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Porosity-Engineered CNT-MoS2 Hybrid Nanostructures for Bipolar Supercapacitor Applications
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2023 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 15, no 29, p. 34818-34828Article in journal (Refereed) Published
Abstract [en]

Bipolar supercapacitors that can store many fold higher capacitance in negative voltage compared to positive voltage are of great importance if they can be engineered for practical applications. The electrode material encompassing high surface area, better electrochemical stability, high conductivity, moderate distribution of pore size, and their interaction with suitable electrolytes is imperative to enable bipolar supercapacitor performance. Apropos of the aforementioned aspects, the intent of this work is to ascertain the effect of ionic properties of different electrolytes on the electrochemical properties and performance of a porous CNT-MoS2 hybrid microstructure toward bipolar supercapacitor applications. The electrochemical assessment reveals that the CNT-MoS2 hybrid electrode exhibited a two- to threefold higher areal capacitance value of 122.3 mF cm-2 at 100 μA cm-2 in 1 M aqueous Na2SO4 and 42.13 mF cm-2 at 0.30 mA cm-2 in PVA-Na2SO4 gel electrolyte in the negative potential window in comparison to the positive potential window. The CNT-MoS2 hybrid demonstrates a splendid Coulombic efficiency of ∼102.5% and outstanding stability with capacitance retention showing a change from 100% to ∼180% over 7000 repeated charging-discharging cycles. © 2023 American Chemical Society.

Place, publisher, year, edition, pages
American Chemical Society , 2023. Vol. 15, no 29, p. 34818-34828
Keywords [en]
bipolar supercapacitor, CNT-MoS2 hybrid, electrolyte, ionic concentration, ionic size, porous, potential window, Capacitance, Electrochemical electrodes, Layered semiconductors, Molybdenum compounds, Pore size, Sodium sulfate, Solid electrolytes, Sulfur compounds, CNT-MoS2 hybrid, Hybrid nanostructures, Ionic concentrations, Ionic sizes, Negative voltage, Positive voltage, Potential windows, Supercapacitor application, Supercapacitor
National Category
Materials Chemistry
Identifiers
URN: urn:nbn:se:du-46644DOI: 10.1021/acsami.3c05098ISI: 001027022400001Scopus ID: 2-s2.0-85165905527OAI: oai:DiVA.org:du-46644DiVA, id: diva2:1786039
Available from: 2023-08-07 Created: 2023-08-07 Last updated: 2023-08-07Bibliographically approved

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