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Hierarchical Nickel/Phosphorus/Nitrogen/Carbon Composites Templated by One Metal-Organic Framework as Highly-Efficient Supercapacitor Electrode Materials

Abstract

By utilizing the proper template of Metal-Organic Frameworks ( MOFs ) for fabricating high performance supercapacitor electrodes have been emerging a great attention. But rare attention has been paid onto how to prepare the excellent MOF template for deriving the anticipated electrode materials. Herein, one two-fold interpenetrating MOF, had been successfully constructed, along with microporous structure and multi-components as nickel, phosphorus, nitrogen, oxygen and carbon in the final framework. The pristine sample could be directly utilized as supercapacitor electrode materials, which exhibits the moderate electrochemical capacitance of 979.8 F g−1 at a current density of 1 A g−1. By the simple treatment of one-step pyrolysis in the nitrogen atmosphere at different annealing temperature ( 500°C, 600°C, 700°C, 800°C ), rare hierarchical Ni/P/N/C composites, denoted as Ni/P/N/C-500, Ni/P/N/C-600, Ni/P/N/C-700, Ni/P/N/C-800, have been derived from the parent MOF. The anticipated multi-components of Ni, P, N and O have been uniformly incorporated into carbon materials, which would result in excellent synergistic effect to improve the performance of electrochemical energy storage. The morphologies and components of these derivatives have been characterized via SEM, XPS and XRD, indicating the uniform distribution of different components in the hybrid structures. The maximum specific capacitance of Ni/P/N/C-500 electrode could reach at 2887.87 F g−1 at a current density of 1 A g−1, superior to the other hierarchical composites and setting up a new benchmark in the related field. The combination of several advantages in these derivatives, such as a high surface area, even distribution and ultrahigh content of Ni/P/N/C components, ensure their high-performances in energy storage. The presented results fully demonstrate the unique advantage of utilizing the pre-designed MOFs as a template to prepare the hybrid materials used as the potential electrode-active materials in supercapacitors, and provide an efficient route to fabricate the superior performance energy storage devices.

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Publication details

The article was received on 01 Dec 2018, accepted on 29 Dec 2018 and first published on 31 Dec 2018


Article type: Paper
DOI: 10.1039/C8TA11568K
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Hierarchical Nickel/Phosphorus/Nitrogen/Carbon Composites Templated by One Metal-Organic Framework as Highly-Efficient Supercapacitor Electrode Materials

    F. Yu, X. xiong, L. zhou, J. Li, J. Liang, S. Hu, W. Lu, B. Li and H. Zhou, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA11568K

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