期刊
SCIENTIFIC REPORTS
卷 3, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep02193
关键词
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资金
- National Basic Research Program of China [2013CB922102, 2011CB935800]
- National Natural Science Foundation of China [21071076, 21021062, 51172106]
Conventional crystalline beta-MnO2 usually exhibits poor electrochemical activities due to the narrow tunnels in its rutile-type structure. In this study, we synthesized a novel 2D beta-MnO2 network with long-range order assembled by beta-MnO2 nanowires and demonstrated that the novel 2D beta-MnO2 network exhibits enhanced electrochemical performances. The 2D network is interwoven by crossed uniform beta-MnO2 nanowires and the angle between the adjacent nanowires is about 606. Such a novel structure makes efficient contact of beta-MnO2 with electrolyte during the electrochemical process, decreases the polarization of the electrode and thus increases the discharge capacity and high-rate capability. The specific capacitance of the obtained 2D beta-MnO2 network is 453.0 F/g at a current density of 0.5 A/g.
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