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Issue 15, 2016
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Silica-assisted bottom-up synthesis of graphene-like high surface area carbon for highly efficient ultracapacitor and Li-ion hybrid capacitor applications

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Abstract

We report a facile bottom-up approach for the synthesis of pure and macro-sized (>500 nm) graphene-like carbon by precisely employing sp2 carbon rich 1,2,4,5-benzene tetracarboxylic acid (BTCA) as a precursor. We also addressed the features, such as high specific surface area (SSA) and sp2 hybridized carbon content, of the BTCA-derived carbon (BTCADC) over conventional top-down processed reduced graphene oxide (RGO). For instance, a two fold enhancement in SSA (960 m2 g−1) and C : O atomic ratio (∼19) was noted for BTCADC when compared to RGO (SSA: 402 m2 g−1 and C : O ratio ∼ 10). The SSA of BTCADC was further extended to 2673 m2 g−1via a chemical activation process (A-BTCADC) along with a high pore volume (2.15 cm3 g−1). Furthermore, we attempted to explain the unsolved issue of carbon layer stacking (π–π stacking) in RGO by precisely adopting a bottom-up approach. From an application point of view, we explored the possibility of using such carbonaceous materials as promising electrodes for both symmetric and Li-ion hybrid supercapacitor configurations in an organic medium. The A-BTCADC based symmetric cell in a 1 M tetraethylammonium tetrafluoroborate (TEA·BF4) in acetonitrile (ACN) electrolyte displayed a specific capacitance (Csp) of 225 F g−1 (at 0.5 A g−1) with a stable cycling profile of up to 10 000 cycles (at 10 A g−1) between 0 and 3 V. This bottom-up approach opens new avenues to extend graphene-based science and technology to the next level.

Graphical abstract: Silica-assisted bottom-up synthesis of graphene-like high surface area carbon for highly efficient ultracapacitor and Li-ion hybrid capacitor applications

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Publication details

The article was received on 28 Jan 2016, accepted on 07 Mar 2016 and first published on 08 Mar 2016


Article type: Paper
DOI: 10.1039/C6TA00868B
Citation: J. Mater. Chem. A, 2016,4, 5578-5591
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    Silica-assisted bottom-up synthesis of graphene-like high surface area carbon for highly efficient ultracapacitor and Li-ion hybrid capacitor applications

    D. Mhamane, V. Aravindan, M. Kim, H. Kim, K. C. Roh, D. Ruan, S. H. Lee, M. Srinivasan and K. Kim, J. Mater. Chem. A, 2016, 4, 5578
    DOI: 10.1039/C6TA00868B

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