46 results about "Graphene coating" patented technology

The utility model relates to lead -acid battery technical field, concretely is a kind of lead -acid battery current collector structure, including frame, recess is opened in the frame, the recess is equipped with porous carbon framework, the porous carbon framework is equipped on battery current collector main body, the battery current collector main body is attached with a layer of carbon cloth, the battery current collector main body is by surface body, aperture plate and grid three parts are composed, the grid is attached with one side graphene coating layer. The recess in the lead -acid battery current collector frame of the device is equipped with one side porous carbon framework, can increase the utilization of active material, improve the charge transfer efficiency of battery, the surface body of battery current collector main body is equipped with graphene coating layer, can significantly reduce the corrosion of surface body, improve the conductivity and current density of battery, the lead -acid battery current collector surface layer is equipped with a layer of carbon cloth, wherein carbon cloth and lead -acid battery current collector cooperate and have the charge-discharge performance and cycle life of the improvement of lead -acid battery.

A battery pack and a cover for a battery pack are provided. A battery pack according to the present invention can include a battery pack case in which an accommodation space portion is divided in which a plurality of battery modules are accommodated, the battery pack case having an open side, and a cover installed to cover the side of the battery pack case and having a graphene coating formed thereon.

This invention relates to the field of functional coatings technology, specifically disclosing a porous graphene coating, its preparation method, and its applications. The porous graphene coating is formed by applying a functional coating to the surface of a substrate and then curing it under laser irradiation. The functional coating includes a base coating and functional materials added to the base coating, including graphene, laser absorbers, and fillers. Addressing the core problem of existing graphene-containing coatings where graphene easily aggregates and is easily encapsulated by the coating matrix, resulting in low VOCs adsorption efficiency and difficulty in forming a stable porous structure, thus limiting adsorption capacity, this invention provides a porous graphene coating. By introducing laser absorbers into the coating formulation, the laser absorption capacity of the coating is enhanced. Combined with laser irradiation to achieve surface vaporization of the coating, the graphene is exposed and forms a porous structure, thereby significantly improving the coating's VOCs adsorption performance.

The utility model belongs to the heating and cooling technical field, concretely, it is a kind of high -efficient heat storage device with graphene coating, the heat storage device whole is cuboid or square structure, and the upper and lower rectangle of cuboid or square is used as frame, and multiple current collecting pipes are vertically arranged between the frame, and the heat storage unit is connected between every two opposite current collecting pipes, the heat storage unit is the fin made of metal material, and the fin is hollow to store phase change material, and the two ends of heat storage unit are connected with current collecting pipe, and the heat storage unit is hollow and connected to hollow current collecting pipe, so that a space for phase change material flow is formed, and at the same time, the input pipe and output pipe of phase change material are arranged, which is convenient for phase change material and external circulation, so as to store and release heat.

The utility model relates to the technical field of scroll compressors, in particular to a scroll compression structure for a scroll compressor and the scroll compressor, the scroll compression structure for the scroll compressor comprises a movable scroll plate, the movable scroll plate is made of aluminum alloy, and the surface of the movable scroll plate is coated with a nano graphene coating; and the static scroll plate is meshed with the movable scroll plate. According to the scroll compression structure for the scroll compressor and the scroll compressor, the problem that an existing scroll compression structure for the scroll compressor is seriously abraded can be solved.

The application discloses a kind of based on graphene coating infrared synergistic efficient composite drying method of fruit freeze-drying, the method includes the following steps: S1.fruit is in the pulsed electric field of pulse voltage 35 kV / cm below and is pretreated, and the fruit after pulsed electric field pretreatment is obtained;S2.pretreated fruit is in the electrostatic field of field intensity 30 kV / cm below and is pre-frozen, and the fruit after pre-freezing is obtained;S3.pre-frozen fruit is placed on graphene coating hot plate, and is dried under vacuum condition, and the freeze-dried fruit is obtained;The heating rate of graphene coating hot plate is 2~5℃ / min, heating temperature is 30~50℃, and drying time is 8~12 h.The fresh fruit is sequentially treated by pulsed electric field, electrostatic field assisted directional freezing treatment and graphene coating infrared heating drying process synergy, so that freeze-dried fruit nutrient retention rate is high, rehydration is good, and freeze-drying cycle is shortened by 25~45%, energy consumption is reduced by 25~40%, suitable for efficient high-quality energy-saving drying processing of fresh fruit.

