In Situ Growth of MnO2 Nanosheets on N‐Doped Carbon Nanotubes Derived from Polypyrrole Tubes for Supercapacitors

Nitrogen‐doped porous carbon nanotubes@MnO2 (N‐CNTs@MnO2) nanocomposites are prepared through the in situ growth of MnO2 nanosheets on N‐CNTs derived from polypyrrole nanotubes (PNTs). Benefiting from the synergistic effects between N‐CNTs (high conductivity and N doping level) and MnO2 nanosheets (...

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Bibliographic Details
Published in:Chemistry, an Asian journal an Asian journal, 2018-03, Vol.13 (5), p.545-551
Main Authors: Ou, Xu, Li, Qi, Xu, Dan, Guo, Jiangna, Yan, Feng
Format: Article
Language:English
Subjects:
Capacitance
Carbon nanotubes
Chemistry
doping
Electrochemical analysis
Electrons
Manganese dioxide
Nanocomposites
Nanosheets
Nanotubes
Nitrogen
Polypyrroles
Sodium sulfate
Supercapacitors
Tubes
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Summary:Nitrogen‐doped porous carbon nanotubes@MnO2 (N‐CNTs@MnO2) nanocomposites are prepared through the in situ growth of MnO2 nanosheets on N‐CNTs derived from polypyrrole nanotubes (PNTs). Benefiting from the synergistic effects between N‐CNTs (high conductivity and N doping level) and MnO2 nanosheets (high theoretical capacity), the as‐prepared N‐CNTs@MnO2‐800 nanocomposites show a specific capacitance of 219 F g−1 at a current density of 1.0 A g−1, which is higher than that of pure MnO2 nanosheets (128 F g−1) and PNTs (42 F g−1) in 0.5 m Na2SO4 solution. Meanwhile, the capacitance retention of 86.8 % (after 1000 cycles at 10 A g−1) indicates an excellent electrochemical performance of N‐CNTs@MnO2 prepared in this work. N‐CNTs@MnO2 nanocomposites have been successfully prepared by in situ growing MnO2 nanosheets on N‐doped carbon nanotubes (CNTs) derived from polypyrrole nanotubes. The as‐prepared nanocomposites showed good capacitance and cycling stability as supercapacitor electrode materials.
ISSN:1861-4728
1861-471X
DOI:10.1002/asia.201701752