期刊
SCIENTIFIC REPORTS
卷 4, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep03878
关键词
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资金
- National Natural Science Foundation of China [51104194]
- Doctoral Fund of Ministry of Education of China [20110191120014]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars [43]
- National Key laboratory of Fundamental Science of Micro/Nano-device and System Technology [2013MS06]
- Fundamental Research Funds for the Central Universities [CDJZR12248801, CDJZR12135501, CDJZR13130035]
- State Education Ministry
Porous nanotubes comprised of MnO2 nanosheets were fabricated with a one-pot hydrothermal method using polycarbonate membrane as the template. The diameter and thickness of nanotubes can be controlled by choice of the membrane pore size and the chemistry. The porous MnO2 nanotubes were used as a supercapacitor electrode. The specific capacitance in a three-electrode system was 365 F g(-1) at a current density of 0.25 A g(-1) with capacitance retention of 90.4% after 3000 cycles. An asymmetric supercapacitor with porous MnO2 nanotubes as the positive electrode and activated graphene as the negative electrode yielded an energy density of 22.5 Wh kg(-1) and a maximum power density of 146.2 kW kg(-1); these values exceeded those reported for other MnO2 nanostructures. The supercapacitor performance was correlated with the hierarchical structure of the porous MnO2 nanotubes.
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