Introduction of few-layer graphene powder

Overview of few-layer graphene

The few-layer graphene inherits the original crystal structure and characteristics of natural flake graphite; it has a large shape ratio (diameter/thickness ratio) and excellent electrical, thermal and mechanical properties. Has excellent electrical conductivity, lubrication, corrosion resistance, high temperature resistance and other characteristics. The specific surface of the few layers of graphene is 400～700㎡/g, and the thickness is 0.55～3.74nm. Graphene has a high specific surface. It is easy to be uniformly compounded with other materials such as polymer materials and form a good compound interface.

Few layer graphene applications

Few layers of graphene, as an excellent basic material for the preparation of industrial-scale functional composite materials, will play an extremely important role in the new round of industrial revolution. Graphene flakes attached to inorganic nanoparticles can effectively prevent these flakes from being stacked repeatedly during the chemical reduction process? It can also promote the formation of a new class of materials with graphene as a carrier. Graphene-inorganic nanocomposites show excellent performance These excellent properties can be widely used in emission displays, sensors, supercapacitors, batteries, catalysis and other fields, which can significantly improve the performance of nanomaterials, so that the most promising application materials in nanotechnology can be widely used in industrial applications.

 Few-layer graphene has great application value in the energy field, and has great application value in hydrogen storage, natural gas storage, supercapacitors, and lithium battery applications. Single-layer/few-layer graphene with fewer defects in structure is currently the most widely used negative electrode material for commercial lithium-ion batteries; and defect-rich, few-layer graphene is currently the main electrode material for supercapacitors. In the application of supercapacitors, the large specific surface area of the few layers of graphene is conducive to the high dispersion of nanoparticles, and the excellent conductivity is conducive to the transfer of electrons from the nanoparticles to the graphene matrix during the electrochemical process, which can effectively inhibit the super The passive film phenomenon formed by agglomeration occurs during the electrochemical cycle of the capacitor, which improves the cycle performance of the electrode material. Using graphene to replace traditional graphite materials in lithium-ion batteries will greatly increase the lithium storage capacity of the negative electrode, thereby increasing the energy density of lithium-ion batteries; in addition, when graphene is used as the negative electrode material of lithium-ion batteries, lithium ions are in the graphene material. The diffusion path is relatively short and the conductivity is high, which can greatly improve its rate performance. In terms of hydrogen storage, when some atoms (such as transition metals, alkali metals) are first adsorbed on the surface of a few layers of graphene, the adsorption The charge transfer occurs between the increased atom and the substrate, which changes the local charge density, thereby greatly increasing the adsorption capacity of graphene for hydrogen.

Graphene-based composite materials: Graphene-based polymer composite materials are an important direction towards practical applications of graphene. Since graphene has excellent performance and low cost, and the functionalized graphene can be processed by conventional methods such as solution processing, it is very suitable for the development of high-performance polymer composite materials. The conductive percolation threshold of conductive plastic prepared from graphene microchips is much lower than that of ordinary conductive fillers, which overcomes the shortcomings of ordinary graphite fillers, and has broad applications in plastic conductive, antistatic materials, and radar absorbing materials. Compared with other inorganic nanofillers, a significant advantage of graphene in improving the mechanical properties of polymer composites is that even a very low content can greatly improve the mechanical properties of nanocomposites.

Thermally conductive glue, thermally conductive polymer composite materials, thermal interface materials, and heat dissipation materials: The few-layer graphene nanosheets themselves have very high thermal conductivity and can be used as additives to composite materials to greatly improve the thermal conductivity of the matrix material. The material has great application value.

Excellent catalytic material and catalytic support material. Few layers of graphene can be used as an ideal catalyst support, and the metal/graphene system will provide a brand new model catalysis research system for surface catalysis research. Few-layer graphene can also form controllable chemical defects through surface functionalization, such as surface hydroxyl groups, carbonyl groups, epoxy groups, etc. These chemical defects can serve as nucleation centers for metal growth to achieve the purpose of controlling metal growth. For example, the carbon holes and oxygen-containing functional groups on the surface of graphene can disperse and stabilize sub-nano Pt clusters, so that the graphene-supported Pt catalyst exhibits better catalytic performance than carbon black-supported Pt catalysts in methanol oxidation and other reactions. . Because graphene has excellent electrical conductivity, thermal conductivity, and structural stability, and at the same time, the electronic modification effect of graphene on the supported metal catalyst, the graphene-supported catalytic system will exhibit many special catalytic activities. Graphene will have important applications in heterogeneous catalysis. The use of functionalized graphene as a catalyst may realize a metal-free catalytic process, which provides an effective way to solve the problem of reducing and replacing precious metal catalysts in heterogeneous catalysis. In addition, the heterogeneous catalytic system supported by graphene also exhibits some unique properties.

High-temperature lubricating materials: Graphene nanosheets have the characteristics of corrosion resistance and high temperature resistance, and there is super-lubricity with almost zero friction between the few layers of graphene sheets. The root cause is mainly the characteristics of the surface of the few layers of graphene materials. Atomic arrangement, the atomic arrangement on the graphene surface resembles a convex hexagonal empty eggshell. When the surface slides in a specific direction, these protrusions may be staggered with each other, so that there is almost no friction on the surface. It can be used as a high-temperature lubricating material. Lubricant additives.

 In addition, graphene nanosheets have broad application prospects in electromagnetic shielding materials, advanced conductive inks, high-strength engineering plastics and other fields, as well as in the defense industry, aerospace industry, automobile industry, communications industry and energy industry.

The price of few layers of graphene

The price of few-layer graphene will vary randomly with factors such as production costs, transportation costs, international conditions, exchange rates, and supply and demand in the few-layer graphene market. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for few-layer graphene, please feel free to send an inquiry to get the latest price of few-layer graphene.

Few layer graphene supplier

As a global supplier of few-layer graphene, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced engineering materials. The company has successfully developed a series of powder materials (including oxides, carbides, nitrides, single metals, etc.) high-purity targets, functional ceramics and structural devices, and provides OEM services.