Processing Nano-YSZ in Solid Oxide Fuel Cells: The Effect of Sintering Atmosphere on Thermochemical Stability
Processing Nano-YSZ in Solid Oxide Fuel Cells: The Effect of Sintering Atmosphere on Thermochemical Stability
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固体氧化物燃料电池中纳米 YSZ 的加工：烧结气氛对热化学稳定性的影响
DOI：
10.1149/2.0261902jes
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发表时间：
2019
影响因子：
3.9
通讯作者：
Gross, M. D.
中科院分区：
文献类型：
--
作者：
Muhoza, S. P.;McCormack, A.;Garrett, R. W.;Yuce, M. D.;Prathab, V. S.;Hambright, S. K.;Cottam, M. A.;Gross, M. D.
研究了原位碳模板法制备的纳米氧化钇稳定氧化锆(NYSZ)在850℃-1350℃范围内，在Ar、N2、H2和加湿H2四种气氛下的热化学稳定性。碳模板随后通过低温氧化去除，留下纳米级的陶瓷颗粒。在Ar和H2中，在≥115 0℃时形成的一种锆杂物。在加湿的氢气中，要么形成一种锆杂物，要么使碳模板氧化。在氮气中，在所研究的温度范围内没有观察到ZRC，并且保存了碳模板。去除碳模板剂后，Ar、H2和N2的nYSZ比表面积较高：55~99m2·g−1。对于加湿的H2，nYSZ比表面积随碳模板剂的丧失而减小。最后，将经850℃和1250℃氮气处理的nYSZ集成到对称YSZ-锶铁氧体(YSZ-LSF)阴极电池中。添加nYSZ使550C空气中nYSZ的阴极非欧姆电阻降低了40%，而在850C和1250C处理的nYSZ分别降低了27%和40%。这项工作表明，氮气是原位碳模板的热化学稳定气氛，由此产生的nYSZ显著改善了电极性能。
The thermochemical stability of nanoscale yttria-stabilized-zirconia (nYSZ), processed via in situ carbon templating, was studied between 850 C–1350 C in four sintering atmospheres: Ar, N 2, H 2, and humidified H 2. The in situ carbon templating method generates nanoscale ceramic particles surrounded by an amorphous carbon template upon sintering. The carbon template is subsequently removed by low temperature oxidation, leaving behind nanoscale ceramic particles. In Ar and H 2, a ZrC impurity formed at temperatures≥ 1150 C. In humidified H 2, either a ZrC impurity formed or the carbon template oxidized. In N 2, ZrC was not observed over the temperature range studied and the carbon template was preserved. After carbon template removal, the nYSZ surface areas were high for Ar, H 2, and N 2: 55–99 m 2· g− 1. For humidified H 2, nYSZ surface area decreased as the carbon template was lost. Finally, nYSZ, processed in N 2 at 850 C and 1250 C, was integrated into symmetric YSZ-Lanthanum Strontium Ferrite (YSZ-LSF) cathode cells. The addition of nYSZ decreased cathode non-ohmic resistance, at 550 C in air, by 40% and 27% for nYSZ processed at 850 C and 1250 C, respectively. This work demonstrates that N 2 is a thermochemically stable atmosphere for in situ carbon templating and that the resulting nYSZ considerably improves electrode performance.
氮气气氛对 3mol% 氧化钇掺杂氧化锆致密化的影响
影响因子：
3.9
作者：
Y. Paek;Jung;Gyeungho Kim;Suk
通讯作者：
Suk
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
发表时间：
2017
期刊：
ECS Transactions
影响因子：
--
作者：
Muhoza, Sixbert P;Barrett, Taylor E;Soll, Sydney E.;Gross, Michael D
通讯作者：
Gross, Michael D
通过原位碳模板干凝胶高温制造纳米结构氧化钇稳定氧化锆 (YSZ) 支架。
DOI：
--
发表时间：
2017
期刊：
Journal of Visualized Experiments
影响因子：
--
作者：
S. Muhoza;M. Cottam;M. Gross
通讯作者：
M. Gross