A review on electrochemical double-layer capacitors

Sharma, Pawan; Bhatti, T. S.

doi:10.1016/j.enconman.2010.06.031

Cited by 1,041 publications

(486 citation statements)

References 77 publications

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“…This complex system is called an electrical double layer (EDL) [1][2][3][4][5] . As its geometry and structure are similar to an electric capacitor, it is also called an electrical double layer capacitor (EDLC) [6][7][8] . Numerous studies of the EDL have explained many electrokinetic phenomena 9,10 , such as, electro-osmosis, electrophoresis and streaming current.…”

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confidence: 99%

Electrical power generation by mechanically modulating electrical double layers

et al. 2013

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made their great discovery of electromagnetic induction, there have been continuous developments in electrical power generation. Most people today get electricity from thermal, hydroelectric, or nuclear power generation systems, which use this electromagnetic induction phenomenon. Here we propose a new method for electrical power generation, without using electromagnetic induction, by mechanically modulating the electrical double layers at the interfacial areas of a water bridge between two conducting plates. We find that when the height of the water bridge is mechanically modulated, the electrical double layer capacitors formed on the two interfacial areas are continuously charged and discharged at different phases from each other, thus generating an AC electric current across the plates. We use a resistor-capacitor circuit model to explain the results of this experiment. This observation could be useful for constructing a micro-fluidic power generation system in the near future.

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confidence: 99%

Electrical power generation by mechanically modulating electrical double layers

et al. 2013

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“…One way to use the returned energy from braking is to store the energy it generates. Up to now, several methods have been proposed to store the energy generated by braking, such as using supercapacitors [16][17][18][19][20][21], flywheels [22][23][24][25][26] and batteries [27][28][29][30][31]. An exclusive review of these technologies can be found in [32].…”

Section: Introductionmentioning

confidence: 99%

An Integrated Energy-Efficient Operation Methodology for Metro Systems Based on a Real Case of Shanghai Metro Line One

Gong

Zhang

et al. 2014

Energies

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Metro systems are one of the most important transportation systems in people's lives. Due to the huge amount of energy it consumes every day, highly-efficient operation of a metro system will lead to significant energy savings. In this paper, a new integrated Energy-efficient Operation Methodology (EOM) for metro systems is proposed and validated. Compared with other energy saving methods, EOM does not incur additional cost. In addition, it provides solutions to the frequent disturbance problems in the metro systems. EOM can be divided into two parts: Timetable Optimization (TO) and Compensational Driving Strategy Algorithm (CDSA). First, to get a basic energy-saving effect, a genetic algorithm is used to modify the dwell time of each stop to obtain the most optimal energy-efficient timetable. Then, in order to save additional energy when disturbances happen, a novel CDSA algorithm is formulated and proposed based on the foregoing method. To validate the correctness and effectiveness of the energy-savings possible with EOM, a real case of Shanghai Metro Line One (SMLO) is studied, where EOM was applied. The result shows that a significant amount of energy can be saved by using EOM. OPEN ACCESSEnergies 2014, 7 7306

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“…Apparently, such a behaviour differs from those that occur in conventional types of capacitors. Thus, the traditional models used to describe the capacitor behaviour are inadequate to the electrochemical capacitors [1,2]. A number of equivalent circuit models of various complexity have been proposed to predict or describe SC behaviour models under numerous conditions in power storage applications required by designers and engineers, e.g.…”

Section: Introductionmentioning

confidence: 99%

Voltage Dependence of Supercapacitor Capacitance

Szewczyk¹,

Šikula²,

Sedláková³

et al. 2016

Metrology and Measurement Systems

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Electronic Double-Layer Capacitors (EDLC), called Supercapacitors (SC), are electronic devices that are capable to store a relatively high amount of energy in a small volume comparing to other types of capacitors. They are composed of an activated carbon layer and electrolyte solution. The charge is stored on electrodes, forming the Helmholtz layer, and in electrolyte. The capacitance of supercapacitor is voltage-dependent. We propose an experimental method, based on monitoring of charging and discharging a supercapacitor, which enables to evaluate the charge in an SC structure as well as the Capacitance-Voltage (C-V) dependence. The measurement setup, method and experimental results of charging/discharging commercially available supercapacitors in various voltage and current conditions are presented. The total charge stored in an SC structure is proportional to the square of voltage at SC electrodes while the charge on electrodes increases linearly with the voltage on SC electrodes. The Helmholtz capacitance increases linearly with the voltage bias while a sublinear increase of total capacitance was found. The voltage on SC increases after the discharge of electrodes due to diffusion of charges from the electrolyte to the electrodes. We have found that the recovery voltage value is linearly proportional to the initial bias voltage value.

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A review on electrochemical double-layer capacitors

Cited by 1,041 publications

References 77 publications

Electrical power generation by mechanically modulating electrical double layers

Electrical power generation by mechanically modulating electrical double layers

An Integrated Energy-Efficient Operation Methodology for Metro Systems Based on a Real Case of Shanghai Metro Line One

Voltage Dependence of Supercapacitor Capacitance

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