Symmetrical supercapacitor application with low activated carbon content [Düşük aktif karbon içerikli simetrik süperkapasitör uygulamasi]

The electrochemical performance of a supercapacitor containing 40% activated carbon was investigated in different aqueous electrolytes using the galvanostatic charge-discharge technique. average specific capacitance values were found to be 104 f/g,92 f/g and 71 f/g respectively with 1.0 m h2so4,6.0 m koh and 0.5 m na2so4. the highest average capacitance value (104 f/g) were achieved with sulphuric acid probably due to its higher ionic conductivity was found on the surface of the carbon electrodes. charge-discharge cycles is based on electrostatic charge accumulation mechanism only and supercapacitor exhibited semi-capacitive and reversible behaviour similar to an electrochemical double-layer capacitor. while specific energy density value was obtained between 4-10 w h/kg,the specific power output value was between 100-1100 w/kg. supercapacitor shows semi-capacitive and a reversible behavior and low equivalent series resistance (esr) values (less than 1 î ©) were obtained with graphitic carbon additive. however,a good electrochemical performance depends on low (esr) and use of electrolytes compatible with electrode material that allowing uniform pore size distribution and high surface area.