Electrochemical Studies of Microwave Synthesised Bimetallic Sulfides Nanostructures As Faradaic Electrodes.

Bello, Abdulhakeem; Fashedemi, Omobosede O.; Momodu, Damilola Y.; Barzegar, Farshad; Masikhwa, T.M.; Taghizadeh, Fatemeh; Dangbegnon, Julien K.; Manyala, Ncholu I.

doi:10.1016/j.electacta.2015.06.072

Cited by 15 publications

(7 citation statements)

References 32 publications

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“…The Nyquist plots are fitted to their specific electronic circuit model as shown in the figure; where R s stands for the equivalent series resistance related to the ionic resistance of the electrolyte: the intrinsic resistance of the substrate and the contact resistance at the active material/current collector interface (equivalent to high frequency intercept on the real Z or x axis); L is the selfinductance related to electrical connections [42]; W is a Warburg impedance arising from a diffusion-controlled process at low frequency; R ct is the charge transfer resistance of the double-layer capacitance [43] and the constant phase element (CPE, Q) was used to replace the double-layer capacitance (Cdl) because of the deviation from an ideal capacitor [44]. Moreover, the straight line found with angle lower than 45° for all samples is the capacitative behavior characteristic under diffusion control.…”

Section: Electrochemical Impedance Spectroscopy Resultsmentioning

confidence: 99%

“…Moreover, the straight line found with angle lower than 45° for all samples is the capacitative behavior characteristic under diffusion control. However, the difference in straight lines slopes represents the diffusive resistance [42]. Based on this simulation, the calculated values for equivalent series resistance and charge transfer resistance are shown in Table 3.…”

Section: Electrochemical Impedance Spectroscopy Resultsmentioning

confidence: 99%

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Electrochemical measurements of synthesized nanostructured β-Ni(OH)2 using hydrothermal process and activated carbon based nanoelectroactive materials

et al. 2018

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In this investigation, nickel hydroxide Ni(OH) 2 based nanostructured materials were synthesized by simple and low cost free template hydrothermal method at two different growth temperatures with and without SDS surfactant. The X-ray diffraction, Raman spectroscopy and field emission scanning electron microscopy analysis confirmed the formation of β-Ni(OH) 2 pure brucite crystalline phase in spherical nanoparticle morphology with an average diameter ranging from 8 to 27 nm. In the second step, these nanospherical agglomerated hydroxide particles with activated carbon addition were performed as electroactive materials deposited on nickel foam current collector as working electrodes. The electrochemical tests in a three-electrode configuration using 6 MKOH electrolyte show that the best electroactive NPs (β bc-Ni(OH) 2 and β-Ni(OH) 2 obtained at optimized conditions, have a maximum specific capacitance (C s) of 4697 F g −1 and 3431 F g −1 at 5 mV s −1 scan rate with a specific capacity (Q s) of 744 mAh g −1 and 618 mAh g −1 at 1 A g −1 current density with an R s of about 0.24 and 0.28 Ω, respectively. At 30 A g −1 after 1700 cycles, the coulombic retention is around 99.06% (or capacity retention 109 mAh g −1), demonstrating remarkable cycling stability for Ni based hydroxide.

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Section: Electrochemical Impedance Spectroscopy Resultsmentioning

confidence: 99%

Section: Electrochemical Impedance Spectroscopy Resultsmentioning

confidence: 99%

Electrochemical measurements of synthesized nanostructured β-Ni(OH)2 using hydrothermal process and activated carbon based nanoelectroactive materials

et al. 2018

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“…The use of microwave irradiation facilitated the manufacturing of Ni x Co y S 4 materials of controlled microstructure [ 252 ] and enhanced performance was achieved at mass loadings of 15–20 mg cm −2 . Significant efforts have been made to enhance performance of sulfides by the formation of composites, containing graphene [ 253 ] or graphene quantum dots.…”

Section: Sulfides and Nitridesmentioning

confidence: 99%

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

Chen

Sahu

et al. 2020

Advanced Energy Materials

201

128

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Pseudocapacitive materials are used for supercapacitor applications due to their exceptionally high capacitance and low cost. Good capacitive performance of the pseudocapacitive materials at high active mass loadings is vital for the development of the next generation of supercapacitor devices. This review describes recent advances in materials and nanotechnologies, which allows the development of advanced pseudocapacitive devices with high active mass. An important breakthrough is the discovery of novel dispersing and capping agents for the colloidal processing of nanoparticles. Particularly important are novel co‐dispersants that exhibit enhanced adsorption on materials of different types, such as inorganic nanoparticles, carbon nanotubes, and graphene. Conceptually new strategies are designed to fabricate coated particles. Recent innovations pave the way for the development of multifunctional redox‐active dopants‐dispersants and dopants‐oxidants to manufacture conductive polymer composites. Among the most important advances in nanotechnology is the development of template methods and heterocoagulation techniques for composite manufacturing. The progress in the design of novel surface modification techniques and materials, discovery of advanced anchoring groups, and development of liquid–liquid extraction allows agglomerate‐free processing of nanomaterials and composites. This review describes fundamental aspects of novel technologies and their applications in the manufacturing of pseudocapacitive devices for energy storage.

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“…In brief, KMnO 4 (0.6g) and MC (0.04g) were dispersed to 23 deionized water (50mL) under stirring. After 12h, 2 mL of 98% H 2 SO 4 was added to the 24 suspension still under stirring for 2 h. Then, the suspension was transferred into a 100 mL vibration of MnO 6 octahedral [27,39] .…”

mentioning

confidence: 99%

“…Among various 25 metal oxides, manganese dioxide exhibits several remarkable characteristics, such as high 26 theoretical capacitance (>1370 F·g -1 ) [1,[22][23][24][25][26] , high abundance in nature, and low cost 27 [1,3,4,15,27] . However, the application of MnO 2 has been seriously restricted by its low 28 electrical conductivity (10 -5 to 10 -6 S·cm -1 ) [28,29] and structure instability against cycling M A N U S C R I P T with reductive agent, e.g.…”

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confidence: 99%

Porous carbon directed growth of carbon modified MnO2 porous spheres for pseudocapacitor applications

Wang

Liu

et al. 2017

Journal of Alloys and Compounds

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Porous carbon directed growth of carbon modified MnO 2 porous spheres for pseudocapacitor applications, Journal of Alloys and Compounds (2017), doi: 10.1016/j.jallcom.2017 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Electrochemical Studies of Microwave Synthesised Bimetallic Sulfides Nanostructures As Faradaic Electrodes.

Abstract: A microwave irradiation method has been used to prepare mixed nickel cobalt sulfide

Cited by 15 publications

References 32 publications

Electrochemical measurements of synthesized nanostructured β-Ni(OH)2 using hydrothermal process and activated carbon based nanoelectroactive materials

Electrochemical measurements of synthesized nanostructured β-Ni(OH)2 using hydrothermal process and activated carbon based nanoelectroactive materials

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

Porous carbon directed growth of carbon modified MnO2 porous spheres for pseudocapacitor applications

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