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Improved electrochemical oxidation kinetics of La0.5Ba0.5FeO3-δ anode for solid oxide fuel cells with fluorine doping
被引:37
作者:

Hou, Nianjun
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Tianjin Univ, State Key Lab Chem Engn, Tianjin Key Lab Appl Catalysis Sci & Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China Tianjin Univ, State Key Lab Chem Engn, Tianjin Key Lab Appl Catalysis Sci & Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

Gan, Juanjuan
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Tianjin Univ, State Key Lab Chem Engn, Tianjin Key Lab Appl Catalysis Sci & Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China Tianjin Univ, State Key Lab Chem Engn, Tianjin Key Lab Appl Catalysis Sci & Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

Yan, Qisheng
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Tianjin Univ, State Key Lab Chem Engn, Tianjin Key Lab Appl Catalysis Sci & Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China Tianjin Univ, State Key Lab Chem Engn, Tianjin Key Lab Appl Catalysis Sci & Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

Zhao, Yicheng
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Tianjin Univ, State Key Lab Chem Engn, Tianjin Key Lab Appl Catalysis Sci & Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China Tianjin Univ, State Key Lab Chem Engn, Tianjin Key Lab Appl Catalysis Sci & Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

Li, Yongdan
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Tianjin Univ, State Key Lab Chem Engn, Tianjin Key Lab Appl Catalysis Sci & Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
Aalto Univ, Dept Chem & Met Engn, Kemistintie 1, FI-00076 Aalto, Finland Tianjin Univ, State Key Lab Chem Engn, Tianjin Key Lab Appl Catalysis Sci & Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
机构:
[1] Tianjin Univ, State Key Lab Chem Engn, Tianjin Key Lab Appl Catalysis Sci & Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
[2] Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
[3] Aalto Univ, Dept Chem & Met Engn, Kemistintie 1, FI-00076 Aalto, Finland
基金:
中国国家自然科学基金;
关键词:
Anode;
Solid oxide fuel cell;
Anion doping;
Hydrocarbon fuel;
Lanthanum ferrite;
ELECTRICAL-CONDUCTIVITY RELAXATION;
SELECTIVE OXIDATION;
PEROVSKITE;
PERFORMANCE;
CATHODE;
TEMPERATURE;
ETHANE;
HYDROCARBON;
GENERATION;
CATALYSTS;
D O I:
10.1016/j.jpowsour.2021.230932
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:
Sluggish anode kinetics and serious carbon deposition are two major obstacles to developing hydrocarbon fueled solid oxide fuel cells. A highly active and stable perovskite La0.5Ba0.5FeO3-delta anode material is studied in this work. The oxygen surface exchange and charge transfer steps are the rate-determining steps of the anode process, and the former is accelerated with fluorine doping on the anion sites due to the lowering of metal-oxygen bond energy. The oxygen surface exchange coefficients of La0.5Ba0.5FeO3-delta and La0.5Ba0.5FeO2.9-delta F0.1 at 850 degrees C are 1.4 x 10-4 and 2.8 x 10-4 cm s-1, respectively. A single cell supported by a 300 mu m-thick La0.8Sr0.2Ga0.8Mg0.2O3-delta electrolyte layer with La0.5Ba0.5FeO3-delta anode shows maximum power densities of 1446 and 691 mW cm-2 at 850 degrees C with wet hydrogen and methane fuels, respectively, which increase to 1860 and 809 mW cm-2 respectively when La0.5Ba0.5FeO2.9-delta F0.1 is used as the anode. The cell exhibits a short-term durability of 40 h using wet methane as fuel without carbon deposition on the anode.
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