Graphene Quantum Dots for Energy Storage

  • Author: Charlotte Koschnick
  • Published: 08 August 2017
  • Copyright: Wiley-VCH Verlag GmbH & Co. KGaA
  • Source / Publisher: Chemistry of Materials/ACS Publications
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: Graphene Quantum Dots for Energy Storage

Graphene quantum dots (GQDs) are small graphene sheets (<100 nm) with a higher solubility relative to traditional graphene. This allows for simple chemical functionalization using traditional organic synthetic techniques. Thus far, novel functionalized GQDs have been used in materials such as organic photovoltaics and light emitting sources. However, GQDs have not seen much use in energy storage applications.

Dwight S. Seferos, University of Toronto, Canada, and colleagues have developed GQD/polymer films with properties well suited for energy storage and catalysis. Here, the outer edge of the GQDs was functionalized with 3,4-ethylenedioxythiophene (EDOT). The GQD/EDOT monomer units were subsequently electropolymerized on an Au coated Si wafer to form conjugated polymer films. The team investigated galvanostatic charge/discharge curves to calculate the capacitance, the materials ability to store electric charge, of both PEDOT (polyethylenedioxythiophene) and GQD/PEDOT films.

The capacitance of GQD/PEDOT films was found to be 152.8 F/cm3 at 1.84 A/cm3 while the capacitance of the GQD/PEDOT films had a capacitance of 120.1 F/cm3 at similar current intensities. An increase of capacitance of ca. 30 % upon incorporation of GQDs into the conducting polymer shows the promise of GQD/polymer films as materials for energy storage applications.


Article Views: 1898

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

Bookmark and Share

If you would like to reuse any content, in print or online, from, please contact us first for permission. more

CONNECT: on Facebook on Twitter on YouTube on LinkedIn Sign up for our free newsletter

A product of ChemPubSoc Europe (16 European Chemical Societies)and Wiley-VCH