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Graphene living in a stronger material world

3D graphene boosts new batteries beyond lithium ion

In relative terms, graphene has the highest level of heat and electrical conductivity, protects against ultraviolet rays, and is the strongest material ever measured. ...These properties have made graphene an attractive potential material for a variety of applications, particularly for transportation-related uses, and especially for automotive engineering. ...The Role of Graphene in Achieving e-Mobility in Automotive Applications reviews the current state of graphene-related automotive applications, it also identifies the technological challenges facing engineers that look to benefit from graphene’s attractive properties.

To satisfy demand, we have developed a graphene Hall sensor that senses magnetic fields by the Hall effect. The sensitivity of a Hall sensor is proportional to the carrier mobility, and graphene has an extremely high carrier mobility compared with conventional materials like Si, GaAs and InSb. ...The sensitivity of a Hall sensor is proportional to the carrier mobility, and graphene has an extremely high carrier mobility compared with conventional materials like Si, GaAs and InSb. ...The sensitivity of a Hall sensor is proportional to the carrier mobility, and graphene has an extremely high carrier mobility compared with conventional materials like Si, GaAs and InSb. Thus, graphene Hall sensors are expected to give high sensitivity that will enable sensing of the Earth’s magnetic field.

In the case of polypropylene, a polyolefin presents in the automotive industry with fiber reinforcement, it is possible to achieve significant improvements in structural and functional properties, by nanometric inclusions of graphene particles. The addition of graphene enhances its mechanical properties while adding useful life and lightness, making it an interesting option for the sector. ...A material allied to these alternative technologies is graphene, few layers (usually up to 6) of Carbon atoms arranged in a hexagonal and crystalline form in a two-dimensional plane lattice. ...From this innovative and sustainable perspective, achieving weight reduction for structural and non-structural applications, increasing the useful life of materials, and more efficient battery charging requires finding an alternative material capable of filling this gap, with graphene being an excellent candidate to perform the improvement generation of electric vehicles, as lightweight construction and efficiencies will continue to be one of the decisive requirements for electric vehicles.

The present research work focuses on the development of Graphene filled (CB) Styrene-Butadiene Rubber (SBR) and its performances are compared with Carbon Black (CB) filled SBR. ...It is observed from the results that the inclusion of graphene in SBR improved its vibrational characteristics in addition to the improvement of mechanical properties.

High barrier level is reached by reinforcing the coatings with inorganic fillers such heavy metal, nanoparticles, silica, and now more recently, carbon-based materials, like graphene and its derivatives. Graphene combined with additives presented in the paint composition can act as a passive physical barrier between the corrosive environment and the metal surface, restricting the diffusion of corrosive agents across the metal surface. ...In this work we provided a general view about the potential use of anticorrosive protective coatings based on graphene composites in epoxy resins in the automotive industry. We evaluated the state-of-the-art of some recent advances in the scientific and patent research databases in the last 10 years, as well as the existing commercial products available in the market. ...Finally, positive and negative points of view were observed in the use of graphene composites in coatings, such as the possibility of producing waterborne paint, which causes a reduction of potential polluting materials present in paint compositions.

All tested cases confirm that graphene layer substantially reduces corrosion rate compared with the samples with no graphene coating. ...Currently, various thin metallic layers such as gold (Au), silver (Ag), or tin (Sn) are plated with a nickel (Ni) layer on copper alloy (Cu) terminals to ensure reliable electrical conduction during service. Graphene due to its excellent chemical stability can serve as a corrosion protective layer and prevent electrochemical oxidation of metallic terminals. ...In this work, effects of thin graphene layers grown by plasma-enhanced chemical vapor deposition (PECVD) on Au and Ag terminals and thin-film devices were investigated.

These nanostructures of 1D, such as nanowires, nanotubes and nanorods, present great potential for enhancing photon absorption, electron transit, and electron collection in solar cells. Graphene is a 2D hexagonal lattice of carbon atoms that is atomically thin. The remarkable mechanical properties of graphene are due to its structure, in which each carbon atom shares three of its four electrons in covalent bonds with its nearest neighbours (sp2 bonds). ...The remarkable mechanical properties of graphene are due to its structure, in which each carbon atom shares three of its four electrons in covalent bonds with its nearest neighbours (sp2 bonds). ...At the same time, the remaining fourth electrons are delocalized across the two-dimensional lattice in an orbital that accounts for the majority of the material’s optoelectronic capabilities. Also, Graphene is noted for having mobility that exceeds that of good metals. Furthermore, since a number of solution-based techniques, such as simple spin coating, may be used to create thin films of graphene a range of compositions can be created utilising low-cost, straightforward, and large-scale processes.

