Flower-Like MoS2 for Next-Generation High-Performance Energy Storage Device Applications

2019 ◽  
Vol 25 (6) ◽  
pp. 1394-1400 ◽  
Author(s):  
Sumit Majumder ◽  
Sangam Banerjee
Keyword(s):  
Electron Microscopy ◽  
Energy Storage ◽  
High Performance ◽  
Large Scale ◽  
Electrochemical Impedance ◽  
Coupling Effect ◽  
Storage Device ◽  
Active Surface Area ◽  
Cyclic Voltammogram ◽  
Discharge Current Density

AbstractHere, a well crystalline 3D flower-like structured MoS2 (~420 nm) has been successfully synthesized on a large scale by a simple hydrothermal technique. The evolution of morphology in the formation process has also been investigated. The crystallinity, purity, and morphology of the sample are characterized by powder X-ray diffraction, Fourier-transform infrared spectroscopy, fieldemission scanning electron microscopy (FESEM), and transmission electron microscopy (TEM) techniques. The FESEM and TEM images reveal that the sample exhibits a uniform 3D flower-like microsphere shape with folded nanosheets, which are stretched out along the edge of the microsphere. The electrochemical performance of the sample has been investigated by cyclic voltammogram, galvanostatic charge–discharge, and electrochemical impedance spectroscopy studies. The results of the electrochemical analysis suggest that the material delivers a maximum specific capacitance (Csp) of 350 F/g at a discharge current density of 0.25 A/g with energy density 17.5 Wh/kg. It also exhibits good capability and excellent cyclic stability (94% capacity retention after 1,000 cycles in 1 A/g) owing to the coupling effect of electrical conductivity with the interesting morphology and larger active surface area. Hence, the sample may be used as a promising electrode material for high-performance energy storage devices.

STUDY OF COPPER FERRITE NANOWIRE FORMATION IN PRESENCE OF CARBON NANOTUBES AND INFLUENCE OF FLUORINATION ON HIGH PERFORMANCE SUPERCAPACITOR ENERGY STORAGE APPLICATION

2012 ◽  
Vol 05 (04) ◽  
pp. 1250046 ◽  
Author(s):  
SOUMEN GIRI ◽  
DEBASIS GHOSH ◽  
ALEXANDER P. KHARITONOV ◽  
CHAPAL KUMAR DAS
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Energy Storage ◽  
High Performance ◽  
Electrode System ◽  
Modern World ◽  
Storage Device ◽  
Copper Ferrite ◽  
Transmission Electron ◽  
Supercapacitor Energy Storage

Supercapacitors are highly attractive energy storage device of the modern world. It can supply peak pulse power and high cycle stability to an electrochemical system. Here, we have explored the formation of copper ferrite ( CuFe2O4 ) nanowire formation in presence of carbon nanotubes (CNTs) and enhancement of electrochemical performance on fluorination. All the electrochemical characterization was studied by three electrode system. Fourier transform infrared spectroscopy (FT-IR) was performed to test the functionality present in the composite. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) study had been carried out to observe the change in surface and bulk morphology of the composites which showed that CuFe2O4 nanowires are attached with CNTs or fluorinated CNTs. This fluorinated nanocomposite shows the highest specific capacitance of 267 F/g.

Synthesis and Electrochemical Properties of NiFe-Se/rGO Nanocomposites

2020 ◽  
Vol 13 ◽  
Author(s):  
Rouwei Yan ◽  
Biao Xu ◽  
K. P. Annamalai ◽  
Tianlu Chen ◽  
Zhiming Nie ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Graphene Oxide ◽  
Energy Storage ◽  
Synergistic Effects ◽  
Nitrogen Adsorption ◽  
Storage Device ◽  
Energy Storage And Conversion ◽  
Step Method ◽  
Practical Applications ◽  
Device Applications

Background : Renewable energies are in great demand because of the shortage of traditional fossil energy and the associated environmental problems. Ni and Se-based materials are recently studied for energy storage and conversion owing to their reasonable conductivities and enriched redox activities as well as abundance. However, their electrochemical performance is still unsatisfactory for practical applications. Objective: To enhance the capacitance storage of Ni-Se materials via modification of their physiochemical properties with Fe. Methods: A two-step method was carried out to prepare FeNi-Se loaded reduced graphene oxide (FeNi-Se/rGO). In the first step, metal salts and graphene oxide (GO) were mixed under basic condition and autoclaved to obtain hydroxide intermediates. As a second step, selenization process was carried out to acquire FeNi-Se/rGO composites. Results: X-ray diffraction measurements (XRD), nitrogen adsorption at 77K, scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were carried out to study the structures, porosities and the morphologies of the composites. Electrochemical measurements revealed that FeNi-Se/rGO notably enhanced capacitance than the NiSe/G composite. This enhanced performance was mainly attributed to the positive synergistic effects of Fe and Ni in the composites, which not only had influence on the conductivity of the composite but also enhanced redox reactions at different current densities. Conclusion: NiFe-Se/rGO nanocomposites were synthesized in a facile way. The samples were characterized physicochemically and electrochemically. NiFeSe/rGO giving much higher capacitance storage than the NiSe/rGO explained that the nanocomposites could be an electrode material for energy storage device applications.

