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Issue 12, 2013
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Facile synthesis of mesoporous Ni0.3Co2.7O4 hierarchical structures for high-performance supercapacitors

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Abstract

In this work, we report the facile synthesis of mesoporous nickel cobalt oxide (Ni0.3Co2.7O4) hierarchical structures with excellent supercapacitive performance. Nickel cobalt oxalate hydrate (Ni0.1Co0.9C2O4·nH2O) is first synthesized as the precursor via a facile precipitation method, followed by controlled annealing to obtain mesoporous Ni0.3Co2.7O4 hierarchical structures. The sample prepared at a relatively low annealing temperature (400 °C) possesses more abundant mesopores and higher specific surface area, and exhibits excellent supercapacitive performance in aqueous alkaline electrolytes. An exceptionally high specific capacitance of 960 and 805 F g−1 is obtained under current densities of 0.625 and 6.25 A g−1, respectively, with excellent cyclic stability. The remarkable electrochemical performance is attributed to the desirable composition and the unique hierarchical mesoporous architectures.

Graphical abstract: Facile synthesis of mesoporous Ni0.3Co2.7O4 hierarchical structures for high-performance supercapacitors

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Publication details

The article was received on 23 Jun 2013, accepted on 08 Aug 2013 and first published on 08 Aug 2013


Article type: Paper
DOI: 10.1039/C3EE42101E
Citation: Energy Environ. Sci., 2013,6, 3619-3626
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    Facile synthesis of mesoporous Ni0.3Co2.7O4 hierarchical structures for high-performance supercapacitors

    H. B. Wu, H. Pang and X. W. (. Lou, Energy Environ. Sci., 2013, 6, 3619
    DOI: 10.1039/C3EE42101E

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