Characterization of equivalent series resistance of electric double-layer capacitor electrodes using transient analysis

Yoon, Seung Soo; Lee, Chul Wee; Oh, Seung M.

doi:10.1016/j.jpowsour.2010.01.086

Cited by 52 publications

(57 citation statements)

References 25 publications

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“…RC circuit and homogeneous models.-Numerous equivalent RC circuit models [53][54][55][56][57] have been proposed and used to numerically investigate and predict the performance of EDLCs. They include but are not limited to (i) the simple series RC circuit, (ii) the so-called classical equivalent circuit 58 consisting of a resistor in parallel with a capacitor with an additional resistance in series, (iii) the three branch model with one voltage-dependent capacitance, 59 and (iv) the transmission line network model with an arbitrary number of equivalent RC circuit stages.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Continuum Modeling of Interfacial and Transport Phenomena in Electric Double Layer Capacitors

Pilon

Wang

d’Entremont

2015

J. Electrochem. Soc.

114

105

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This paper reviews recent advances in physical modeling of interfacial and transport phenomena in electric double layer capacitors (EDLCs) under both equilibrium and dynamic cycling. The models are based on continuum theory and account for (i) the Stern layer at the electrode/electrolyte interface, (ii) finite ion sizes, (iii) steric repulsions, (iv) asymmetric electrolytes featuring ions with different valencies, effective diameters, or diffusion coefficients, (v) electric-field-dependent dielectric permittivity of the electrolyte, and/or (vi) porous three-dimensional morphology of the electrodes. Typical characterization methods such as electrochemical impedance spectroscopy, cyclic voltammetry, and galvanostatic cycling were reproduced numerically to identify the dominant physical phenomena and to gain insight into experimental observations. In addition, recent thermal models derived from first principles for EDLCs under constant-current cycling accounting for irreversible Joule heating and reversible heat generation rates due to ion diffusion, steric effects, and changes in entropy are discussed. Scaling analyses of both equilibrium and dynamic models are also presented as a way to identify self-similar and asymptotic behaviors as well as to develop design rules for electrodes and electrolytes of next generation EDLCs. Electrical double layer capacitors (EDLCs) store energy by ion adsorption in the electrical double layer (EDL) forming at the electrode/electrolyte interfaces.1,2 This process is highly reversible and the cycle life of EDLCs exceeds 100,000 cycles.2,3 EDLCs can operate in a wide range of specific energy and power densities. This versatility is a key feature for electrical energy storage, energy harvesting, and energy regeneration applications. 2The performance of EDLCs is determined by the combination of the electrode material and morphology and of the electrolyte. In general, the key attributes of a good electrode include 1,3-7 (i) large surface area accessible to ions to maximize charge storage, (ii) optimum pore size, short pore length, and good pore connectivity to facilitate ion transport, (iii) large electrical conductivity to enable fast charging and discharging and low ohmic resistance, (iv) thin electrodes and current collectors to reduce the total resistance of the device, (v) small leakage current, (vi) small self-discharge, (vii) environmentally friendly materials, and (viii) low price. However, satisfying all these criteria simultaneously is challenging. For example, increasing surface area often results in larger electrode electrical resistivity.1 Micropores with diameter less than 2 nm contribute greatly to EDLCs capacitance.2 But pores smaller than the ion size are typically inactive and do not contribute to charge storage. 1,8 Porous electrodes must also be electrochemically accessible to ions. Then, interconnected mesopores with diameter ranging from 2 to 50 nm are necessary for fast charging thanks to their easier accessibility to ions. 1,6,[9][10][11] In practice, electrode...

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Section: Introductionmentioning

confidence: 99%

Recent Advances in Continuum Modeling of Interfacial and Transport Phenomena in Electric Double Layer Capacitors

Pilon

Wang

d’Entremont

2015

J. Electrochem. Soc.

114

105

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“…This kind of information will also be beneficial for the application of EDL capacitors. The dynamics of EDL-FETs with a polymer 3 electrolyte has been studied as a drain current transient 3 as well as the transient characteristics of EDL capacitors 14,15 , which was interpreted as a result of a simple capacitance-resistance (CR) product. Accordingly, the frequency response of liquid electrolytes has been studied using a capacitance analyzer 4,11,14 .…”

Section: Introductionmentioning

confidence: 99%

Solvent Effects on the Transient Characteristics of Liquid-Gate Field Effect Transistors with Silicon Substrate

Yanase¹,

Hasegawa²,

Nagahama³

et al. 2012

Jpn. J. Appl. Phys.

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The transient characteristics of EDL-gated field effect transistors with Si as an active semiconductor were studied using various electrolyte solutions of LiBF4 by applying a step-function voltage in order to determine the optimum electrolyte for semiconductor circuits using EDL. The tR, determined by EDL dynamics in the present experiment, showed a minimum as a function of the solvent due to the competing effects of the EDL thickness and viscosity. The tR of the electrolyte solutions with various solvents at the same concentration were classified into three categories: slow response of a complexforming solvent, medium response of protic solvents and fast response of nonprotic solvents. The best response time was 55 s when a 1.0 M acetonitrile solution was used as the liquid-gate insulator.2

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“…10a. Here, the total impedance of the electrolyte (Z e (f)) can be expressed from transmission line model (TLM) [30][31][32].…”

mentioning

confidence: 99%

“…Here R t and s are and the total electrolyte resistance in the pores and time constant for electrolyte charging within pores, respectively [30]. In the circuit description code (CDC) expression by Boukamp, Eq.…”

mentioning

confidence: 99%

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Pore structure tuning of mesoporous carbon prepared by direct templating method for application to high rate supercapacitor electrodes

Yoon

Lee

et al. 2011

Journal of Electroanalytical Chemistry

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Characterization of equivalent series resistance of electric double-layer capacitor electrodes using transient analysis

Cited by 52 publications

References 25 publications

Recent Advances in Continuum Modeling of Interfacial and Transport Phenomena in Electric Double Layer Capacitors

Recent Advances in Continuum Modeling of Interfacial and Transport Phenomena in Electric Double Layer Capacitors

Solvent Effects on the Transient Characteristics of Liquid-Gate Field Effect Transistors with Silicon Substrate

Pore structure tuning of mesoporous carbon prepared by direct templating method for application to high rate supercapacitor electrodes

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