Effects of the composition of active carbon electrodes on the impedance performance of the AC/AC supercapacitors

Sopčić, Suzana; Antonić, Davor; Mandić, Zoran

doi:10.1007/s10008-021-05112-8

Cited by 7 publications

(2 citation statements)

References 67 publications

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“…Figure 13 and Figure 14 show the CV responses of supercapacitors with different hydrogel electrolytes. The nearly constant current value registered during supercapacitor charging is related to the continuous electrochemical double layer charging by increasing the voltage [ 74 , 75 , 76 ]. In each case, a nearly rectangular response was obtained, indicating good capacitive behavior.…”

Section: Resultsmentioning

confidence: 99%

Cellulose-g-poly(2-(dimethylamino)ethylmethacrylate) Hydrogels: Synthesis, Characterization, Antibacterial Testing and Polymer Electrolyte Application

Blažic

Grgić

Roković

et al. 2022

Gels

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Hydrogels have been investigated due to their unique properties. These include high water content and biocompatibility. Here, hydrogels with different ratios of poly(2-(dimethylamino)ethylmethacrylate) (PDMAEMA) were grafted onto cellulose (Cel-g-PDMAEMA) by the free radical polymerization method and gamma-ray radiation was applied in order to increase crosslinking and content of PDMAEMA. Gamma irradiation enabled an increase of PDMAEMA content in hydrogels in case of higher ratio of 2-(dimethylamino)ethyl methacrylate in the initial reaction mixture. The swelling of synthesized hydrogels was monitored in dependence of pH (3, 5.5 and 10) during up to 60 days. The swelling increased from 270% to 900%. Testing of antimicrobial activity of selected hydrogel films showed weak inhibitory activity against Escherichia coli, Pseudomonas aeruginosa, and Bacillus subtilis. The results obtained by the cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) indicate that chemically synthesized hydrogels have good characteristics for the supercapacitor application.

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Section: Resultsmentioning

confidence: 99%

Cellulose-g-poly(2-(dimethylamino)ethylmethacrylate) Hydrogels: Synthesis, Characterization, Antibacterial Testing and Polymer Electrolyte Application

Blažic

Grgić

Roković

et al. 2022

Gels

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“…Developing effective energy storage devices is crucial in the progression of renewable energy. , Supercapacitors are highly sought after due to their substantial energy storage capacity, high-power density, and extended cycling durability. They find extensive use in various electronic products that require rapid charging and discharging. − Activated carbon (AC) stands as one of the most extensively utilized materials in supercapacitors. − However, AC inherently exhibits relatively low electronic conductivity, so conductive additives are added to improve the electrode’s electrical conductivity, reduce its electrochemical impedance, and enhance the electrochemical performance of the supercapacitors. − Some of the widely used conductive additives in the market include acetylene black (ACET), ketjenblack (KB), and carbon nanotubes (CNT) . However, they have relatively lower electrical conductivity and are expensive (especially KB), which constrains their potential as conductive additives for commercial applications.…”

Section: Introductionmentioning

confidence: 99%

A Three-Dimensional Points–Lines–Planes Interweaved Conductive Additive with Ultrahigh Electron Transfer for High-Performance Supercapacitors

Han,

Shi,

Wei

et al. 2024

ACS Appl. Energy Mater.

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Conductive additives play a crucial role in the electrochemical performance of supercapacitors, particularly in the delivery of energy under high-power conditions. A three-dimensional supercapacitor composite conductive additive, 3D-ACET-CNT-MXene (3D-ACM-1), has been successfully developed in this study by combining traditional conductive additives acetylene black (ACET) and CNT@MXene materials. In this structure, ACET acts as the conductive active site; CNT serves as the connecting conductive network between ACET and MXene; and MXene sheets function as the conductive plane, providing loading sites for ACET particles. These three components synergistically form a threedimensional conductive network composed of points, lines, and planes. This three-dimensional conductive network effectively facilitates electron transfer and promotes electrochemical reactions, significantly enhancing the rate capability of the electrode material at high current densities. While ensuring the highest conductivity, 3D-ACM-1 controls smaller production costs compared to the pricier ECP-600JD material. Importantly, 3D-ACM-1 effectively addresses the dispersion issues of MXene in organic phases and dry electrode preparation. It can directly replace commercial conductive additives in coating processes for industrial electrode materials without any alterations. Therefore, this work holds significant importance for the manufacturing of low-cost, high-performance supercapacitor products.

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Analysis of the effect of different factors on the degradation of supercapacitors

Poonam

Pareek

Jangid

2022

Ionics

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Effects of the composition of active carbon electrodes on the impedance performance of the AC/AC supercapacitors

Cited by 7 publications

References 67 publications

Cellulose-g-poly(2-(dimethylamino)ethylmethacrylate) Hydrogels: Synthesis, Characterization, Antibacterial Testing and Polymer Electrolyte Application

Cellulose-g-poly(2-(dimethylamino)ethylmethacrylate) Hydrogels: Synthesis, Characterization, Antibacterial Testing and Polymer Electrolyte Application

A Three-Dimensional Points–Lines–Planes Interweaved Conductive Additive with Ultrahigh Electron Transfer for High-Performance Supercapacitors

Analysis of the effect of different factors on the degradation of supercapacitors

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