Method of nitrogen doping of carbonaceous material and nitrogen doped activated carbon for electrodes of supercapacitor

摘要

The nitrogen doped activated carbon has a network of interconnected pores containing mesopores of a width of 2x10 - 9to 50x10 - 9. Nitrogen content on surface of the pores in atom percentage is greater than 10 percent. Nitrogen content inside the body of the activated carbon is not less than 8 percent by weight. Nitrogen on the surface of the pores has tertiary heteroatom shape incorporated in the carbon-nitrogen bonds. The pores also contains micropores with a width not less than 2x10 - 9. The maximum distribution of these pores along the width of the mesopores and micropores is between 10 - 9and 3x10 - 9. The specific volume of the mesopores is 20-80 percent of the specific total volume of the pores. The activated carbon is produced by initially forming a composition from the first material containing carbon and second material containing nitrogen. The composition is then thermally treated in an inert gas atmosphere forming nitrogen dopes carbon. The first and second materials contain powder of different solid particles. The first solid particles consist of activated coal. The second activated particles contain triazine derivatives containing melamine. The thermal treatment is carried out in two stages. During the first stage the composition is heated to 720-850 [deg] C and during the second the stage this temperature is maintained for at least 60 minutes.