The application belongs to the field of graphene composite heating material and application, and particularly discloses a graphene composite base material flexible electric heating sheet; the heating sheet is a sandwich structure, comprising upper and lower two layers of water-repellent fabric layers which constitute outer layers, a graphene composite base material coating heating strip located between the upper and lower water-repellent fabric layers, copper foil electrode strips, and power supply lines; the graphene composite base material coating heating strip is attached to the inner surface of at least one of the upper and lower water-repellent fabric layers; a plurality of graphene composite base material coating heating strips are arranged into graphene coating strips in an array with intervals, three copper foil electrode strips are arranged at the upper and lower ends and the middle position of the graphene coating strips; a fourth copper foil electrode strip is connected in series with the copper foil electrode strips at the upper and lower ends; after the copper foil electrode strips at the upper and lower ends are connected in series, the copper foil electrode strip at the middle is connected in parallel with the copper foil electrode strips at the upper and lower ends; and two power supply lines are respectively welded with the electrode connectors of the electrode strips at the middle and the two ends. The electric heating sheet prepared by the application has good heating effect.

This invention relates to the field of electronic paste preparation technology, and discloses a low sheet resistance tungsten-copper electronic paste and its preparation method, comprising the following steps: Step 1, preparing tungsten-copper composite powder: spherical tungsten powder with a diameter of 1-10 μm and copper powder with a size of 1-3 μm are mixed by mechanical mixing, with a tungsten to copper weight ratio of 3:1-6:1. Before mixing, the copper powder needs to undergo graphene coating pretreatment; Step 2, preparing an inorganic binder: the inorganic binder includes, but is not limited to, the following components: glass powder, CuO, TiO2, La2O3, Pu6O11; Step 3, preparing an organic carrier: the organic carrier includes a solvent, an organic binder, and a thickener; Step 4, preparing the tungsten-copper paste. The tungsten-copper paste of this invention has widely available raw materials, a simple preparation process, and is suitable for mass production. Although graphene, a high-priced material, is added, the amount added is small and the performance is particularly excellent, making the cost of the tungsten-copper paste of this invention far lower than that of similar foreign products, resulting in a very high cost-performance ratio.

A composite positive electrode active material having excellent or suitable adhesion and electronic conductivity (e.g., electrical conductivity) is disclosed, as well as a positive electrode comprising the composite positive electrode active material and a method for manufacturing the positive electrode. The composite positive electrode active material may include an active material core and a graphene coating coated on the active material core. The graphene coating may partially coat the surface of the active material core. The graphene coating may include graphene having a surface modified with an adhesive material.

The application discloses a kind of nanofiber composite dressings with photothermal synergistic antibacterial effect and its preparation method.The method is by in-situ growth COF is loaded on the fiber membrane, then resveratrol is loaded in COF, finally, PPrGO / RES-COF@PAN nanofiber composite dressings are prepared by drawing filtration reductive graphene oxide coating on the membrane.The PPrGO / RES-COF@PAN nanofiber composite dressings of the application has excellent photothermal performance, can synergistically exert bactericidal effect with resveratrol;At the same time, appropriate temperature rise can increase blood flow and ion diffusion rate across cell membrane, and activate heat shock protein, promote cell migration;In addition, the nanofiber composite dressings has good water vapor permeability, porosity and biocompatibility, and can effectively improve inflammation, has good application value for promoting wound healing.

The application provides a medium-voltage intelligent cable with a graphene functional layer and a preparation method thereof. The medium-voltage intelligent cable comprises, from inside to outside, a cable core, a filler layer, a wrapping tape layer, an inner liner layer, an armor layer, a graphene functional composite tape layer and an outer sheath layer. The armor layer comprises an armor base, and a graphene coating is arranged on the outer surface of the armor base. A distributed temperature measurement optical fiber is embedded in the graphene functional composite tape layer. The medium-voltage intelligent cable of the application is designed with a graphene functional layer, which significantly improves the heat dissipation effect and current-carrying capacity of the cable. The armor layer has a dual function of positioning damage and cable stress sensing, and the cable state early warning intelligence is improved. By embedding an optical fiber in the composite tape layer, cable temperature measurement response is achieved, the response time is significantly improved, and no additional independent optical unit is needed. The process is highly compatible with the existing production line, and the process cost is effectively controlled.

