Momordica grosvenori shell-based biomass porous carbon as well as preparation method and application thereof

The invention discloses siraitia grosvenorii shell-based biomass porous carbon which is prepared by the following steps: by taking siraitia grosvenorii shells as raw materials, carrying out pre-carbonization and activation treatment to obtain a siraitia grosvenorii shell-based biomass porous carbon material with a microtopography of a honeycomb structure; the content of pyrrole N is 30-32%; the ID/IG value ranges from 1.07 to 1.08, the specific surface area ranges from 3900 m < 2 >. G to 4000 m < 2 >. G , and the pore size distribution ranges from 1.8 nm to 2.0 nm. The preparation method comprises the following steps: 1, pre-carbonizing a siraitia grosvenorii shell-based precursor; and 2, preparing the momordica grosvenori shell-based biomass porous carbon. When the supercapacitor is used as a supercapacitor, the specific capacitance value range is 350-370 F * g under the current density of 0.5 A * g ; and after 10000 times of circulation, the specific capacitance retention rate is 95-97