Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/102940
Title: Three-dimensional Co3O4@MnO2 hierarchical nanoneedle arrays : morphology control and electrochemical energy storage
Authors: Kong, Dezhi
Luo, Jingshan
Wang, Yanlong
Ren, Weina
Yu, Ting
Luo, Yongsong
Yang, Yaping
Cheng, Chuanwei
Keywords: DRNTU::Engineering::Materials::Energy materials
Issue Date: 2014
Source: Kong, D., Luo, J., Wang, Y., Ren, W., Yu, T., Luo, Y., et al. (2014). Three-dimensional Co3O4@MnO2 hierarchical nanoneedle arrays : morphology control and electrochemical energy storage. Advanced Functional Materials, in press.
Series/Report no.: Advanced functional materials
Abstract: In this paper, a highly ordered three-dimensional Co3O4@MnO2 hierarchical porous nanoneedle array on nickel foam is fabricated by a facile, stepwise hydrothermal approach. The morphologies evolution of Co3O4 and Co3O4@MnO2 nanostructures upon reaction times and growth temperature are investigated in detail. Moreover, the as-prepared Co3O4@MnO2 hierarchical structures are investigated as anodes for both supercapacitors and Li-ion batteries. When used for supercapacitors, excellent electrochemical performances such as high specific capacitances of 932.8 F g−1 at a scan rate of 10 mV s−1 and 1693.2 F g−1 at a current density of 1 A g−1 as well as long-term cycling stability and high energy density (66.2 W h kg−1 at a power density of 0.25 kW kg−1), which are better than that of the individual component of Co3O4 nanoneedles and MnO2 nanosheets, are obtained. The Co3O4@MnO2 NAs are also tested as anode material for LIBs for the first time, which presents an improved performance with high reversible capacity of 1060 mA h g−1 at a rate of 120 mA g−1, good cycling stability, and rate capability.
URI: https://hdl.handle.net/10356/102940
http://hdl.handle.net/10220/19214
ISSN: 1616-301X
DOI: 10.1002/adfm.201304206
Rights: © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SPMS Journal Articles

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