IT-SOFC复合阴极NdBaCo_(2)O_(5+δ)-NdMnO_(3)的电性能研究  

The Study on Electrical Properties of Composite Material NdBaCo_(2)O_(5+δ)-NdMnO_(3)as IT-SOFC Cathode

作　　者：刘璞 李翱飞 邱文文 武桐 蒋龙 裴启明 LIU Pu;LI Aofei;QIU Wenwen;WU Tong;JIANG Long;PEI Qiming(School of Physics and Optoelectronic Engineering,Yangtze University,Jingzhou Hubei 434023,China;Shanghai Jingruiyang Industrial Company Limited,Shanghai 201314,China)

机构地区：[1]长江大学物理与光电工程学院,湖北荆州434023 [2]上海景瑞阳实业有限公司,上海201314

出　　处：《江西师范大学学报（自然科学版）》2024年第4期340-345,共6页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：国家自然科学基金(11605014);湖北省自然科学基金(2017CFB576)资助项目.

摘　　要：该文利用溶胶-凝胶法和固相法制备了钙钛矿结构氧化物NdBaCo_(2)O_(5+δ)(NBCO)和NdMnO_(3)(NMO)作为中温固体氧化物燃料电池(IT-SOFC)阴极材料,并且2种氧化物能保持良好的相容性.NBCO阴极导电呈现金属性质,而NMO呈现半导体性质.因此,NMO的添加不利于改善NBCO阴极材料的导电性能.电化学阻抗谱表明:复合阴极NBC-NM20在800℃下的极化电阻为0.026Ω·cm^(2),在NBCO阴极中适量添加NMO氧化物能降低极化电阻,改善阴极/电解质界面电荷传输的动力学性能.Perovskite oxides NdBaCo_(2)O_(5+δ)(NBCO)and NdMnO_(3)(NMO)are prepared by sol-gel method and solid-state method as cathode materials of intimidate-temperature solid oxide fuel cells(IT-SOFC).The two oxides can keep good compatibility.The conductivity of NBCO cathode presents metallic conductive properties,while that of NMO exhibits semiconductor properties,therefore the addition of NMO is unfavorable to improve the conductivity of NBCO cathode materials.Electrochemical impedance spectroscopy shows that the polarization resistance of composite cathode NBC-NM20 at 800℃is 0.026Ωcm^(2),and the addition of proper amount NMO oxide to the NBCO cathode can reduce the polarization resistance,and can effectively improve the kinetic performance of charge transfer at cathode/electrolyte interface.

关 键 词：复合阴极 钙钛矿 负热膨胀 电导率 催化活性 动力学 

分 类 号：O211.67[理学—概率论与数理统计]