Multidimensional Co-Exfoliated Activated Graphene-Based Carbon Hybrid for Supercapacitor Electrode
No Thumbnail Available
Access rights
openAccess
acceptedVersion
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2019-01-01
Department
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
Energy Technology
Abstract
Herein, a simple route for the fabrication of highly porous-activated few-layer graphene for application in supercapacitors as an electrode material is reported. The process makes use of natural and renewable materials, which is an essential prerequisite, especially for large-scale application. Few-layer graphene is exfoliated in aqueous suspension with the aid of microfibrillated cellulose (MFC), an environmentally benign eco-friendly medium that is low-cost, biodegradable, and sustainable. The exfoliated product is subsequently activated to increase the surface area and to form the desired pore structure. The prepared electrode materials exhibit a high surface area of up to 720 m2 g−1. MFC is also used as a nontoxic environmentally friendly binder in the electrode application. The electrochemical performance is evaluated in a three-electrode system, and the prepared samples show a high specific capacitance of up to 120 F g−1 at a current density of 1 A g−1. The samples also exhibit a high capacity-retention rate of about 99% after 5000 cycles and 97% after 10 000 cycles. The proposed method for the fabrication of graphene-based supercapacitor electrode materials, based largely on renewable and sustainable materials, offers potential for commercially viable applications.Description
Keywords
activated carbon, carbon hybrids, electrode, graphene, nano-microfibrillated cellulose, supercapacitors
Other note
Citation
Phiri, J, Gane, P & Maloney, T C 2019, ' Multidimensional Co-Exfoliated Activated Graphene-Based Carbon Hybrid for Supercapacitor Electrode ', Energy Technology . https://doi.org/10.1002/ente.201900578