学与化工系,安徽淮南232001

出　　处：《硅酸盐学报》2013年第10期1415-1420,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51102107);安徽省科技计划项目(1206-c0805038)

摘　　要：研究了中温固体氧化物燃料电池的新型层状钙钛矿Y0．8Ca0．2BaCo2O5＋δ（YCBC）极材料。采用柠檬酸—硝酸盐自蔓延燃烧法合成了YCBC以及YBaCo2O5＋δ（YBC）粉体。X射线衍射结果表明：YCBC粉体在950℃空气中煅烧3h能够很好地成相，而YBC粉体需要1100℃。电导率测试结果表明：在整个测试温度350-800℃范围内，YCBC的电导率（435～506s／cm）明显比YBC的电导率（205～323S／cm）。使用电化学阻抗谱技术测试了对称电池YCBC／SDC／YCBC和阳极支撑的单电池YCBC／SDC／Ni—SDC的电化学性能。以H2为燃料气（含体积分数3％水蒸气），空气为氧化剂，650℃时单电池YCBC／SDC/Ni—SDC的最大输出功率为351mW／cm^2。目前研究表明YCBC是具有潜力的中温固体氧化物燃料电池阴极材料。A novel Ca-doped layered perovskite oxide Y0.8Ca0.2BaCo2O5＋δ （YCBC） was investigated as cathode material for intermediate-temperature solid oxide fuel cells （IT-SOFCs）. The YCBC and YBaCo2O5＋δ （YBC） powders were successfully synthesized by citric acid-nitrates self-propagating combustion method. X-ray diffraction confirmed that YCBC material calcined at 950 ~C for 3 h in air was well crystallized, but the well crystallized YBC occurred at 1 100 ~C. The electrical conductivity measurement showed that YCBC sample exhibited higher conductivity （of 435-505 S/cm） than that of YBC （of 205-323 S/cm） at the entire testing temperature range from 350-800 ~C. Symmetrical electrochemical cell with the configuration of YCBC/SDC/YCBC and an anode-supported sin- gle cell of YCBC/SDC/Ni-SDC were investigated using electrochemical impedance spectroscopy. The single cell of YCBC/SDC/Ni-SDC with humidified hydrogen （about 3% H20） as fuel and static air as oxidant exhibited excellent power density as high as 351 mW/cm2 at 650 ℃. Present results demonstrated that YCBC cathode material was a very promising cathode for intermediate temperature solid oxide fuel cells.

关 键 词：阴极 电化学性能 中温固体氧化物燃料电池 

分 类 号：TM911.4[电气工程—电力电子与电力传动]