Calorimetric measurement of the heat generated by a Double-Layer Capacitor cell under cycling

Pascot, C.; Dandeville, Y.; Scudeller, Y.; Guillemet, Philippe; Brousse, Thierry

doi:10.1016/j.tca.2010.06.022

Cited by 36 publications

(42 citation statements)

References 11 publications

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“…83,88,89,92,[220][221][222] The overall temperature rise corresponded to irreversible Joule heating, while temperature oscillations were attributed to reversible heating. 92,220,221 Temperature measurements at the surface of a 5000 F commercial EDLC during galvanostatic cycling showed that the overall temperature rise in a thermally insulated EDLC was approximately linear and proportional to I 2 s . 92 The reversible heat generation rate within an EDLC was empirically found to be exothermic during charging, endothermic during discharging, and proportional to I s .…”

Section: Thermal Modelingmentioning

confidence: 99%

“…220,226,227 Here also, most simulations considered the local temperature rise due only to irreversible heating but did not account for reversible heat generation. 89,90,220,226,227 The heat generation rate was prescribed as either (i) uniform throughout the entire device, 89,220,222,226,227 (ii) uniform in the "active components," i.e., the electrodes and separator, 226,227 or (iii) as having different values in the current collectors, electrodes, and separator. 90 Thermal models accounting for reversible heating 222 used the reversible heat generation rate in the electrolyte predicted by Schiffer et al 92 assumed to be uniform, i.e.,q rev =Q rev /V where V is the electrolyte volume.…”

Section: A5172mentioning

confidence: 99%

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

Pilon

Wang

d’Entremont

2015

J. Electrochem. Soc.

117

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: Thermal Modelingmentioning

confidence: 99%

Section: A5172mentioning

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.

117

105

View full text Add to dashboard Cite

show abstract

“…De Levie [11] developed a theory on the capacitance in each pore of porous electrodes being modeled as an RC transmission line. Previous thermal models predicted the thermal behavior of a UC by solving the transient heat conduction equation in one- [12], two- [13,14], or three-dimensional space [15][16][17]. Most of those thermal models [13,[15][16][17] neglected the reversible heat generation in a UC cell.…”

Section: Introductionmentioning

confidence: 99%

“…Previous thermal models predicted the thermal behavior of a UC by solving the transient heat conduction equation in one- [12], two- [13,14], or three-dimensional space [15][16][17]. Most of those thermal models [13,[15][16][17] neglected the reversible heat generation in a UC cell. Schiffer et al [18] showed that the heat generation in a UC cell consists of an irreversible Joule heat and a reversible heat caused by a change of entropy based on the analysis of the thermal measurement data obtained for a UC.…”

Section: Introductionmentioning

confidence: 99%

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Modeling of the Electrical and Thermal Behaviors of an Ultracapacitor

Lee

Kim

et al. 2014

Energies

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This paper reports a modeling methodology to predict the electrical and thermal behaviors of a 2.7 V/650 F ultracapacitor (UC) cell from LS Mtron Ltd. (Anyang, Korea). The UC cell is subject to the charge/discharge cycling with constant-current between 1.35 V and 2.7 V. The charge/discharge current values examined are 50, 100, 150, and 200 A. A three resistor-capacitor (RC) parallel branch model is employed to calculate the electrical behavior of the UC. The modeling results for the variations of the UC cell voltage as a function of time for various charge/discharge currents are in good agreement with the experimental measurements. A three-dimensional thermal model is presented to predict the thermal behavior of the UC. Both of the irreversible and reversible heat generations inside the UC cell are considered. The validation of the three-dimensional thermal model is provided through the comparison of the modeling results with the experimental infrared (IR) image at various charge/discharge currents. A zero-dimensional thermal model is proposed to reduce the significant computational burden required for the three-dimensional thermal model. The zero-dimensional thermal model appears to generate OPEN ACCESSEnergies 2014, 7 8265 the numerical results accurate enough to resolve the thermal management issues related to the UC for automotive applications without relying on significant computing resources.

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A Monolithic Silicon‐Mesoporous Carbon Photosupercapacitor with High Overall Photoconversion Efficiency

Berestok

Diestel

Ortlieb

et al. 2022

Adv Materials Technologies

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Off‐grid devices require autonomous power supply systems that can be achieved via coupling a solar cell with a supercapacitor in one integrated multifunctional device that is able to harvest energy from the environment, store, and release it on demand. Herein, a straight‐forward approach is proposed to realize a monolithic photosupercapacitor rechargeable under illumination by integrating a silicon (Si) solar cell with an electrochemical double‐layer capacitor (EDLC) based on mesoporous N‐doped carbon nanospheres (MPNC) in a three‐electrode configuration, i.e., via a shared electrode. The optimized porous structure of the MPNC‐EDLC electrodes results in a high storage efficiency of 95% and a superior performance compared to an activated carbon based EDLC. When monolithically integrated with a highly compatible and technologically robust Si solar cell in a photosupercapacitor, fast charging up to 0.63 V (2.5 V for a module of four photosupercapacitors connected in series) in less than 5 s is attained even under weak illumination conditions, with an outstanding peak overall efficiency of 11.8%. These results show high potential toward the development of photorechargeable and decentralized power sources for deployed smart electronic devices.

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Calorimetric measurement of the heat generated by a Double-Layer Capacitor cell under cycling

Cited by 36 publications

References 11 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

Modeling of the Electrical and Thermal Behaviors of an Ultracapacitor

A Monolithic Silicon‐Mesoporous Carbon Photosupercapacitor with High Overall Photoconversion Efficiency

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