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Two-dimensional extended π-conjugated triphenylene-core covalent organic polymer

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Abstract

Carbon-rich two-dimensional (2D) materials show significant potential in energy storage and conversion applications. A conjugated 2D covalent organic polymer (COP) with embedded triphenylene (TP) units was synthesized by Glaser–Hay cross-coupling and validated by Raman, IR, XPS and NMR spectroscopy. TP-COP exhibited a uniform pore size of 5.4 Å and laminar structure with an interlayer spacing of 3.8 Å, which could be mechanically exfoliated to yield few-layered nanosheets. Interfacial polymerization produced the continuous TP-COP films from quasi-monolayer to multilayer. As the anode materials of lithium batteries, TP-COP delivered large reversible capacity up to 1624 mA h g−1, high charge rate, and good recycling ability. These properties are likely due to the presence of lithium ions in both the interspace of the expanded sp2 moieties and the in-plane nanopores of TP-COP.

Graphical abstract: Two-dimensional extended π-conjugated triphenylene-core covalent organic polymer

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Publication details

The article was received on 02 Nov 2018, accepted on 18 Dec 2018 and first published on 19 Dec 2018


Article type: Paper
DOI: 10.1039/C8TA10554E
Citation: J. Mater. Chem. A, 2019, Advance Article
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    Two-dimensional extended π-conjugated triphenylene-core covalent organic polymer

    X. Ye, Y. Huang, X. Tang, J. Xu, C. Peng and Y. Tan, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C8TA10554E

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