Preparation of BaCe0.5Fe0.4Co0.1O3-δ Cathode with High Oxygen Electrocatalysis Activity for Intermediate Temperature Solid Oxide Fuel Cells

被引：0
作者：
Cao H. [1 ]
Chen Y. [1 ]
Zhu L. [1 ]
Hong T. [1 ]
Cheng J. [1 ]
机构：
[1] School of Materials Science and Engineering, Hefei University of Technology, Anhui Key Laboratory of Advanced Functional Materials and Devices, Hefei
来源：
Zhongguo Xitu Xuebao/Journal of the Chinese Rare Earth Society | 2020年 / 38卷 / 02期
关键词：
Dual phase cathode; Electrochemical performance; Oxygen reduction reaction; Perovskite; Rare earths; Solid oxide fuel cell;
D O I：
10.11785/S1000-4343.20200207
中图分类号：
学科分类号：
摘要：
BaCe0.5Fe0.4Co0.1O3-δ (BCFC) cathode powders were synthesized by EDTA-citric acid method using Ba(NO3)2, Ce(NO3)3•6H2O, Fe(NO3)3•9H2O, Co(NO3)2•6H2O as raw materials, and were sintered. Phase composition, microstructure and oxygen reduction process of the powder and the sintered samples were investigated. Symmetrical cells and single cells based on the BCFC cathode were assembled with Sm0.2Ce0.8O2-δ (SDC) as electrolyte and NiO-SDC as anode, and their electrochemical properties were investigated. The results showed that the BCFC powders can in situ decompose into BaCe0.15Fe0.75Co0.1O3-δ and BaCe0.85Fe0.05Co0.1O3-δ phases. Surface oxygen exchange coefficient (Kchem) of BCFC is 3.8×10-4 cm•s-1 at 700 ℃. Area specific resistance (ASR) of the symmetrical cell is 0.819 Ω•cm2 at 600 ℃, and after long term test and 10 times thermal vibration cycles, ASR remains stable at about 1.6 Ω•cm2. Maximum power density of the single cell reaches 290 and 204 mW•cm-2 at 700 and 650 ℃, respectively, and the corresponding open circuit voltages are 0.80 and 0.82 V, respectively. The preliminary results indicated that BCFC show good electrochemical performance and stability for used as cathode materials of intermediate temperature solid oxide fuel cells. © 2020, Editorial Office of Journal of the Chinese Society of Rare Earths. All right reserved.
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页码：176 / 184
页数：8
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