Electrochemical Properties of Nanocomposite Nanoporous Carbon / Nickel Hydroxide

Hemiy, O. M.; Yablon, L. S.; Budzulyak, І. М.; Budzulyak, S. I.; Morushko, О. V.; Kachmar, Andrii

doi:10.21272/jnep.8(4(2)).04074

Cited by 7 publications

(5 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3). In electrochemical studies of α and β phases of nickel hydroxide [17,18] was found that the oxidation peaks lie in the range of 0.29-0.5 V for both phases, while the cathodic reduction peaks at 0.24 V for β-Ni(OH)2 and 0.16 V for α-Ni(OH)2, which agrees with the results obtained for initial NiMoO4 in this work.…”

Section: Resultssupporting

confidence: 90%

Electrochemical Behavior of Nanocrystalline NiMoO<sub>4</sub> Hydrate Modified by Ultrasound

Popovych

Budzulyak

Khemii

et al. 2023

JNanoR

View full text Add to dashboard Cite

To improve the specific capacitance, power and energy of electrical energy storage devices, in particular hybrid capacitors, various methods of cathode material modification are used. One of the methods of modifying nanostructured materials without applying high temperatures, pressures and long reaction times is ultrasonic treatment. Although the interaction of ultrasound with the structure and surface of electrode materials is well enough studied, there are few works that investigate the optimal duration of ultrasonic treatment and its relationship with the capacitive characteristics of these materials. Therefore, we investigated the efficiency of ultrasonic dispersion of nanocrystalline nickel molybdate hydrate for 15, 60 and 90 minutes. The appearance of two cathodic peaks on cyclic voltammetry patterns was analyzed and the charge / discharge mechanism of the electrode based on nanocrystalline NiMoO4 hydrate was presented. Based on the results of potentiodynamic and galvanostatic studies the specific capacitances of the initial NiMoO4 and the material modified by ultrasound for 15, 60 and 90 minutes were calculated. The proton diffusion coefficients of nickel molybdate hydrate were determined on the basis of the Randles–Sevcik equation. NiMoO4 subjected to ultrasonic dispersion for 60 min as a cathode material in a hybrid electrochemical system was tested.

show abstract

Section: Resultssupporting

confidence: 90%

Electrochemical Behavior of Nanocrystalline NiMoO<sub>4</sub> Hydrate Modified by Ultrasound

Popovych

Budzulyak

Khemii

et al. 2023

JNanoR

View full text Add to dashboard Cite

show abstract

“…Another promising solution is an asymmetric hybrid supercapacitor (HS) that combines a non-Faradaic double-layer capacitive electrode based on activated carbon with a transition metal oxide electrode. Layered transition metal hydroxides and sulfides are the promising electrode materials for HS [1][2][3][4]. Among them ultrafine nickel hydroxide is attractive for investigations due to its * E-mail: kotsuybynsky@gmail.com structural and electronic properties.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, morphology, electrical conductivity and electrochemical properties of α-Ni(OH)₂ and its composites with carbon

Khemii

Будзуляк

Kotsyubynsky

et al. 2019

Materials Science-Poland

View full text Add to dashboard Cite

A simple and effective hydrothermal synthesis of spherical α-Ni(OH)2 particles and α-Ni(OH)2/carbon composites was proposed. The mechanism of ultrafine α-Ni(OH)2 phase forming and correlations between synthesis conditions, morphology, electrical conductivity were analyzed. It was found that carbon nanoparticles form an electric conductive cover on nickel hydroxide microparticles during synthesis which increases overall electronic conductivity of the composite material. α-Ni(OH)2 and α-Ni(OH)2/C samples were tested as electrodes for hybrid supercapacitors. It was found that carbon coverings stabilize α-Ni(OH)2 phase in the alkaline medium. The comparison of the influence of laser irradiation and ultrasonic treatment on the electrochemical performance of the obtained materials was made.

show abstract

“…In NiMoO4 / C composites, the content of carbon material was 1, 5 and 10 % by weight, as it was found [9] that in the mechano-chemical synthesis of materials, the highest specific capacitance is achieved by a composite based on nickel hydroxide with a carbon content of 10 %. Therefore, we formed four NiMoO4 / C composites with carbon content: 1 and 10% (without ultrasonic exposure) and 1 and 5 % (carbon material was subjected to ultrasonic dispersion (denoted as С us)).…”

Section: Resultsmentioning

confidence: 98%

Electrochemical and electrical properties of nickel molybdate / carbon material composites

Popovych

Budzulyak

Kotsyubynsky

et al. 2021

Phys. Chem. Solid St.

View full text Add to dashboard Cite

The aim of this paper is to establish the optimal content of carbon material in composites with nanocrystal hydrate nickel molybdate. To achieve this, NiMoO4 / C composites with a carbon material content of 1, 5 and 10% by weight (with and without ultrasonic irradiation) were obtained by hydrothermal method. As a result of electrochemical studies, it was found that the maximum specific capacitance of 628 F/g is reached by a composite with a carbon content of 1% after ultrasonic exposure, while this composite shows excellent electrical conductivity, which is 0.47 Ohm-1m-1.

show abstract

Electrochemical Properties of Nanocomposite Nanoporous Carbon / Nickel Hydroxide

Cited by 7 publications

References 8 publications

Electrochemical Behavior of Nanocrystalline NiMoO<sub>4</sub> Hydrate Modified by Ultrasound

Electrochemical Behavior of Nanocrystalline NiMoO<sub>4</sub> Hydrate Modified by Ultrasound

Synthesis, morphology, electrical conductivity and electrochemical properties of α-Ni(OH)₂ and its composites with carbon

Electrochemical and electrical properties of nickel molybdate / carbon material composites

Contact Info

Product

Resources

About

Electrochemical Properties of Nanocomposite Nanoporous Carbon / Nickel Hydroxide

Cited by 7 publications

References 8 publications

Electrochemical Behavior of Nanocrystalline NiMoO<sub>4</sub> Hydrate Modified by Ultrasound

Electrochemical Behavior of Nanocrystalline NiMoO<sub>4</sub> Hydrate Modified by Ultrasound

Synthesis, morphology, electrical conductivity and electrochemical properties of α-Ni(OH)2 and its composites with carbon

Electrochemical and electrical properties of nickel molybdate / carbon material composites

Contact Info

Product

Resources

About

Synthesis, morphology, electrical conductivity and electrochemical properties of α-Ni(OH)₂ and its composites with carbon