Core-shell structured ZnCo2O4@ZnWO4 nanowire arrays on nickel foam for advanced asymmetric supercapacitors

Xie, Li; Liu, Yu; Bai, Hongye; Li, Chunxiang; Mao, Baodong; Sun, Lin; Shi, Weidong

doi:10.1016/j.jcis.2018.07.049

Cited by 77 publications

(29 citation statements)

References 54 publications

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“…15 (ii) A combination of bimetallic oxides can synthesize better structures; however, it does not optimize conductivity. 16 Mai et al fabricated MnMoO 4 /CoMoO 4 heterostructured nanowires via a simple refluxing strategy, which showed only 187.1 F g −1 at 1 A g −1 . 17 (iii) Au cladding is favorable to improve electrical conductivity but is more costly.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the mixture of a polymer binder with active materials will lead to an increase in the dead area, which can suppress the migration of electron and ions . (ii) A combination of bimetallic oxides can synthesize better structures; however, it does not optimize conductivity . Mai et al fabricated MnMoO 4 /CoMoO 4 heterostructured nanowires via a simple refluxing strategy, which showed only 187.1 F g –1 at 1 A g –1 .…”

Section: Introductionmentioning

confidence: 99%

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Interfacial Engineering in Crystalline Cobalt Tungstate/Amorphous Cobalt Boride Heterogeneous Nanostructures for Enhanced Electrochemical Performances

Hou

Gao

Kong

2020

ACS Appl. Energy Mater.

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Interfacial engineering is one of the feasible pathways to tune the characteristics and functions of nanomaterials. In this report, we successfully synthesized crystalline CoWO 4 /amorphous Co−B heterostructures that enable superior electrochemical performance. The electrodes overcome the defect of low conductivity of cobalt tungstate and also expose more active sites. The optimized CoWO 4 /Co−B electrode has a remarkable specific capacity of 177.4 C g −1 at 0.5 A g −1 and a great specific capacity retention of 100% at 5 A g −1 after 10,000 cycles with reasonable cycling stability. Moreover, the Co−B/CoWo 4 electrode and activated carbon electrode are combined to assemble an asymmetric supercapacitor, which achieves 22.26 W h kg −1 maximum energy density at 200 W kg −1 and a capacity retention of 95.65% after 10,000 cycles at 2 A g −1 . In general, the work shows the unique characteristics of the crystalline/amorphous nanoheterostructure and provides a direction for future studies on increasing the electrochemical character and application of nanomaterials through regulating the interface contact of composites.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Interfacial Engineering in Crystalline Cobalt Tungstate/Amorphous Cobalt Boride Heterogeneous Nanostructures for Enhanced Electrochemical Performances

Hou

Gao

Kong

2020

ACS Appl. Energy Mater.

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“…[57] The specific energy and specific power values obtained from our solid-state symmetric device are higher than those of earlier reported transition metal oxide/sulfide based devices (Table 2). [64][65][66][67][68]…”

Section: Electrochemical Assessment Of Portable Symmetric Solid Super...mentioning

confidence: 99%

Boosting the Multifunctional Properties of MnCo₂O₄‐MnCo₂S₄ Heterostructure for Portable All‐Solid‐State Symmetric Supercapacitor, Methanol Oxidation and Hydrogen Evolution Reaction

et al. 2021

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This article reports on the preparation of MnCo2O4‐MnCo2S4 heterostructure by facile solvothermal route towards the application of supercapacitor‐based energy storage as well as methanol electro‐oxidation and hydrogen evolution reaction. Dunn's methodology has been adopted for the evaluation of charge storage by capacitive process and diffusion‐controlled process and the quantification of the charge stored at exterior surface and interior surface was done by Trasatti's approach. The prepared heterostructure was utilized as an electrode in the symmetric solid‐state device based on Na2MoO4 redox electrolyte and exhibits remarkable performance in terms of specific capacity, cyclic performance, energy, and power density. The fabricated device exhibits a specific capacity of 417 C g−1 at a specific current of 1 A g−1, and shows retention of 84.2 % after 5000 galvanostatic charge‐discharge cycles, and specific energy of 81 Wh kg−1 at a specific power of 700 W kg−1. Series combination of two solid‐state symmetric devices was capable to light up a red LED for 30 min and an array of 22 red LEDs for 8 min. The heterostructure shows remarkable catalytic activity for methanol electrooxidation by increasing catalytic current almost four times in 2 M methanol and 1 M KOH electrolyte at 0.6 V and also lowering the onset potential as 0.331 V. The excellent electrocatalytic activity of MnCo2O4‐MnCo2S4 heterostructure towards the hydrogen evolution reaction was observed by showing the requirement of low overpotential (‐175 mV) to reach the current density of −10 mA cm−2 along with small Tafel slope (102 mV dec−1). The electrode material revealed enormous stability by providing a constant current over 20 h in chronoamperometry measurements. The better electrochemical performance of microspheres could be attributed to large surface area which promotes the catalytic reactions at the large number of active sites.

