Method for extracting kinetic parameters from measured impedance spectra

1989 ◽  
Vol 34 (8) ◽  
pp. 1179-1185 ◽  
Author(s):  
P. Kurzweil ◽  
J. Ober ◽  
D.W. Wabner
Keyword(s):  
Kinetic Parameters ◽  
Impedance Spectra ◽  
Measured Impedance

Hexathiapentacene Nanowires as Chemical Vapor Sensors

2010 ◽  
Vol 1253 ◽  
Author(s):  
Ting Gao ◽  
Edgardo Garcia-Berrios ◽  
Alejandro L Briseno ◽  
Jian Wang ◽  
Richard McConville ◽  
...  
Keyword(s):  
Single Crystal ◽  
Quartz Crystal Microbalance ◽  
Quartz Crystal ◽  
Chemical Vapor ◽  
Solution Phase ◽  
Equivalent Circuits ◽  
Impedance Spectra ◽  
Charge Migration ◽  
Vapor Sensors ◽  
Measured Impedance

AbstractSemiconducting hexathiapentacene (HTP) single–crystal nanowires were synthesized using a simple solution-phase route. Quartz Crystal Microbalance and complex resistance measurements were employed to investigate the sensing properties of an HTP nanowire to analytes including acid, amine, and hydrocarbon vapors. Cole-Cole plots (0.01Hz-4 MHz) of measured impedance spectra, modeled using equivalent circuits, were used to resolve the effects of adsorption and charge migration.

scholarly journals Single and multi-frequency impedance characterization of symmetric activated carbon single capacitor cells

2018 ◽  
Vol 8 (2) ◽  
pp. 183-195
Author(s):  
Suzana Sopčić ◽  
Davor Antonić ◽  
Zoran Mandić ◽  
Krešimir Kvastek ◽  
Višnja Horvat-Radošević
Keyword(s):  
Activated Carbon ◽  
Electrode Materials ◽  
Electrochemical Impedance ◽  
Internal Resistance ◽  
Single Frequency ◽  
Impedance Spectra ◽  
Frequency Method ◽  
Measured Impedance ◽  
Impedance Characterization

Electrochemical impedance spectroscopy (EIS) technique is used for characterization of single cell symmetric capacitors having different mass loadings of activated carbon (AC). Relevant values of charge storage capacitance (CT) and internal resistance (ESR) were evaluated by the single frequency and multi-frequency analyses of measured impedance spectra. Curve fittings were based on the non-ideal R-C model that takes into account the parasitic inductance, contributions from electrode materials/contacts and the effects of AC porosity. Higher CT and lower ESR values were obtained not only for the cell with higher mass of AC, but also using the single vs. multi-frequency approach. Lower CT and higher values of ESR that are generally obtained using the multi-frequency method and curve fittings should be related to the not ideal capacitive response of porous AC material and too high frequency chosen in applying the single frequency analysis.

On the Interpretation of Measured Impedance Spectra of Insertion Cathodes for Lithium-Ion Batteries

2010 ◽  
Vol 157 (11) ◽  
pp. A1218 ◽  
Author(s):  
Jean-Marcel Atebamba ◽  
Joze Moskon ◽  
Stane Pejovnik ◽  
Miran Gaberscek
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Impedance Spectra ◽  
Measured Impedance

scholarly journals Ac Impedance Spectroscopy Of Al/A-Sic/C–Si(P)/Al Heterostructure under Illumination

2014 ◽  
Vol 65 (3) ◽  
pp. 174-178 ◽  
Author(s):  
Milan Perný ◽  
Vladimír Šály ◽  
Michal Váry ◽  
Miroslav Mikolášek ◽  
Jozef Huran ◽  
...  
Keyword(s):  
Crystalline Silicon ◽  
Barrier Properties ◽  
Negative Capacitance ◽  
Impedance Spectra ◽  
Frequency Range ◽  
Ac Impedance Spectroscopy ◽  
Impedance Data ◽  
Current Voltage ◽  
Measured Impedance ◽  
Electronic Behavior

Abstract The amorphous silicon carbide/crystalline silicon heterojunction was prepared and analyzed. The current-voltage (I − V ) measurements showed the barrier properties of prepared sample. Biased impedance spectra of Al/a-SiC/c-Si(p)/Al heterojunction under the standard illumination are reported and analyzed. AC measurements in the illuminated conditions were processed in order to identify electronic behavior using equivalent AC circuit which was suggested and obtained by fitting the measured impedance data. A phenomenon of negative capacitance/resistance in certain frequency range has been observed.

The advantages of mass normalized electrochemical impedance spectra for the determination of the kinetic parameters of LiMn2O4 cathodes

2019 ◽  
Vol 326 ◽  
pp. 134969
Author(s):  
M.A. Kamenskii ◽  
S.N. Eliseeva ◽  
E.G. Tolstopjatova ◽  
A.I. Volkov ◽  
D.V. Zhuzhelskii ◽  
...  
Keyword(s):  
Kinetic Parameters ◽  
Electrochemical Impedance ◽  
Impedance Spectra ◽  
Electrochemical Impedance Spectra ◽  
Limn2o4 Cathodes

Impedance of an Oxygen Reducing Gas-Diffusion Electrode

1984 ◽  
Vol 39 (2) ◽  
pp. 157-162 ◽  
Author(s):  
Dietrich Wabner ◽  
Rudolf Holze ◽  
Peter Schmittinger
Keyword(s):  
Diffusion Processes ◽  
Impedance Analysis ◽  
Electrode Reaction ◽  
Gas Diffusion ◽  
Porous Electrodes ◽  
Least Square ◽  
Impedance Spectra ◽  
Least Square Fit ◽  
Measured Impedance ◽  
Small Charge

The impedance of teflon bonded electrodes was measured in the frequency domain. These electrodes based on activated carbon as electrocatalyst were developed for fuel cell applications. When feeding the electrode with air or oxygen the impedance spectra could be explained by two Nernst diffusion processes and a small charge transfer process.Two methods for separating the measured impedance into partial impedances related to different steps of the electrode reaction are presented. A least square fit procedure is described which has been applied successfully to the impedance analysis of porous electrodes

MEASUREMENT OF STEROID BINDING PROTEINS

1970 ◽  
Vol 65 (1_Suppl) ◽  
pp. S104-S121 ◽  
Author(s):  
E. E. Baulieu ◽  
J. P. Raynaud ◽  
E. Milgrom
Keyword(s):  
Kinetic Parameters ◽  
Binding Proteins ◽  
Binding Specificity ◽  
Binding Parameters ◽  
Target Organs ◽  
Biological Mixtures ◽  
Steroid Binding Proteins ◽  
Steroid Binding ◽  
Steroid Binding Protein

ABSTRACT A brief review of the characteristics of steroid binding proteins found in the plasma and in some target organs is presented, followed by some general remarks on binding »specificity« and binding parameters. Useful techniques for measuring binding parameters at equilibrium are reported, both those which keep the equilibrium intact and those which implicate its disruption. A concept is developed according to which the determination of a specific steroid binding protein is based on the »differential dissociation« of the several steroid binding complexes present in most biological mixtures. Methods which allow determination of the kinetic parameters of the binding systems are also presented. Various representations of the binding and therefore different modes of graphic representation and calculation are discussed, including the recent »proportion graph« method.

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