Characteristics of Hierarchical Porous Carbon Nanoparticle for Electrode of Supercapaciotr

초록

Hierarchical porous carbon (HPC) nanoparticles with high surface area and interconnected pores are prepared based on the template of a polystyrene-core with mesoporous silica shell. The average diameter of these HPCs is 200 nm. To synthesize HPCs, crosslinked polystyrene was obtained by using AlCl3 and carbonized to form mesopores in silica shell. The silica shell was then etched, and activated by using Teflon to obtain meso-, micro- and macropore interconnected HPCs. The electrochemical performances of the prepared electrodes employing the HPCs were measured by cyclic voltammetry (CV) and charge-discharge tests. High capacitance of the HPCs could be attributed to the well-developed, hierarchical interpenetrating network structure of macro-, meso- and micropores, which facilitates not only fast charge transfer but also facile electrolyte movement to access the inner pores. The properties of carbon materials are characterized by Raman, element analysis (EA) and X-ray diffraction (XRD).