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Flower-like NiCo2S4/rGO composites directly grown on Ni foam as highly efficient electrode for long cycling stability supercapacitor

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Title Flower-like NiCo2S4/rGO composites directly grown on Ni foam as highly efficient electrode for long cycling stability supercapacitor
 
Creator Zhao, Yongfu
Han, Shuaijun
Liu, Hui
 
Subject Flower-like composite
RGO
NiCo2S4/rGO composite
Asymmetric supercapacitor
 
Description 782-790
NiCo2S4 and reduced graphene oxide(rGO) have been directly grown on Ni foam by a two-step hydrothermal method to
form NiCo2S4/rGO composite material with hierarchical structures. The resulting samples display flower-like NiCo2S4
particles formed by interconnected NiCo2S4 nanosheets with the conductive rGO sheets interspersing among them. This
unique structure can provide a much rougher surface, rich two-phase interface, and porous channels exposed to electrolytes
with fast ion diffusions and electron transmissions, as well as effectively relieve the expansion/contractions during charging
and discharging. The electrochemical test results show that NiCo2S4/rGO composite prepared at 120℃ with 8.1 mg mass
loading on Ni foam exhibits a specific capacitance (1974.7 Fꞏg–1) at a current density of 10 mAꞏcm–2. An asymmetric
supercapacitor device assembled by NiCo2S4/rGO and activated carbon can provide an energy density high up to
46.8 Whꞏkg–1 at a power density of 219.5 Wꞏkg–1. Even if the power density is increased up to 731.6 W kg–1, it still can
achieve the energy density superior to 31.8 Wh kg–1. Moreover, the asymmetric supercapacitor device exhibits an
outstanding cycling stability with 87.8% capacitance retention after 5000 cycles, which confirms its potential application in
the energy storage.
 
Date 2024-08-21T05:24:02Z
2024-08-21T05:24:02Z
2024-08
 
Type Article
 
Identifier 2583-1321 (Online); 0019-5103 (Print)
http://nopr.niscpr.res.in/handle/123456789/64418
https://doi.org/10.56042/ijc.v63i8.8566
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJC Vol.63(08) [August 2024]