Pyrene-Functionalized PTMA by NRC for Greater π−π Stacking with rGO and Enhanced Electrochemical Properties

Kai Zhang, Yuxiang Hu, Lianzhou Wang, Michael J. Monteiro, Zhongfan Jia

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Nitroxide radical polymers can undergo both excellent electrochemical redox reactions and a rapid "click" coupling reaction with carbon-centered radicals (i.e., nitroxide radical coupling (NRC) reaction). In this work, we report a strategy to functionalize poly(2,2,6,6,-Tetramethylpiperidinyl-1-oxyl methacrylate) (PTMA) with pyrene side groups through a rapid and near quantitative NRC reaction. This resulted in P(TMA-co-PyMA) random copolymers with near quantitative amounts of pyrene along the PTMA chain for greater π−π interaction with rGO, while the nitroxide radicals on the polymer could simultaneously be used for energy storage. These copolymers can bind with reduced graphene oxide (rGO) and form layered composites through noncovalent π−π stacking, attaining molecular-level dispersion. Electrochemical performance of the composites with different polymer contents (24, 35, and 45 wt %), tested in lithium ion batteries, indicated that the layered structures consisting of P(TMA-co-PyMA) maintained greater capacities at high C-rates. This simple and efficient strategy to synthesize pyrene-functionalized polymers will provide new opportunities to fabricate many other polymer composite electrodes for desired electrochemical performance.

Original languageEnglish
Pages (from-to)34900-34908
Number of pages9
JournalACS Applied Materials and Interfaces
Volume9
Issue number40
DOIs
Publication statusPublished - 28 Sep 2017
Externally publishedYes

Keywords

  • electrochemistry
  • π-π stacking
  • nitroxide radical coupling
  • nitroxide radical polymer
  • reduced graphene oxide

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