Nanostructured SOFC Electrode Scaffolds Prepared via High Temperature in situ Carbon Templating of Hybrid Materials
Nanostructured SOFC Electrode Scaffolds Prepared via High Temperature in situ Carbon Templating of Hybrid Materials
复制标题
通过混合材料高温原位碳模板制备纳米结构 SOFC 电极支架
DOI：
10.1149/07801.1407ecst
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Gross, Michael D
中科院分区：
文献类型：
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作者：
Muhoza, Sixbert P;Barrett, Taylor E;Soll, Sydney E.;Gross, Michael D
在传统烧结温度下，采用无机-有机混合凝胶在氩气中烧结制备了高表面积固体氧化物燃料电池（SOFC）电极支架材料。制备的材料为氧化钇稳定氧化锆（YSZ, 8mol % Y2O3），钆掺杂氧化锆（GDC, Ce0）。8 gd0。2O3-δ)和钛酸锶（STO, SrTiO3）。采用柠檬酸法和环氧丙烷法制备凝胶。将凝胶在1050 ~ 1350℃的氩气中原位烧结，制备出无定形碳模板，保留了陶瓷支架的纳米结构。将碳模板在空气中加热至700℃后去除。YSZ、GDC和STO的比表面积分别高达83、95和99 m2/g。通过修改凝胶配方可以调节碳模板浓度和产生的表面积。采用传统的YSZ和纳米结构YSZ制备对称阴极电池。正如预期的那样，凝胶衍生的纳米结构YSZ改善了电极的性能。
High surface area solid oxide fuel cell (SOFC) electrode scaffold materials were prepared at traditional sintering temperatures by sintering hybrid inorganic-organic gels in argon. The prepared materials were yttria-stabilized zirconia (YSZ, 8 mol% Y2O3), gadolinia doped ceria (GDC, Ce0. 8Gd0. 2O3-δ) and strontium titanate (STO, SrTiO3). Gels were prepared via the citric acid (Pechini) method and the propylene oxide method. The gels were sintered between 1050oC and 1350oC in argon, creating an amorphous carbon template in situ, which preserved a ceramic scaffold nanostructure. The carbon template was removed upon heating in air to 700oC. Specific surface areas up to 83, 95, and 99 m2/g were achieved for YSZ, GDC, and STO, respectively. The carbon template concentration and resulting surface areas are tunable by modifying the gel formulations. Symmetric cathode cells were prepared with traditional and nanostructured YSZ. As expected, the gel-derived, nanostructured YSZ improved electrode performance.