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Microstructural and electrochemical properties of impregnated La0.4Sr0.6Ti0.8Mn0.2O3±d into a partially removed Ni SOFC anode substrate
Journal of Alloys and Compounds ( IF 5.8 ) Pub Date : 2021-02-01 , DOI: 10.1016/j.jallcom.2020.157250
Sung Hun Woo , Seung-Wook Baek , Dae Soo Park , Kyeong Eun Song , Harald Schlegl , Jun-Young Park , Jung Hyun Kim

The microstructural and electrochemical properties of anodes obtained by impregnation of the La0.4Sr0.6Ti0.8Mn0.2O3±d (LSTM) oxide system into two types of anode substrates such as Ni/ 8YSZ substrate (Ni (E)/ 8YSZ) and partially Ni removed Ni/ 8YSZ substrate (Ni(R)/8YSZ) were investigated in order to apply them as anode material for solid oxide fuel cells. All of the samples with LSTM impregnated on Ni (R)/ 8YSZ show higher electrical conductivity values than those of unimpregnated Ni (E)/ 8YSZ under dry H2 condition. The highest electrical conductivity values of 2041.2, 1877.4, and 1764.3 S/cm at 700, 800 and 900 °C can be achieved by samples with 3 wt% impregnated LSTM on Ni (R)/ 8YSZ. From the XPS analysis, the existence of a Ti metal peak on the surface of LSTM was only measured for the LSTM (3 wt%)-Ni (R)/ 8YSZ sample, metallic titanium on the surface can improve the electrical catalytic reaction. LSTM (3 wt%)-Ni (R)/ 8YSZ showed higher electrical conductivity values then those of LSTM (3 wt%)-Ni (E)/ 8YSZ in all the temperature ranges measured in the case of dry CH4 supply. Finally, the electrical conductivity of LSTM (3 wt%)-Ni (R)/ 8YSZ was stably maintained even when exposed to dry CH4 condition at 900 °C for a long time (100 h). © 2020 Elsevier B.V.

中文翻译:

将 La0.4Sr0.6Ti0.8Mn0.2O3±d 浸渍到部分去除的 Ni SOFC 阳极基板中的微观结构和电化学性能

通过将 La0.4Sr0.6Ti0.8Mn0.2O3±d (LSTM) 氧化物体系浸渍到两种类型的阳极基材中获得的阳极的微观结构和电化学性能,如 Ni/8YSZ 基材 (Ni(E)/8YSZ) 和部分研究了去除镍的 Ni/8YSZ 基材 (Ni(R)/8YSZ),以便将它们用作固体氧化物燃料电池的阳极材料。在干燥 H2 条件下,所有在 Ni(R)/8YSZ 上浸渍的 LSTM 样品都显示出比未浸渍的 Ni(E)/8YSZ 更高的电导率值。在 700、800 和 900 °C 下,通过在 Ni (R)/ 8YSZ 上浸渍 3 wt% LSTM 的样品可以获得最高的电导率值,分别为 2041.2、1877.4 和 1764.3 S/cm。从 XPS 分析中,仅对 LSTM (3 wt%)-Ni (R)/8YSZ 样品测量到 LSTM 表面存在 Ti 金属峰,表面的金属钛可以改善电催化反应。LSTM (3 wt%)-Ni (R)/ 8YSZ 在干 CH4 供应情况下测量的所有温度范围内显示出比 LSTM (3 wt%)-Ni (E)/8YSZ 更高的电导率值。最后,LSTM (3 wt%)-Ni (R)/ 8YSZ 的电导率即使在 900 °C 的干燥 CH4 条件下长时间(100 小时)也能保持稳定。© 2020 Elsevier BV
更新日期:2021-02-01
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