78results about How to "Good conductive path" patented technology

The invention discloses a silicon-carbon composite cathode pole piece of a lithium ion battery. The silicon-carbon composite cathode pole piece comprises a cathode current collector, wherein one silicon-carbon cathode active material layer coats the surface of the cathode current collector; the silicon-carbon cathode active material layer is prepared from the following components by mass percent: 80%-99.5% of a silicon-carbon composite material, 0%-15% of a graphene conductive agent, 0%-15% of a carbon nano tube conductive agent, 0%-15% of a carbon black conductive agent and 0.2%-20% of a binding agent. Furthermore, the invention discloses a preparation method of the silicon-carbon composite cathode pole piece. According to the silicon-carbon composite cathode pole piece and the preparation method of the silicon-carbon composite cathode pole piece, disclosed by the invention, the silicon-carbon composite cathode pole piece can be used for effectively improving the conductive property of a silicon-based material and guaranteeing low impedance and long cycle life of the lithium ion battery applied by the cathode pole piece; the whole properties of the lithium ion battery are greatly improved, and long-time use requirements of electronic products can be met; and a market application prospect of products of battery manufacturers can be improved easily.

The invention provides a nano-composite material with a molybdenum trioxide@molybdenum disulfide core-shell heterostructure, and a preparation method and an application thereof. The preparation methodcomprises the following steps: adding sodium molybdate and hydrochloric acid into redistilled water, used as a reaction solvent, in a closed high-temperature and high-pressure reactor, heating the reaction system to produce a high-temperature and high-pressure environment in order to prepare a nano-ribbon molybdenum trioxide precursor, adding the nano-ribbon molybdenum trioxide to redistilled water used as the reaction solvent, adding thiourea and hydrochloric acid, and heating the reaction system to generate high-temperature and high-pressure environment in order to prepare the three-dimensional porous sheet molybdenum oxide-molybdenum disulfide core-shell heterostructure nano-composite material. Compared with nano-composite materials in the prior art, the nano-composite material in theinvention has the advantages of high purity, good and controllable dispersibility, low production cost, good reproducibility, large specific surface area, facilitation of the infiltration of an electrode material with an electrolyte, and great potential application values in the energy storage field.

A method for manufacturing a lithium secondary battery includes a first step of dispersing a conductive material in a solvent to prepare a conductive slurry; and a second step of mixing the prepared conductive slurry, a positive electrode active material and a binder to prepare a positive electrode mixture layer-forming slurry; wherein the first step is conducted so that a ratio of a particle size at 10% accumulation to a particle size at 90% accumulation, which are based on a particle size distribution measurement of the conductive material, is 10 or more and 200 or less.

The invention relates to a method for improving thermoelectric properties of bismuth sulfide polycrystal and belongs to the technical field of energy materials. The method is characterized by comprising the following steps of: mixing bismuth sulfide nano powder prepared by a mechanical alloying method with (001)-oriented monocrystal bismuth sulfide nanorod powder synthesized by a hydrothermal method, ultrasonically dispersing in absolute ethanol for 10-200 minutes, drying and then manually grinding in an agate mortar for 10-100 minutes; and placing ground powder in a graphite mold, sintering at 300-500 DEG C by adopting a spark plasma sintering process, and maintaining the temperature for 0-30 minutes to prepare a bismuth sulfide polycrystal block. Because the spark plasma sintering process has high heating rate, thus the growth and fusion of crystals are inhibited, the monocrystal nanorod structure is retained in the polycrystal block to form a fast channel for carrier migration, and the electric transmission performance and thermoelectric property of the bismuth sulfide polycrystal are greatly improved; and the method has the advantages of simplicity in required equipment, easiness in operation, low cost, significant effect and the like.

