Jump to main content
Jump to site search

Issue 23, 2011
Previous Article Next Article

High-performance supercapacitor electrodes based on graphene hydrogels modified with 2-aminoanthraquinone moieties

Author affiliations

Abstract

2-Aminoanthraquinone (AAQ) molecules were covalently grafted onto chemically modified graphene (CMG), and the AAQ functionalized CMG sheets were self-assembled into macroporous hydrogels for supercapacitor electrodes. The electrode based on the AAQ modified self-assembled graphene hydrogel (AQSGH) showed a high specific capacitance of 258 F g−1 at a discharge current density of 0.3 A g−1, which is much larger than that of a pure graphene hydrogel (193 F g−1). Furthermore, the AQSGH electrode exhibited excellent rate capability and a long cycle life. This is mainly due to the covalently bonded AAQ moieties contributing additional redox capacitance. Furthermore, the highly conductive graphene hydrogel scaffold provided a large specific surface area for forming electric double layers and convenient routes for charge transfer and electrolyte diffusion.

Graphical abstract: High-performance supercapacitor electrodes based on graphene hydrogels modified with 2-aminoanthraquinone moieties

Back to tab navigation

Supplementary files

Publication details

The article was received on 30 Mar 2011, accepted on 12 Apr 2011 and first published on 11 May 2011


Article type: Paper
DOI: 10.1039/C1CP20980A
Citation: Phys. Chem. Chem. Phys., 2011,13, 11193-11198

  •   Request permissions

    High-performance supercapacitor electrodes based on graphene hydrogels modified with 2-aminoanthraquinone moieties

    Q. Wu, Y. Sun, H. Bai and G. Shi, Phys. Chem. Chem. Phys., 2011, 13, 11193
    DOI: 10.1039/C1CP20980A

Search articles by author

Spotlight

Advertisements