abstract
Electrode materials for electrochemical capacitors or supercapacitors (SCs) are widely studied, as they are needed for the development of energy storage devices in electrical vehicles and flexible electronics. In the current work, a self-supported paper of reduced graphene oxide (rGO) with polycarbonate (PC) (as rGO-PC composite) was prepared by simple vacuum filtration and low-temperature annealing. rGO-PC as a freestanding single electrode was studied in a three-electrode system and presented a capacitive energy storage mechanism. To fabricate SCs based on rGO-PC, flexible polyethylene terephthalate (PET) with layers of both Cu tape (Cu tape) and carbon tape (C tape) (PET/Cu/C), as well as PET covered by graphene ink (PET/GrI), were used as supports. Fabricated flexible symmetric SCs have shown similar behavior with a higher areal capacitance value than that on PET/Cu/C substrate.
keywords
HIGH-PERFORMANCE; FILM ELECTRODES; ENERGY-STORAGE; CARBON; CAPACITANCE; COMPOSITES
subject category
Materials Science
authors
Okhay, O; Bastos, AC; Andreeva, K; Tuukkanen, S; Tkach, A
our authors
António Alexandre Cunha Bastos
Assistant Researcher
Oleksandr Tkach
Assistant Researcher
Olena Okhay
Post-Doc FellowshipGroups
G2 - Photonic, Electronic and Magnetic Materials
G3 - Electrochemical Materials, Interfaces and Coatings
acknowledgements
This article is funded by national funds, through FCT-Fundacao para a Ciencia e a Tecnologia, in the scope of the framework contract foreseen in numbers 4, 5 and 6 of article 23 of the Decree Law 57/2016, of 29 August and UIDB/00481/2020 and UIDP/00481/2020, and CENTRO-01-0145-FEDER-022083-Centro Portugal Regional Operational Programme (Centro2020), under the PORTUGAL 2020 Partnership Agreement, through the European Regional Development Fund. Olena Okhay acknowledges the European Consortium of Innovative Universities (ECIU) for its support with a research mobility grant to the University of Tampere. Alexander Tkach acknowledges the project CICECO Aveiro Institute of Materials (UIDB/50011/2020 and UIDP/50011/2020), financed by national funds through the FCT/MCTES and, when appropriate, co-financed by FEDER under the PT2020 Partnership Agreement.