N-doped porous carbon anchoring on carbon nanotubes derived from ZIF-8/polypyrrole nanotubes for superior supercapacitor electrodes-Huiqi Wang

Developing highly porous and conductive carbon electrodes are crucial for high-performance electrochemicaldouble-layer capacitors. Herein, we provide a supercapacitor electrode material consisting of N-doped porouscarbon tightly anchored on carbon nanotubes. This nanocomposite with high speci?c surface area of 659.5 m2g?1is fabricated by pyrolyzing the ZIF-8/polypyrrole nanotubes. When the nanocompiste is used as super-capacitor electrodes, it deliveres high speci?c capacitance of 248 F g?1and 97.3% of capacitance retention after3000 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.Bene?ting from the unique structural features and high N doping, the PC-CNTs obtained by our route could be apromising candidate of electrode mateials for high-performance supercapacitors.

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