Abstract
Reduced graphene oxide (rGO) is an ideal candidate for the improvement of supercapacitor (SC) performances due to its industrial-ready manufacturing process and ease of processing. In this work, rGO was used as an active binder for the manufacture of carbon black (CB) and rGO-based SCs. Being able to form a stable suspension in water, graphene oxide (GO) was initially exploited as a dispersing agent to fabricate a homogeneous slurry with CB having exclusively water as a low-cost and environment-friendly solvent. After casting on a suitable substrate, the material was subjected to thermal treatment allowing the reduction of GO to rGO, which was successively confirmed by chemical−physical analysis. An innovative current collector, consisting of high-quality rGO paper, was also proposed ensuring an improved adhesion between the active material and the substrate and a reduction of the whole weight with respect to devices fabricated using common metallic current collectors. Due to the interesting electrochemical performances, with a high specific power of 32.1 kW kg−1 and a corresponding specific energy of 8.8 Wh kg−1 at a current of 1 A g−1, and the improved manufacturing process, the described “all-graphene-based” device represents a valuable candidate for the future of SCs.
Original language | English |
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Pages (from-to) | 32426-32435 |
Number of pages | 10 |
Journal | ACS OMEGA |
Volume | 5 |
Issue number | 50 |
Early online date | 10 Dec 2020 |
DOIs | |
Publication status | Published - 22 Dec 2020 |
Bibliographical note
Publisher Copyright:© 2020 The Authors. Published by American Chemical Society
Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.
ASJC Scopus subject areas
- General Chemistry
- General Chemical Engineering
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