Hard template–salt template double template preparation of heteroatom-doped hierarchical porous carbon and its electrochemical properties

. And the capacity retention rates of AF-MMTC5 is 85.1%. The good electrochemical properties of AF-MMTC5 indicate that it has great potential for application in supercapacitor electrode materials. In addition, the results provide useful information for the preparation of hierarchical porous carbon with high specific surface area.