A water-dielectric capacitor using hydrated graphene oxide film

Wang, Da-Wei, Du, Aijun, Taran, Elena, Lu, Gao Qing (Max) and Gentle, Ian R. (2012) A water-dielectric capacitor using hydrated graphene oxide film. Journal of Materials Chemistry, 22 39: 21085-21091. doi:10.1039/c2jm34476a

Author Wang, Da-Wei
Du, Aijun
Taran, Elena
Lu, Gao Qing (Max)
Gentle, Ian R.
Title A water-dielectric capacitor using hydrated graphene oxide film
Journal name Journal of Materials Chemistry   Check publisher's open access policy
ISSN 0959-9428
Publication date 2012-10-21
Sub-type Article (original research)
DOI 10.1039/c2jm34476a
Open Access Status Not Open Access
Volume 22
Issue 39
Start page 21085
End page 21091
Total pages 7
Place of publication Cambridge, United Kingdom
Publisher Royal Society of Chemistry
Language eng
Formatted 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.
Keyword Graphite oxide
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

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