Preparation and capacitive performance of PVDC-based activated carbon

Activated carbon electrode material for supercapacitor was prepared from polyvinylidene chloride(PVDC) as raw material by steam activation.The specific surface area and pore structure of the material were studied by N2 adsorption method.The electrochemical performance of the material in 6 mol/L KOH solution was analyzed by galvanostatic charge-discharge and cyclic voltammetry tests.The results showed that activated carbon material with high specific surface area(2 296 m2/g) and abundant mesopores(mesoporosity ratio was 42.7%) could be prepared by this method at 900 ℃.It was suitable for electrode material of supercapacitor.The activated carbon prepared at 880 ℃ and activated for 1 h had the specific capacitance of 177 F/g(50 mA/g) and good large current rate performance.