Effect of surfactant on the electrochemical performance of graphene/iron oxide electrode for supercapacitor

Ghasemi, Shahram; Ahmadi, Fatemeh

doi:10.1016/j.jpowsour.2015.04.159

Cited by 91 publications

(48 citation statements)

References 71 publications

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“…The observance of only 3% capacitance loss after 5000 GCD cycles for the as-assembled HSC device suggests that our HSC possesses excellent long-termc ycling stabilitya nd is very promising for practical applications.T he SEM images of the positive-electrode materiala fter 5000 cycles ( Figure S10) demonstrate that the 3D conductive nanostructure is wellp reserved. (6) and (7)]: [38] E ¼ 0:5 CV 2 ð6Þ [37] The energy density and power density were also obtained to evaluatef urthert he electrochemical performance of our HSC device [Eqs.…”

Section: Resultsmentioning

confidence: 99%

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Cobalt Doping To Boost the Electrochemical Properties of Ni@Ni₃S₂ Nanowire Films for High‐Performance Supercapacitors

Wang

et al. 2017

ChemSusChem

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Metal sulfides have aroused great interest for energy storage. However, their low specific capacities and inferior rate capabilities hinder their practical applications. In this work, a facile cobalt-doping process is used to boost the electrochemical performance of Ni@Ni S core-sheath nanowire film electrodes for high-performance electrochemical energy storage. Co ions are doped successfully and uniformly into Ni S nanosheets through a facile ion-exchange process. The electrochemical properties of film electrodes are improved greatly, and an ultrahigh volumetric capacity (increased from 105 to 730 C cm at 0.25 A cm ) and excellent rate capability are obtained after Co is doped into Ni@Ni S core-sheath nanowires. A hybrid asymmetric supercapacitor with Co-doped Ni@Ni S as the positive electrode and graphene-carbon nanotubes as the negative electrode is assembled and exhibits an ultrahigh volumetric capacitance of 142 F cm (based on the total volume of both electrodes) at 0.5 A cm and excellent cycling stability (only 3 % capacitance decrease after 5000 cycles). Moreover, the volumetric energy density can reach 44.5 mWh cm , which is much larger than those of thin-film lithium batteries (1-10 mWh cm ). These results may provide useful insights for the fabrication of high-performance film electrodes for energy-storage applications.

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Section: Resultsmentioning

confidence: 99%

“…[6][7][8] Generally,H SCs are composed of ab attery-type electrode as the energy source and ac apacitor-type electrode as the power source. [6][7][8] Generally,H SCs are composed of ab attery-type electrode as the energy source and ac apacitor-type electrode as the power source.…”

Section: Introductionmentioning

confidence: 99%

Cobalt Doping To Boost the Electrochemical Properties of Ni@Ni₃S₂ Nanowire Films for High‐Performance Supercapacitors

Wang

et al. 2017

ChemSusChem

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“…Nevertheless, the residual oxygenated groups of rGO sheets do not deprive completely rGO of the unique electrical and mechanical properties of graphenes [36][37]. As a consequence this material can be used for device applications, preparation of graphene-based composites [38][39][40][41][42], thin films and paper like materials [43].…”

Section: Introductionmentioning

confidence: 99%

Effect of hydrothermal reaction time and alkaline conditions on the electrochemical properties of reduced graphene oxide

Vermisoglou

Giannakopoulou

Romanos

et al. 2015

Applied Surface Science

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“…However, supercapacitor properties of rGO/h‐BN and transition metal composite have not been evaluated previously. There are several reports on the rGO/transition metal oxide composite supercapacitor electrodes . Charge storage capacity and stability of the metal oxide/rGO composites are superior in comparison to the bare metal oxide electrode due to the presence of EDLC mechanism.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Chemi‐adsorption, EDLC, and Redox Capacitance Through Electro‐precipitation Synthesis of Fe₃O₄/NiO@rGO/h‐BN for the Development of Hybrid Supercapacitor

et al. 2019

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3D Fe3O4/NiO was grafted on to the 2D rGO/h‐BN by electro‐precipitation method. Nitrogen of h‐BN moiety and oxygen functional groups of rGO played the role of negative active site to trap the metallic cations. Electrochemical charge storage mechanism was optimized by controlling the stoichiometry and defect contents of Fe3O4/NiO@rGO/h‐BN. Stoichiometry of the electro‐precipitated samples was tailored in presence of negative active sites of rGO/h‐BN and applied D.C. bias of the electrochemical bath. In addition, the nucleation and growth of metal oxides were influenced by the stacking and vacancy defects of rGO/h‐BN sheets. High specific capacitance (1328 F g−1) of Fe3O4/NiO@rGO/h‐BN was attributed to the synergistic effect of electrochemical double layer capacitance of rGO, chemi‐adsorption of –OH ions on Lewis acid (boron of h‐BN moiety) and redox capacitance of Fe3O4/NiO in alkaline medium. In addition, the presence of pyrrolic defect at the rGO/h‐BN stacking region acted as the nucleation site and provided additional redox capacitance by shifting the Fermi level towards the valance band. An asymmetric supercapacitor (ASC) was constructed using Fe3O4/NiO@rGO/h‐BN and thermally reduced GO as positive and negative electrode, respectively. ASC showed high energy (82 W h Kg−1) and power density (5600 W Kg−1) along with low relaxation time constant (2.2 ms) and high stability (79%) after 10,000 charge discharge cycles.

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Effect of surfactant on the electrochemical performance of graphene/iron oxide electrode for supercapacitor

Cited by 91 publications

References 71 publications

Cobalt Doping To Boost the Electrochemical Properties of Ni@Ni₃S₂ Nanowire Films for High‐Performance Supercapacitors

Cobalt Doping To Boost the Electrochemical Properties of Ni@Ni₃S₂ Nanowire Films for High‐Performance Supercapacitors

Effect of hydrothermal reaction time and alkaline conditions on the electrochemical properties of reduced graphene oxide

Optimization of Chemi‐adsorption, EDLC, and Redox Capacitance Through Electro‐precipitation Synthesis of Fe₃O₄/NiO@rGO/h‐BN for the Development of Hybrid Supercapacitor

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Effect of surfactant on the electrochemical performance of graphene/iron oxide electrode for supercapacitor

Cited by 91 publications

References 71 publications

Cobalt Doping To Boost the Electrochemical Properties of Ni@Ni3S2 Nanowire Films for High‐Performance Supercapacitors

Cobalt Doping To Boost the Electrochemical Properties of Ni@Ni3S2 Nanowire Films for High‐Performance Supercapacitors

Effect of hydrothermal reaction time and alkaline conditions on the electrochemical properties of reduced graphene oxide

Optimization of Chemi‐adsorption, EDLC, and Redox Capacitance Through Electro‐precipitation Synthesis of Fe3O4/NiO@rGO/h‐BN for the Development of Hybrid Supercapacitor

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Cobalt Doping To Boost the Electrochemical Properties of Ni@Ni₃S₂ Nanowire Films for High‐Performance Supercapacitors

Cobalt Doping To Boost the Electrochemical Properties of Ni@Ni₃S₂ Nanowire Films for High‐Performance Supercapacitors

Optimization of Chemi‐adsorption, EDLC, and Redox Capacitance Through Electro‐precipitation Synthesis of Fe₃O₄/NiO@rGO/h‐BN for the Development of Hybrid Supercapacitor