One-Step Infiltration of Mixed Conducting Electrocatalysts for Reducing Cathode Polarization of a Commercial Cathode-Supported SOFC

Nansheng Xu, Xue Li, Xuan Zhao, Hailei Zhao, Kevin Huang
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引用次数: 9

Abstract

Infiltrating fine-grained electrocatalyst particles of either ion conducting or mixed electron and ion conducting (MEIC) material into a ceramic porous electrode scaffold has proven a very effective way to improve electrode performance for low to intermediate temperature solid oxide fuel cells (SOFCs). We report here one-step infiltration of MEIC fine particles, La0.6Sr0.4CoO3-δ (LSCo) and SrCo0.8Fe0.2O3-δ (SCF), into a commercial cathode substrate. A comparative study shows that the cathode polarization can be considerably reduced by a factor of 17 to 28 and 28 to 49 from 1000 to 700 ◦ C by the infiltrated LSCF and SCF electrocatalysts, respectively, demonstrating an effective solution to improve the electrode performance without altering mechanical properties of the electrode substrate.
混合导电电催化剂一步渗透降低商用阴极负载SOFC阴极极化
将离子导电或混合电子离子导电(MEIC)材料的细颗粒电催化剂颗粒渗透到陶瓷多孔电极支架中,已被证明是提高中低温固体氧化物燃料电池(sofc)电极性能的一种非常有效的方法。我们在这里报道了MEIC细颗粒La0.6Sr0.4CoO3-δ (LSCo)和SrCo0.8Fe0.2O3-δ (SCF)一步渗透到商业阴极衬底中。对比研究表明,在1000 ~ 700℃范围内,渗透LSCF和SCF电催化剂可将阴极极化率分别降低17 ~ 28倍和28 ~ 49倍,证明了在不改变电极衬底机械性能的情况下提高电极性能的有效解决方案。
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来源期刊
Electrochemical and Solid State Letters
Electrochemical and Solid State Letters 工程技术-材料科学:综合
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1.9 months
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