This work aims to develop a PA6 nanocomposite with glass fiber (GF) and graphene nanoplatelets (GNPs) focusing on automotive parts application. Polyamide 6 is a semi-crystalline polymer that exhibits high fatigue and flexural strength, making it viable for rigorous applications. ...Among the fillers of nanocomposites are graphene nanoplatelets, which stand out in nanocomposites due to their easy and safe inclusion in polymer matrices, as can be seen in recent studies on the toxicity of GNPs, where it was found that graphene is much safer than carbon black for large-scale use, this being a positive point regarding the application of GNPs. ...Among the fillers of nanocomposites are graphene nanoplatelets, which stand out in nanocomposites due to their easy and safe inclusion in polymer matrices, as can be seen in recent studies on the toxicity of GNPs, where it was found that graphene is much safer than carbon black for large-scale use, this being a positive point regarding the application of GNPs.

We have previously shown that plasma-enhanced chemical vapor deposition (PECVD) of graphene on gold (Au) and silver (Ag) terminals can significantly reduce the insertion force (friction force during the terminal insertion process). ...In this study, reduced graphene oxide was prepared using a low-cost solution process and applied onto metallic terminals. ...The reduced graphene oxide (rGO) suspended in polyalphaolefin (PAO) base oil was coated on Sn terminals via a dip-coating method.

The main challenge faced was the highly corrosive nature of copper, which was overcome by coating it with Graphene Oxide (GO) by the electrophoretic deposition process. Tests were performed using three EGR coolers made of stainless steel, copper, and GO-coated copper.

Abstract Using an ultrasonic-assisted stir casting method, a pure aluminum (Al) matrix (99% purity) was mixed with Graphene Nanoplatelets (GNPs) in various proportions ranging from 0.5 wt.% to 2.0 wt.% to create a Metal Matrix Composite. ...The microstructural and mechanical behavior of pure Al-graphene composites were studied experimentally, and it was discovered that Al with 1.0 wt.% graphene composite exhibits improved mechanical properties, with a 38.80% increase in tensile strength and a 56.07% increase in microhardness. ...According to the failure review, uniform graphene scattering in the parent matrix combined with negligible porosity resulted in a substantial improvement in mechanical properties, making it ideal for aerospace applications.

Two different TEM (Transmission Electron Microscopy) grids - graphene oxide (GO) and silicon nitride (SiN) - were used to capture the particulates emitted with the exhaust of a modern 1.0 L GDI (Gasoline Direct Injection) engine. ...The overall aim was to understand if additional benefits can be obtained by analysing the particles captured in the exhaust on a nanoporous silicon nitride grid compared to state-of- the-art graphene oxide grids. The behaviour of porous SiN support films was of interest since nanopores are present in the grid in the 20 nm regime and the material is thermally and dimensionally stable under high temperatures, allowing thermophoretic capture directly within the engine exhaust stream.

The results show that the SnO2 nanospheres with a diameter of 5.68 nm are embedded in the framework of graphene and activated carbon, the mass ratios of SnO2 to carbon have a significant effect on the properties of the composites.

Polymer composites reinforced with the "wonder material" graphene could cut structural weight by a third or more, researchers claim.

The carbon atoms recombine into graphene sheets in the hydrogen atmosphere.

Recently, graphene has attracted both academic and industrial interest because it can produce a dramatic improvement in properties at very low filler content. ...This review will focus on the latest studies and recent progress in the swelling resistance of rubber compounds due to the addition of graphene and its derivatives. This work will present the state-of-the-art in this subject area and will highlight the advantages and current limitations of the use of graphene for potential future researches. ...This work will present the state-of-the-art in this subject area and will highlight the advantages and current limitations of the use of graphene for potential future researches.

This research emphasizes the flax-based composite, developed using the hand lay-up method and augmented with three distinct graphene nanofillers. The graphene fillers are categorized as large nanorods (dimensions 3-5 nm, lengths 150-300 nm), small nano threads (dimensions 6-12 nm, lengths under 50 nm), and spherical particulates (dimensions 29-39 nm). ...Thermal conductivity evaluations of the composite, integrated with different graphene configurations, recorded enhancements ranging from 0.22 W/mK to 0.286 W/mK at a 2 wt.% graphene concentration. At an elevated 4 wt.% graphene addition, the small rod-shaped fillers demonstrated an impressive 59.6% enhancement over the flax/epoxy baseline, while the larger rod and spherical graphene nanoparticles showcased a 22.14% enhancement. ....% inclusion of spherical graphene nanoparticles is particularly effective in enhancing the ultimate tensile strength and fracture elongation of the epoxy matrix, registering improvements of 10% and 29% respectively.

Bringing it all together Ian Adcock catches up with GKN's newly appointed president, Group Technology, Rob Rickell. Graphene Supreme Ian Adcock discovers what role graphene is likely to play in the vehicles of tomorrow.