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Issue 2, 2019
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Uniform P doped Co–Ni–S nanostructures for asymmetric supercapacitors with ultra-high energy densities

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Abstract

Uniform P doped Co–Ni–S nanosheet arrays were directly grown on Ni foams by an efficient and cost-effective process. The binder-free electrode of P doped Co–Ni–S nanosheet arrays possesses an ultra-high specific capacitance of ∼3677 F g−1 at 1 A g−1 with an excellent rate capability (∼63% capacitance retention at 20 A g−1) and considerable cycling performance (∼84% capacitance retention after 10 000 cycles). Correspondingly, the asymmetric supercapacitors assembled with P doped Co–Ni–S as the positive electrode and AC as the negative electrode display an ultra-high energy density of ∼68.7 W h kg−1 at a power density of ∼0.8 kW kg−1. In view of these features, this work provides a simple and scalable strategy for designing electrodes and devices with superior electrochemical performance in next generation energy storage applications.

Graphical abstract: Uniform P doped Co–Ni–S nanostructures for asymmetric supercapacitors with ultra-high energy densities

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Publication details

The article was received on 13 Sep 2018, accepted on 22 Nov 2018 and first published on 23 Nov 2018


Article type: Paper
DOI: 10.1039/C8NR07454B
Nanoscale, 2019,11, 688-697

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    Uniform P doped Co–Ni–S nanostructures for asymmetric supercapacitors with ultra-high energy densities

    Y. Meng, P. Sun, W. He, B. Teng and X. Xu, Nanoscale, 2019, 11, 688
    DOI: 10.1039/C8NR07454B

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