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One-Step and Morphology-Controlled Synthesis of Ni-Co Binary Hydroxide on Nickel Foam for High-Performance Supercapacitors

Department of Microsystems, Faculty of Technology, Natural Sciences and Maritime Sciences, University of South-Eastern Norway, Campus Vestfold, Raveien 215, 3184 Borre, Norway
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Appl. Sci. 2020, 10(11), 3814; https://doi.org/10.3390/app10113814
Received: 11 April 2020 / Revised: 21 May 2020 / Accepted: 29 May 2020 / Published: 30 May 2020
(This article belongs to the Section Energy)
Ni-Co binary hydroxide grown on nickel foam was synthesized through a facile one-step process for pseudocapacitive electrode application. The morphology of the fabricated binary hydroxide, evolving from nanosheet to nanowire, was highly controllable by tuning the Ni:Co ratio. In systematical electrochemical measurements, the prepared binary material on nickel foam could be employed as a binder-free working electrode directly. The optimal composition obtained at the Ni:Co ratio of 5:5 in integrated nanosheet/nanowire geometry exhibited high specific capacitances of 2807 and 2222 F/g at current densities of 1 and 20 A/g, equivalent to excellent rate capability. The capacitance loss was 19.8% after 2000 cycles, demonstrating good long-term cyclic stability. The outstanding supercapacitors behaviors benefited from unique structure and synergistic contributions, indicating the great potential of the obtained binary hydroxide electrode for high-performance energy storage devices. View Full-Text
Keywords: Ni-Co binary hydroxide; one-step; controllable morphology; binder-free; supercapacitors; synergistic contributions Ni-Co binary hydroxide; one-step; controllable morphology; binder-free; supercapacitors; synergistic contributions
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MDPI and ACS Style

Fan, X.; Ohlckers, P.; Chen, X. One-Step and Morphology-Controlled Synthesis of Ni-Co Binary Hydroxide on Nickel Foam for High-Performance Supercapacitors. Appl. Sci. 2020, 10, 3814. https://doi.org/10.3390/app10113814

AMA Style

Fan X, Ohlckers P, Chen X. One-Step and Morphology-Controlled Synthesis of Ni-Co Binary Hydroxide on Nickel Foam for High-Performance Supercapacitors. Applied Sciences. 2020; 10(11):3814. https://doi.org/10.3390/app10113814

Chicago/Turabian Style

Fan, Xiao; Ohlckers, Per; Chen, Xuyuan. 2020. "One-Step and Morphology-Controlled Synthesis of Ni-Co Binary Hydroxide on Nickel Foam for High-Performance Supercapacitors" Appl. Sci. 10, no. 11: 3814. https://doi.org/10.3390/app10113814

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