氧化铈基燃料电池高性能阴极研究  

High active cathode for doped ceria electrolyte in SOFC

作　　者：熊洁[1] 刘泽[1] 韩敏芳[1] 

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

出　　处：《电源技术》2011年第5期615-618,共4页Chinese Journal of Power Sources

基　　金：国家自然科学基金重点项目(50730004);科技部国际合作项目(2009DFA6136)

摘　　要：研究了用于中低温固体氧化物燃料电池(IT-SOFC)的高性能新型阴极材料Ba1.0-xCo0.7Fe0.2Nb0.1O3-δ(B1-xCFN,x=0,0.05,0.10)。以氧化钆掺杂氧化铈(GDC)为电解质,制备了B1-xCFN||GDC||B1-xCFN和La0.6Sr0.4Co0.2Fe0.8O3-δ(LSCF)||GDC||LSCF对称电池,对比了不同组成Ba含量的B1-xCFN和LSCF阴极的电化学性能;并将B1-xCFN和LSCF阴极制备在NiO-GDC||GDC阳极支撑半电池上,研究其在全电池中的性能。结果表明,500℃时,B1-xCFN(x=0,0.05,0.10)的Rp值分别仅为LSCF的10.52%、7.72%和4.33%;650℃时,B1-xCFN(x=0,0.05,0.10)的Rp值分别是LSCF的66.62%、51.49%和42.76%;在500～650℃,以B1-xCFN为阴极的单电池性能也均显著高于以LSCF为阴极的电池性能,B1-xCFN电极表现出了优良的氧催化活性,是极富应用前景的中低温固体氧化物燃料电池阴极材料。The electrochemical properties of Ba1.0-xCo0.7Fe0.2Nb0.1O3-δ（B1-xCFN,x=0,0.05,0.10） as a desirable novel cathode material for intermediate solid oxide fuel cells（IT-SOFCs） were investigated.Symmetrical fuel cells with GDC as electrolyte,using simultaneously the same materials B1-xCFN or La0.6Sr0.4Co0.2Fe0.8O3-δ（LSCF） as both anode and cathode,were prepared and the polarization resistance Rp of B1-xCFN｜｜GDC｜｜B1-xCFN and LSCF｜｜GDC｜｜LSCF symmetrical cells in air were evaluated with an electrochemical work station;afterwards the anode-supported single cells with B1-xCFN and LSCF cathode were prepared respectively,and their performance were tested.The results show that the Rp of B1-xCFN（x=0,0.05,0.10） accounts for 10.52%,7.72% and 4.33% of that of LSCF at 500 ℃;and the Rp of B1-xCFN（x=0,0.05,0.10） accounts for 66.62%,51.49% and 42.76% of that of LSCF at 650 ℃;besides,performance of anode-supported single cells with B1-xCFN cathode are much better than that of cells with LSCF cathode during 500-650 ℃,B1-xCFN cathode displays excellent oxygen catalytic effects,which indicates B1-xCFN is a potential cathode material for SOFC operated at low or intermediate temperatures.

关 键 词：中低温固体氧化物燃料电池 Ba1.0-xCo0.7Fe0.2Nb0.1O3-δ阴极 对称电池 

分 类 号：TM911[电气工程—电力电子与电力传动]