Preparation and Performance of Hierarchical Scaffold Cathode for Low-Temperature Solid Oxide Fuel Cells

被引：0

作者：

Wei F. ^{[1
]}

Wang L. ^{[1
]}

Luo L. ^{[1
]}

Zhang S. ^{[1
]}

Cheng L. ^{[2
]}

Xu X. ^{[1
]}

Yang L. ^{[3
]}

机构：

[1] School of Materials Science and Engineering, Jingdezhen Ceramic University, Jiangxi, Jingdezhen

[2] National Engineering Research Center for Domestic & Building Ceramics, Jingdezhen Ceramic University, Jiangxi, Jingdezhen

[3] Jiangmen Polytechnic, Guangdong, Jiangmen

来源：

Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2023年 / 51卷 / 07期

关键词：

cathode; distribution of relaxation times; hierarchical scaffold; low-temperature solid oxide fuel cells;

D O I：

10.14062/j.issn.0454-5648.20220998

中图分类号：

学科分类号：

摘要：

In order to improve the electrochemical performance of cathodes for low-temperature solid oxide fuel cells, two kinds of La0.6Sr0.4Co0.2Fe0.8O3−δ/Ce0.9Gd0.1O2-δ (LSCF/GDC) cathodes with a multifunctional hierarchical scaffold structure were prepared. The microstructure and electrochemical properties of the cathodes were investigated. The results show that the GDC primary scaffold with a porosity of 80.5% fully ensure the construction of LSCF or GDC secondary scaffold, subsequent loading and oxygen diffusion in the working state. Based on the analyses of distribution of relaxation times for the electrochemical impedance spectra, the cathode with LSCF nanoparticles as a secondary scaffold has a total polarization resistance of only 0.236 Ω·cm2 at 600 ℃ due to the abundant reactive sites and unobstructed electronic conduction, and the GDC nanoparticles loading promotes the adsorption/dissociation of oxygen. The hierarchical scaffold cathode has a simple process and excellent oxygen reduction performance, which can promote the further development of low-temperature solid oxide fuel cells. © 2023 Chinese Ceramic Society. All rights reserved.

引用

页码：1763 / 1772

页数：9

共 41 条

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