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Issue 21, 2014
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3D mesoporous hybrid NiCo2O4@graphene nanoarchitectures as electrode materials for supercapacitors with enhanced performances

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Abstract

3D mesoporous hybrid NiCo2O4@graphene nanoarchitectures were successfully synthesized by a combination of freeze drying and hydrothermal reaction. Field-emission scanning electron microscopy (FESEM) and TEM analyses revealed that the NiCo2O4@graphene nanostructures consist of a hierarchical mesoporous sheet-on-sheet nanoarchitecture with a high specific surface area of 194 m2 g−1. Ultrathin NiCo2O4 nanosheets, with a thickness of a few nanometers and mesopores ranging from 2 to 5 nm, were wrapped in graphene nanosheets and hybrid nanoarchitectures were formed. When applied as electrode materials in supercapacitors, the hybrid NiCo2O4@graphene nanosheets exhibited a high capacitance of 778 F g−1 at a current density of 1 A g−1, and an excellent cycling performance extending to 10 000 cycles at a high current density of 10 A g−1.

Graphical abstract: 3D mesoporous hybrid NiCo2O4@graphene nanoarchitectures as electrode materials for supercapacitors with enhanced performances

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Publication details

The article was received on 30 Dec 2013, accepted on 02 Mar 2014 and first published on 04 Mar 2014


Article type: Paper
DOI: 10.1039/C3TA15423H
Author version available: Download Author version (PDF)
Citation: J. Mater. Chem. A, 2014,2, 8103-8109
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    3D mesoporous hybrid NiCo2O4@graphene nanoarchitectures as electrode materials for supercapacitors with enhanced performances

    Y. Wei, S. Chen, D. Su, B. Sun, J. Zhu and G. Wang, J. Mater. Chem. A, 2014, 2, 8103
    DOI: 10.1039/C3TA15423H

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