scholarly journals Layered double hydroxide membrane with high hydroxide conductivity and ion selectivity for energy storage device

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Jing Hu ◽  
Xiaomin Tang ◽  
Qing Dai ◽  
Zhiqiang Liu ◽  
Huamin Zhang ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Ion Selectivity ◽  
Storage Device ◽  
Hydroxyl Groups ◽  
Flow Battery ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Ions Transport ◽  
Double Hydroxides

AbstractMembranes with fast and selective ions transport are highly demanded for energy storage devices. Layered double hydroxides (LDHs), bearing uniform interlayer galleries and abundant hydroxyl groups covalently bonded within two-dimensional (2D) host layers, make them superb candidates for high-performance membranes. However, related research on LDHs for ions separation is quite rare, especially the deep-going study on ions transport behavior in LDHs. Here, we report a LDHs-based composite membrane with fast and selective ions transport for flow battery application. The hydroxide ions transport through LDHs via vehicular (standard diffusion) & Grotthuss (proton hopping) mechanisms is uncovered. The LDHs-based membrane enables an alkaline zinc-based flow battery to operate at 200 mA cm−2, along with an energy efficiency of 82.36% for 400 cycles. This study offers an in-depth understanding of ions transport in LDHs and further inspires their applications in other energy-related devices.

scholarly journals A germanium and zinc chalcogenide as an anode for a high-capacity and long cycle life lithium battery

RSC Advances ◽  
2019 ◽  
Vol 9 (60) ◽  
pp. 35045-35049
Author(s):  
Xu Chen ◽  
Jian Zhou ◽  
Jiarui Li ◽  
Haiyan Luo ◽  
Lin Mei ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Lithium Battery ◽  
Large Scale ◽  
High Capacity ◽  
Lithium Ion ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Long Cycle Life ◽  
Zinc Chalcogenide

High-performance lithium ion batteries are ideal energy storage devices for both grid-scale and large-scale applications.

MWCNT incorporated wool-ball-like CuO@NiO hybrid nanostructures for high-performance energy storage device

2021 ◽  
pp. 161313
Author(s):  
Mahasweta Chatterjee ◽  
Samik Saha ◽  
Sachindranath Das ◽  
Satyaranjan Bhattacharyya ◽  
Swapan Kumar Pradhan
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Hybrid Nanostructures ◽  
Storage Device ◽  
Energy Storage Device

Large-Scale Multifunctional Electrochromic-Energy Storage Device Based on Tungsten Trioxide Monohydrate Nanosheets and Prussian White

2017 ◽  
Vol 9 (35) ◽  
pp. 29872-29880 ◽  
Author(s):  
Zhijie Bi ◽  
Xiaomin Li ◽  
Yongbo Chen ◽  
Xiaoli He ◽  
Xiaoke Xu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Tungsten Trioxide ◽  
Large Scale ◽  
Storage Device ◽  
Energy Storage Device

Preparation of yolk–shell structured Ag@Cu particles and their application in high performance electrochemical sensing of p-aminobenzoic acid

2019 ◽  
Vol 97 (2) ◽  
pp. 140-146
Author(s):  
Tian Gan ◽  
Zhikai Wang ◽  
Mengru Chen ◽  
Wanqiu Fu ◽  
Haibo Wang ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
High Performance ◽  
Electrochemical Impedance ◽  
High Sensitivity ◽  
Differential Pulse ◽  
Electrochemical Sensing ◽  
High Catalytic Activity ◽  
Aminobenzoic Acid ◽  
Transmission Electron

In this work, the Ag@Cu particles with yolk–shell nanostructure was prepared by facile solvothermal method, which was modified on glassy carbon electrode (GCE) to fabricate electrochemical sensor for the convenient and fast determination of p-aminobenzoic acid (PABA). The surface morphology and electrochemical properties of the as-prepared Ag@Cu nanocomposite modified electrode were characterized by scanning electron microscopy, transmission electron microscopy, chronocoulometry, and electrochemical impedance spectroscopy. Further, the electrochemical sensing of PABA was performed on the Ag@Cu/GCE using cyclic voltammetry and differential pulse voltammetry techniques, showing high catalytic activity. Under the optimal conditions, the sensor exhibited a wide linear range, high sensitivity, and low detection limit of 0.315 μmol/L for PABA. The developed sensor was also successfully applied for PABA detection in anesthetic and cosmetics with satisfactory results.

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