Two-Dimensional Polymer Synthesized via Solid-State Polymerization for High-Performance Supercapacitors

Wei Liu, Mani Ulaganathan, Ibrahim Abdelwahab, Xin Luo, Zhongxin Chen, Sherman Jun Rong Tan, Xiaowei Wang, Yanpeng Liu, Dechao Geng, Yang Bao, Jianyi Chen, Kian Ping Loh

Research output: Journal article publicationJournal articleAcademic researchpeer-review

50 Citations (Scopus)

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-1at a current density of 1.0 A g-1, and shows outstanding cycle performance.
Original languageEnglish
Pages (from-to)852-860
Number of pages9
JournalACS Nano
Volume12
Issue number1
DOIs
Publication statusPublished - 23 Jan 2018

Keywords

  • 2-D materials
  • C-C coupling
  • conjugated porous polymers
  • solid-state polymerization
  • supercapacitors

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)
  • Physics and Astronomy(all)

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