Development of boron doped and biomass based carbon supercapacitor materials

Storing the produced energy for later use is called energy storage. There are various types of energy storage systems. Supercapacitor is one of the energy storage systems with high energy and power density, high cycle life, fast charge / discharge features. Many studies have been carried out on the development of electrode material to increase the energy storage capacity and energy density of supercapacitors. Carbon-based materials are also used as the supercapacitor electrode material. In this study, the carbon energy storage material has been developed from a renewable biomass resource. Local tea wastes were used as renewable biomass. Carbonized material was derived by pyrolysis of tea waste biomass. Graphitization, activation and heteroatom / boron doping processes have been applied to increase the energy storage capacity of the derived carbon material. In addition, the improvement of particle size with nitric acid and the change of energy storage properties were also investigated. Detailed characterizations of the obtained electrode materials were made by Brunauer–Emmett–Teller (BET), Scanning Electron Microscopy (SEM), X-ray diffraction analysis (XRD), Fourier Transform Infrared Spectroscopy (FT-IR), Thermogravimetric analysis (TGA), particle size distribution methods. Electrochemical measurements (CV measurement) were carried out with a three-electrode system to determine capacitances. It was observed that developed BC-B-Y-KOH2-B2 material has the highest half cellenergy storage capacity with 69,3 F / g. With graphitization, activation and doping processes, it has been shown that the amorphous structure can be improved, energy storage capacity can be increased and renewable tea waste biomass can be used as energy storage material.