One step electrode fabrication of thin film graphene oxide-polypyrrole composite by electrodeposition using cyclic voltammetry for hybrid type supercapacitor application

Suranshe, Saurabh S.; Patil, Awanikumar P.; Deshmukh, Tushar B.; Chavhan, Jitendra

doi:10.1016/j.electacta.2023.142277

Cited by 15 publications

(7 citation statements)

References 34 publications

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“…Ni/G0–10 exhibits the highest E corr at 50 and 80 °C, respectively, whose value was close to those of uncoated Ni foam, −0.246 and −0.294 V vs Ag/AgCl, presented in ref . The low value of Ni/G10 may be attributed to the uneven graphene deposition obtained at a constant current . The value of i corr is used to evaluate the rate at which corrosion behavior occurs .…”

Section: Resultsmentioning

confidence: 99%

“…31,32 Graphene, composed of carbon atom layers, has been widely applied in anticorrosion fields, due to its chemical stability and excellent conductivity. 29,30,33 Kumar et al 31 prepared Nigraphene composite coatings for anticorrosion applications on low-carbon steel matrix. The experiments in 3.5 wt % NaCl indicated that the addition of graphene resulted in a more compact coating structure and improved corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

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Ni/Graphene Coating for Enhanced Corrosion Resistance of Metal Foam Flow Field in Simulated PEMFC Cathode Environment

Sun,

Hu,

Cao

et al. 2024

ACS Omega

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Metal foam flow field suffers serious corrosion issues in proton exchange membrane fuel cells due to its large surface area. Ni and Ni/graphene coatings are prepared under constant and gradient current modes, respectively, to improve the corrosion resistance. The effect of the electrodeposition current mode and the deposition mechanism is studied. Compared with Ni coating, Ni/graphene coating brings low corrosion current density and high coating resistance, effectively enhancing the stability of Ni foam in an acidic environment. Different from Ni coating with a single layer, Ni/graphene deposits have core−shell structure, with graphene coated on the surface of Ni nanoparticles. It is shown that graphene deposits cover the Ni particles during the electrodeposition, which protects nickel particles from agglomeration and forms an inert film on the surface of the porous structure.After an 8 h constant potential test, no significant pitting is observed on the surface of Ni/graphene coating, showing excellent anticorrosion performance. As to the effect of the deposition current mode, it is shown that more composite particles deposit on the upper layer under the gradient current mode, which brings denser protective film and fewer surface defects on the surface. Ni/ graphene coating electrodeposited under a gradient current mode between 0 and 10 mA•cm −2 exhibits the lowest corrosion current densities. The values at 50 and 80 °C are only 62.9 and 26.0% of those of uncoated Ni foam, respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ni/Graphene Coating for Enhanced Corrosion Resistance of Metal Foam Flow Field in Simulated PEMFC Cathode Environment

Sun,

Hu,

Cao

et al. 2024

ACS Omega

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“…Here, we examine nanographite with ketamine aptamer, which has shown potential for detecting recreational drugs electrochemically, and explain recent advancements in those sensors. Graphene is a 2D honeycomb structure made up of carbon atoms arranged in a hybridized honeycomb sp2 network, and it has been gaining popularity in recent years due to its unique characteristics, including ultrathin structure, high electrical conductivity, large surface area, and high theoretical capacitance [ 11 , 12 , 13 , 14 ]. These materials have been used in nanodevices, biomedical applications, biosensors, energy materials, etc.…”

Section: Introductionmentioning

confidence: 99%

Aptasensor Integrated with Two-Dimensional Nanomaterial for Selective and Sensitive Electrochemical Detection of Ketamine Drug

