Composite coatings with nickel matrix and graphene as dispersed phase

Gajewska-Midziałek, Anna

doi:10.2478/pjct-2018-0008

Cited by 10 publications

(4 citation statements)

References 25 publications

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“…In our research, we have been concentrating on compositing rGO with conducting polymers, but electrochemical methods are very useful, not only for organic materials, but also for compositing with inorganic materials such as nickel [33][34][35].…”

Section: Preparation Of Alternating Layer Films With Conducting Polymersmentioning

confidence: 99%

Reduction of Graphene Oxide Using an Environmentally Friendly Method and Its Application to Energy-Related Materials

Imae

2021

Coatings

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Since graphene oxide can be synthesized in large quantities by oxidation of inexpensively available natural graphite and can be dispersed in water, it can be coated onto a variety of substrates by solution processes. Graphene oxide can also be reduced to yield reduced graphene oxide, which has similar electronic features to graphene. This review introduces the environmentally friendly methods for the synthesis of reduced graphene oxide utilizing electrochemical and thermal methods and summarizes our recent research results on their application to energy-related materials such as electric double-layer capacitors, thermoelectric devices, transparent conductive films, and lithium-ion secondary batteries.

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Section: Preparation Of Alternating Layer Films With Conducting Polymersmentioning

confidence: 99%

Reduction of Graphene Oxide Using an Environmentally Friendly Method and Its Application to Energy-Related Materials

Imae

2021

Coatings

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“…За последние пять лет наблюдается интерес исследователей к получению и исследованию свойств композиционных электрохимических покрытий на основе никелевой, цинковой, оловянной матриц с включением наночастиц графена [15][16][17][18][19][20][21][22][23]. Включение наночастиц приводит, как правило, к значительному изменению кристаллической структуры осадков и размеров зерен осаждаемого металла, улучшению коррозионной стойкости композиционных покрытий, снижению коэффициентов трения и износа, приданию эффекта сухой смазки [19].…”

Section: Abstract: Graphene Composite Coatingsunclassified

Production and Properties of Composite Electrochemical Coatings With Electrochemically Dispersed Graphene Based on Nickel Matrix

Bratkov¹,

Yudina²,

Мельников³

et al. 2020

IVKKT

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In this work, the effect of addition of colloidal solutions of electrochemical exfoliated graphene (EEG) to the Watts bath on the process of obtaining composite coatings based on a nickel matrix was studied. It was found that the introduction of nanoparticle additives has a significant effect on the value of cathodic overvoltage during electro reduction of Ni2+. The strongest inhibition of the cathode process takes place with the introduction of 0.2 g/l of additives investigated. Further increase in the concentration of nanoparticles in the bath reduces the effect. The inhibition of the cathodic reduction of Ni2+ is associated with the adsorption of graphene nanoparticles on the active faces of growing nickel crystallites and the blocking of the accessible surface for Ni2+ reduction. Due to the increase in cathodic polarization during the deposition of the composite coating, the crystallites of the deposited nickel decrease in size and the texture of the crystal structure of the coating changes. According to energy dispersive spectroscopy data, carbon has been included in the composite coating. The carbon content in the coating increases with increasing concentration of nanoparticles in the working electrolyte. The inclusion of negatively charged nanoparticles of electrochemically dispersed graphene in the resulting precipitate becomes possible due to adsorption of Ni2+ and recharging of graphene nanoparticles. It was found that the optimal concentration of electrochemically dispersed graphene in the working electrolyte is 0.1-0.2 g/l. At a given nanoparticle content in the working bath, the porosity and roughness of the coatings decreases. The Tafel polarization curves for composite coating samples obtained in a 0.5M NaCl solution showed that the inclusion of graphene nanoparticles in the resulting coating leads to a shift of the corrosion potential to the negative area. With an increase in the carbon content in the coating, the shift in corrosion potentials increases, and the value of corrosion currents increases. For samples of composite coatings obtained at an EEG additive concentration of 0.1 g/l, a slight improvement in the protective properties is noted, which is associated with a decrease in the porosity of the coatings.

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“…However, the corrosion current of composite coatings is two times smaller than that of nickel coating, despite the much higher degree of surface development of composite coatings. The increase in the corrosion resistance of the Ni/GO coatings can be explained by limiting the access of corrosive agents to the matrix through embedded graphene oxide flakes, which constitute a barrier layer [12,31]. Surface of the coatings after corrosion tests are shown in Figure 14.…”

Section: Coatings Propertiesmentioning

confidence: 99%

“…Recently, a great deal of interest is focused on the two-dimensional form of the carbon, i.e. on the graphene as a dispersion phase in the composite material [12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Archives of Metallurgy and Materials

Cieślak¹,

Trzaska²

2019

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The paper presents the results of research on nanocomposite nickel/graphene oxide (Ni / GO) coatings produced by electrochemical reduction method on a steel substrate. Discussed is the method of manufacturing composite coatings with nickel matrix and embedded graphene oxide flakes. For comparative purposes, the studies also included a nanocrystalline Ni coating without embedded graphene oxide flakes. Graphene oxide was characterized by Raman spectroscopy, infrared spectroscopy (FTIR) and transmission (TEM) and scanning (SEM) electron microscopy. Results of studies on the structure of nickel and composite Ni/GO coatings deposited in a bath containing different amount of graphene oxide are presented. The coatings were characterized by scanning electron microscopy, light microscopy, Raman spectroscopy and X-ray diffraction. The adhesion of the prepared coatings to the substrate was examined by the scratch method. The microhardness of the coatings was measured using the Vickers method on perpendicular cross-sections to the surface. Corrosion tests of the coatings were investigated using the potentiodynamic method. The influence of graphene oxide on the structure and properties of composite coatings deposited from baths with different content of graphene oxide was determined.

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Composite coatings with nickel matrix and graphene as dispersed phase

Cited by 10 publications

References 25 publications

Reduction of Graphene Oxide Using an Environmentally Friendly Method and Its Application to Energy-Related Materials

Reduction of Graphene Oxide Using an Environmentally Friendly Method and Its Application to Energy-Related Materials

Production and Properties of Composite Electrochemical Coatings With Electrochemically Dispersed Graphene Based on Nickel Matrix

Archives of Metallurgy and Materials

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