Journal
APPLIED SURFACE SCIENCE
Volume 457, Issue -, Pages 1018-1024Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2018.07.047
Keywords
ZIF-8; CNTs; Polypyrrole; Supercapacitors
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Funding
- Natural Science Foundation of China [51572140, 21703209]
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Developing highly porous and conducive 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 conducive 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.
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