期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 9, 期 6, 页码 3303-3308出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ta11649a
关键词
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资金
- National Natural Science Foundation of China [51973128, 21574087]
- Science and Technology Department of Sichuan Province [2019YJ0128]
- Leverhulme Trust via the Leverhulme Research Centre for Functional Materials Design
- Engineering and Physical Sciences Research Council (EPSRC) [EP/N004884/1]
- EPSRC [EP/N004884/1] Funding Source: UKRI
In this study, a new 2D porous carbon material 2D-PCM was successfully synthesized using a wet-chemical synthesis method, showing excellent electrochemical performance that surpasses state-of-the-art carbon materials. Comparison with top-down processing routes suggests that wet-chemical methods may have certain advantages in the synthesis of 2D materials.
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-PCM is 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 m(2) g(-1). The material has excellent electrochemical performance as an electrode in supercapacitors with a specific capacitance of 378 F g(-1) at 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.
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