Modeling the dynamic behavior of supercapacitors using impedance spectroscopy

Buller, S.; Karden, Eckhard; Kok, Daniël; Doncker, Rik W. De

doi:10.1109/ias.2001.955972

Cited by 61 publications

(57 citation statements)

References 4 publications

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“…The inset is the corresponding equivalent circuit, where R s is the solution resistance, R ct is the interfacial charge transfer resistance and W s is the Warburg impedance. The calculated values of equivalent series resistance (ESR, R s +R ct ) are 28, 50 and 400 Ω for Ni@rGO, Ni@rGO@MnO 2 and Ni@MnO 2 FEs, respectively [42,43]. The cycle stability of Ni@rGO@MnO 2 FE was measured at a current density of 1 mA cm −2 in 1 mol L −1 Na 2 SO 4 .…”

Section: Resultsmentioning

confidence: 99%

Flexible all-solid-state micro-supercapacitor based on Ni fiber electrode coated with MnO2 and reduced graphene oxide via electrochemical deposition

Zhou

Chen

et al. 2018

Sci. China Mater.

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Section: Resultsmentioning

confidence: 99%

Flexible all-solid-state micro-supercapacitor based on Ni fiber electrode coated with MnO2 and reduced graphene oxide via electrochemical deposition

Zhou

Chen

et al. 2018

Sci. China Mater.

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“…Experimental studies show that both the frequency characteristics and transient states in such systems differ from the characteristics and waveforms occurring in classic, integer-order RLC circuits [1,5]. For systems containing supercapacitors, these differences are mainly due to their electrochemical construction [8].…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Transient State in a Series Circuit of the Class $$RL_{\beta }C_{\alpha }$$ R L β C α

Jakubowska¹,

Walczak²

2016

Circuits Syst Signal Process

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Results of analysis of transient states in a series circuit of the class RL β C α , supplied by an ideal voltage source, have been described in the paper. This circuit consists of a coil L β and a supercapacitor C α described by fractional-order differential equations. A method for determining the current and voltage waveforms in the analyzed circuit, based on the decomposition of rational functions into partial fractions, has been described. This method allows to determine transient waveform shapes in the system for any kind of voltage excitation. Two cases of the problem solutions have been considered. The first case concerns a situation where poles of rational functions are real, and the second where rational functions have complex poles. Effective relations enabling the determination of transient waveforms in a closed form have been given. Analytical formulae describing transient state waveforms in the system for different types of voltage excitations: constant, monoharmonic, periodic and arbitrary being an element of a Hilbert space, have been determined, too. The obtained results have been illustrated by an example.

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“…Several models can be used to describe the dynamical behaviour of an ultracapacitor, as explained in [31,32]. Of these, the simplest approach is the first-order RC model shown in Figure 5, which contains an equivalent series resistance R ucs , the capacitance C uc and a parallel resistance R ucp that models the self-discharge of the ultracapacitor.…”

Section: Model Of the Ultracapacitorsmentioning

confidence: 99%

Control Scheme of a Concentration Photovoltaic Plant with a Hybrid Energy Storage System Connected to the Grid

Roncero‐Sánchez

Torres²,

Vázquez

2018

Energies

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Abstract:In the last few decades, renewable energy sources (RESs) have been integrated into the electrical grid in order to curb the deficiency of energy owing to, among other factors, the depletion of fossil fuels and the increasing awareness of climate change. However, the stochastic nature of these sources, along with changes in levels of energy consumption, signifies that attention now needs to be paid for energy storage systems (ESSs). One of the most promising RESs is concentration photovoltaic (CPV) energy, owing to the high efficiency obtained and its sustainability regarding environmental issues. However, as CPV systems work only with direct solar radiation, they require ESSs in order to smooth the variations in the energy generated. This paper deals with the integration into the grid of a CPV plant that employs a hybrid ESS (HESS) based on ultracapacitors and batteries. The HESS allows the complete system to inject a constant active power level into the grid and thus flatten the profile of the energy generated. This goal is achieved by using a power electronic topology based on various DC-DC converters and a DC-AC converter, both of which share the same DC link. The control system is tailored in order to decouple the active-power and the reactive-power injections. Simulation results obtained using PSCAD/EMTDC (Power System Computer Aided Design/Electromagnetic Transient Direct Current) show the resulting performance of a 200 kW CPV plant with a hybrid ESS.

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Modeling the dynamic behavior of supercapacitors using impedance spectroscopy

Cited by 61 publications

References 4 publications

Flexible all-solid-state micro-supercapacitor based on Ni fiber electrode coated with MnO2 and reduced graphene oxide via electrochemical deposition

Flexible all-solid-state micro-supercapacitor based on Ni fiber electrode coated with MnO2 and reduced graphene oxide via electrochemical deposition

Analysis of the Transient State in a Series Circuit of the Class $$RL_{\beta }C_{\alpha }$$ R L β C α

Control Scheme of a Concentration Photovoltaic Plant with a Hybrid Energy Storage System Connected to the Grid

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