Composite Ag-La0.8Sr0.2MnO3-σ Cathode for Solid Oxide Fuel Cells

2013 ◽  
Vol 58 (4) ◽  
pp. 1337-1340 ◽  
Author(s):  
M. Mosiałek ◽  
M. Przybyła ◽  
M. Tatko ◽  
P. Nowak ◽  
M. Dudek ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Charge Transfer Resistance ◽  
Solid Oxide ◽  
Organic Polymer ◽  
Metallic Silver ◽  
Oxide Fuel ◽  
Transfer Resistance ◽  
Composite Cathodes ◽  
The Matrix

Abstract Composite cathodes for solid oxide fuel cells composed of metallic silver dispersed in ceramic (La0:8Sr0:2MnO3-σ) matrix were prepared on the surface of solid electrolyte by two-step procedure. First the matrix of controlled porosity was created by sintering mixture of La0:8Sr0:2MnO3-σ powder with the organic polymer beads then the matrix was saturated with AgNO3 solution and sintered again. Such obtained cathodes showed higher electrical conductivity and lower charge transfer resistance in oxygen reduction reaction in comparison to pure ceramic cathodes

Composite Ag-La0.6Sr0.4Co0.8Fe0.2O3-δ Cathode Material for Solid Oxide Fuel Cells, Preparation and Characteristic

2013 ◽  
Vol 58 (4) ◽  
pp. 1341-1345 ◽  
Author(s):  
M. Mosialek ◽  
M. Tatko ◽  
M. Dudek ◽  
E. Bielańska ◽  
G. Mordarski
Keyword(s):  
Solid Oxide Fuel Cells ◽  
Cathode Material ◽  
Silver Powder ◽  
Solid Oxide ◽  
Metallic Silver ◽  
Oxide Fuel ◽  
Agno3 Solution ◽  
Composite Cathodes ◽  
The Matrix ◽  
Second Procedure

Abstract Composite cathodes Ag-La0.6Sr0.4Co0.2Fe0.8O3-δ were obtained by two different procedures. In the first procedure porous La0.6Sr0.4Co0.2Fe0.8O3-δ (LSCF) matrix was prepared by sintering the LSCF paste, the matrix was then saturated with AgNO3 solution and sintered again. Introduced silver crystalized in the form of 10 nm crystallites in the whole LSCF matrix. In the second procedure the paste of silver powder was deposited on the surface of electrolyte and dried. The layer of silver paste was then covered by a layer of the LSCF paste and sintered at 850°C. The following cells were tested: H2|Ni-Ce0.8Gd0.2O1.9|Ce0.8Sm0.2O1.9 LSCF|O2, H2|Ni-Ce0.8Gd0.2O1.9|Ce0.8Sm0.2O1.9|LSCF-Ag|O2 and H2|Ni-Ce0.8Gd0.2O1.9|Ce0.8Sm-O1.9|Ag|LSCF|O2. Introduction of silver interlayer between cathode and electrolyte increased output power by 18-28% whereas introduction of metallic silver into porous LSCF caused increase in power by 14-18%.

Self-assembled dynamic perovskite composite cathodes for intermediate temperature solid oxide fuel cells

Nature Energy ◽  
2017 ◽  
Vol 2 (3) ◽  
Author(s):  
J. Felix Shin ◽  
Wen Xu ◽  
Marco Zanella ◽  
Karl Dawson ◽  
Stanislav N. Savvin ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Intermediate Temperature ◽  
Oxide Fuel ◽  
Composite Cathodes ◽  
Self Assembled

Cobalt oxide enhanced lanthanum strontium cobalt ferrite electrode for solid oxide fuel cells

2021 ◽  
pp. 1-13
Author(s):  
Alberto Olivo ◽  
Berceste Beyribey ◽  
Hwan Kim ◽  
Joshua Persky
Keyword(s):  
Charge Transfer ◽  
Solid Oxide Fuel Cells ◽  
Charge Transfer Resistance ◽  
Solid Oxide ◽  
Co3o4 Nanoparticles ◽  
Incipient Wetness Impregnation ◽  
Impregnation Method ◽  
Oxide Fuel ◽  
Transfer Resistance ◽  
And Diffusion

A Co3O4 enhanced La0.8Sr0.2Co0.5Fe0.5O3 - δ (LSCF) electrode is developed for use in air electrodes with proton conducting solid oxide fuel cell (SOFC). The incipient wetness impregnation method enables Co3O4 nanoparticles on the LSCF surface without altering the bulk porosity of the LSCF electrode. The polarization resistance of LSCF electrodes is significantly reduced by Co3O4 doping, and both charge transfer and diffusion/conversion resistances were positively affected. The highest reduction in charge transfer resistance is obtained at 700 °C, which is increased from 21%to 32%through reduction of po 2. Conversely, the highest reduction in diffusion/conversion resistance is achieved at 550 °C. By increasing po 2, the reduction is increased from 57%to 66%and its activation energy is reduced up to 33 %compared to pure LSCF. The lowest total area specific resistances obtained under air are 1.45 Ω·cm2, 2.95 Ω·cm2, 6.75 Ω·cm2 and 16.45 Ω·cm2 at 700 °C, 650 °C, 600 °C and 550 °C, respectively.

SFA-SDC Composite Cathodes Fabricated with Glycine-Nitrate Process for Intermediate-Temperature Solid Oxide Fuel Cells

2014 ◽  
Vol 1070-1072 ◽  
pp. 488-491
Author(s):  
Xiu Ling Yu ◽  
Ming Fei Shi
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Power Density ◽  
Peak Power ◽  
Solid Oxide ◽  
Intermediate Temperature ◽  
Oxide Fuel ◽  
Reaction Products ◽  
Mass Content ◽  
Composite Cathodes

SrFe0.9Al0.1O3-δ(SFA) powder was mixed with a different mass content of SDC 10, 20 and 30 wt.% to form SFA-SDC composite cathodes subsequently investigated as potential IT-SOFC cathodes on LSGM electrolytes. No obvious reaction products between SDC (or LSGM) and SFA occur under test for the cathode of SOFCs. As SOFC cathodes, the area-specific resistances of the SFA-SDC cathodes on the LSGM electrolyte with SDC 10, 20 and 30 wt.% at 800 oC are 0.089, 0.068 and 0.087 Ω cm2, respectively. The peak power density of the SFA-SDC20 on a 300 μm-thick LSGM electrolyte reach 512 mW cm−2 at 800 °C.

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