Synthesis of graphene <i>via</i> electrochemical exfoliation in different electrolytes for direct electrodeposition of a Cu/graphene composite coating

Mao, Xinyu; Zhou, Liqun; Liu, Huicong; Chen, Haining; Ju, Pengfei; Li, Weiping

doi:10.1039/c9ra06541e

Cited by 16 publications

(3 citation statements)

References 34 publications

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“…The results of FTIR spectroscopy indicated the presence of oxygen functional groups in the EEG flakes ( Figure 2 c). The characteristic peaks in the FTIR spectrum at 3423, 1635, and 1049 cm −1 corresponded to the hydroxyl, carboxyl, and alkoxy groups, respectively [ 45 , 46 , 47 ]. The chemical structure of the EEG paper was investigated by XPS.…”

Section: Resultsmentioning

confidence: 99%

Interlayer Separation in Graphene Paper Comprising Electrochemically Exfoliated Graphene

Nguyen

Lim

et al. 2021

Nanomaterials

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The emergence of graphene paper comprising well-stacked graphene flakes has promoted the application of graphene-based materials in diverse fields such as energy storage devices, membrane desalination, and actuators. The fundamental properties of graphene paper such as mechanical, electrical, and thermal properties are critical to the design and fabrication of paper-based devices. In this study, the interlayer interactions in graphene paper were investigated by double cantilever beam (DCB) fracture tests. Graphene papers fabricated by flow-directed stacking of electrochemically exfoliated few-layer graphene flakes were mechanically separated into two parts, which generated force-displacement responses of the DCB sample. The analysis based on fracture mechanics revealed that the interlayer separation energy of the graphene paper was 9.83 ± 0.06 J/m2. The results provided a fundamental understanding of the interfacial properties of graphene papers, which will be useful for developing paper-based devices with mechanical integrity.

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Section: Resultsmentioning

confidence: 99%

Interlayer Separation in Graphene Paper Comprising Electrochemically Exfoliated Graphene

Nguyen

Lim

et al. 2021

Nanomaterials

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“…The prominent D peak is an indicator of a structural defect and functionality on the surface coming from oxygenation of graphitic carbons during the electrochemical exfoliation process [61]. The Raman spectrum of the synthesized EEG showed the structural similarity to the some other electrochemically exfoliated graphene materials in the literature [32,62,63]. Moreover, the number of layers of graphene can be estimated by the shape and intensity of the 2D peak.…”

Section: Raman Analysesmentioning

confidence: 99%

Scalable activated carbon/graphene based supercapacitors with improved capacitance retention at high current densities

İnal¹

2021

Turk J Chem

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Scalable, highly stable supercapacitor electrodes were developed from the mixture of a tea factory waste based activated carbon (AC) and a low-cost electrochemical exfoliated graphene (EEG). The hybrid electrodes showed notably enhanced stability at high current densities. The AC sample was prepared by chemical method and exposed to a further heat treatment to enhance electrochemical performance. Graphene used in the preparation of hybrid electrodes was obtained by direct electrochemical exfoliation of graphite in an aqueous solution. Detailed structural characterization of AC, EEG, and hybrid material was performed. The original electrochemical performances of AC and EEG were examined in button size cells using an aqueous electrolyte. The hybrid materials were prepared by mixing AC and EEG at different mass percentage ratios, and tested as supercapacitor electrodes under the same conditions. Capacitance stability of the electrodes developed from AC:EEG (70:30) at high currents increased by about 45% compared to the original AC. The highest gravimetric capacitance (110 F/g) was achieved by this hybrid electrode. The hybrid electrode was scaled up to the pouch size and tested using an organic electrolyte. The organic electrolyte was preferred for scaling up due to its wider voltage ranges. The pouch cell had a gravimetric capacitance of 85 F/g and exhibited as good performance as the coin cell in the organic electrolyte.

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“…The electrodeposition technique offers many advantages such as ease of implementation, no need for expensive equipment, and near ambient conditions [19]. Although many studies concern the deposition methods and mechanical characterization of Copper-Graphene composite coatings [20][21][22][23][24], metal-GnP composites need further investigation. The tribological performance of coatings depends on several parameters and different wear mechanisms occur concomitantly [25].…”

Section: Introductionmentioning

confidence: 99%

Mechanical characterization of functional Cu-GnP composite coatings for lubricant applications

Baiocco

Menna

Rubino

et al. 2022

Surface Engineering

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Composite coatings have increasingly been used to improve the wear resistance of materials or protect surfaces from wear. Graphene nanoplatelets (GnPs) allow exploiting both the carbon allotropes and nanomaterials properties to reduce friction. In this study, electrodeposition of Cu-GnP composite coatings was realized to improve the tribological behaviour of copper plates. Two grades of GnPs were exploited to produce self-lubricating coatings, investigating how the GnP size affects the tribological performance. The characterization was performed through profilometry and microscopy (SEM-EDS) to assess their morphology, in addition to wear tests to define the mechanical properties. The results proved that the dimensions of GnPs, which are width and thickness, greatly affect the morphological and tribological properties of the coatings.

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Synthesis of graphene via electrochemical exfoliation in different electrolytes for direct electrodeposition of a Cu/graphene composite coating

Abstract: Electrochemically exfoliated graphene was directly dispersed in the DMF/H2O solution for electrodeposition of a Cu/graphene composite coating.

Cited by 16 publications

References 34 publications

Interlayer Separation in Graphene Paper Comprising Electrochemically Exfoliated Graphene

Interlayer Separation in Graphene Paper Comprising Electrochemically Exfoliated Graphene

Scalable activated carbon/graphene based supercapacitors with improved capacitance retention at high current densities

Mechanical characterization of functional Cu-GnP composite coatings for lubricant applications

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