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Anionic P-substitution toward ternary Ni–S–P nanoparticles immobilized graphene with ultrahigh rate and long cycle life for hybrid supercapacitors

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Abstract

Designing and exploring earth-abundant but high-performance electrode materials are of crucial significance for the future large-scale development of supercapacitors. Herein, a facile anionic P-substitution strategy is used to in situ decorate ternary Ni–S–P nanoparticles on graphene nanosheets (G/Ni–S–P) for supercapacitors for the first time. Benefitting from the unique hierarchical structure and positive synergistic effects between each component, the resultant G/Ni–S–P composite delivers a spectacular specific capacity of 1406 C g−1 at 1 A g−1 with an outstanding rate capability of 60.2% at 120 A g−1, which is highly superior to those of the previously reported nickel based composites. The asymmetric supercapacitor assembled with the G/Ni–S–P and graphene/FeOOH composite as the cathode and anode exhibits high energy density up to 58.1 W h kg−1 and superb electrochemical stability with 4.9% decay after 30 000 continuous charge/discharge cycles. These intriguing electrochemical performances indicate that the G/Ni–S–P composite has enormous potential application in high-performance energy storage systems in the future.

Graphical abstract: Anionic P-substitution toward ternary Ni–S–P nanoparticles immobilized graphene with ultrahigh rate and long cycle life for hybrid supercapacitors

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Publication details

The article was received on 07 Sep 2019, accepted on 01 Oct 2019 and first published on 01 Oct 2019


Article type: Paper
DOI: 10.1039/C9TA09902F
J. Mater. Chem. A, 2019, Advance Article

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    Anionic P-substitution toward ternary Ni–S–P nanoparticles immobilized graphene with ultrahigh rate and long cycle life for hybrid supercapacitors

    B. Jiang, X. Ban, Q. Wang, K. Cheng, K. Zhu, K. Ye, G. Wang, D. Cao and J. Yan, J. Mater. Chem. A, 2019, Advance Article , DOI: 10.1039/C9TA09902F

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