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Issue 11, 2018
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NiCo2O4 nanosheets grown on interconnected honeycomb-like porous biomass carbon for high performance asymmetric supercapacitors

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Abstract

In this paper, NiCo2O4 nanosheets grown on interconnected honeycomb-like porous biomass carbon (HLPBC) have been successfully fabricated by carbonization combined with a facile hydrothermal process. Benefiting from the unique structure and reasonable pore size/pore size distribution, the as-obtained composite (HLPBC (0.1 g)/NiCo2O4) exhibits satisfactory capacitive behavior (1137.5 F g−1 at a current density of 5 A g−1) and an excellent cycling stability of 90.3% capacitance retention over continuous 5000 cycles. The HLPBC served as a scaffold to support the NiCo2O4 nanosheets. At the same time, it provides a pathway for transporting electrons with high speed. An asymmetric supercapacitor is fabricated using HLPBC/NiCo2O4 and activated carbon (AC) as positive and negative electrodes, respectively. The asymmetric supercapacitor can deliver a high energy density of 30.75 W h kg−1 at a power density of 900 W kg−1. These results suggest that HLPBC/NiCo2O4 can be a potential candidate for electrochemical energy storage devices.

Graphical abstract: NiCo2O4 nanosheets grown on interconnected honeycomb-like porous biomass carbon for high performance asymmetric supercapacitors

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Publication details

The article was received on 30 Jan 2018, accepted on 11 Mar 2018 and first published on 12 Mar 2018


Article type: Paper
DOI: 10.1039/C8NJ00515J
Citation: New J. Chem., 2018,42, 8478-8484
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    NiCo2O4 nanosheets grown on interconnected honeycomb-like porous biomass carbon for high performance asymmetric supercapacitors

    D. Guo, L. Zhang, X. Song, L. Tan, H. Ma, J. Jiao, D. Zhu and F. Li, New J. Chem., 2018, 42, 8478
    DOI: 10.1039/C8NJ00515J

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