Simulation of cyclic voltammetry in structural supercapacitors with pseudocapacitance behavior

Aderyani, Sarah; Flouda, Paraskevi; Shah, Smit A.; Green, M.J.; Lutkenhaus, Jodie L.; Ardebili, Haleh

doi:10.1016/j.electacta.2021.138822

Cited by 60 publications

(28 citation statements)

References 79 publications

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“…Redox peaks appeared both at low and high scan rates in the voltammograms. The voltammograms of pseudocapacitors are usually quasi‐rectangular with redox peaks 72 …”

Section: Resultsmentioning

confidence: 99%

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An ultrahigh‐energy density and wide potential window aqueous electrolyte supercapacitor built by polypyrrole/aniline 2‐sulfonic acid modified carbon felt electrode

Yazar

Arvas

Şahin

2022

Intl J of Energy Research

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Summary In this study, excellent performance and wide operating voltage are obtained with an aqueous electrolyte. Aqueous electrolytes are attracted more attention than other electrolytes (such as organic solvents, ionic liquids) in supercapacitor applications because of their safety, low cost, nontoxicity. Polypyrrole (PPy), aniline 2‐sulfonic acid (ASA) modified electrodes are hydrothermal synthesized on carbon felt (CFt) for supercapacitor applications. We investigate the presence of the concentration of ASA on the polymerization of the PPy. Furthermore, a high operating voltage of 3.0 V asymmetric supercapacitor (ASC) with graphite plate is assembled 3 M KCI. CFt/PPy/ASA(0.02)//GP exhibits a high specific capacitance value of 902.9 F g−1 at 5 mV s−1 and after 5000 cycle‐life testing 93.6% capacitance retention at a scan rate of 1000 mV s−1. The assembled ASC has an ultrahigh‐energy density of 1005 Wh kg−1 while delivering a power density of 3000 W kg−1 at a current density of 2 A g−1. The effect of ASA concentration on the supercapacitor performance has been observed.

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“…Redox peaks appeared both at low and high scan rates in the voltammograms. The voltammograms of pseudocapacitors are usually quasi‐rectangular with redox peaks 72 …”

Section: Resultsmentioning

confidence: 99%

“…The voltammograms of pseudocapacitors are usually quasi-rectangular with redox peaks. 72 The charge-discharge rates of conductive polymers are generally low. There are several possible reasons for this situation.…”

Section: Electrochemical Performance Of Supercapacitor Devicementioning

confidence: 99%

An ultrahigh‐energy density and wide potential window aqueous electrolyte supercapacitor built by polypyrrole/aniline 2‐sulfonic acid modified carbon felt electrode

Yazar

Arvas

Şahin

2022

Intl J of Energy Research

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“…In this regard, the use of an equivalent resistance-capacitor circuit is one of the most widely used methods for tracking voltammograms, which connects the desired number of resistors and capacitors in series or parallel. However, resistor-capacitor circuit models with shortcomings such as ion diffusion, non-uniform ion concentration in electrolytes, and electrode morphology are ignored [46]. Generally, the Poisson-Nernst-Planck equation (3.13) is used to calculate the ion transfer across the electrolyte.…”

Section: Mathematical Models In Supercapacitorsmentioning

confidence: 99%

“…Generally, the Poisson-Nernst-Planck equation (3.13) is used to calculate the ion transfer across the electrolyte. The local electric potential E (x,t) in the diffuse layer for binary electrolyte solution is determined by the one-dimensional Poisson equation as [43]- [46].…”

Section: Mathematical Models In Supercapacitorsmentioning

confidence: 99%

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Mathematical Modeling Application in Energy Conversion and Energy Storage

Delibaş

HOSSEİNİ²,

NİAİE³

2022

Journal of Mathematical Sciences and Modelling

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This article reviews mathematical modeling applications in energy conversion and energy storage. In the first section, the primary emphasis is on energy conversion, mainly focusing on solar cells and fuel cells' structure and methods of modeling and prediction of their performances. Modeling of Perovskite solar cell modules is one of the major components responsible for the proper functioning of PV systems. Modeling provides ways to understand PV modules' current, voltage, and power relationships. However, the estimation of models is affected by various intrinsic and extrinsic factors, which ultimately influence current and voltage behavior. Therefore, perfect modeling is essential to estimate the performance of PV modules in different environmental conditions. In the second section, the major emphasis is on energy storage focuses on modeling the structure and performance of batteries and supercapacitors. Supercapacitors and batteries are electrochemical energy storage devices that can be charged in a matter of seconds to minutes. This efficient storage of energy is based on the adsorption of an electrolyte to a high-surface-area electrode. These marvelous properties led to extensive concerted research into the nature of the storage mechanism, electrode design, and especially new optimized materials. Mathematical modeling has become an effective method in energy storage science, contributing to the development and optimization of electric generators and energy storage devices. It is thus a suitable method for analyzing a battery and supercapacitor’s performance and investigating its mechanism. The simulation is performed in two steps because of the multi-physics nature of energy conversion and storage systems. In the first step, the semiconductor equations are applied, and the electrical response of the electrochemical device is modeled. The second step calculates the thermal equations, while the heat generated in the first step is used as the heat source.

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