Supercapacitors Characterization using Impedance Spectroscopy and taking account Dynamics Contraints and their combinations

Sarr, Cheikh Tidiane; Camara, Mamadou Baalo; Dakyo, Brayima

doi:10.1109/icrera47325.2019.8997005

Cited by 3 publications

(2 citation statements)

References 8 publications

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“…This means that the steam activation in this case only led to the improvement of the SABET and the pore volume (PV), without corresponding increase in the pore diameter (PD) which remained unchanged when compared with the nonactivated pyrochar. An ideal electrode material has two important characteristics: a high surface area and a high EC with lower resistance [34] that untimely affect the power output performance of an MFC. Interestingly, the specific surface area according to BET observed in this study for KAC was higher than that reported in the study of Azargohar and [35], probably because of a higher concentration of KOH used for activation at a higher nitrogen gas flow rate of 5 L min-1 in the present study.…”

Section: Surface Characteristics Of the Corncob Pyrocharsmentioning

confidence: 99%

Pyrolysis of Corncobs to Produce Biobased Conductive Materials as Electrodes for Potential Application in Microbial Fuel Cells (MFCs)

Bishir

Tariq

Straten

et al. 2021

IJRER

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Despite large varieties of commercially available electrodes, only few are suitable for electro-active bacterial colonization during biofilm formation in microbial fuel cells (MFCs), and most of these electrodes are cost prohibitive. Hence there is need to search for low-cost alternative electrodes for MFCs. Pyrochars were produced in this study by pyrolysis (600 °C and a continuous flow rate of 3 L/min of nitrogen gas for 30 min) and subsequently steam and potassium hydroxide (KOH) activation of the pyrochar at 600 °C were carried out accordingly. Physicochemical, structural, and electrochemical properties of the activated and non-activated pyrochars were determined according to standardized analytical methods. According to BET, 1626 m 2 g -1 surface area and 14.74 Å pore diameter were obtained from the KOH-activated pyrochar which was also the most conductive (0.26 S m -1 ). Chemical activation of pyrochar with KOH resulted in increased electrical conductivity (EC), pore diameter, and most importantly the material's surface area according to the findings. In conclusion, KOH-activated corncob pyrochar holds potentials for producing electrode materials with desirable characteristics for successful application in MFC compared to the non-activated and steam-activated pyrochars of the same biomass.

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Section: Surface Characteristics Of the Corncob Pyrocharsmentioning

confidence: 99%

Pyrolysis of Corncobs to Produce Biobased Conductive Materials as Electrodes for Potential Application in Microbial Fuel Cells (MFCs)

Bishir

Tariq

Straten

et al. 2021

IJRER

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“…There are two types of ageing mechanisms occuring within the supercapacitors systems (calandar and cycling) ageing. The calendar ageing happens with the passage of time and cannot be controlled due to chemical properties of the supercapacitors systems, whereas cycling ageing can be controlled [7]. The cycling ageing can be controlled by adapting the energy management algorithm to control the capacitance and resistance values of supercapacitors system be controlling the current ripple frequency of the system, therefore this article focuses on the desing of an energy management strategy which controls the fast ageing parameters of the supercapacitors system and can be used in many applications [8].…”

Section: Introductionmentioning

confidence: 99%

Supercapacitors Fast Ageing Control in Residential Microgrid Based Photovoltaic/Fuel Cell/Electric Vehicle Charging Station

2023

Self Cite

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The demand for microgrids and their applications in buildings, industries and for very specific applications is increasing over time. Most of these microgrids are dependent on renewable energy sources, which brings along problems of intermittent energy production. To maintain the balance of the grid, normally storage devices are used. Supercapacitors (SCs) are emerging as one of the potential solutions to solve the issue of intermittent energy production by renewable sources because of their high-power densities and rapid charge/discharge capability. In other terms, SCs can charge, and discharge rather quickly as compared to traditional lithium-batteries. This usage makes it interesting for optimizing decentralized energy generation-based PV systems operations. In this paper, the authors propose the supercapacitors fast ageing control in residential microgrid, including electric vehicle charging station based Photovoltaic-Fuel Cell system. Supercapacitors fast ageing control concept focuses on keeping the electrical parameters of the SCs around the optimal operation points by smoothing the power fluctuations in the system. The used SCs model is essentially based on the intermittent current waveforms along with variable temperature conditions. It enables us to describe the degradation of the supercapacitor’s parameters based on the effects of the temperature and the DC-current undulation. To maintain the electrical parameters of SCs around the optimal operation points, the authors propose a new control based on maintaining the SCs resistance at a minimal level and its capacitance at a maximal level by adjusting the SCs current control according to the optimal operating points tracking. The results validate the effectiveness of the approach, this is important because controlling the fast degradation of capacitance optimizes the lifetime of SCs system. Future research may explore scalability to large microgrids and integration with diverse renewable energy systems.

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Experimental Characterization of Hybrid Supercapacitor Under Different Operating Conditions Using EIS Measurements

Catelani,

Ciani,

Corti

et al. 2024

IEEE Trans. Instrum. Meas.

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Hybrid Supercapacitors (HSC) are innovative energy storage solutions that are becoming essential in many fields of applications. Their performances are strongly influenced by several parameters, such as temperature conditions, load characteristics and State-Of-Charge (SOC). For this reason, it is becoming fundamental to characterize their performances under different scenarios. One of the best ways to investigate the performances is by employing the Electrochemical Impedance Spectroscopy (EIS) measurement. However, since HSC is a recent technology, databases and studies focused on impedance analysis are not currently available in the literature. For this reason, this work presents the results of a large measurement campaign carried out to acquire impedance data on a large frequency range (from 1 mHz to 100 kHz) under different temperatures and SOC conditions. The constructed dataset has been used to investigate impedance anomalies and to analyze the effects that temperatures and SOC may have on the HSC impedance. The large obtained dataset can also be used for diagnostic and prognostic purposes.

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Supercapacitors Characterization using Impedance Spectroscopy and taking account Dynamics Contraints and their combinations

Cited by 3 publications

References 8 publications

Pyrolysis of Corncobs to Produce Biobased Conductive Materials as Electrodes for Potential Application in Microbial Fuel Cells (MFCs)

Pyrolysis of Corncobs to Produce Biobased Conductive Materials as Electrodes for Potential Application in Microbial Fuel Cells (MFCs)

Supercapacitors Fast Ageing Control in Residential Microgrid Based Photovoltaic/Fuel Cell/Electric Vehicle Charging Station

Experimental Characterization of Hybrid Supercapacitor Under Different Operating Conditions Using EIS Measurements

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