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Issue 40, 2019
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Development of a novel SBA-15 templated mesoporous reduced graphitic oxide composite for high performance supercapacitors and fabrication of its device by an electrospinning technique

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Abstract

A novel synthetic route is formulated for the development of mesoporous reduced graphitic oxide (RGO)–silica composites by wrapping SBA-15 between the graphene oxide (GO) layers followed by a chemical reduction process. To prepare the Santa Barbara Amorphous (SBA-15) grafted graphene oxide, amino groups are grafted onto SBA-15, fabricated through a sol–gel technique using Pluronic P-123 as a template, tetraethyl orthosilicate as a silica source and pre-prepared graphene oxide as an additive. The formation of a mesoporous channel with an average pore diameter of 3.14 nm and a high specific surface area of ∼10.58 m2 g−1 was confirmed by N2 adsorption–desorption. Raman spectroscopy data displayed an increase in the ID/IG ratio of GO upon reduction indicating the creation of structural defects. Further, scanning electron microscopic analysis revealed the formation of a regular and ordered rod-like structure and transmission electron microscopic analysis confirmed the wrapping of the SBA-15 channel between GO layers. The conductance of the composites is measured by the four probe method. The three-electrode cell in an aqueous electrolyte shows a high specific capacitance of 533.3 F g−1 with a high capacitance retention of 91% even after 2500 cycles. The composite delivers an energy and power density of 74.06 W h kg−1 and 8.33 kW kg−1, respectively, and these properties are much superior to those of graphene based supercapacitors reported in the literature. The fabricated supercapacitor device using the fibres developed by an electrospinning technique showed a high specific capacitance of 165.2 F g−1, with a high energy density of 22.94 W h kg−1. These electrochemical performances clearly indicate that mesoporous reduced graphene oxide could be used as a promising electrode material in supercapacitors for electrochemical energy storage.

Graphical abstract: Development of a novel SBA-15 templated mesoporous reduced graphitic oxide composite for high performance supercapacitors and fabrication of its device by an electrospinning technique

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Publication details

The article was received on 06 Jun 2019, accepted on 13 Sep 2019 and first published on 17 Sep 2019


Article type: Paper
DOI: 10.1039/C9NJ02958C
New J. Chem., 2019,43, 16017-16032

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    Development of a novel SBA-15 templated mesoporous reduced graphitic oxide composite for high performance supercapacitors and fabrication of its device by an electrospinning technique

    S. R. Naik, A. I. Torvi, D. D. Achari and M. Y. Kariduraganavar, New J. Chem., 2019, 43, 16017
    DOI: 10.1039/C9NJ02958C

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