Fabrication and characterization of SDC–LSGM composite electrolytes material in IT-SOFCs

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• 作者：Dan Xu ; Xiaomei Liu ; Dejun Wang ; Guangyu Yi ; Yang Gao ; Daisheng Zhang ; Wenhui Su
• 关键词：SOFC ; Composite electrolyte ; SDC ; LSGM ; Open-circuit voltage
• 刊名：Journal of Alloys and Compounds
• 出版年：2007
• 出版时间：21 February 2007
• 年：2007
• 卷：429
• 期：1-2
• 页码：292-295
• 全文大小：458 K

文摘

The electrolytes materials Ce_0.85Sm_0.15O_1.925 (SDC) and La_0.9Sr_0.1Ga_0.8Mg_0.2O_2.85 (LSGM) were synthesized by means of glycine-nitrate process (GNP), respectively, then the composite electrolytes were prepared by mixing SDC and LSGM. Its electrical properties were investigated. It shows that when the composition was 90 wt. % SDC and 10 wt. % LSGM (SL91), the electrolyte has higher electrical conductivity as compared to SDC in the temperature of 500–700 °C. The V–I characteristics of single cell shows that the maximum output power density was 0.25 W/cm² at 800 °C and maximum current density was 1.06 A/cm². The open-circuit voltage (OCV) was higher than the cell using single SDC as electrolyte at the working temperature (600–800 °C).