The application discloses a graphene coating processing method for a heat exchanger and the heat exchanger. The processing method comprises the following steps: cleaning and converting the heat exchanger, mixing and dispersing graphene material with a large piece of layer and an organic solution to prepare a negative graphene dispersion liquid, then immersing a cathode part and the heat exchanger as an anode part into the graphene dispersion liquid, applying a constant voltage with a voltage range of 25V-30V for 8-10 seconds, so that a surface of the heat exchanger is deposited with an oxidized graphene deposition film with a thickness range of 16um-17um, and the oxidized graphene deposition film is subjected to freeze-drying, finally, the heat exchanger is subjected to heat reduction treatment for 0.5-12 hours in a vacuum space or an inert gas atmosphere space and in an environment with a temperature range of 300-500 DEG C, so that the oxidized graphene deposition film is converted into a reduced graphene oxide deposition film, and a graphene coating with the effects of uniform density, strong bonding force and uniform coverage is formed on the surface of the heat exchanger, so that the heat conduction efficiency of the heat exchanger is effectively improved.

The application provides a hard carbon negative electrode material, a preparation method thereof and an application thereof in a sodium ion battery. The application first improves the density of a hard carbon precursor 1 through a hot-pressing densification treatment, so that the obtained hard carbon precursor 1 has a lower specific surface area; then sulfonated graphene is uniformly and closely coated on the surface of the hard carbon precursor 1 by means of carboxyl and sulfonic acid groups; subsequently, in a pre-carbonization treatment process, the sulfonated graphene coating layer induces the hard carbon precursor to grow along the graphene layer, and a more regular and ordered graphite-like layer microcrystalline structure layer is generated on the surface of the hard carbon precursor; finally, in a high-temperature carbonization treatment process, the carboxyl and sulfonic acid groups on the surface of the sulfonated graphene are reduced by organic acid, graphene is obtained, meanwhile, the defects on the surface of the graphene are reduced, and the first coulomb efficiency and the cycle performance of the hard carbon negative electrode material are improved.

This invention belongs to the technical field of lead-free solder powder for electronic soldering. The invention discloses a graphene-coated copper-tin composite solder powder and its preparation method. The core phase is a CuSn binary alloy powder, with a Cu content of 0.5~1.0 wt% and the balance being Sn; the D50 particle size is 15~45 μm, approximately spherical, and the loose packing density is 4.8~5.2 g / cm³. 3，壳相：少层还原氧化石墨烯，连续致密包覆层厚度 The graphene coating is 0.8~3.0nm, with a coating amount of 0.03~0.22wt% (based on the total mass of the composite solder powder). The interface is that the core phase and the shell phase are covalently bridged by silane coupling agent, with a coating integrity rate of ≥95%. The graphene does not agglomerate or fall off, and it plays a stable role in the reflow soldering process. The wettability, solder joint strength, and thermal fatigue performance of the solder powder reach or exceed those of SAC305 silver-containing solder powder. The process conditions are mild, highly controllable, and have good repeatability, making it suitable for large-scale industrial production. Moreover, the preparation process is environmentally friendly and generates no harmful waste.

This invention discloses a composite surface strengthening method combining micro-torch-assisted laser texturing and graphene coating, belonging to the field of surface engineering for mechanical parts. The method first preheats the surface of a metal substrate using a micro-torch, then laser-processes a micron-scale mesh texture on the preheated surface, followed by oil quenching. Next, a graphene coating is sprayed onto the textured surface and cured by heating. This invention achieves the integrated creation of the substrate surface microstructure and the martensitic phase transformation strengthening layer through real-time coupling of the micro-torch-assisted thermal field and laser processing, resulting in a gradient high-hardness support layer. Simultaneously, the micro-texture acts as a storage reservoir for mechanical locking and lubrication media, significantly improving the adhesion of the graphene coating and achieving self-lubricating dynamic replenishment. Testing showed that the peak surface hardness of the treated 40Cr steel reached 803 HV, the coefficient of friction was as low as 0.0766, wear was reduced by 70.6% compared to conventional quenching, and the transmission efficiency reached a maximum of 90.11%, making it suitable for heavy-duty transmission components such as gears and bearings.

The invention belongs to the field of functional medical catheter preparation, and particularly relates to an antibacterial and anticoagulant dialysis catheter with a sodium alginate-graphene oxide coating and a preparation method of the antibacterial and anticoagulant dialysis catheter. The preparation method comprises the following steps: (1) mixing a graphene oxide dispersion liquid with a sodium alginate solution, then adding a water / alcohol mixed solvent, and then carrying out ultrasonic dispersion treatment to obtain a mixed solution; (2) performing plasma pretreatment on the polyurethane dialysis catheter to obtain a pretreated catheter; (3) immersing the pretreated conduit into the mixed solution, and after dip-coating is completed, sequentially standing and drying to obtain a primary gel layer conduit; and (4) immersing the primary gel layer catheter into a cross-linking solution, and then sequentially cleaning, gradient heating and curing. Efficient antibiosis and anticoagulation are achieved through the synergistic effect of materials, the coating is firm in combination and excellent in biocompatibility, the problems of thrombus formation, infection and the like of an existing dialysis catheter can be solved, and the coating is suitable for hemodialysis vascular access.

