Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/96509
Title: High-quality metal oxide core/shell nanowire arrays on conductive substrates for electrochemical energy storage
Authors: Xia, Xinhui
Tu, Jiangping
Zhang, Yongqi
Wang, Xiuli
Gu, Changdong
Zhao, Xin-bing
Fan, Hong Jin
Issue Date: 2012
Source: Xia, X., Tu, J., Zhang, Y., Wang, X., Gu, C., Zhao, X.-b., et al. (2012). High-Quality Metal Oxide Core/Shell Nanowire Arrays on Conductive Substrates for Electrochemical Energy Storage. ACS Nano, 6(6), 5531-5538.
Series/Report no.: ACS nano
Abstract: The high performance of a pseudocapacitor electrode relies largely on a scrupulous design of nanoarchitectures and smart hybridization of bespoke active materials. We present a powerful two-step solution-based method for the fabrication of transition metal oxide core/shell nanostructure arrays on various conductive substrates. Demonstrated examples include Co3O4 or ZnO nanowire core and NiO nanoflake shells with a hierarchical and porous morphology. The “oriented attachment” and “self-assembly” crystal growth mechanisms are proposed to explain the formation of the NiO nanoflake shell. Supercapacitor electrodes based on the Co3O4/NiO nanowire arrays on 3D macroporous nickel foam are thoroughly characterized. The electrodes exhibit a high specific capacitance of 853 F/g at 2 A/g after 6000 cycles and an excellent cycling stability, owing to the unique porous core/shell nanowire array architecture, and a rational combination of two electrochemically active materials. Our growth approach offers a new technique for the design and synthesis of transition metal oxide or hydroxide hierarchical nanoarrays that are promising for electrochemical energy storage, catalysis, and gas sensing applications.
URI: https://hdl.handle.net/10356/96509
http://hdl.handle.net/10220/10315
ISSN: 1936-0851
DOI: 10.1021/nn301454q
Rights: © 2012 American Chemical Society.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SPMS Journal Articles

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