A cobalt-free bismuth ferrite-based cathode for intermediate temperature solid oxide fuel cells

被引：54
作者：
Gao, Juntao [1 ]
Li, Qiang [2 ]
Zhang, Zhiping [3 ]
Lu, Zhe [1 ]
Wei, Bo [1 ]
机构：
[1] Harbin Inst Technol, Sch Phys, Harbin 150080, Peoples R China
[2] Heilongjiang Univ, Sch Chem & Mat Sci, Key Lab Funct Inorgan Mat Chem, Minist Educ, Harbin 150080, Peoples R China
[3] Harbin Engn Univ, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Peoples R China
来源：
ELECTROCHEMISTRY COMMUNICATIONS | 2021年 / 125卷
基金：
中国国家自然科学基金;
关键词：
Solid oxide fuel cell; Cathode materials; Cobalt-free; Electrochemical performance; THERMAL-EXPANSION; PERFORMANCE; PEROVSKITE; ELECTRODE;
D O I：
10.1016/j.elecom.2021.106978
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
High catalytic activity of cathode material is one of the key requirements for the practical application of solid oxide fuel cells (SOFC). Here we designed and evaluated a novel non-metal P-doped (Bi, Sr)FeO3_?, i.e., Bi0.5Sr0.5Fe0.95P0.05O3_? (BSFP) oxide, as cathode material. BSFP with a cubic structure presents excellent chemical compatibility with Ce0.9Gd0.1O1.95 (GDC) electrolyte after sintering at 1100 ?C. Impedance analysis reveals its polarization resistance (Rp) is as low as 0.18 0 cm2 at 700 ?C. Further kinetics study suggests the lowfrequency process is the rate-limiting step of the oxygen reduction reaction (ORR). An anode-supported single cell delivers attractive power output of 0.56 W cm_ 2 at 700 ?C. The electroactivity is superior to undoped (Bi, Sr) FeO3_?, indicating that BSFP perovskite could be a promising cathode for SOFC operating at intermediate temperatures.
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页数：5
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