The utility model discloses a kind of high-strength photoelectric encoder shell, belong to photoelectric encoder technical field, its technical scheme main points include photoelectric encoder shell structure, the photoelectric encoder shell structure includes alloy shell layer, the inside of alloy shell layer is provided with reinforcing layer, and the inside of reinforcing layer is provided with electromagnetic shield layer, buffer layer is arranged between the alloy shell layer and reinforcing layer, viscous elastic damping layer is arranged between reinforcing layer and electromagnetic shield layer, provide basic strength by alloy shell layer, honeycomb buffer layer is absorbed impact energy by cell collapse, reinforcing layer improves overall rigidity, three synergies resist external mechanical load, avoid internal code disc eccentricity caused by shell deformation, and form composite shielding structure by nanocrystalline soft magnetic alloy and graphene coating, block high-frequency electromagnetic interference, viscous elastic damping layer consumes vibration energy, reduce signal fluctuation caused by vibration.

The utility model discloses a novel cover extreme motor of heat dissipation structure, it includes casing, rotor subassembly, heat conduction plate and fin group. The heat conduction plate inside is equipped with strip -shaped recess and heat conduction hole, and the outside is equipped with graphene coating, and the fin is fixed in heat conduction plate through welding and has wavy texture, and the casing outer wall sets up the raised rib and the vent. The application can pass through heat conduction plate and fin group fast conduction heat, and the heat dissipation efficiency is promoted with the help of graphene coating and wavy texture, and the raised rib and the vent are utilized to optimize heat distribution and air circulation. The utility model reduces motor temperature rise significantly, prolongs the life, and simple structure and low cost are convenient for using widely.

The utility model provides a kind of solar phase change heat storage device for sunlight greenhouse and the sunlight greenhouse comprising it, it is related to sunlight greenhouse heating technical field, solve the technical problem that the temperature in northern severe cold area sunlight greenhouse is low and is not conducive to crop growth.The solar phase change heat storage device for sunlight greenhouse, including phase change heat storage plate and solar light heat conversion coating;Phase change heat storage plate is set in sunlight greenhouse rear side, and towards sunlight greenhouse front side;Solar light heat conversion coating is set in the front side surface of phase change heat storage plate;Phase change heat storage plate includes base material and phase change material filled in base material;Base material is made of perlite;Solar light heat conversion coating is made of graphene coating;Phase change material is made of paraffin wax.The utility model is by collecting solar heat and shed air heat and carries out phase change heat storage, to night in temperature self-feeding effect and carries out heat release, provides heat for sunlight greenhouse air, maintains sunlight greenhouse air temperature.

The utility model provides a kind of high pressure conductor for subway train with high conductivity, it is related to high pressure conductor technical field, the utility model includes conductor core and insulating layer, the conductor core is made of copper or aluminium with purity ≥99.99%, surface is covered with the graphene coating with thickness 0.1-1 microns, conductor core adopts multiple strand structure, each strand conductor is composed of 19 soft round filaments with diameter 0.1-0.3 millimeter, the insulating layer is high-temperature-resistant silicone rubber material, the outside of the insulating layer is provided with moisture-proof layer and protective layer, the utility model is by adopting conductor core as copper or aluminium conductor with purity ≥99.99%, and is combined 0.1-1 microns graphene coating, improves the conductivity of conductor core, and significantly prolongs the life of conductor by the antioxidant property of graphene, and the combination of insulating layer, moisture-proof layer and protective layer made of high-temperature-resistant silicone rubber can meet the high temperature, humidity and mechanical wear requirements of subway environment simultaneously, further improve the service life of high pressure conductor.

