Synthesis of Ba0.3Ca0.7Co0.8Fe0.2O3-δ composite material as novel catalytic cathode for ceria-carbonate electrolyte fuel cells

被引：29
作者：
Afzal, Muhammad [1 ]
Raza, Rizwan [2 ]
Du, Shangfeng [3 ]
Lima, Raquel Bohn [4 ]
Zhu, Bin [1 ,5 ]
机构：
[1] Royal Inst Technol KTH, Dept Energy Technol, S-10044 Stockholm, Sweden
[2] COMSATS Inst Informat Technol, Dept Phys, Lahore 54000, Pakistan
[3] Univ Birmingham, Sch Chem Engn, Birmingham B15 2TT, W Midlands, England
[4] Royal Inst Technol KTH, Chem Sci & Engn, Fibre & Polymer Sci, S-10044 Stockholm, Sweden
[5] Hubei Univ, Fac Phys & Elect Technol, Hubei Collaborat Innovat Ctr Adv Organ Chem Mat, Wuhan 430062, Peoples R China
来源：
ELECTROCHIMICA ACTA | 2015年 / 178卷
基金：
瑞典研究理事会;
关键词：
Composite cathode; perovskite oxide; BCCF37; low temperature; SOFC; KINETICS;
D O I：
10.1016/j.electacta.2015.07.183
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
This work reports a new composite BaxCa1-xCoyFe1-yO3-delta (BCCF) cathode material for advanced and low temperature solid oxide fuel cells (SOFCs). The BCCF-based composite material was synthesized by sol gel method and investigated as a catalytic cathode for low temperature (LT) SOFCs. XRD analysis of the as-prepared material revealed the dominating BCCF perovskite structure as the main phase accompanied with cobalt and calcium oxides as the secondary phases resulting into an overall composite structure. Structure and morphology of the sample was observed by Field Emission Scanning Electron Microscope (FE-SEM). In particular, the Ba0.3Ca0.7Co0.8Fe0.2O3-delta (BCCF37) showed a maximum conductivity of 143 S cm(-1) in air at 550 degrees C measured by DC 4 probe method. The BCCF at the optimized composition exhibited much higher electrical conductivities than the commercial Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) perovskite cathode material. A maximum power density of 325 mW cm(-2) at 550 degrees C is achieved for the ceria-carbonate electrolyte fuel cell with BCCF37 as the cathode material. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：385 / 391
页数：7
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