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Issue 12, 2017
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Flexible, sandwich-like CNTs/NiCo2O4 hybrid paper electrodes for all-solid state supercapacitors

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Abstract

With the increasing demand for compact storage systems for portable and wearable electronic devices, flexible supercapacitors with high volumetric performance have attracted considerable attention. Here, we report a simple method to fabricate a sandwich-like carbon nanotubes (CNTs)/NiCo2O4 hybrid paper electrode, consisting of a layer of conductive CNT buckypaper coated with honeycomb-like NiCo2O4 nanosheets at both sides. Owing to the high conductivity of the CNT skeleton and vertically aligned structure of NiCo2O4 nanosheets, the free-standing hybrid paper possesses an ultra-high specific capacitance of 1752.3 F g−1 and excellent cycling performance. A flexible all-solid-state symmetrical supercapacitor has been further assembled based on the hybrid paper. The device exhibits excellent volumetric energy and power densities (1.17 mW h cm−3 and 2430 mW cm−3) and deformability, even under bending at an angle of 180°. The hybrid paper can serve as a freestanding and flexible electrode for various energy devices.

Graphical abstract: Flexible, sandwich-like CNTs/NiCo2O4 hybrid paper electrodes for all-solid state supercapacitors

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Publication details

The article was received on 15 Jan 2017, accepted on 20 Feb 2017 and first published on 21 Feb 2017


Article type: Paper
DOI: 10.1039/C7TA00491E
Citation: J. Mater. Chem. A, 2017,5, 5886-5894
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    Flexible, sandwich-like CNTs/NiCo2O4 hybrid paper electrodes for all-solid state supercapacitors

    Y. Zheng, Z. Lin, W. Chen, B. Liang, H. Du, R. Yang, X. He, Z. Tang and X. Gui, J. Mater. Chem. A, 2017, 5, 5886
    DOI: 10.1039/C7TA00491E

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