Graphene coating on nickel as effective barriers against hydrogen embrittlement

Fan, Yuanjun; Huang, Yanghong; Cui, Bai; Zhou, Qin

doi:10.1016/j.surfcoat.2019.06.044

Cited by 17 publications

(6 citation statements)

References 51 publications

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“…Therefore, the 3DIGN in 3Di Gr-Cu composite can function as an effective barrier to atomic hydrogen. In contrast, PM Cu is not capable of blocking atomic hydrogen; hence, the corrosion reaction was accelerated by the diffusion of atomic hydrogen at the cathode [25]. In the results shown in Figures 6(b) and (c), before and after the HAC experiment, the PM Cu exhibits more corrosion than the 3Di Gr-Cu composite.…”

Section: Hydrogen-assisted Corrosion (Hac)mentioning

confidence: 93%

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Electrochemical Corrosion Resistance and Electrical Conductivity of Three-Dimensionally Interconnected Graphene-Reinforced Cu Composites

Li¹,

Choi²

2021

Korean J. Met. Mater.

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A three-dimensionally interconnected graphene-reinforced Cu (3Di Gr-Cu) composite was synthesized using a simple two-step process technique which involves the mechanical compaction of micronsized Cu particles followed by chemical vapor deposition (CVD) at 995 ℃. The microstructural properties of pure Cu and the 3Di Gr-Cu composite were investigated by optical microscope, scanning electron microscope, and X-ray diffractometer. The electrical and corrosion behaviors of the 3Di Gr-Cu composite and Cu only, prepared by powder metallurgy (PM Cu), were studied and compared. The electrical conductivity (EC) of the 3Di Gr-Cu composites was found to be 38.8 MSm<sup>−1</sup> at a carbon content of 73 ppm, and exhibited a 12% higher EC than the PM Cu. Due to the interconnected graphene around the Cu grains, the corrosion current density and corrosion rate of the 3Di Gr-Cu composite decreased by 29% and 40%, respectively, compared to the PM Cu. The EC of the 3Di Gr-Cu composite depended on the carbon content. The improvement in the EC of the 3Di Gr-Cu composite is attributed to the electron-carrying ability of the three-dimensionally interconnected graphene network (3DIGN) formed at the grain boundaries in the composite. The enhancement in corrosion resistance is due to the impermeability of graphene to various chemical species.

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Section: Hydrogen-assisted Corrosion (Hac)mentioning

confidence: 93%

“…Every 2 min, the specimen was removed, washed with DI water, dried, and weighed to determine the weight loss as a function of time. A higher weight loss indicates a higher HAC [25]. At least five samples each from the PM Cu and 3Di Gr-Cu composite were tested for corrosion, and the average values were used for the analyses.…”

Section: Corrosion Testsmentioning

confidence: 99%

Electrochemical Corrosion Resistance and Electrical Conductivity of Three-Dimensionally Interconnected Graphene-Reinforced Cu Composites

Li¹,

Choi²

2021

Korean J. Met. Mater.

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“…Graphene has been explored for hydrogen barrier application to prevent embrittlement and oxidation of metals in industry and nuclear reactor applications [ 46 , 47 , 48 ]. It has also been investigated for hydrogen storage, typically at high pressures and very low temperatures [ 49 ].…”

Section: Recent Advances In Hydrogen Permeation Barriersmentioning

confidence: 99%

Recent Advances and Prospects in Design of Hydrogen Permeation Barrier Materials for Energy Applications—A Review

2022

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The hydrogen infrastructure involves hydrogen production, storage and delivery for utilization with clean energy applications. Hydrogen ingress into structural materials can be detrimental due to corrosion and embrittlement. To enable safe operation in applications that need protection from hydrogen isotopes, this review article summarizes most recent advances in materials design and performance characterization of barrier coatings to prevent hydrogen isotopes’ absorption ingress and permeation. Barriers are crucial to prevent hydride formation and unwanted hydrogen effects to increase safety, materials’ lifetime and reduce cost for applications within nuclear and renewable energy. The coating may be applied on a material that requires protection from hydrogen pick-up, transport and hydride formation in hydrogen storage containers, in pipelines, spent nuclear fuel storage or in nuclear reactors. While existing, commercial coatings that have been much in use may be satisfactory for various applications, it is desirable to evaluate whether alternative coating concepts can provide a greater resistance to hydrogen isotope permeation along with other improved properties, such as mechanical strength and thermal resistance. The information presented here is focusing on recent findings within the past 5–7 years of promising hydrogen barriers including oxides, nitrides, carbon, carbide, MAX-phases and metals and their mechanical strength, hydrogen pick-up, radiation resistance and coating manufacturing techniques. A brief introduction to hydrogen permeation is provided. Knowledge gaps were identified to provide guidance for material’s research prospects.

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“…The greatest challenge is the retention of electrical conductivity upon stretching [ 28 , 29 ]. Moreover, the CVD-synthesized graphene has a polycrystalline nature [ 30 , 31 ], and the presence of grain boundaries results in a significantly higher resistance in the graphene film than in the ITO film. Chen et al previously employed AgNWs to minimize the high sheet resistance of the polycrystalline graphene film; however, the exposure of AgNWs to ambient moisture and oxygen resulted in their oxidation [ 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

Graphene/Silver Nanowires/Graphene Sandwich Composite for Stretchable Transparent Electrodes and Its Fracture Mechanism

Huang

Chen

et al. 2021

Micromachines

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Polycrystalline graphene grown by chemical vapor deposition (CVD) is characterized by line defects and disruptions at the grain boundaries and nucleation sites. This adversely affects the stretchability and conductivity of graphene, which limits its applications in the field of flexible, stretchable, and transparent electrodes. We demonstrate a composite electrode comprised of a graphene/silver nanowires (AgNWs)/graphene sandwich structure on a polydimethylsiloxane substrate to overcome this limitation. The sandwich structure exhibits high transparency (>90%) and excellent conductivity improvement of the graphene layers. The use of AgNWs significantly suppresses the conductivity loss resulting from stretching. The mechanism of the suppression of the conductivity loss was investigated using scanning electron microscopy, atomic force microscopy, and lateral force microscopy. The results suggest that the high surface friction of the sandwich structure causes a sliding effect between the graphene layers would produce low crack or hole formation to maintain the conductivity. In addition to acting as conductive layers, the top and bottom graphene layers can also protect the AgNWs from oxidation, thereby enabling maintenance of the electrical performance of the electrodes over a prolonged period. We also confirmed the applicability of the sandwich structure electrode to the human body, such as on the wrist, finger, and elbow.

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Graphene coating on nickel as effective barriers against hydrogen embrittlement

Cited by 17 publications

References 51 publications

Electrochemical Corrosion Resistance and Electrical Conductivity of Three-Dimensionally Interconnected Graphene-Reinforced Cu Composites

Electrochemical Corrosion Resistance and Electrical Conductivity of Three-Dimensionally Interconnected Graphene-Reinforced Cu Composites

Recent Advances and Prospects in Design of Hydrogen Permeation Barrier Materials for Energy Applications—A Review

Graphene/Silver Nanowires/Graphene Sandwich Composite for Stretchable Transparent Electrodes and Its Fracture Mechanism

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