The application discloses a road surface repairing material paving machine based on a graphene anticorrosion coating and belongs to the technical field of road engineering construction equipment. The paving machine comprises a paving mechanism and a portable walking mechanism. The paving mechanism is composed of a split plug-in support frame and a paving trolley. The support frame is plugged in by longitudinal, transverse and limiting support plates and is locked by positioning pins and elastic buckles. The transverse support plates can be replaced to adapt to different paving spans. The paving trolley reciprocates on the support frame through a gear transmission device and is integrated with a material conveying and vibrating device. The portable walking mechanism adopts a split support plate and a folding support arm structure, supports folding storage and height adjustment. The core innovation of the application is that the gear sliding groove, the walking gear, the material conveying roller and the vibrator surface are all coated with a graphene modified wear-resistant anticorrosion coating doped with a RGO-2,6-diaminopyridine-Co compound. The application has the characteristics of convenient disassembly and assembly, flexible scene switching, strong width adaptability and the like. Moreover, the graphene coating significantly improves the wear-resistant anticorrosion performance and service life of the core components, and is suitable for road surface repairing construction in various scenes.

The utility model relates to a silica gel shell for bluetooth sound equipment, including bottom shell, top shell and base, top shell is connected with bottom shell, the base is assembled in the bottom of bottom shell, the inner chamber of bottom shell is assembled with the clamping mechanism, the clamping mechanism includes first gasbag, first gasbag is assembled in the bottom of bottom shell, the outside of first gasbag is evenly connected with the elbow pipe, the other end of elbow pipe is connected with triangle clamping block, the bottom of top shell is provided with the triangular groove that is matched with triangle clamping block, the outside of triangle clamping block is assembled with second gasbag, the inner chamber of triangular groove is provided with the recess that is matched with second gasbag, the inner chamber of first gasbag is filled with slow rebound memory sponge, and the sponge density is 45D and the surface is immersed with graphene coating. The silica gel shell for bluetooth sound equipment utilizes the slope cooperation of triangle clamping block and triangular groove to form mechanical limit, significantly improves the shell connection stability, and ensures the reliable sealing performance between different batches of parts.

Filtration media and methods for providing filtration are provided, including High Efficiency Particulate Air (HEPA) filtration media and HEPA filtration. The filtration media include glass fibers and a graphene coating on the glass fibers. The graphene-coated glass fibers form / define a conductive coating. The graphene-coated glass fibers maintain the particulate filtration functionality of a HEPA filter while adding an electrostatic filtration capability.

This invention discloses a method for preparing and applying an ultra-weather-resistant graphene PET coating material, belonging to the field of polymer composite materials technology. The method includes the following steps: S1: dispersing graphene oxide in a solvent, adding a modifier to perform a grafting reaction to obtain a functionalized graphene derivative; S2: performing an esterification reaction between terephthalic acid and ethylene glycol, adding the functionalized graphene derivative obtained in step S1 at the end of the esterification stage or the beginning of the polycondensation stage to disperse it in the polymer matrix; S3: performing a polycondensation reaction under the action of a catalyst, and extruding graphene PET sheets using a single-screw extruder. This invention can significantly improve the dispersibility and compatibility of graphene in a polyester matrix, induce the PET molecular chains to transform from coiled clusters to extended orientation, and reduce internal stress; the resulting material has excellent weather resistance, salt spray corrosion resistance, and a uniform matte appearance, making it particularly suitable for protective coatings on automotive windshield wiper wires.

This invention relates to the field of battery separator technology, specifically to an aramid separator with a graphene coating, its preparation method, and its application. The preparation method comprises: S1, coating an aramid slurry solution onto a PE base film, followed by coagulation bath and water treatment to form the film, and then drying to obtain an aramid base film; S2, coating the surface of the aramid base film with a graphene composite slurry, and then drying to obtain the aramid separator with a graphene coating; the graphene composite slurry includes polyvinylpyrrolidone, ethylene glycol, deionized water, and graphene powder. The aramid separator with a graphene coating consists of an aramid base film and a graphene composite coating. The graphene composite coating is coated on the surface of the aramid base film. This separator is used as a separator between the positive and negative electrodes of a lithium battery to achieve smooth lithium ion transport, inhibit lithium dendrite growth, prevent short circuits between the positive and negative electrodes, and improve the thermal stability and cycle performance of the lithium battery.

The present application relates to the field of composite materials, and particularly relates to a copper graphene composite material and a preparation method thereof.The present application provides a preparation method of the copper graphene composite material, which comprises the following steps: S1, expanding and deforming a copper pipe into a tapered pipe; S2, applying a graphene slurry to the inner and outer surfaces of the tapered pipe, and drying to obtain a tapered pipe with a graphene coating; S3, taking a plurality of the tapered pipes with the graphene coating obtained in step S2, stacking the pipes, and then rotating and rubbing the pipes to weld the pipes; and S4, extruding the welded pipes in step S3 into a block material, and then stirring and rotating the block material to obtain the copper graphene composite material.The method can simultaneously achieve the effects of high content and high dispersity of graphene.