Application of sonochemical processing to LSC(La_0.6Sr_0.4CoO₃)/SDC(Sm₂O₃-doped CeO₂) composite cathodes for solid oxide fuel cells involving CeO₂-based electrolytes

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• 作者：Myeong-Hee Ko ; Jin-Ha Hwang ; ^{jhwang@wow.hongik.ac.kr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Sonochemical processing ; Composite cathodes ; Solid oxide fuel cells ; CeO2-based electrolytes ; Impedance spectroscopy
• 刊名：Ceramics International
• 出版年：2016
• 出版时间：1 August 2016
• 年：2016
• 卷：42
• 期：10
• 页码：11548-11553
• 全文大小：1481 K

文摘

Nanocrystalline Sm₂O₃-Doped CeO₂ (SDC) powders were synthesized in a single- and two-phase material system by using sonochemical processing with high-frequency agitation. The synthesized SDC nanocrystalline powders were used to coat the mixed-conducting La_0.6Sr_0.4CoO₃ (LSC) cathode materials. The combined synthesis processing allows the artificial coating of the LSC materials with the ionic-conducting SDC electrolyte. The electrochemical polarizations of the SDC/LSC composites are characterized using a geometrically constricted contact between the ionic probe and the SDC/LSC composites. The lowest cathode polarization was obtained for the LSC (85 wt%)/SDC (15 wt%). The lowest electrode polarization is believed to result from the high density of the triple-phase boundaries when the constituent phases are interconnected in a 3-dimensional manner.