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Corn Husk Derived Activated Carbon/Siloxene Composite Electrodes based Symmetric Supercapacitor with High Energy Density and Wide Temperature Tolerance

Lookup NU author(s): Professor Lidija Siller

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

In the present work, novel composite material comprising of corn husk derived activated carbon and siloxene nanosheets have been explored as new class of multicomponent electrode material for fabricating high energy density supercapacitors with wide temperature tolerance. The activated carbon obtained from corn husk (ACH−900) with high surface area and pore volume acts as an ideal framework for hosting siloxene nanosheets (S) that allows the overall siloxene−corn husk derived activated carbon (ACH−900/S) composite to deliver excellent electrochemical performance. The as-prepared ACH−900/S composite electrode exhibited a high specific capacitance of 415 F g⁻¹ at 0.25 A g⁻¹ and retained 73.4% of its initial capacitance even at a high current density of 30 A g⁻¹ in 1 M Na₂SO₄ electrolyte. In addition, the symmetric supercapacitor assembled with “acetonitrile/water-in-salt (AWIS)” electrolyte exhibited an energy density of 57.2 W h kg⁻¹ at 338 W kg⁻¹ with a cyclic stability of 92.8% after 10000 cycles at 5 A g⁻¹ current density. Besides, the fabricated ACH−900/S supercapacitor can operate over wide temperature range from 0 to 100 °C. This work opens up new frontiers to develop low-cost safe supercapacitors with wide temperature tolerance and excellent electrochemical performance.

Publication metadata

Author(s): Reddygunta KKR, Siller L, Ivanturi A

Publication type: Article

Publication status: Published

Journal: ChemElectroChem

Year: 2024

Volume: 11

Issue: 19

Print publication date: 01/10/2024

Online publication date: 10/09/2024

Acceptance date: 20/05/2024

Date deposited: 25/10/2024

ISSN (electronic): 2196-0216

Publisher: Wiley-VCH Verlag GmbH & Co. KGaA

URL: https://doi.org/10.1002/celc.202400230

DOI: 10.1002/celc.202400230

Data Access Statement: The data that support the findings of this study are available from the corresponding author upon reasonable request.

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