X-ray diffraction evaluation of the average number of layers in thermal reduced graphene powder for supercapacitor nanomaterial
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2019
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Materials Science Forum
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Graphene oxide (GO) can be partially reduced to graphene-like sheets by removing the
oxygen-containing groups and recovering the conjugated structure. In this work, the thermal
reduction of GO powder has been carried out using back pumping vacuum pressures and
investigated employing X-ray diffraction analysis. The experimental results of estimating the
number of graphene layers on the reduced powder at various temperatures (200 – 1000 °C) have
been reported. Electrical changes have been produced in a graphene oxide with the vacuum
reduction process. This study has shown that the ideal processing temperature for reducing
graphene oxide nanomaterial was about 400 oC. It has also been shown that at 600 oC the number of
layers in the reduced nanomaterial increased. The internal series equivalent resistance (ESR) has
been improved substantially with the vacuum thermal treatment even at temperatures above 400 oC.
ESR was reduced from 95.0 to about 13.8 Ω cm2 with this processing. These results showed that the
process can be applied to the reduction of graphene oxide to produce supercapacitor nanomaterials.
The advantage of employing this method is that the processing is a straightforward and low cost
thermal treatment that might be used for large amount of nanocomposite material.
Como referenciar
CARDOSO, QUEZIA de A.; CASINI, JULIO C.S.; BARBOSA, LUZINETE P.; SERNA, MARILENE M.; GALEGO, EGUIBERTO; SOBRINHO, LUIZA F.; SAKATA, SOLANGE K.; FARIA JUNIOR, RUBENS N. de. X-ray diffraction evaluation of the average number of layers in thermal reduced graphene powder for supercapacitor nanomaterial. Materials Science Forum, v. 958, p. 117-122, 2019. DOI: 10.4028/www.scientific.net/MSF.958.117. Disponível em: http://repositorio.ipen.br/handle/123456789/30537. Acesso em: 19 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.