Study on two electrodes assembled electrochemical cell of Fe@ACF electrodes for application in supercapacitor

Full text: Interest in renewable energy sources based on readily available materials and low-cost technologies has led to new studies on energy storage systems. The ability to increase the energy transmitted from clean energy generation systems with high life cycle, high power and energy density, and the functionality of devices with simple configuration justify the interest in the research associated with the materials used in supercapacitors. Taking into account the increase in energy density in supercapacitor devices, the microporosity presented by carbonaceous materials has been studied for application in electrodes. Carbon fibers have high adsorption capacities, and other attractive characteristics for this application. The aim of this work is to study of the deposition of iron in an activated carbon fiber felt (ACF) with different oxidation conditions, for application as electrode in supercapacitor. With the spontaneous deposition of iron, from saline solutions of the metal, the improvement of capacitive effect is sought. The deposition influence of metallic particles, as well as their interaction with the felt, was analyzed. The morphological and structural characterization were performed using X-ray diffraction (XRD), high resolution scanning electron microscopy (FEG), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. The behavior of the felt with metallic particles deposited was characterized electrochemically by galvanostatic charge/discharge curves and cyclic voltammetry. Properties related to surface chemistry, obtained from the characterization of the material, demonstrate an increase in the performance with a great potential for application in supercapacitors. (author)