Optimal Charging and Discharging of Supercapacitors

AbdelAty, Amr M.; Fouda, Mohammed E.; Elbarawy, Menna T. M. M.; Radwan, Ahmed G.

doi:10.1149/1945-7111/aba1a6

Cited by 21 publications

(8 citation statements)

References 71 publications

(106 reference statements)

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“…So far, the highest achievable capacitance [13][14][15] and energy densities 16 have been obtained with nanometre-sized pores. Hence, an extensive research effort has been dedicated to understanding the properties of such nanoporous supercapacitors 12,[17][18][19][20][21][22][23][24][25][26][27] , with an overarching goal being to maximize the stored energy density [28][29][30][31][32][33][34][35] and the speed of charging and discharging [36][37][38][39][40][41][42][43][44] .…”

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confidence: 99%

How to speed up ion transport in nanopores

et al. 2020

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Electrolyte-filled subnanometre pores exhibit exciting physics and play an increasingly important role in science and technology. In supercapacitors, for instance, ultranarrow pores provide excellent capacitive characteristics. However, ions experience difficulties in entering and leaving such pores, which slows down charging and discharging processes. In an earlier work we showed for a simple model that a slow voltage sweep charges ultranarrow pores quicker than an abrupt voltage step. A slowly applied voltage avoids ionic clogging and co-ion trapping—a problem known to occur when the applied potential is varied too quickly—causing sluggish dynamics. Herein, we verify this finding experimentally. Guided by theoretical considerations, we also develop a non-linear voltage sweep and demonstrate, with molecular dynamics simulations, that it can charge a nanopore even faster than the corresponding optimized linear sweep. For discharging we find, with simulations and in experiments, that if we reverse the applied potential and then sweep it to zero, the pores lose their charge much quicker than they do for a short-circuited discharge over their internal resistance. Our findings open up opportunities to greatly accelerate charging and discharging of subnanometre pores without compromising the capacitive characteristics, improving their importance for energy storage, capacitive deionization, and electrochemical heat harvesting.

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confidence: 99%

How to speed up ion transport in nanopores

et al. 2020

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“…Nowadays, the demand for energy storage equipment is greatly increased due to the rapid development of the global economy, and the rapid consumption of fossil fuels such as coal, oil, and natural gas. The development and utilization of renewable and clean energy have received more and more attention, and new technologies for energy conversion and storage are urgently needed 1–3 . In recent years, supercapacitors have attracted wide attention as a new trend in energy storage applications compared to conventional capacitors and batteries because of their unique properties, such as higher energy storage capacity, high specific power, and good life cycle, etc 4–6 .…”

Section: Introductionmentioning

confidence: 99%

Flexible PEDOT/NiO@nickel foam composites materials for high‐performance supercapacitors

Shao,

Dong,

et al. 2023

Journal of Polymer Science

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High‐performance composite electrode materials for supercapacitors were developed by two‐step electrochemical deposition of nano‐NiO and poly(3,4‐ethylenedioxythiophene) (PEDOT) on nickel foam (NF). NF is considered an excellent conductive substrate for preparing porous electrode materials due to its high conductivity and porosity. The electrodeposited NiO nanoparticles were uniformly and densely coated on the pore of NF to fill in the internal voids, which provides an abundant active site for the electrodeposition of PEDOT. PEDOT was prepared by simple electrodeposition and was uniformly coated on the substrate surface which has high conductivity and reversible electrochemical redox properties, as well as excellent cyclic stability. The loose surface morphology not only provides abundant redox active sites for electrode material but also contributes the good pseudocapacitance property. As expected, the maximum mass‐specific capacity of PEDOT/NiO@NF composite electrode material can reach up to 129.7 F g−1 at the current density of 1 A g−1. Moreover, the composite electrode material shows excellent electrochemical cycling stability that the specific capacity has no obvious decay compared with its initial capacity after 200 cycles of cyclic voltammetry and 100 cycles of galvanostatic charge–discharge (GCD). This work demonstrates that the composite material PEDOT/NiO@NF could be a candidate flexibility electrode material for high‐performance supercapacitor applications.

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“…The inception of the fractional calculus extends to the time integer calculus was known. It has become omnipresent in various fields such as bioengineering [1,2], agriculture [3], viscoelasticity [4], filters [5,6,7], control theory [8], electronics [9], and circuits [10]. In the latter decades, Fractional Order Models FOM attracted the researchers' attention, because of being accurate and compact compared to their equivalent integer-order models [11].…”

Section: Introductionmentioning

confidence: 99%

Fractional diffusion equation with double and triple Laplace Adomian decomposition methods

2022

MSA Engineering Journal

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This paper aims to present an analytical and approximation method to get the solution of the space-time fractional diffusion equation. This suggested method is based on a combination of the double and triple Laplace transforms with the Adomain decomposition method. The presented methodology is tested on illustrative examples and the results show that it is a simple, efficient, and reliable method.

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Optimal Charging and Discharging of Supercapacitors

Cited by 21 publications

References 71 publications

How to speed up ion transport in nanopores

How to speed up ion transport in nanopores

Flexible PEDOT/NiO@nickel foam composites materials for high‐performance supercapacitors

Fractional diffusion equation with double and triple Laplace Adomian decomposition methods

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