期刊
SCIENTIFIC REPORTS
卷 4, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep04518
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 Returned Overseas Chinese Scholars [43]
- National Key Laboratory of Fundamental Science of Micro/Nano-device and System Technology [2013MS06]
- State Education Ministry and Fundamental Research Funds for Central Universities [CDJZR12248801, CDJZR12135501, CDJZR13130035]
- JGC-S Foundation
- Kurata Memorial Hitachi Science and Technology Foundation
- [24686069]
Fabricating hierarchical core-shell nanostructures is currently the subject of intensive research in the electrochemical field owing to the hopes it raises for making efficient electrodes for high-performance supercapacitors. Here, we develop a simple and cost-effective approach to prepare CuO@MnO2 core-shell nanostructures without any surfactants and report their applications as electrodes for supercapacitors. An asymmetric supercapacitor with CuO@MnO2 core-shell nanostructure as the positive electrode and activated microwave exfoliated graphite oxide (MEGO) as the negative electrode yields an energy density of 22.1 Wh kg(-1) and a maximum power density of 85.6 kW kg(-1); the device shows a long-term cycling stability which retains 101.5% of its initial capacitance even after 10000 cycles. Such a facile strategy to fabricate the hierarchical CuO@MnO2 core-shell nanostructure with significantly improved functionalities opens up a novel avenue to design electrode materials on demand for high-performance supercapacitor applications.
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