Phosphorus/sulfur-enriched reduced graphene oxide papers obtained from recycled graphite: solid-state NMR characterization and electrochemical performance for energy storage

Dublin Core

Título

Phosphorus/sulfur-enriched reduced graphene oxide papers obtained from recycled graphite: solid-state NMR characterization and electrochemical performance for energy storage

Tema

GRAFENO
RESONANCIA MAGNETICA NUCLEAR
ELECTROQUIMICA
BIBLIOGRAFIA NACIONAL QUIMICA
2023

Abstract

The reduction of graphene oxide (GO) by means of thermal and/or chemical treatments leads to the production of reduced graphene oxide (rGO)—a material with improved electrical conductivity and considered a viable and low-cost alternative to pure graphene in several applications, including the production of supercapacitor electrodes. In the present work, GO was prepared by the oxidation of graphite recycled from spent Li-ion batteries using mixtures of sulfuric and phosphoric acids (with different H2SO4/H3PO4 ratios), leading to the production of materials with significant S and P contents. These materials were then thermally reduced, resulting in rGO papers that were investigated by solid-state 13C and 31P nuclear magnetic resonance, along with other methods. The electrochemical properties of the produced rGO papers were evaluated, including the recording of cyclic voltammetry and galvanostatic charge–discharge curves, besides electrochemical impedance spectroscopy analyses. The samples obtained by thermal reduction at 150 ◦C exhibited good rate capability at high current density and high capacitance retention after a large number of charge– discharge cycles. The results evidenced a strong relationship between the electrochemical properties of the produced materials and their chemical and structural features, especially for the samples containing both S and P elements. The methods described in this work represent, then, a facile and low-cost alternative for the production of rGO papers using graphite recycled from spent batteries, with promising applications as supercapacitor electrodes.

Autor

Vieira, Mariana A.
Costa, Tainara L. G.
Gonçalves, Gustavo R.
Cipriano, Daniel F.
Schettino, Miguel A., Jr.
da Silva, Elen L.
Cuña, Andrés

Fuente

C Journal of Carbon Researchv.9, n°2, 2023.

Editor

MDPI

Fecha

2023

Derechos

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Formato

PDF

Extent

17 p.

Idioma

Inglés

Tipo

Artículo

Identificador

10.3390/c9020060

Document Item Type Metadata

Original Format

PDF
Fecha de agregación
October 25, 2023
Colección
Bibliografía Nacional Química
Tipo de Elemento
Document
Etiquetas
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Citación
Vieira, Mariana A., “Phosphorus/sulfur-enriched reduced graphene oxide papers obtained from recycled graphite: solid-state NMR characterization and electrochemical performance for energy storage,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed July 12, 2024, https://riquim.fq.edu.uy/items/show/6727.
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