Compact, flexible conducting polymer/graphene nanocomposites for supercapacitors of high volumetric energy density
Date
2018
Authors
Moussa, M.
El-Kady, M.F.
Abdel-Azeim, S.
Kaner, R.B.
Majewski, P.
Ma, J.
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Composites Science and Technology, 2018; 160:50-59
Statement of Responsibility
Mahmoud Moussa, Maher F. El-Kady, Safwat Abdel-Azeim, Richard B. Kaner, Peter Majewski, Jun Ma
Conference Name
Abstract
Graphene is extensively utilized in energy storage devices because of its high surface area and electronic conductivity as well as ease of electrode fabrication. But graphene sheets often stack themselves in polymeric matrices leading to poor capacitive performance. This problem was addressed herein by developing and inserting respectively two types of nano-sized conducting polymers into graphene interlayer spacing. The resulting hydrogel composite electrodes demonstrated efficient electron transfer for fast and reversible Faradaic reactions at the interface. Theoretical modelling by the density functional theory suggested that the reduction involve 2Hþ transfer steps from polyaniline to graphene oxide: the first step would be an epoxy-ring opening process after activation of the CeO bond, and the second step would be CeO rupture leading to a de-epoxidation process. This binder-free electrode demonstrated high cycling performance and ultrahigh volumetric capacitance of 612 F cm3 , being 10 times higher than the activated carbon used in the current industry. The study represents a step forward towards the fabrication of flexible, high-energy density supercapacitors.
School/Discipline
Dissertation Note
Provenance
Description
Access Status
Rights
© 2018 Elsevier Ltd. All rights reserved.