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.
Bibliographical notePublisher Copyright:
© The Royal Society of Chemistry 2016.
All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Materials Science(all)