Analysis of Leakage Current Mechanism in Supercapacitor with Experimental Approach

Bairwa, Bansilal; Pareek, Kapil; Sarvagya, Mrinal; Yaragatti, Udaykumar R.

doi:10.1109/icaecc54045.2022.9716664

Cited by 14 publications

(5 citation statements)

References 27 publications

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“…When the supercapacitor is charged up to the nominal voltage followed by the removal of the voltage source, the device shows self-discharge through leakage current. The self-discharge of the pouch cell supercapacitor can be ascribed to the electrolyte decomposition and equivalent series resistance (ESR) in the cells . In our analysis, therefore, the leakage currents of the two pouch cells, PC1 and PC2, are calculated by using eq and are given in Table .…”

Section: Resultsmentioning

confidence: 99%

“…The self-discharge of the pouch cell supercapacitor can be ascribed to the electrolyte decomposition and equivalent series resistance (ESR) in the cells. 69 In our analysis, therefore, the leakage currents of the two pouch cells, PC1 and PC2, are calculated by using eq 11 and are given in Table 4. The practical durability and stability of the pouch cells were analyzed through GCD cycling for 10,000 cycles at 5 A current (see Figure 10(c)).…”

Section: Crystallinity and Microstructure Of Coal-derived Porous Carbonmentioning

confidence: 99%

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Coal-Derived Porous Carbon as Versatile Electrode Materials for Aqueous, Water-in-Salt, and Organic Electrolytes, and Fabrication of Pouch Cell Supercapacitor toward Power Application

Benoy,

Hazarika,

Bora

et al. 2024

ACS Appl. Energy Mater.

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This study focuses on the comprehensive analysis of porous carbon derived from coal feedstock for advanced applications in fabricating pouch cell supercapacitor prototypes. A simple chemical activation technique was employed to produce high-performance porous carbon, followed by assembly of the pouch cell supercapacitor prototype for power applications. The performance of the prototype was thoroughly analyzed by using electrochemical characterization techniques, including cycling stability assessment. The coal-based porous carbon exhibited high surface area (1480 m 2 /g), high porosity (0.66 cm 3 /g), and excellent electrochemical properties. Maximum specific capacitance values obtained for coal-derived porous carbon in aqueous, water-in-salt electrolyte (WIS), and organic electrolytes were 190, 127, and 93 F/g, respectively, revealing the excellent versatility of the material. Additionally, the supercapacitor demonstrated maximum power and energy density of 13.7 kW/kg and 23.3 Wh/kg, respectively, in the organic electrolyte. Two fabricated coal-based pouch cell supercapacitors (100F/2.7V) were also compared with a commercial supercapacitor. The coal-based pouch cell exhibited gravimetric specific energy and usable specific power of 4.5 Wh/kg and 736 W/kg, respectively, with a cycling stability of approximately 90% after 10,000 cycles. These coal-based pouch cell supercapacitors were successfully demonstrated for use in lighting a string of LEDs (4.5 V). Overall, the research findings highlight the potential of coal-derived porous carbon as an efficient electrode material for supercapacitor applications, offering a promising pathway for utilizing abundant coal resources in sustainable energy storage applications.

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Section: Resultsmentioning

confidence: 99%

Section: Crystallinity and Microstructure Of Coal-derived Porous Carbonmentioning

confidence: 99%

Coal-Derived Porous Carbon as Versatile Electrode Materials for Aqueous, Water-in-Salt, and Organic Electrolytes, and Fabrication of Pouch Cell Supercapacitor toward Power Application

Benoy,

Hazarika,

Bora

et al. 2024

ACS Appl. Energy Mater.

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show abstract

“…The circuit consists of the basic electrical component which is the resistor and capacitor which either can exist as a single component or multiple components and also can be either connected in series or parallel [26]. There is various type of proposed ECM of supercapacitor which is the classical model, resistor-capacitor (RC) branch ECM which is two branch ECM and three branch ECM, ladder ECM, transmission line model, multi branch model and dynamic model [25], [27]- [30]. However, parameter identification still needs the help of experimental data.…”

Section: Equivalent Circuit Modelmentioning

confidence: 99%

“…However, it will start to become linear after a long time the supercapacitor in the self-discharge state as seen in Figure 2. In [27], self-discharge study was made and the simulation was done by the implementation of three branch ECM. The parameter extraction is done based on Maxwell BCAP350 350F supercapacitor where the SC is charged and let discharge in an open circuit condition using CH760E electrochemical workstation.…”

Section: Three Branch Equivalent Circuit Modelmentioning

confidence: 99%

The different approach for supercapacitor modelling in the perspective of self-discharge study

Bakar

Romli

Yaakob

et al. 2022

IJEECS

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Supercapacitor is a relatively new type of electric component used to store energy compared to a battery. Supercapacitor charge and discharge cycle are faster compared to the battery along with higher power density which increase its application in recent years. However, supercapacitors have quite high self-discharge compared to batteries. This makes energy stored in supercapacitor decrease faster over time when not in use. Various study has been done towards the self-discharge behavior of SC which is both experimentally and in simulation. The simulation is done by various methods and models which have been proposed by previous researchers. Most of the methods that have been used were based on the Equivalent Circuit Model as it is the easiest method available. However, there is still another method proposed such as the Fractional-order model. This paper will review some of the methods and models used to study self-discharge behavior.

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“…Different equivalent circuit models resulting in different numbers of parameter available that needed to be extract through various type of experiment. The Parameter extraction of the three branch equivalent circuit model for supercapacitor are based on the calculation that heavily depend on the experiment of self-discharge measurement or the charging and discharging measurement [11], [14]- [17]. The parameter identification for the supercapacitor is crucial as it reflect the modelling of the supercapacitor.…”

mentioning

confidence: 99%

Supercapacitor’s Parameter Calculation based on Three Branch Equivalent Circuit Model under Different Constant Charging Current

Jabbar

Fahmi

Yaakob

et al. 2023

J. Phys.: Conf. Ser.

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Supercapacitor is a type of energy storage with higher capacitance value compared to the normal capacitor. But it has lower voltage level compared to normal capacitor. However, it can be charged with high current and provide higher current to the load when needed when compared to the same size energy storage such as battery. The Three Branch Equivalent Circuit is one of the simple yet accurate model that has been proposed. The parameter of the Three Branch model included the capacitance, resistance and a unit of voltage dependent capacitance. The Parameter needed to be calculated accurately as it depends heavily on the terminal voltage of the supercapacitor at respective time which obtained through a charging and self-discharging experiment under constant current charging. The different constant charging current give effect toward the parameter calculation as it manipulates the rate of charging and self-discharging. This paper will calculate the parameter of supercapacitor based on the Three Branch model under different constant charging current and compared the result using the simulation to show the accuracy of the model. The parameter obtained throughout the study shows a high accuracy especially the parameters obtained using higher charging current.

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Analysis of Leakage Current Mechanism in Supercapacitor with Experimental Approach

Cited by 14 publications

References 27 publications

Coal-Derived Porous Carbon as Versatile Electrode Materials for Aqueous, Water-in-Salt, and Organic Electrolytes, and Fabrication of Pouch Cell Supercapacitor toward Power Application

Coal-Derived Porous Carbon as Versatile Electrode Materials for Aqueous, Water-in-Salt, and Organic Electrolytes, and Fabrication of Pouch Cell Supercapacitor toward Power Application

The different approach for supercapacitor modelling in the perspective of self-discharge study

Supercapacitor’s Parameter Calculation based on Three Branch Equivalent Circuit Model under Different Constant Charging Current

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