Carbon decorated dendritic nickel sulfide coordinating with situ growth enabling hybrid supercapacitors with high specific energy and rate performance

•Dendritic-like Ni3S2 decorated by carbon is prepared by an in-situ strategy.•The unique Ni3S2 structures are fabricated using Ni foam as Ni source.•NF/Ni3S2/C//AC HSC delivers an energy density of 62.5 Wh kg−1 at a power density of 241.5 W kg−1.•Capacitance retention of NF/Ni3S2/C//AC HSC electrode...

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Bibliographic Details
Published in:Journal of alloys and compounds 2021-12, Vol.884, p.161160, Article 161160
Main Authors: Wei, Jinhe, Han, Dandan, Pan, Yifan, Gao, Dongyan, Mao, Liucheng, Wei, Yen
Format: Article
Language:English
Subjects:
Activated carbon
Carbon
Carbon decorated
Decoration
Dendritic superstructure
Diameters
Electrodes
Energy storage
Hybrid supercapacitor
Metal foams
Nanospheres
Nickel
Nickel sulfide
Specific energy
Supercapacitors
Superstructures
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Summary:•Dendritic-like Ni3S2 decorated by carbon is prepared by an in-situ strategy.•The unique Ni3S2 structures are fabricated using Ni foam as Ni source.•NF/Ni3S2/C//AC HSC delivers an energy density of 62.5 Wh kg−1 at a power density of 241.5 W kg−1.•Capacitance retention of NF/Ni3S2/C//AC HSC electrode after 10,000 charge- discharge cycles is 83.7%. Three-dimensional (3D) carbon nanospheres and two-dimensional (2D) carbon layer co-decorated dendritic nickel sulfide (Ni3S2) is fabricated on a nickel foam via a two-step hydrothermal process. The carbon nanospheres with the diameters ranging from 150 to 200 nm embellished on the “treetop” and the carbon layer coated uniformly on the “trunk”, which enhance the capacitive performance of the composite electrode. Herein, the amorphous carbon can further provide more efficient electron conduction path for the electrodes. With its unique superstructure, the as-fabricated carbon decorated Ni3S2 electrode exhibits a high specific capacity of 297.2 mAh g−1 at 5 mA cm−2, remarkable cycling stability (84.1% of the initial capacity) for 10,000 cycles at 10 mA cm−1. The hybrid supercapacitor fabricates by carbon decorated Ni3S2 and active carbon, which achieves a high specific energy of 62.5 Wh kg−1 at a specific power of 241.5 W kg−1. The encouraging results of the electrode make it as a potential candidate for energy storage.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2021.161160