Debye–Falkenhagen dynamics of electric double layer in presence of electrode heterogeneities

Singh, Maibam Birla; Kant, Rama

doi:10.1016/j.jelechem.2013.07.007

Cited by 59 publications

(69 citation statements)

References 57 publications

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“…Kant and coworkers have also developed a deep insight in electric double layer. Debye-Falkenhagen dynamics of electric double layer is studied in the presence of electrode heterogeneities [71]. Also, a model is developed to study the effects of heterogeneity and roughness of electrode on electric double layer [72].…”

Section: Introductionmentioning

confidence: 99%

Generalization of Randles-Ershler admittance for an arbitrary topography electrode: application to random finite fractal roughness

Kant

Singh

2015

Electrochimica Acta

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Section: Introductionmentioning

confidence: 99%

Generalization of Randles-Ershler admittance for an arbitrary topography electrode: application to random finite fractal roughness

Kant

Singh

2015

Electrochimica Acta

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“…[21][22][23][24][25][26] Another interesting development came by using the Debye-Falkenhagen equation to study impedance spectra of partially blocking microscopically heterogeneous electrodes, 27 macroscopically rough (anomalous diffusion) electrodes, 28 and ionic liquids. 29 An equally important component of modeling EDLCs is the macroscopic level description of the EDLCs.…”

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confidence: 99%

Prediction of Charge-Discharge and Impedance Characteristics of Electric Double-Layer Capacitors Using Porous Electrode Theory

Hasyim

Rajagopalan

et al. 2017

J. Electrochem. Soc.

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Two first-principles modeling methods were used to analyze and quantitatively predict performance characteristics of Electric DoubleLayer Capacitors (EDLCs), namely Time-Domain Current Method (TDCM) and Frequency-Domain Admittance Method (FDAM). TDCM was used to model galvanostatic discharge characteristics of capacitor while FDAM was used to model the impedance spectra. Both the methods showed excellent agreement with experimental impedance and galvanostatic discharge performance of various electrochemical capacitors made using two different commercial carbons. Details at the macroscopic (porous electrode theory) and microscopic (double layer theory) level were incorporated into the models. The methods were also able to follow changes in capacitance and resistance of the capacitor during cycling. Furthermore, FDAM was used to validate the performance of a large-scale commercial EDLC capacitor. Electrochemical capacitors are receiving considerable attention as energy storage devices that can meet the energy and power demands for electric vehicles, renewable energy storage, smart grid, and energy harvesting technologies. [1][2][3][4] Energy in these capacitors is stored either in the form of electrostatic ionic charge at electrode/electrolyte interface or through fast faradaic interactions that contribute to pseudocapacitance at the interface. [5][6][7][8][9] Transient electroanalytical techniques such as galvanostatic charge/discharge and impedance spectroscopy are the key tools that are used to assess both the EDLC's materials characteristics and device performance. Development of mathematical models that accurately describe the interfacial phenomenon and validation through experimental observation is critical to further our understanding of the complexity of electrostatic/electrochemical interaction that occurs at the electrode/electrolyte interface.The development of models for EDLCs ties very deeply with the mathematical modeling of non-faradaic phenomena at the microscopic level. In these length scales, the double layer structure is described in terms of a diffuse/Gouy-Chapman layer and compact/Helmholtz layer. The compact layer will then be further divided into inner Helmholtz plane (IHP), that contain specifically adsorbed ions, and outer Helmholtz plane, which contains solvated ions that are attracted to the electrode due to charge interactions. To apply this conceptual picture to transient electroanalytical techniques, many different variations exist based upon the mathematical details and the choice of non-faradaic effects to be included/excluded in the models, e.g. specific adsorption, diffuse layer, and compact layer.Among all non-faradaic phenomena related to the double layer structure, the diffuse layer is one of the most intensively studied. The earliest treatment came by direct incorporation of the Gouy-ChapmanStern theory for different electroanalytical techniques, with some analytical solutions in the form of hypergeometric functions given in cases where they are possible. [10][11][12][13][14][...

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“…The interations result in formation of the ions solvation shells which move as the whole entity and which dimention and structure is temperature and ions concentration dependent. The mode coupling theory [51,52] was developed by Chandra and Bagchi for description the transport phenomena in electrolyte solutions. The phenomena, which mainly concern the collective dynamics such as ion atmosphere relaxation, or the ions pairing, are essentially driven by the ions concentration and the quantities related to the electric field applied: its intensity and frequency of oscilations.…”

Section: The Dashed Lines In Figs 3 and 4 Represent Two Components Ofmentioning

confidence: 99%

Frequency dependence of the ionic conductivity in water + ammonium nitrate electrolyte solutions

Płowaś

Świergiel

Jadżyn

2015

Electrochimica Acta

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Debye–Falkenhagen dynamics of electric double layer in presence of electrode heterogeneities

Cited by 59 publications

References 57 publications

Generalization of Randles-Ershler admittance for an arbitrary topography electrode: application to random finite fractal roughness

Generalization of Randles-Ershler admittance for an arbitrary topography electrode: application to random finite fractal roughness

Prediction of Charge-Discharge and Impedance Characteristics of Electric Double-Layer Capacitors Using Porous Electrode Theory

Frequency dependence of the ionic conductivity in water + ammonium nitrate electrolyte solutions

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