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

Dattakumar Mhamane, Vanchiappan Aravindan, Myeong Seong Kim, Hyun Kyung Kim, Kwang Chul Roh, Dianbo Ruan, Sang Hyun Lee, Madhavi Srinivasan, Kwang Bum Kim

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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 10000 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.

Original languageEnglish
Pages (from-to)5578-5591
Number of pages14
JournalJournal of Materials Chemistry A
Volume4
Issue number15
DOIs
Publication statusPublished - 2016 Apr 21

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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