Bottom-up wet-chemical synthesis of a two-dimensional porous carbon material with high supercapacitance using a cascade coupling/cyclization route

Yongjie Xu, Reiner Sebastian Sprick, Nick J. Brownbill, Frédéric Blanc, Qingyin Li, John W. Ward, Shijie Ren, Andrew I. Cooper

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)
2 Downloads (Pure)

Abstract

Wet-chemical bottom-up synthesis methods for two-dimensional (2D) layered materials are less explored than the top-down exfoliation of bulk materials. Here, we set out to synthesize a graphyne-type material by a wet-chemical synthesis method using Sonogashira-Hagihara cross-coupling polycondensation of a multifunctional monomer,2, bearing alkyne and vinyl bromide functionalities. Spectroscopic and chemical analysis revealed that upon C-C bond formation, an unanticipated Bergman cyclization occurred to give an aromatic 2D porous carbon material (2D-PCM).2D-PCMis a black material with graphene-like layers and a bulk structure that is similar to irregular graphite. It is porous with a hierarchical pore structure and an apparent Brunauer-Emmett-Teller surface area of 575 m2g−1. The material has excellent electrochemical performance as an electrode in supercapacitors with a specific capacitance of 378 F g−1at the current density of 0.1 A g−1, which surpasses state-of-the-art carbon materials, suggesting that wet-chemical methods might give functional benefits over top-down processing routes.

Original languageEnglish
Pages (from-to)3303-3308
Number of pages6
JournalJournal of Materials Chemistry A
Volume9
Issue number6
Early online date8 Feb 2021
DOIs
Publication statusPublished - 14 Feb 2021

Keywords

  • wet-chemical synthesis
  • Sonogashira–Hagihara cross-coupling
  • Bergman cyclization
  • 2D porous carbon material

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