Boron-sulfur-codoped porous carbon material and preparation method and use thereof

Abstract

A boron-sulfur-codoped porous carbon material and a preparation method is disclosed. The boron-sulfur-codoped porous carbon material includes a porous carbon, and B and S doped in the surface and pores of the porous carbon; where B has a doping content of 5.56 wt. % to 7.85 wt. %, and S has a doping content of 0.90 wt. % to 1.55 wt. %. Test results of examples show that the boron-sulfur-codoped porous carbon material has high doping contents of B and S, and abundant pores; in a three-electrode system, the material shows a maximum specific capacitance of 168 F·g−1 to 290.7 F·g−1 at 0.5 A·g−1; after the material is assembled into a symmetrical supercapacitor, the supercapacitor has an ultra-high energy density of 11.3 Wh·kg−1 to 16.65 Wh·kg−1 in a neutral electrolyte system, and has a capacitance retention rate of 97.09% to 100.67% after 10,000 life tests.

Dependencies are inferred from the claim text.