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Issue 39, 2018
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Core-branched CoSe2/Ni0.85Se nanotube arrays on Ni foam with remarkable electrochemical performance for hybrid supercapacitors

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Abstract

Nanotube arrays have shown great potential in a variety of important applications, such as hybrid supercapacitors. In order to endow nanotubes with multifunctionality, rationally designed and fabricated nanotube arrays with controllable structures are highly desired, but still remain a great challenge. Herein, we report a facile synthesis strategy for core-branched CoSe2/Ni0.85Se nanotube arrays directly on Ni foam by simply selenizing Co-precursor nanowires for hybrid supercapacitors. This structure design could not only ensure the intimate contact of self-branched heterostructures, but also offer sufficient active sites for electrochemical reactions. Further, we propose an electrochemical activation strategy to fully boost the electrochemical performance of CoSe2/Ni0.85Se nanotube arrays. After electrochemical activation, CoSe2/Ni0.85Se nanotube arrays have been changed into porous CoOOH/NiOOH, accounting for the remarkable performance. Contributed to by short ion diffusion paths, large electroactive sites and low contact resistance, the CoSe2/Ni0.85Se electrode after electrochemical activation shows remarkable performance for hybrid supercapacitors.

Graphical abstract: Core-branched CoSe2/Ni0.85Se nanotube arrays on Ni foam with remarkable electrochemical performance for hybrid supercapacitors

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Publication details

The article was received on 25 Aug 2018, accepted on 19 Sep 2018 and first published on 20 Sep 2018


Article type: Paper
DOI: 10.1039/C8TA08263D
Citation: J. Mater. Chem. A, 2018,6, 19151-19158

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    Core-branched CoSe2/Ni0.85Se nanotube arrays on Ni foam with remarkable electrochemical performance for hybrid supercapacitors

    J. Lin, H. Wang, Y. Yan, X. Zheng, H. Jia, J. Qi, J. Cao, J. Tu, W. Fei and J. Feng, J. Mater. Chem. A, 2018, 6, 19151
    DOI: 10.1039/C8TA08263D

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