Effect of solvent for tailoring the nanomorphology of multinary CuCo2S4 for overall water splitting and energy storage

Zequine, Camila; Bhoyate, Sanket; Wang, Fangzhou; Li, Xianglin; Siam, Khamis; Kahol, Pawan K.; Gupta, Ram K.

doi:10.1016/j.jallcom.2019.01.012

Cited by 66 publications

(34 citation statements)

References 33 publications

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“…Finally, the storage potential of fabricated electrode was estimated by energy density ( E ) as well as power density ( P ) using discharge voltage via following equations and expressed as W h kg −1 and W kg −1 ;

Energy Density ((), E) = \frac{C \times ∆ V 2}{7.2}

Power Density ((), P) = \frac{E \times 3600}{t}

where C is capacitance via GCD, ∆ V ( V ) is applied window, and t (s) is discharge time . In the present research, maximum calculated energy density of ZnO@NiO was 3.13 against power density of 138.…”

Section: Resultsmentioning

confidence: 91%

“…The fabricated electrode has low charge‐transfer resistance ( R ct ) according to semicircle as observed in Figure A. This is furthered due to the faradaic reactions of Ni–Zn–O as stated by Ujjain et al, Xiao et al, Zequine et al, thus R ct is confirming the enhanced pseudocapacitance of the electrode. It can be further observed in the plot 8a that there is a sharp vertical line of Z w .…”

Section: Resultsmentioning

confidence: 99%

“…The Ragone plot (Figure C) depicts that when power density increased, the energy density was decreased and vice versa. Negative correlation between energy density and powder density is a general phenomena associated with numerous other fabricated supercapcitors …”

Section: Resultsmentioning

confidence: 99%

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Effect of NiO on organic framework functionalized ZnO nanoparticles for energy storage application

et al. 2020

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Functionalization of metal oxides nanomaterial by different organic and inorganic species could considerably enhance the electrochemical performance of a supercapacitor. Here, we have synthesized and functionalized ZnO nanoparticles (NPs) via organic compounds of E. cognate and then doped the synthesized nanomaterials by NiO following hydrothermal route involving the bioactive compounds. As synthesized ZnO@NiO was analyzed by field emission-scanning electron microscopy at nanoscale. The organic functional groups were delineated by X-ray photoelectron spectroscopy as well as by Fourier transform infrared spectroscopy. What is more, Tauc plot revealed drastically decreased band gap energy of ZnO@NiO to 2.48 eV resulting in an enhanced electrochemical properties. Therefore, organic framework derived ZnO@NiO nanomaterial was scrutinized as an electrode for supercapacitor by galvanostatic charge-discharge, cyclicvoltammetry and electrochemical impedance spectroscopy. ZnO@NiO electrode demonstrated specific capacitance of 185 Fg −1 by cyclicvoltammetry, proposing its potential towards supercapacitor due to nanoscale particles and incorporated C, O, and N atoms of organic compounds. K E Y W O R D Sbio-template, low band gap energy, nanostructures, stabilizing agents, supercapacitor, zinc oxides: nickel oxide

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Energy Density ((), E) = \frac{C \times ∆ V 2}{7.2}

Power Density ((), P) = \frac{E \times 3600}{t}

Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 99%

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Effect of NiO on organic framework functionalized ZnO nanoparticles for energy storage application

et al. 2020

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“…Previously, electroactive materials such as structured carbons [8][9][10][11][12][13][14], transition metal oxides, and sulfides [15][16][17][18] have been studied for applications in batteries, supercapacitors, and fuel cells, as well as for water splitting. However, the lower activity of carbon-based materials, the inferior electronic conductivity of transition metal oxides, and the poor stability of transition metal sulfides limit their applicability for future energy devices [14,[19][20][21]. Transition metal-based systems including oxides, hydroxides, or sulfides of cobalt and iron have been studied in the past few years for energy conversion or storage applications [22][23][24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Electrodeposited Nanostructured CoFe2O4 for Overall Water Splitting and Supercapacitor Applications

et al. 2019

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To contribute to solving global energy problems, a multifunctional CoFe 2 O 4 spinel was synthesized and used as a catalyst for overall water splitting and as an electrode material for supercapacitors. The ultra-fast one-step electrodeposition of CoFe 2 O 4 over conducting substrates provides an economic pathway to high-performance energy devices. Electrodeposited CoFe 2 O 4 on Ni-foam showed a low overpotential of 270 mV and a Tafel slope of 31 mV/dec. The results indicated a higher conductivity for electrodeposited compared with dip-coated CoFe 2 O 4 with enhanced device performance. Moreover, bending and chronoamperometry studies suggest excellent durability of the catalytic electrode for long-term use. The energy storage behavior of CoFe 2 O 4 showed high specific capacitance of 768 F/g at a current density of 0.5 A/g and maintained about 80% retention after 10,000 cycles. These results demonstrate the competitiveness and multifunctional applicability of the CoFe 2 O 4 spinel to be used for energy generation and storage devices.

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“…On the other hand, for dopants, the valence and phase diversity of copper-cobalt, as well as the relatively rich redox chemistry, are considered as ideal catalytic materials for water oxidation catalysts [24]. What is more, multicomponent copper-based sulfides are widely used in many fields due to their superior carrier concentration and charge transfer characteristics [25,26]. The synergistic effect of bimetallic construction between copper and other types of atoms is beneficial in the optimization of electronic structure, increasing the number of active sites, and improving conductivity, and it will greatly promote the activity of electrocatalysis [27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Engineering Ternary Copper-Cobalt Sulfide Nanosheets as High-performance Electrocatalysts toward Oxygen Evolution Reaction

et al. 2019

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The rational design and development of the low-cost and effective electrocatalysts toward oxygen evolution reaction (OER) are essential in the storage and conversion of clean and renewable energy sources. Herein, a ternary copper-cobalt sulfide nanosheets electrocatalysts (denoted as CuCoS/CC) for electrochemical water oxidation has been synthesized on carbon cloth (CC) via the sulfuration of CuCo-based precursors. The obtained CuCoS/CC reveals excellent electrocatalytic performance toward OER in 1.0 M KOH. It exhibits a particularly low overpotential of 276 mV at current density of 10 mA cm−2, and a small Tafel slope (58 mV decade−1), which is superior to the current commercialized noble-metal electrocatalysts, such as IrO2. Benefiting from the synergistic effect of Cu and Co atoms and sulfidation, electrons transport and ions diffusion are significantly enhanced with the increase of active sites, thus the kinetic process of OER reaction is boosted. Our studies will serve as guidelines in the innovative design of non-noble metal electrocatalysts and their application in electrochemical water splitting

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Effect of solvent for tailoring the nanomorphology of multinary CuCo2S4 for overall water splitting and energy storage

Cited by 66 publications

References 33 publications

Effect of NiO on organic framework functionalized ZnO nanoparticles for energy storage application

Effect of NiO on organic framework functionalized ZnO nanoparticles for energy storage application

Electrodeposited Nanostructured CoFe2O4 for Overall Water Splitting and Supercapacitor Applications

Engineering Ternary Copper-Cobalt Sulfide Nanosheets as High-performance Electrocatalysts toward Oxygen Evolution Reaction

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