Development of Three Electrode System for Optimizing the Parameters of Hybrid Capacitor

Objectives: To fabricate the hybrid capacitor by novel configuration and implementation of prototypes with hybrid capacitor making processes at laboratory. The purpose of this investigation is to study the effect of novel configuration in comparison with conventional two electrodes. Many researchers have concentrated on the materials used for making hybrid capacitors and very little research is available on configuration of electrodes used for hybrid capacitor which is important for further development but unfocused area. Methods: The prototypes were made by simple mixture and loading technique of electrode material. Polyethylene sheets were used as separators to prevent the short circuit between the electrode and aqueous potassium sulphate solution used as electrolyte. Statistical Analysis: The charging-discharging cycle analysis gives parameters of hybrid capacitor i.e., energy density, power density, internal resistance, specific capacitance for developed prototypes. The parameters for developed prototypes and conventional two electrode hybrid capacitor prototypes were observed. Comparative analysis for various parameters of developed prototypes was conducted and readings noted down. Findings: From charge-discharge test of hybrid capacitor it was concluded that the higher values for energy density, power density and specific capacitance can be obtained by using novel configuration of electrodes. The graphical analysis from charge-discharge test demonstrated decrease in internal resistance. It was also found that in case of hybrid capacitor with three electrodes with extra non faradic systems all the parameters are higher than conventional hybrid capacitor and hybrid capacitor three electrode system with extra faradic. Applications: Hybrid capacitors have high energy density compared to super-capacitors with better long term cycling ability. Due these additional advantages hybrid capacitors have attractive applications where high current pulses are repeatedly required. This technology is yet coming up to develop high grade hybrid capacitor which may replace batteries or may work along with the batteries in near future.