Jump to main content
Jump to site search

Issue 39, 2012
Previous Article Next Article

A water-dielectric capacitor using hydrated graphene oxide film

Author affiliations

Abstract

Despite the widespread use of paper, plastic or ceramics in dielectric capacitors, water has not been commonly used as a dielectric due to its tendency to become conductive as it easily leaches ions from the environment. We show here that when water is confined between graphene oxide sheets, it can retain its insulating nature and behave as a dielectric. A hydrated graphene oxide film was used as a dielectric spacer to construct a prototype water-dielectric capacitor. The capacitance depends on the water content of the hydrated GO film as well as the voltage applied to the device. Our results show that the capacitance per unit area of the GO film is in the range of 100–800 μF cm−2, which is 5–40 times that of the double layer capacitance per surface area of activated carbon.

Graphical abstract: A water-dielectric capacitor using hydrated graphene oxide film

Back to tab navigation

Publication details

The article was received on 09 Jul 2012, accepted on 24 Aug 2012 and first published on 05 Sep 2012


Article type: Paper
DOI: 10.1039/C2JM34476A
Citation: J. Mater. Chem., 2012,22, 21085-21091
  •   Request permissions

    A water-dielectric capacitor using hydrated graphene oxide film

    D. Wang, A. Du, E. Taran, G. Q. (. Lu and I. R. Gentle, J. Mater. Chem., 2012, 22, 21085
    DOI: 10.1039/C2JM34476A

Search articles by author

Spotlight

Advertisements