Research in coal-based activated carbon for supercapacitor

In order to study the influence of coal-based activated carbon electrode on the performance of supercapacitor.According to the working principle of the supercapacitor,the influences of specific surface area,pore size distribution,surface functional groups,degree of graphitization,ash content and granularity of activated carbon on the electrochemical performance were systematically investigated.It shows that proper proportion of mesopore and proper granularity are in favour of the diffusion of the electrolyte ions; Oxygen-containing functional groups and nitrogen-containing functional groups can improve the wettability of electrode materials; the pore structure of amorphous carbon is well-developed,as activated carbon materialsuitable; reducing the ash content can improve the charge and discharge characteristic and the rate performance.