Nitrogen self-doped porous lamellar carbon with superior electrochemical performance

A novel nitrogen self-doped porous lamellar carbon materials were prepared by pyrolysis method, in which metal-free phthalocyanine used as a carbon source, and nanosized SiO 2 and SWCNTs used as templates at the same time. The mesoporous structure is contributed by the nanosized SiO 2 self-sacrificing template, and the microporous structure is produced by pyrolysis of Pc/SWCNTs. By adjusting the ratio between SWCNTs, nanosized SiO 2 , and phthalocyanine, the microscopic morphology and the electrochemical performance of porous carbon materials can be regulated. Benefit from its superior pore structure and large specific surface area, the nitrogen self-doped porous lamellar carbon materials show excellent electrochemical performance. When the mass ratio of the three was Pc/SWCNTs/SiO 2  = 1:0.05:0.5, the nitrogen self-doped porous lamellar carbon material shows the largest specific capacity of 283.9 F/g at 1 A g −1 as a supercapacitor anode material . And after 5000 cycles, the composite material still maintained a specific capacity of 88.7 %, demonstrating excellent stability. The specific capacity under the two-electrode system of Sample 3 is 260.36 F/g, showing high energy density and power density (36.2 Wh/kg, 1041.2 W/kg). Therefore, this nitrogen self-doped porous lamellar carbon material has potential value as a supercapacitor anode material.