Suleman,

Anzar,

Patil

et al. 2024

Micromachines

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Ketamine is one of the most commonly abused drugs globally, posing a severe risk to social stability and human health, not only it is being used for recreational purposes, but this tasteless, odourless, and colourless drug also facilitates sexual assaults when it is mixed with drinks. Ketamine abuse is a threat for safety, and this misuse is one of the main uses of the drug. The crucial role of ketamine detection is evident in its contributions to forensic investigations, law enforcement, drug control, workplace integrity, and public health. Electrochemical sensors have gained considerable interest among researchers due to their various advantages, such as low cost and specificity, and particularly screen-printed paper-based electrode (SPBE) biosensors have gained attention. Here, we reported an ePAD (electrochemical paper-based analytical device) for detecting the recreational drug ketamine. The advantages of using a paper-based electrode are that it reduces the electrode’s production costs and is disposable and environmentally friendly. At the same time, nanographite sheets (NGSs) assisted in amplifying the signals generated in the cyclic voltammetry system when ketamine was present. This ePAD was developed by immobilizing a ketamine aptamer on NGS electrodes. The characterization of proper synthesized NGSs was performed by Scanning Electron Microscopy (SEM), XRD (X-ray Diffraction), Fourier-transform infrared spectroscopy (FTIR), and UV-Vis spectroscopy. Electrochemical techniques, including cyclic voltammetry (CV) and linear sweep voltammetry (LSV), were employed to validate the results and confirm each attachment. Furthermore, the versatility of the proposed sensor was explored in both alcoholic and non-alcoholic beverages. The developed sensor showed a low LOD of about 0.01 μg/mL, and the linear range was between 0.01 and 5 μg/mL. This approach offers a valid diagnostic technique for onsite service with minimal resources. This cost effective and portable platform offers desirable characteristics like sensitivity and selectivity and can also be used for POC (point of care) testing to help in the quick identification of suspicious samples and for testing at trafficking sites, amusement parks, and by the side of the road.

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“…These functionalities are also crucial in the perspective of improvisation of the 2D structure of GO using different dopants through π–π interactions. − This modified structure further enhances its electrochemical energy storage capability when it is used in the form of a thin film as an electrode. These thin-film electrodes are fabricated using drop-casting, spraying, or spin-coating techniques. ,− The applications of GO are not only restricted to energy storage but also as proton-exchange membranes or electrolytes in energy conversion devices. Generally, it is due to the occupation of covalent and non-covalent species into the matrices of GO.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Energy Storage and Conversion Applications of Graphene Oxide: A Review

Gautam,

Kanade,

Kale

2023

Energy Fuels

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Graphene oxide (GO), a single sheet of graphite oxide, has shown its potential applications in electrochemical energy storage and conversion devices as a result of its remarkable properties, such as large surface area, appropriate mechanical stability, and tunability of electrical as well as optical properties. Furthermore, the presence of hydrophilic functionalities on basal and edge planes induces other relevant properties, which make GO an attractive material for electrochemical applications. On account of having structural diversity and enhanced overall crucial properties, GO and its composites have attracted much attention in contribution of energy storage devices, such as batteries, supercapacitors, and energy conversion devices, such as fuel cells and water electrolyzers. Previous review reports demonstrated the individual applications of GO or reduced graphene oxide (RGO) in either of the electrochemical energy devices. The present review highlights all of the recent developments of GO and RGO in both the energy storage and conversion devices along with the recent synthesis methodologies, which are crucial to unveil all of the outperforming properties of GO and RGO. The transition in the synthesis of GO with various chemical methods, including the Brodie and improved Hummers methods, to electrochemical approaches have been described with recent developments as well as highlights of the importance of electrochemical energy in the synthesis of GO. Utilization of GO in energy storage applications predominantly as electrodes and electrolytes and membranes in energy conversion devices further diversify its multiple applicability as a result of its variable functional properties. Multiple energy storage devices, such as Li-ion, Na-ion, Li−S, and flow batteries and supercapacitors, have shown the enhanced performance with the introduction of GO and RGO. Furthermore, GO has also shown excellent applicability in energy conversion devices, such as protonexchange membrane fuel cells, methanol fuel cells, and water electrolyzers, which have also been discussed in this review. This review further summarizes the recent synthesis methodologies of GO and RGO along with their importance in electrochemical energy devices with allied challenges and future perspectives.

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One step electrode fabrication of thin film graphene oxide-polypyrrole composite by electrodeposition using cyclic voltammetry for hybrid type supercapacitor application

Cited by 15 publications

References 34 publications

Ni/Graphene Coating for Enhanced Corrosion Resistance of Metal Foam Flow Field in Simulated PEMFC Cathode Environment

Ni/Graphene Coating for Enhanced Corrosion Resistance of Metal Foam Flow Field in Simulated PEMFC Cathode Environment

Aptasensor Integrated with Two-Dimensional Nanomaterial for Selective and Sensitive Electrochemical Detection of Ketamine Drug

Electrochemical Energy Storage and Conversion Applications of Graphene Oxide: A Review

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