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

Author(s)

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

Affiliation

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

• Document type: Journal article
• Source: Journal of Alloys and Compounds; v. 788, p. 453-460, JUN 5 2019.
• Web of Science Citations: 3

Abstract

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)

• FAPESP's process: 16/13393-9 - Semiconductor, polymeric, and carbonaceous composite electrodes ayming the synergy between water cleaning and energy storage processes
• Grantee: Neidenei Gomes Ferreira
• Support Opportunities: Regular Research Grants