Characterization of activated carbon felts with different oxidations for application as electrode in supercapacitor

• DOI: 10.22533/at.ed.317372315035

• Palavras-chave: Electrochemistry, Carbon Fiber, Torque, capacitance

• Keywords: Electrochemistry, Carbon Fiber, Torque, capacitance

• Abstract:

  The project aims to study the morphology, structure and electrochemistry of activated carbon fiber. The production of these felts is divided into two stages: thermal oxidation and carbonization. Therefore, samples were prepared with different times (0, 90 and 135 min) of thermal oxidation exposure at 250 °C, which after the oxidation process were carbonized at 900 °C in an argon atmosphere. This way, the project focuses on carrying out tests in a cell with two electrodes of the Swagelok type to simulate a supercapacitor, in which charge/discharge curves are simulated to study how the fiber reacts when receiving and discharging electric charge, cyclic voltammetry for analyze its pseudocapacitive profile and electrochemical impedance of the samples, to analyze the resistances in the device. For the morphological and structure study, Raman and XPS spectroscopy were carried out, thus making it possible to analyze changes in the graphitic and chemical structure of the surface.