Preparation and performance study of three-dimensional interconnected structured electrodes with lamellar connections

被引：0

作者：

Yang, Bing ^{[1
]}

Wang, Bo ^{[1
]}

Li, Peng ^{[1
]}

Chen, Jing ^{[1
]}

Li, Bo ^{[1
]}

Ma, Lushan ^{[1
]}

Zhang, Futian ^{[1
]}

Guo, Haitao ^{[1
]}

Tian, Yunfeng ^{[2
]}

Sun, Xuzhuo ^{[1
]}

Chi, Bo ^{[3
]}

机构：

[1] Henan Univ Technol, Sch Chem & Chem Engn, Zhengzhou 450001, Peoples R China

[2] China Univ Min & Technol, Sch Mat Sci & Phys, Xuzhou 221116, Peoples R China

[3] Huazhong Univ Sci & Technol, Ctr Fuel Cell Innovat, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Hubei, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2024年 / 501卷

基金：

中国国家自然科学基金;

关键词：

Solid oxide fuel cells; Three-dimensional interconnected structured; Sm0.5Sr0.5CoO3-delta; Polyacrylamide; Perovskite oxides; OXIDE FUEL-CELLS; PEROVSKITE; SEGREGATION; CATHODE;

D O I：

10.1016/j.cej.2024.157555

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study, we developed an innovative strategy to fabricate perovskite oxide powder with 12.356 m2/g of specific surface area. Polyacrylamide hydrogel was used as a template to prepare Sm0.5Sr0.5CoO3-delta (SSC) powders with lamellar structure. The three-dimensional interconnected structured SSC electrodes with lamellar connections were fabricate using screen printing method. As a result, the oxygen vacancy concentration of the SSC powder obtained by the polyacrylamide template method was 0.625 and 0.642 at 650 degrees C and 700 degrees C respectively. At 650 degrees C, the polarization resistance value was 0.11 S2 cm2 for the novel SSC-PAM-V cathode. Compared with the SSC-SG cathode, the polarization resistance and activation energy of SSC-PAM-V were reduced by 50 % and 6.9 %, respectively. Furthermore, in a single cell with SSC-PAM-V electrodes, we achieved a maximum power density of 935 and 1243 mW cm- 2 at 650 degrees C and 700 degrees C under wet H2 conditions, demonstrating good electrochemical output performance. The layered porous electrode was not only suitable for the diffusion of oxygen, but also for increasing the reactive active sites. The proposed powder prepared with polyacrylamide hydrogel as template, was not only suitable for the optimization of perovskite oxide, but also for the application in other types of catalysis, providing the potential for improving the electro-catalytic activity of perovskite electrodes.

引用

页数：10