Supercapacitors: Old Problems and New Trends

Maletin, Yurii A.; Изотов, В С; Mironova, A. A.; Kozachkov, Sergey G.; Danilin, V. V.; Podmogilny, Sergey

doi:10.1007/1-4020-4812-2_5

Cited by 5 publications

(2 citation statements)

References 4 publications

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“…The electrochemical signature of the 0.68 nm pore size sample in the 2 M EMI,BF 4 in AN electrolyte shows a typical capacitive behaviour for both the anion and cation adsorption, thus demonstrating that a careful selection of the electrolyte/carbon couple is needed to optimise the charge storage in carbon nanopores. In our previous studies [19] and work of others [20], optimisation of capacitance has been done by changing the pore size of CDC. We show here that it is also possible to tune the electrolyte composition to match a specific pore size of the carbon electrode.…”

Section: Additions Of Emibf 4 To Emitfsi-based Electrolytementioning

confidence: 99%

Steric effects in adsorption of ions from mixed electrolytes into microporous carbon

Ségalini

Iwama

Taberna

et al. 2012

Electrochemistry Communications

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International audienceWith the goal to improve the capacitance in electrochemical double-layer capacitors (EDLCs) many studies on pore size/ion size relationship have been undertaken to achieve a better understanding of the charge storage mechanism in the electrochemical double-layer in confinement. A significant capacitance increase was achieved by using carbon electrodes with micropores (b1 nm), when the carbon pore size was close to the ion size. In this paper, the accessibility of narrow pores is investigated by selecting a carbon with a small pore size (b0.7 nm) and electrolyte mixtures with different ion sizes. It has been shown that the adsorption capacitance limitation observed for large cations and anions could be overcome by adding ions with a smaller effective size. This result demonstrates that the pores are accessible when their size matches the effective ion size and contradicts the surface saturation assumption; effective ion size which exceeds the pore size leads to current limitation. This work confirms that the steric effect is involved when ions are adsorbed into pores and highlights the importance of controlling ion size/pore size relationship for optimisation of the capacitive performance of EDLC devices

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Section: Additions Of Emibf 4 To Emitfsi-based Electrolytementioning

confidence: 99%

Steric effects in adsorption of ions from mixed electrolytes into microporous carbon

Ségalini

Iwama

Taberna

et al. 2012

Electrochemistry Communications

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“…According to reports, it can depend on many factors: (i) size of pores of the activated carbon material, (ii) composition of the material used for production of the energy-storage electrode component, (iii) electrolyte composition, and (iv) thickness of the energy-storage electrode component. To reduce the SC R in value, several cost-effective and simple methods were explored for solving this challenge from the industry technological views5678. Though decades of sustained efforts, it is still a very hot study field and still need substantial progress on developing new technologies for reducing the R in .…”

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Experimental and theoretical studies of nonlinear dependence of the internal resistance and electrode thickness for high performance supercapacitor

Liu

Dai

Wei

et al. 2017

Sci Rep

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In this study, the internal resistance with the increasing of electrode thickness in a typical nanoporous carbon-based supercapacitor and their corresponding electrochemical performances were designed and investigated in detail. As for the carbon-based double electrode layer electrochemical system, electrochemical experiments greatly support the fact of nonlinear dependence and indicate that the curve of internal resistance vs. electrode thickness can have a minimum value when the thickness increasing from 10 to 140 μm. To explain the underlying mechanisms responsible for the nonlinear dependence, a theoretical model based on a porous electrode/electrolyte electrochemical system was proposed. As expected, the results of calculations carried out in the framework of the proposed model can be very good agreement with the experimental data. According to the calculation, the optimized electrode thickness is 53.1 μm corresponding to the minimum value of SC internal resistance. Obviously, the current research results might greatly support the nonlinear conclusion instead of linear relationship between the internal resistance and the electrode thickness and may shed some light on the fabrication and exploration of supercapacitors with high power density.

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Some Aspects of Preparations and Applications of Electrochemical Double‐Layer Capacitors (Supercapacitors)

Kolosov

Изотов

Kolosova

et al. 2021

Handbook of Supercapacitor Materials

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Supercapacitors: Old Problems and New Trends

Cited by 5 publications

References 4 publications

Steric effects in adsorption of ions from mixed electrolytes into microporous carbon

Steric effects in adsorption of ions from mixed electrolytes into microporous carbon

Experimental and theoretical studies of nonlinear dependence of the internal resistance and electrode thickness for high performance supercapacitor

Some Aspects of Preparations and Applications of Electrochemical Double‐Layer Capacitors (Supercapacitors)

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