Activated carbon from wasp hive for aqueous electrolyte supercapacitor application

Lobato-Peralta, Diego Ramón; Amaro, Rayko; Arias, Dulce M.; Cuentas-Gallegos, Ana Karina; Jaramillo-Quintero, Oscar A.; Sebastián, P.J.; Okoye, Patrick U.

doi:10.1016/j.jelechem.2021.115777

Cited by 24 publications

(6 citation statements)

References 80 publications

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“…The supercapacitor showed superior stability, maintaining 98.4 ± 0.3% capacity after a prolonged cycle life. This performance surpasses studies reported in the literature using biomass-derived AC supercapacitors. − For instance, Liu et al reported the electrochemical stability of biomass-derived activated carbon in 6 M KOH with a 96% capacity retention at 10 A g –1 for 10,000 cycles . Wu et al reported a cycle stability of 85.2% at 10 A g –1 in 6 M KOH for 5,000 cycles .…”

Section: Resultsmentioning

confidence: 99%

Sustainable Green Route for Activated Carbon Synthesis from Biomass Waste for High-Performance Supercapacitors

Jafari,

Botte

2024

ACS Omega

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Supercapacitors are high-power energy storage devices due to their charge storage capability and long cyclic stability. These devices rely on highly porous materials for electrodes providing a substantial surface area per mass, such as highly porous carbon. Developing high-performance porous carbon from biomass wastes such as waste-activated sludge and spent coffee is a sustainable way to reduce adverse environmental effects, contributing toward a carbon circular economy. In this study, hierarchically porous carbon with a high surface area of 1198 ± 60 m 2 g −1 was synthesized through a green route. Sodium acetate was utilized as an environmentally friendly electrolyte. The long-term stability test at a high current density was conducted, providing valuable insights into the viability of sodium acetate as a robust electrolyte in supercapacitor application. The supercapacitor demonstrated an excellent cycle stability of 98.4% after 20,000 cycles at a current density of 10 A g −1 in sodium acetate. Further assessment revealed dominant fast surface kinetics. Moreover, a maximum energy density of 15.9 Wh kg −1 at 0.2 A g −1 was achieved. By utilizing highly porous carbon in conjunction with a water-based binder, a substantial improvement of 76% in capacity with respect to a nonaqueous-based binder was demonstrated.

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Section: Resultsmentioning

confidence: 99%

Sustainable Green Route for Activated Carbon Synthesis from Biomass Waste for High-Performance Supercapacitors

Jafari,

Botte

2024

ACS Omega

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“…They can provide high ion concentration and ionic conductivity, low resistance, environmental benignity, and are inexpensive and easy to post-treat. As a result, aqueous electrolyte EDLCs have also attracted researchers' attention [50][51][52][53][54][55][56][57][58]. However, the development of aqueous EDLCs is significantly hindered by their relatively low energy densities, which are caused by a narrow voltage window.…”

Section: J Stat Mech (2024) 053205mentioning

confidence: 99%

Electrode wettability and capacitance of electrical double layer capacitor: a classical density functional theory study

Tian,

Zhou

2024

J. Stat. Mech.

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We suggest a coarse-grained water model for use in classical density functional theory (cDFT) to describe aqueous inorganic salt solutions that act as working electrolytes in electrical double-layer capacitors (EDLCs) with electrodes comprising two face-to-face doped carbon monolayers. Focus of the cDFT calculations lies on the influence of solvent electrode wettability (SEW) on capacitance and energy storage behaviors, while also considering its interaction with factors like electrolyte bulk concentration, pore size, electrode voltage, and temperature. New phenomena are disclosed theoretically. Remarkably, this study challenges the traditional notion that energy storage is consistently boosted by enhancing the electrode’s ionophobicity. Contrarily, the SEW effect reduces energy storage below the standard aqueous electrochemical window voltage (around 1.2 V) and only enhances the energy storage as the voltage surpasses a certain threshold up to the optimal window voltage (2 V–2.5 V). Furthermore, a non-monotonic SEW effect on energy storage is demonstrated under appropriate conditions, shedding new light on the complex relationship between ionophobicity and energy storage. Moreover, the present coarse-grained water model enables the prediction of the experimentally observed inverse relationship between temperature and capacitance. In contrast, the widely used electrolyte primitive model predicts the existence of a maximum value. The decisive factor for the impact of SEW on capacitance and energy storage is identified as congestion within the electrode pore, while other factors contribute by affecting this congestion. The present research offers valuable insights, highlighting the significance of SEW in the innovative and strategic design of aqueous inorganic EDLC devices.

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“…40, No. 10) generated from various fields to prepare carbon materials [29][30][31][32][33][34][35][36][37][38][39].…”

Section: Introductionmentioning

confidence: 99%

Activated carbons derived from polyethylene terephthalate for coin-cell supercapacitor electrodes

Jung

Yang

Choi

et al. 2023

Korean J. Chem. Eng.

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We successfully prepared activated carbon derived from polyethylene terephthalate (PET) via carbonization and subsequent activation under various conditions and applied it as active material for supercapacitors. In the activation, we used CO 2 for physical activation or KOH for chemical activation and varied the activation temperature from 600 °C to 1,000 °C. We found that CO 2 activation is unsuitable because of insufficient pore formation or low activation yield. Interestingly, PET-derived activated carbon obtained using KOH (PETK) at 700 °C–900 °C exhibited higher specific surface areas than YP50f, which is a commercial activated carbon. Furthermore, some PETKs even displayed a dramatic increase in crystallinity. In particular, the PET-derived activated carbon prepared at 900 °C with KOH (PETK900) had the highest retention rate at a high charge-discharge rate and better durability after 2500 cycles than YP50f. Furthermore, employing the same process that we used with the PET chips, we successfully converted waste PET bottles into activated carbon materials. Waste PET-derived activated carbons exhibited good electrochemical performance as active material for supercapacitors. We thus found chemical activation with KOH to be an appropriate method for manufacturing PET-derived activated carbon and PETKs derived both from PET chips and waste PET have considerable potential for commercial use as active materials for supercapacitors. Electronic Supplementary Material Supplementary material is available for this article at 10.1007/s11814-023-1466-3 and is accessible for authorized users.

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Activated carbon from wasp hive for aqueous electrolyte supercapacitor application

Cited by 24 publications

References 80 publications

Sustainable Green Route for Activated Carbon Synthesis from Biomass Waste for High-Performance Supercapacitors

Sustainable Green Route for Activated Carbon Synthesis from Biomass Waste for High-Performance Supercapacitors

Electrode wettability and capacitance of electrical double layer capacitor: a classical density functional theory study

Activated carbons derived from polyethylene terephthalate for coin-cell supercapacitor electrodes

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