Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Synthesis and characterization of flexible carbon fibers coated with polyaniline/manganese hexacyanoferrate nanoparticles for supercapacitors
Submission Author:
Mariana Maier , RJ
Co-Authors:
SURESH BABU RAJENDRAN, Daniel Sampaio, Ana Barros, Mariana Maier
Presenter: Mariana Maier
doi://10.26678/ABCM.COBEM2017.COB17-2232
Abstract
The growing technological advances bring the search for renewable energy sources, as well as electronic devices ever-smaller, flexible, more efficient and sustainable. The electrochemical capacitors, also called supercapacitors, comply with all previous requirements, as they are capable to store and release an amount of electrical load better than conventional electrolytic capacitors and faster than batteries, which are most frequently used. Conventional capacitors store energy in the electrostatic form through the separation of the electrode and the dielectric, which can be made of ceramic, insulating plastic films, polypropylene film, aluminum oxide, etc. On the other hand, batteries are made of metals and/or acids and store energy through an electrochemical process, in which occurs the transfer of ions between the electrode and the electrolyte. Supercapacitors can storage energy from both types separately (electrochemical double layer capacitor – EDLC or pseudocapacitor) or at the same time (hybrid capacitor), which turns them into a potential device to replace batteries and conventional capacitors. Carbonaceous materials are highlighted in the study of supercapacitors due to its morphology and good electrical conductivity. However, besides carbon, metals, metal oxides, metal hexacyanoferrates and conducting polymers have also been used because of their chemical properties, such as reduction and oxidation (redox) reactions. The aim of this work is to develop flexible carbon fiber electrodes with manganese hexacyanoferrate and polyaniline electrodeposition, being as a low-cost, long-term and flexible alternative in the supercapacitors’ composition. To accomplish that, physical and electrochemical characterizations of electrodes were employed to testify their good performance
Keywords
Polyaniline, manganese hexacyanoferrate, supercapacitors, energy storage
