Eventos Anais de eventos
CONEM 2018
X Congresso Nacional de Engenharia Mecânica
Hydrothermal Synthesis of Nickel Oxide for Supercapacitors Applications
Submission Author:
Gabriela Sánchez , RJ , Brazil
Co-Authors:
Gabriela Sánchez, SURESH BABU RAJENDRAN, Mariana Maier, Daniel Sampaio, Ana Barros
Presenter: Gabriela Sánchez
doi://10.26678/ABCM.CONEM2018.CON18-0296
Abstract
In this work, hydrothermal synthesis of nickel oxide with surfactant and template was realized in two different temperatures as electrodes for applications in supercapacitors. The synthesized NiO were coated on nickel foam substrates (NiO/NF). The NiO is used because of its low cost and high capacitance, and the NF was chosen as a substrate, due to it high conductivity and porosity that improve the material adherence and the supercapacitor performance. These properties turn the electrodes ideal for supercapacitors applications. The electrodes were analyzed and compared through cyclic voltammetry, charge-discharge test and electrochemical impedance spectroscopy characterizations. At the current density of 1 A/g, the electrode synthesized at 500ºC reached 145 F/g specific capacitance, showing better capacity of storing energy in comparison with the NiO synthesized at 300 °C (121.85 F/g) at the same current density, while at current densities higher than 1.5 A/g, the NiO synthesized at 300° showed better specific capacitance results.
Keywords
supercapacitors, nickel foam, hydrothermal method, nickel oxide
