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Issue 23, 2018
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Fabrication of hollow nanorod electrodes based on RuO2//Fe2O3 for an asymmetric supercapacitor

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Abstract

In this work, hollow RuO2 nanotube arrays were successfully grown on carbon cloth by using a facile two-step method to fabricate a binder-free electrode. The well-aligned electrode displays excellent electrochemical performance. By using RuO2 hollow nanotube arrays as the positive electrode and Fe2O3 as the negative electrode, a flexible solid-state asymmetric supercapacitor (ASC) has been fabricated which exhibited excellent electrochemical performance, such as a high capacitance of 4.9 F cm−3, a high energy density of 1.5 mW h cm−3 and a high power density of 9.1 mW cm−3. In addition, the two-electrode SC shows high cycling stability with 97% capacitance retention after 5000 charge–discharge cycles. These excellent electrochemical performances are ascribed to the unique hollow structural design of electrodes, which can shorten the ion diffusion length, provide a fast ion transport channel, and offer a large electrode/electrolyte interface for the charge-transfer reaction. The structural design and the synthesis approach are general and can be extended to synthesizing a broad range of materials systems.

Graphical abstract: Fabrication of hollow nanorod electrodes based on RuO2//Fe2O3 for an asymmetric supercapacitor

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Publication details

The article was received on 25 Feb 2018, accepted on 10 May 2018 and first published on 12 May 2018


Article type: Paper
DOI: 10.1039/C8DT00740C
Citation: Dalton Trans., 2018,47, 7747-7753
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    Fabrication of hollow nanorod electrodes based on RuO2//Fe2O3 for an asymmetric supercapacitor

    Q. Wang, X. Liang, Y. Ma and D. Zhang, Dalton Trans., 2018, 47, 7747
    DOI: 10.1039/C8DT00740C

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