Flexible polyaniline/reduced graphene oxide/carbon fiber composites applied as electrodes for supercapacitors

Autor(es)

Almeida, D. A. L. ^[1] ; Couto, A. B. ^[1] ; Ferreira, N. G. ^[1]

Afiliação do(s) autor(es)

^[1] INPE, Lab Associado Sensores & Mat, Av Astronautas 1758, BR-12227010 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Alloys and Compounds; v. 788, p. 453-460, JUN 5 2019.
• Citações Web of Science: 3

Resumo

Electrochemical supercapacitor (EC) is a kind of device able to generate and store clean energy, which makes it the object of intense research. This work proposes a double layer capacitance combination of electrochemical reduced graphene oxide (rGO) and carbon fiber (CF) in addition to pseudocapacitive behavior of polyaniline (PAni) to produce PAni/rGO/CF ternary composite with high capacitive response. rGO/CF and PAni/rGO/CF are obtained by electrochemical methodology. The morphological and structural analyses by scanning electron microscopy, X-ray diffraction, and Raman spectroscopy show that these nanostructured composite materials can be produced successfully. rGO/CF and PAni/rGO/CF samples are evaluated electrochemically by cyclic voltammetry (CV), electrochemical impedance spectroscopy, and charge/discharge tests. PAni/rGO/CF ternary composite presents a better performance in terms of specific capacitance and electrochemical reversibility than that of rGO/CF composite and CF electrodes. The results show that this ternary composite can be a promising electrode for applications in supercapacitors. (C) 2019 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 16/13393-9 - Eletrodos compósitos carbonosos, poliméricos e semicondutores visando a sinergia entre processos de limpeza de água e de armazenamento de energia
• Beneficiário: Neidenei Gomes Ferreira
• Modalidade de apoio: Auxílio à Pesquisa - Regular