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“…For example, the nanostructures of the electrode surface increase both the surface area and the electrochemically active states, as well as shorten ionic diffusion pathways (Lin et al, 2016;Zhao et al, 2020). Furthermore, the electrode material being in a composite structure not only improves conductivity but also increases the stability of the structure (Chen et al, 2014;Xie et al, 2018). Threedimensional (3D) structures such as reduced graphene oxides, carbon nanotubes, carbonbased materials, conductive polymers and various metal oxides are investigated for new generation energy storage devices (Moon et al, 2017 (Rajesh et al 2017;Wang et al, 2019;Wu et al, 2015).…”

Section: Supercapacitorsmentioning

confidence: 99%

Investigation of Flower-like ZnCo2O4 Nanowire Arrays Growth on 3D-Ni Foam as Supercapacitor Electrode Material

Tuzluca

2020

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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As a supercapacitor electrode material, flower-like ZnCo 2 O 4 nanowire (NW) arrays were directly grown on 3D-Ni foam using the hydrothermal method. Structural and morphological analysis of the electrode material was characterized by XRD, FE-SEM, and EDS, while its electrochemical analysis was characterized by CV, GCD, and EIS. The electrode material demonstrated excellent electrochemical performance with a maximum areal capacitance of 1.01 F cm -2 at a current density of 0.5 mA cm -2 . After 2.000 charge-discharge cycles, the electrode showed excellent cycle stability, having 72% of the initial areal capacitance.

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Core-shell structured ZnCo2O4@ZnWO4 nanowire arrays on nickel foam for advanced asymmetric supercapacitors

Cited by 77 publications

References 54 publications

Interfacial Engineering in Crystalline Cobalt Tungstate/Amorphous Cobalt Boride Heterogeneous Nanostructures for Enhanced Electrochemical Performances

Interfacial Engineering in Crystalline Cobalt Tungstate/Amorphous Cobalt Boride Heterogeneous Nanostructures for Enhanced Electrochemical Performances

Boosting the Multifunctional Properties of MnCo₂O₄‐MnCo₂S₄ Heterostructure for Portable All‐Solid‐State Symmetric Supercapacitor, Methanol Oxidation and Hydrogen Evolution Reaction

Investigation of Flower-like ZnCo2O4 Nanowire Arrays Growth on 3D-Ni Foam as Supercapacitor Electrode Material

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Core-shell structured ZnCo2O4@ZnWO4 nanowire arrays on nickel foam for advanced asymmetric supercapacitors

Cited by 77 publications

References 54 publications

Interfacial Engineering in Crystalline Cobalt Tungstate/Amorphous Cobalt Boride Heterogeneous Nanostructures for Enhanced Electrochemical Performances

Interfacial Engineering in Crystalline Cobalt Tungstate/Amorphous Cobalt Boride Heterogeneous Nanostructures for Enhanced Electrochemical Performances

Boosting the Multifunctional Properties of MnCo2O4‐MnCo2S4 Heterostructure for Portable All‐Solid‐State Symmetric Supercapacitor, Methanol Oxidation and Hydrogen Evolution Reaction

Investigation of Flower-like ZnCo2O4 Nanowire Arrays Growth on 3D-Ni Foam as Supercapacitor Electrode Material

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Boosting the Multifunctional Properties of MnCo₂O₄‐MnCo₂S₄ Heterostructure for Portable All‐Solid‐State Symmetric Supercapacitor, Methanol Oxidation and Hydrogen Evolution Reaction