▎ 摘　　要

NOVELTY - Preparation of nitrogen-doped carbon fiber-coated graphene-like interlayer composite material involves expanding expandable graphite raw material using microwave expansion method for 15-60 seconds to obtain expanded graphite, adding cetyltrimethylammonium bromide to acidic solution, stirring to dissolve, adding expanded graphite and ammonium persulfate, magnetically stirring, continuously stirring, placing in an ice-water bath at 0-5 degrees C, adding pyrrole monomer at rate of 15-30 drops/minute, continuously reacting for 12-36 hours, washing with washing solution, drying at 60-100 degrees C for 6-12 hours to obtain intermediate material, placing the intermediate material in an atmosphere tube furnace, heating at 700-900 degrees C under heating rate of 2-10 degrees C/minute and inert gas atmosphere, maintaining temperature at 700-900 degrees C for 1-5 hours and cooling to room temperature. USE - The method is useful for preparation of nitrogen-doped carbon fiber-coated graphene-like interlayer composite material. ADVANTAGE - The method enables preparation of nitrogen-doped carbon fiber-coated graphene-like interlayer composite material with high specific capacitance. The nitrogen-doped carbon fiber-coated graphene-like interlayer composite material is to solve the lack of pore structure of existing carbon materials, and can not improve the transmission efficiency of electrolyte ions. DETAILED DESCRIPTION - Preparation of nitrogen-doped carbon fiber-coated graphene-like interlayer composite material involves expanding expandable graphite raw material using microwave expansion method for 15-60 seconds to obtain expanded graphite, adding cetyltrimethylammonium bromide to acidic solution, stirring to dissolve, adding expanded graphite and ammonium persulfate, magnetically stirring, continuously stirring, placing in an ice-water bath at 0-5 degrees C, adding pyrrole monomer at rate of 15-30 drops/minute, continuously reacting for 12-36 hours, washing with washing solution, drying at 60-100 degrees C for 6-12 hours to obtain intermediate material, placing the intermediate material in an atmosphere tube furnace, heating at 700-900 degrees C under heating rate of 2-10 degrees C/minute and inert gas atmosphere, maintaining temperature at 700-900 degrees C for 1-5 hours and cooling to room temperature. The mass ratio of cetyltrimethylammonium bromide and acidic solution is (10-20 g):(100-500 ml). The mass ratio of expanded graphite and cetyltrimethylammonium bromide is (1-5):(10-20). The mass ratio of expanded graphite and ammonium persulfate is (1-5):(5-20). The mass ratio of expanded graphite and pyrrole monomer is (1-5 g):(10-30 ml).