Fabrication and performance of La0.8Sr0.2MnO3/YSZ graded composite cathodes for SOFC
来源期刊：Rare Metals2008年第3期
论文作者：SUN Kening~a PIAO Jinhua~b ZHANG Naiqing~b CHEN Xinbing~b XU Shen~b ZHOU Derui~b ~a Department of Materials Science and Engineering,Beijing Normal University,Beijing ,China ~b Department of Applied Chemistry,Harbin Institute of Technology Harbin ,China
文章页码：278 - 281
摘 要：<正>The performance of multi-layer（1-x）La0.8Sr0.2MnO3/xYSZ graded composite cathodes was studied as electrode materials for intermediate solid oxide fuel cells（SOFC）.The thermal expansion coefficient,electrical conductivity,and electrochemical performance of multi-layer composite cathodes were investigated.The thermal expansion coefficient and electrical conductivity decreased with the increase in YSZ content.The（1-x）La0.8Sr0.2MnO3/xYSZ composite cathode greatly increased the length of the active triple phase boundary line（TPBL） among electrode,electrolyte,and gas phase,leading to a decrease in polarization resistance and an increase in polarization current density. The polarization current density of the triple-layer graded composite cathode（0.77 A/cm2）was the highest and that of the monolayer cathode （0.13 A/cm2）was the lowest.The polarization resistance（Rp）of the triple-layer graded composite cathode was only 0.182Ω·cm2 and that of the monolayer composite cathode was 0.323Ω·cm2.The power density of the triple-layer graded composite cathode was the highest and that of the monolayer composite cathode was the lowest.The triple-layer graded composite cathode had superior performance.
摘要：<正>The performance of multi-layer（1-x）La0.8Sr0.2MnO3/xYSZ graded composite cathodes was studied as electrode materials for intermediate solid oxide fuel cells（SOFC）.The thermal expansion coefficient,electrical conductivity,and electrochemical performance of multi-layer composite cathodes were investigated.The thermal expansion coefficient and electrical conductivity decreased with the increase in YSZ content.The（1-x）La0.8Sr0.2MnO3/xYSZ composite cathode greatly increased the length of the active triple phase boundary line（TPBL） among electrode,electrolyte,and gas phase,leading to a decrease in polarization resistance and an increase in polarization current density. The polarization current density of the triple-layer graded composite cathode（0.77 A/cm2）was the highest and that of the monolayer cathode （0.13 A/cm2）was the lowest.The polarization resistance（Rp）of the triple-layer graded composite cathode was only 0.182Ω·cm2 and that of the monolayer composite cathode was 0.323Ω·cm2.The power density of the triple-layer graded composite cathode was the highest and that of the monolayer composite cathode was the lowest.The triple-layer graded composite cathode had superior performance.
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