Electrochemically Exfoliated Graphene for Electrode Films: Effect of Graphene Flake Thickness on the Sheet Resistance and Capacitive Properties

Jinzhang Liu; Marco Notarianni; Geoffrey Will; Vincent Tiing Tiong; Hongxia Wang; Nunzio Motta

doi:10.1021/la403159n

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Electrochemically Exfoliated Graphene for Electrode Films: Effect of Graphene Flake Thickness on the Sheet Resistance and Capacitive Properties

Journal article

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Electrochemically Exfoliated Graphene for Electrode Films: Effect of Graphene Flake Thickness on the Sheet Resistance and Capacitive Properties

Jinzhang Liu, Marco Notarianni, Geoffrey Will, Vincent Tiing Tiong, Hongxia Wang and Nunzio Motta

Langmuir, Vol.29(43), pp.13307-13314

2013

DOI: https://doi.org/10.1021/la403159n

PMID: 24089707

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Abstract

capacitors

electrical properties

electrodes

thickness

two dimensional materials

We present an electrochemical exfoliation method to produce controlled thickness graphene flakes by ultrasound assistance. Bilayer graphene flakes are dominant in the final product by using sonication during the electrochemical exfoliation process, while without sonication the product contains a larger percentage of four-layer graphene flakes. Graphene sheets prepared by using the two procedures are processed into films to measure their respective sheet resistance and optical transmittance. Solid-state electrolyte supercapacitors are made using the two types of graphene films. Our study reveals that films with a higher content of multilayer graphene flakes are more conductive, and their resistance is more easily reduced by thermal annealing, making them suitable as transparent conducting films. The film with higher content of bilayer graphene flakes shows instead higher capacitance when used as electrode in a supercapacitor.

Details

Title: Electrochemically Exfoliated Graphene for Electrode Films: Effect of Graphene Flake Thickness on the Sheet Resistance and Capacitive Properties
Authors: Jinzhang Liu (Corresponding Author) - Queensland University of Technology
Marco Notarianni (Author) - Queensland University of Technology
Geoffrey Will (Author) - Queensland University of Technology
Vincent Tiing Tiong (Author) - Queensland University of Technology
Hongxia Wang (Author) - Queensland University of Technology
Nunzio Motta (Author) - Queensland University of Technology
Publication details: Langmuir, Vol.29(43), pp.13307-13314
Publisher: American Chemical Society
Date published: 2013
DOI: 10.1021/la403159n
ISSN: 1520-5827; 0743-7463
PMID: 24089707
Organisation Unit: School of Science, Technology and Engineering
Language: English
Record Identifier: 99737992502621
Output Type: Journal article

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Web Of Science research areas: Chemistry, Multidisciplinary; Chemistry, Physical; Materials Science, Multidisciplinary