Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/77765
Title: Two-dimensional polymer synthesized via solid-state polymerization for high-performance supercapacitors
Authors: Liu, W
Ulaganathan, M
Abdelwahab, I
Luo, X 
Chen, Z
Rong, Tan, SJ
Wang, X
Liu, Y
Geng, D
Bao, Y
Chen, J
Loh, KP
Issue Date: 2018
Publisher: American Chemical Society
Source: ACS nano, 2018, v. 12, no. 1, p. 852-860 How to cite?
Journal: ACS nano 
Abstract: Two-dimensional (2-D) polymer has properties that are attractive for energy storage applications because of its combination of heteroatoms, porosities and layered structure, which provides redox chemistry and ion diffusion routes through the 2-D planes and 1-D channels. Here, conjugated aromatic polymers (CAPs) were synthesized in quantitative yield via solid-state polymerization of phenazine-based precursor crystals. By choosing flat molecules (2-TBTBP and 3-TBQP) with different positions of bromine substituents on a phenazine-derived scaffold, C-C cross coupling was induced following thermal debromination. CAP-2 is polymerized from monomers that have been prepacked into layered structure (3-TBQP). It can be mechanically exfoliated into micrometer-sized ultrathin sheets that show sharp Raman peaks which reflect conformational ordering. CAP-2 has a dominant pore size of ∼0.8 nm; when applied as an asymmetric supercapacitor, it delivers a specific capacitance of 233 F g-1 at a current density of 1.0 A g-1, and shows outstanding cycle performance.
URI: http://hdl.handle.net/10397/77765
ISSN: 1936-0851
EISSN: 1936-086X
DOI: 10.1021/acsnano.7b08354
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