Research On The Preparation And Electrochemical Performances Of Mesoporous Carbons As Electrode Material For Supercapacitor

High performance mesoporous carbon is the key component of supercapacitor using organic electrolyte. A series of mesoporous carbons with different pore structure have been synthesized by tuning the mass ratio of activation reagent (or template reagent) to carbon source with different preparation method. And the relationship between the pore structure and performances of the mesoporous carbons has been investigated.Soluble glucose and ZnCl₂ were used as carbon source and activation reagent for the first time to accomplish the homogeneous mixing at the molecular level of them. A series of high performance mesoporous carbons whose highest surface area and highest specific capacitance are confirmed to be 1539m²Â·g^-1 and 95.8F·g^-1, respectively with different pore structure and with narrow pore size distribution have been prepared by chemical activation method based on "two-stage sintering" process. The prepared porous carbons comprise three phases: disordered carbon, graphite and cubic carbon. "Fit linear method by grouping" has been proposed to obtain the effective surface area and surface-area specific capacitance. The least pore size that can form electric double layer is confirmed to be 2nm for porous carbon in 1M Et₄NBF₄ | PC electrolyte. Porous carbon with abundant mesopore is featured with good rate capability.A series of mesoporous carbons whose highest surface area and highest specific capacitance are confirmed to be 883m²Â·g^-1 and 74.7F·g^-1, respectively with different pore structure have been prepared by silica sol template method using silica sol as template and glucose as carbon source in order to research the relationship between the pore structure and the performance of carbon material with larger pore size. The results show that the rate...