scholarly journals Electrochemical impedance spectroscopy of La0.6Sr0.4Co0.2Fe0.8O3-δ nanofiber cathodes for intermediate temperature-solid oxide fuel cell applications: A case study for the ‘depressed’ or ‘fractal’ Gerischer element

2019 ◽  
Vol 319 ◽  
pp. 657-671 ◽  
Author(s):  
Paola Costamagna ◽  
Elena Marzia Sala ◽  
Wenjing Zhang ◽  
Marie Lund Traulsen ◽  
Peter Holtappels
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Fuel Cell ◽  
Impedance Spectroscopy ◽  
Solid Oxide Fuel Cell ◽  
Electrochemical Impedance ◽  
Solid Oxide ◽  
Intermediate Temperature ◽  
Oxide Fuel

Electrochemical Impedance Spectroscopy of Liquid Tin Anode Solid Oxide Fuel Cell

2019 ◽  
Vol 33 (39) ◽  
pp. 93-121 ◽  
Author(s):  
Sean C. Rayman ◽  
Mark Koslowske ◽  
Linda Bateman ◽  
Thomas Tao ◽  
Ralph E. White
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Fuel Cell ◽  
Impedance Spectroscopy ◽  
Solid Oxide Fuel Cell ◽  
Electrochemical Impedance ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Tin Anode ◽  
Liquid Tin

scholarly journals Evaluation of strontium substituted lanthanum manganite-based solid oxide fuel cell cathodes using cone-shaped electrodes and electrochemical impedance spectroscopy

2018 ◽  
Author(s):  
Kent Kammer Hansen
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Fuel Cell ◽  
Impedance Spectroscopy ◽  
Solid Oxide Fuel Cell ◽  
Electrochemical Impedance ◽  
Active Species ◽  
Solid Oxide ◽  
Lanthanum Manganite ◽  
Oxide Fuel ◽  
Strontium Content

<p class="PaperAbstract">Five La<sub>1-x</sub>Sr<sub>x</sub>MnO<sub>3+</sub><sub>d</sub>-based perovskites (x = 0, 0.05, 0.15, 0.25 and 0.50) were synthesized and investigated by powder XRD, dilatometry and electrochemical impedance spectroscopy measurements and cone-shaped electrode techniques. The thermal expansion coefficient increased with increasing strontium content. It was shown that the total polarization resistance was the lowest for the intermediate compound, La<sub>0.95</sub>Sr<sub>0.05</sub>MnO<sub>3+</sub><sub>d</sub>. Two arcs were found in the impedance spectra. These arcs were attributed to two one-electron processes. The results indicate that either Mn(III) is the catalytically active species or that the redox capacity is important for the activity of the compounds towards the reduction of oxygen in a solid oxide fuel cell. At higher temperatures, the oxide ionic conductivity may also play a role.</p>

Electrochemical Characterization and Mechanisms of Solid Oxide Fuel Cells by Electrochemical Impedance Spectroscopy Under Different Applied Voltages

2010 ◽  
Author(s):  
Li Sun ◽  
Gianfranco DiGiuseppe
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Fuel Cell ◽  
Impedance Spectroscopy ◽  
Solid Oxide Fuel Cell ◽  
Current Density ◽  
Electrochemical Impedance ◽  
Density Measurement ◽  
Electrical Circuit ◽  
Solid Oxide ◽  
Oxide Fuel

In this paper, the behavior of an anode-supported solid oxide fuel cell is studied by using voltage-current density measurement and electrochemical impedance spectroscopy. The cell total polarization obtained from electrochemical impedance spectroscopy results is shown to be consistent with the area-specific resistance calculated from the voltage-current density curve. An electrolyte-supported solid oxide fuel cell is then used to build an equivalent electrical circuit model using reference electrodes and electrochemical impedance spectroscopy. A four-constant phase element model is proposed to analyze the anode-supported solid oxide fuel cell. The model is used to evaluate an anode-supported solid oxide fuel cell under different cell voltages. The individual resistances are also studied as a function of applied voltage, and their physical meaning is explained in terms of reaction mechanisms occurring at the cathode and anode. It is shown that some of the obtained resistances are independent of diffusion while others have both a charge transfer and diffusion component.

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