Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 7, Issue 7, Pages 3066-3071Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8ta10554e
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Funding
- National Natural Science Foundation of China [21771155, 21721001, 21875141]
- Ministry of Science and Technology of China [2017YFA0204902]
- Shanghai Pujiang Program [18PJ1409000]
- Opening Project of State Key Laboratory of Advanced Chemical Power Sources [SKL-ACPS-C-23]
- Fundamental Research Funds for the Central Universities [20720180035]
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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 degrees A and laminar structure with an interlayer spacing of 3.8 degrees A, 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 sp(2) moieties and the in-plane nanopores of TP-COP.
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