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MOF-74 derived porous hybrid metal oxides hollow nanowires for high-performance electrochemical energy storage

Abstract

Metal-organic frameworks derived materials have attracted much attention due to their great potential applications in energy storage and conversion. Herein, we report a rational design and organic solvent-free synthesis of MOF-74 and their derived hybrid metal oxides nanowires with hollow structure. The evolution process and mechanism of MOF-74 have been investigated by adjusting solvent composition and Ni/Co ratios. Different phases of metal oxides nanowires can be tailored after calcinations, enabling the systematical investigation of different metal species counts on the electrochemical properties of hybrid metal oxide nanomaterials. Results indicate hybrid metal oxides exhibit obvious advantages compared with the monometallic oxides of Co3O4 and NiO, and NiO/NiCo2O4(1:1) with two mixed phases of NiCo2O4 and NiO exhibits the superior specific capacity of 732.0 C g-1 at a current density of 1 A g-1 among three different hybrid metal oxides. Furthermore, the assembled asymmetric supercapacitor device achieves a high specific energy density of 46.9 Wh kg-1 at the specific power density of 425.3 W kg-1 with excellent cycling performance. The as-prepared materials will be competitive and promising candidate for electrochemical energy storage and other applications.

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Publication details

The article was received on 10 Feb 2018, accepted on 26 Mar 2018 and first published on 27 Mar 2018


Article type: Paper
DOI: 10.1039/C8TA01426D
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    MOF-74 derived porous hybrid metal oxides hollow nanowires for high-performance electrochemical energy storage

    C. Yu, Y. Wang, J. Cui, D. Yu, X. zhang, X. Shu, J. Zhang, Y. Zhang, R. Vajtai, P. M. Ajayan and Y. Wu, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA01426D

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