Activated Carbon for Supercapacitors

Chang, Sook Keng; Zainal, Zulkarnain

doi:10.1016/b978-0-12-815757-2.00012-7

Cited by 7 publications

(3 citation statements)

References 70 publications

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“…Among all the potential uses of activated carbons, such as catalyst or catalyst support [Sadashiv Bubanale and Shivashankar, 2017], pollutant adsorption (Alguacil et al, 2018;Alcaraz et al, 2019Alcaraz et al, , 2020, or hydrogen production (Tsyntsarski et al, 2015;Prabu et al, 2019), their application in energy storage as electrodes for electrochemical double-layer capacitors (EDLCs) (Chang and Zainal, 2019) has attracted an immense interest from the scientific community.…”

Section: Introductionmentioning

confidence: 99%

RETRACTED: Activated Carbons From Winemaking Biowastes for Electrochemical Double-Layer Capacitors

et al. 2020

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Revalorizing organic biowaste is critical to achieve a full circular economy, where waste is transformed into resources. One of the main strategies is to produce activated carbons and use them as functional materials for electrochemical energy storage. In this study, winemaking wastes, bagasse (BAG), and cluster stalks (CS) were recovered and used in the preparation of activated carbons by a hydrothermal process. Then, they were chemically activated using KOH and investigated for electrochemical capacitor applications. The activation treatment resulted in microporous structures, characterized by a type I isotherm for low partial pressures (P/P 0), and a type IV for higher pressures, as observed by Brunauer-Emmett-Teller surface analysis, with specific surfaces of 1,861 and 2,662 m 2 •g −1 for BAG and CS, respectively. These microporous structures were also investigated by means of scanning electron microscopy, revealing a high porous degree. Micro-Raman spectroscopy and X-ray photoelectron spectroscopy measurements displayed bands associated to disorder of the structure of the carbonaceous material. The electrochemical performance of the resulting materials was investigated for electrochemical energy storage applications, as supercapacitor electrode, in 1 M KOH aqueous electrolyte. These biowaste-derived materials displayed electrochemical double-layer capacitance, with 129 F•g −1 at 10 A•g −1 in the 0.1 to −1.0 V vs. saturated calomel electrode. For that reason, they are pinpointed as potential negative electrodes for electrochemical double-layer supercapacitors and hybrid or asymmetric supercapacitors.

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Section: Introductionmentioning

confidence: 99%

RETRACTED: Activated Carbons From Winemaking Biowastes for Electrochemical Double-Layer Capacitors

et al. 2020

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“…Among numerous energy storage devices, supercapacitors are regarded as the promising energy storage devices for their fast charge–discharge rate, high reversibility, and long cycle lifetime. − As a kind of supercapacitors, nano-sized carbon fiber (CF) supercapacitors show tremendous potential owing to their controllable morphologies, large specific surface area, excellent thermal stability, and electrical conductivity. − Polyacrylonitrile (PAN), as the most common precursor material of fossil resources for nano-sized CF supercapacitors, exhibits excellent spinnability and high carbon yield in electrospinning to prepare electrodes. − However, relying heavily on the expensive and nonrenewable fossil resources seriously threatens the sustainable development of nano-sized CF supercapacitors. , Therefore, the development and utilization of green, clean, and biorenewable precursor materials is an optimal strategy for the further development and wide application of CF supercapacitors …”

Section: Introductionmentioning

confidence: 99%

Electrospun Lignin-Based Carbon Nanofibers as Supercapacitor Electrodes

Zhu

Liu

Cao

et al. 2020

ACS Sustainable Chem. Eng.

100

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Lignin shows great potential for carbon-based functional materials and composite material electronics. However, high heterogeneity, poor thermal stability, and low molecular weight limit the practical application of lignin for fiber-shaped lignin-based materials, especially in the field of supercapacitors with high energy storage devices. Herein, a simple modification and fractionation strategy is designed to obtain lignin for the preparation of high-performance lignin-based carbon fibers (CFs). The modification and fractionation process effectively increases the molecular weight and reduces the heterogeneity of lignin. The introduction of lignin with large molecular weight and low heterogeneity is conducive to reduce the carbon weight loss of the precursor fibers, maintain the morphology of lignin-based CFs, and then significantly improve the specific surface area and energy storage properties. The specific surface area and energy storage density of the obtained lignin-based CFs reach 2042.86 m2/g and 442.2 F/g, respectively. This strategy provides a simple and effective method for the preparation of high-performance, low-cost, and green energy storage materials.

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“…It delivered a high specific capacitance of 520.3 F g −1 at 1 A g −1 in 1 M H 2 SO 4 electrolyte and moderate stability up to 500 cycles. Likewise, the hybrids of conducting polymers with various nanocarbon forms have recently been investigated to boost the electrochemical performance of the ESCs, including graphene oxide, [267][268][269] graphene/SWCNT, 270 rGO, 263,271 activated carbon, [272][273][274] CNTs. [46][47][48][275][276][277][278][279]…”

Section: Nanocarbons/α-fe 2 O 3 Composite-based Escsmentioning

confidence: 99%

Progress on carbon for electrochemical capacitors

Bizuneh

Adam

2023

Battery Energy

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Electrochemical capacitors bridge the energy gap between conventional dielectric capacitors and batteries. The energy storage mechanism relies on purely physical electrical double‐layer charging (EDL) and the faradaic process involving fast electrochemical redox reactions. These processes are strongly influenced by the surface area, porosity, electrical conductivity of the electrode materials, and the operating potential window of the electrolyte used. Carbonaceous materials play enormous roles in delivering outstanding electrochemical performance in electrochemical supercapacitors (ESCs) due to attractive material features suitable for high charge storage and release. However, due to the purely EDL‐based charge storage mechanism in only carbon‐based ESCs, the achievable energy density is low and hardly meets the high energy density demanding applications. Therefore, various carbon structures such as activated carbon, carbon nanotubes, graphene, and so on are designed and integrated with other hetero atoms or combined with transition metal oxides and polymer components to induce the pseudo‐capacitive contributions via the electrochemical faradaic reaction. Thus, promoting the electrochemical performance of ESC based on the hybrid/composite material attributed to synergistic capacitances from EDLC and pseudocapacitance. Therefore, this review overviews the general perspective of the ESCs based on nanocarbons with various forms trending the progressive research contributions in developing high‐performance ESCs.

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Activated Carbon for Supercapacitors

Cited by 7 publications

References 70 publications

RETRACTED: Activated Carbons From Winemaking Biowastes for Electrochemical Double-Layer Capacitors

RETRACTED: Activated Carbons From Winemaking Biowastes for Electrochemical Double-Layer Capacitors

Electrospun Lignin-Based Carbon Nanofibers as Supercapacitor Electrodes

Progress on carbon for electrochemical capacitors

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