In Situ Growth of MnO2 Nanosheets on N‐Doped Carbon Nanotubes Derived from Polypyrrole Tubes for Supercapacitors |
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| Authors: | Xu Ou Qi Li Dr Dan Xu Dr Jiangna Guo Prof Feng Yan |
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| Institution: | State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, Department of Polymer Science and Engineering, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, China |
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| Abstract: | 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. |
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| Keywords: | capacitance doping nanosheets nanotubes supercapacitors |
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