Study on microstructure and physical properties of Ba0.5Sr0.5Fe1_xCuxO3_d-Ce0.8Sm0.15Ca0.05O1.875 cathode materials used in solid oxide fuel cell

被引：6
作者：
Wu, Yu-Chuan [1 ,2 ,4 ]
Ye, Ting-Ya [2 ]
Zhou, Zhangjian [3 ]
机构：
[1] Natl Taipei Univ Technol, Dept Mat & Mineral Resources Engn, Taipei 10608, Taiwan
[2] Natl Taipei Univ Technol, Inst Mat Sci & Engn, Taipei 10608, Taiwan
[3] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[4] 1,Sec 3,Chung Hsiao E Rd, Taipei 10608, Taiwan
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2024年 / 52卷
关键词：
Cobalt-free; Composite cathode; Conductivity; Solid oxide fuel cell; Energy efficiency; PEROVSKITE; FABRICATION; BACEO3; BA2+; SR2+; CA2+; SM3+;
D O I：
10.1016/j.ijhydene.2023.03.358
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Ba0.5Sr0.5Fe1-xCuxO3-d (BSFCu) and BSFCu-Ce0.8Sm0.15Ca0.05O1.875 (SCDC) were prepared by solid-state reaction and sol-gel method, respectively. The possibility of BSFCu-SCDC composites as cathodes for intermediate-temperature solid oxide fuel cells (IT-SOFCs) was investigated. The results show that BSFCu has a cubic BaFeO3 structure and no secondary phase. BSFCu-SCDC has cubic BaFeO3 and Ce0.8Sm0.2O1.9 structures, and BaCeO3 secondary phase. The polarization surface specific resistance (ASRRP) of BSFCu increases with increasing Cu doping. For BSFCu-SCDC, 7BSFCu10-3SCDC has the smallest ASRRP (0.106 U cm2, 800 degrees C) at 800 degrees C-750 degrees C; at 600 degrees C - 700 degrees C, 6BSFCu10-4SCDC has the smallest ASRRP (1.043 U cm2, 600 degrees C). The maximum exchange current densities of 7BSFCu10-3SCDC and 6BSFCu10-4SCDC are about 0.219 and 0.083 A cm-2 at 800 degrees C and 700 degrees C, respectively. Compared with BSFCu, 6BSFCu10-4SCDC has a lower overpotential, which shows better electrocatalytic activity, so it can increase the energy efficiency when applied to IT-SOFC. (c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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页码：928 / 937
页数：10
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