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Developing highly porous and conductive carbon electrodes are crucial for high-performance electrochemical double-layer capacitors. Herein, we provide a supercapacitor electrode material consisting of N-doped porous carbon tightly anchored on carbon nanotubes. This nanocomposite with high specific surface area of 659.5 m 2 g −1 is fabricated by pyrolyzing the ZIF-8/polypyrrole nanotubes. When the nanocompiste is used as supercapacitor electrodes, it deliveres high specific capacitance of 248 F g −1 and 97.3% of capacitance retention after 3000 cycles. The superior capacitive performance is attributed to the conductive network for electron transport constributed by CNTs and the abundant reservoir for the charge storage derived from ZIF-derived porous carbon. Benefiting from the unique structural features and high N doping, the PC-CNTs obtained by our route could be a promising candidate of electrode mateials for high-performance supercapacitors. [ABSTRACT FROM AUTHOR]

N-doped porous carbon nanosheets were prepared from glucose with g-C 3 N 4 derived from dicyandiamide as a self-sacrificed template, which have a high nitrogen content of 12.01 at.% and a specific surface area of 492.7 m 2  g −1 . The unique structure allows for exhibiting high specific capacitance of 250.64 F g −1 and excellent rate capability. [ABSTRACT FROM AUTHOR]