摘要
采用溶胶-凝胶法在中温固体氧化物燃料电池(ITSOFC)阴极LaBaCo_2O_(5+δ)(LBCO)和电解质yttria-stabilized zirconia(YSZ)界面之间制备与电解质同质的过渡界面层。利用X线衍射仪(XRD)研究物质的晶体结构和化学相容性,通过扫描电子显微镜(SEM)、交流阻抗谱法和循环伏安法分别对试样的微观结构和电化学性能进行了研究。实验结果表明:过渡界面层使电解质表面形成"岛状"列阵结构;在800℃时,未引入和引入YSZ过渡界面层LBCO阴极的比表面电阻从0.354Ω·cm^2降低到0.215Ω·cm^2,下降了约39.3%。过渡界面层的引入使阴极的比表面电阻和极化过电位均降低,表现出更好的电化学性能。
Yttria-stabilized zirconia（YSZ） buffer interlayer coatings were fabricated between LaBaCo_2O_（5＋δ）（LBCO） cathode and YSZ electrolyte pellet through sol-gel process for intermediate temperature solid oxide fuel cells（ITSOFC）.The crystal structure and chemical compatibility were investigated by X-ray diffraction（XRD）.The microstructure was investigated by scanning electron microscopy（SEM） analysis and the electrochemical performances were studied by impedance spectroscopy and cyclic voltammetry.Results showed that ＂islands＂ array structure was formed on the electrolyte surface with the buffer interlayer.In addition,the area-specific resistance of LBCO cathode was decreased from 0.354 Ω·cm^2 to 0.215 Ω·cm^2,reduced by about 39.3%.The introduction of buffer interlayer led the decreasing of areaspecific resistance and polarization of cathode with a better electrochemical performance.
出处
《南京工业大学学报（自然科学版）》
北大核心
2017年第6期7-11,共5页
Journal of Nanjing Tech University(Natural Science Edition)
基金
江苏高校优势学科建设工程(PAPD)
江苏省普通高校研究生科研创新计划(CXZZ13_0423)
关键词
中温固体氧化物燃料电池
过渡界面层
阴极
电化学性能
intermediate temperature solid oxide fuel cell （ ITSOFC ）
buffer interlayer
cathode
electrochemical performance
