Characterization of the porous carbon prepared by using halloysite as template and its application to EDLC

A porous carbon was prepared using halloysite as a template and sucrose as carbon source by means of template method. Nitrogen adsorption analysis showed that the obtained porous carbon material possess a wide pore size distribution and a large pore volume, especially in the range of mesopores. The application of the resultant carbon for electrodes of electric double layers capacitor (EDLC) in organic LiPF6/PE+CE electrolyte indicated that the specific capacitance, as high as 232 F/g at a current density of 0.05 mA/cm2, was larger than for commercially activated carbons. Cyclic voltammetry (CV) also showed that the performance of templated carbon in 1 mol/l aqueous solution of H2SO4 was better at a large scan rate than for the commercial activated carbons.