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Facile synthesis, structure, and battery-type behavior of graphene oxides
- Source :
- Cerâmica, Vol 69, Iss 390, Pp 161-171 (2023)
- Publication Year :
- 2023
- Publisher :
- Associação Brasileira de Cerâmica, 2023.
-
Abstract
- 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.
Details
- Language :
- English, Portuguese
- ISSN :
- 16784553 and 03666913
- Volume :
- 69
- Issue :
- 390
- Database :
- Directory of Open Access Journals
- Journal :
- Cerâmica
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.48d434c19f0b4918948fb342a14d73c7
- Document Type :
- article
- Full Text :
- https://doi.org/10.1590/0366-69132023693903474