Facile synthesis, structure, and battery-type behavior of graphene oxides
In: Cerâmica, Jg. 69 (2023), Heft 390, S. 161-171
Online
academicJournal
Zugriff:
Abstract Graphene oxide (GO) is one of the main precursors for the production of graphene and other graphene-based materials. We report a simple, safe, and fast synthesis method to obtain graphene oxide as a functional material for battery-type electrodes. Washing and lyophilization processes were performed to evaluate their effects on exfoliation and removal of functional groups from graphene sheets. Sample GO1 consisted of a 10-layer stack of oxidized graphene, while sample GO2 had 8 stacked layers. The difference between them was an extra washing and lyophilization process in the GO2 sample. The electrochemical performance of graphene oxide-based electrodes, classified as battery-type, indicated an improved specific capacity of 10.15 C.g-1 for GO1 against 4.55 C.g-1 for GO2 at a specific current of 0.5 A.g-1. This superior battery-type behavior of the GO1 electrode, also confirmed by electrochemical impedance spectroscopy, was most likely due to a higher degree of oxygenated groups on its surface, as shown by energy dispersive spectroscopy (EDS) and Fourier transform infrared spectroscopy (FTIR) studies.
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Facile synthesis, structure, and battery-type behavior of graphene oxides
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Autor/in / Beteiligte Person: | Silva, J. M. D. ; Fenandes, F. P. M. ; M. de O. Silva ; Maraschin, T. G. ; Ferreira, L. S. ; Macedo, D. A. ; L. B. da Silva ; F. de C. Fim |
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Zeitschrift: | Cerâmica, Jg. 69 (2023), Heft 390, S. 161-171 |
Veröffentlichung: | Associação Brasileira de Cerâmica, 2023 |
Medientyp: | academicJournal |
ISSN: | 1678-4553 (print) ; 0366-6913 (print) |
DOI: | 10.1590/0366-69132023693903474 |
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