The invention discloses a preparation method of a lithium iron phosphate cathode material and the lithium iron phosphate cathode material. The preparation method comprises the steps as follows: lithium iron phosphate is prepared by a solid-phase synthesis method; the solid-phase synthesis method comprises ball-mill mixing and high-temperature calcination; acetylene is introduced into an inert atmosphere during calcination; and carbon nano tubes are formed in generated lithium iron phosphate particles and among the lithium iron phosphate particles to obtain the lithium iron phosphate cathode material with high conductivity. According to the preparation method, a chemical vapor deposition method for the carbon nano tubes is ingeniously combined with the solid-phase synthesis method of the lithium iron phosphate; the carbon nano tubes are gradually deposited on the surfaces of the lithium iron phosphate particles along with synthesis of the lithium iron phosphate during high-temperature calcination; a three-dimensional conductive path is formed in the particles and among the particles; and the conductivity of the cathode material is improved. According to the method, the lithium iron phosphate and the carbon nano tubes are crossly generated in a same reaction container, so that the process is simplified; the carbon nano tubes are evenly distributed; and the quality of the lithium iron phosphate cathode material is improved.

The invention provides a water-soluble self-healing binding agent, a preparation method thereof and a lithium ion battery. The water-soluble self-healing binding agent is provided with a general formula shown in specification formula (I). In the water-soluble self-healing binding agent, quadrupolar hydrogen bonds having favorable reversibility are contained in a molecule structure, can be reversely broken under external simulation such as an external force or a temperature and are generated again after the external simulation disappears, certain mechanical strength is shown, the water-solubleself-healing binding agent has favorable self-heating performance, great probability is provided for preparing a self-preparing material, the water-soluble self-healing binding agent can be used as abinding agent of a silicon or silicon carbon negative electrode of the lithium ion battery, so that the prepared lithium ion battery has favorable electrochemical performance.

The invention discloses a composite foam film and a preparation method thereof. Nano-particles are used as a filler, a polymer is used as a base material, the nano-particles are dispersed in a solution of the polymer, and then curing film formation and freeze-drying treatments are carried out to prepare the nano-particle/polymer composite foam film with a light, soft and porous structure and an electromagnetic shielding property. The addition of the nanoparticles increases the pore size of the composite foam film, improves the conductive pathway of the composite foam film and significantly improve the electrical conductivity and the electromagnetic shielding property of the composite foam. The composite foam film prepared in the invention has a great application scenario in the field of electromagnetic shielding.

A non-aqueous battery with improved volume energy density and enhanced load characteristics is made available even when using olivine-type lithium phosphate as a positive electrode active material.

The non-aqueous electrolyte battery of the present invention is provided with a positive electrode (1) containing lithium iron phosphate as a positive electrode active material, a negative electrode (2), and a non-aqueous electrolyte (4). In the positive electrode (1), a positive electrode active material-containing layer that is made of the positive electrode active material, a conductive agent, and a binder agent is formed on a positive electrode current collector. The positive electrode current collector has a thickness of less than 20 μm and its surface that is in contact with the positive electrode active material-containing layer has a mean surface roughness Ra of greater than 0.026.

An recycled composite material is disclosed, which is prepared by using as a raw material a waste composite material which comprises a matrix component and carbon fibrous structures added to the matrix, and adding an additional matrix component which is homogeneous and/or heterogeneous with the matrix of the spent composite material, and then kneading them together; wherein the carbon fibrous structure comprises a three dimensional network of carbon fibers, each carbon fiber having an outside diameter of 15-100 nm, and a granular part, at which the fibers are bound in a state that the carbon fibers extend outwardly therefrom, and wherein the granular part is produced in a growth process of the carbon fibers. The recycled composite material performs much the same with the original composite material, and is produced briefly at a low cost.

The invention discloses a cobweb-shaped flexible strain sensor capable of identifying a strain direction and a preparation method. The method comprises the following steps of mixing a conductive filler, a hot-melt adhesive and an N, N-dimethylformamide solvent, and carrying out ultrasonic dispersion to obtain a dispersion liquid, putting the granular thermoplastic polymer into a screw extruder, and extruding a pure thermoplastic polymer wire, drawing the wire material to pass through the dispersion liquid at a constant speed by utilizing a wire winding roller traction device, forming a uniformand thin conductive layer on the surface of the wire material, and printing the wire material into a cobweb-shaped array by utilizing a 3D printer after the wire material is completely dried, and fixing the wire at the center of the cobweb and the tail end of the longitudinal wire by using conductive silver adhesive to prepare the cobweb-shaped flexible strain sensor. The cobweb-shaped customizedstructure is rapidly prepared, and the sensor also has the function of identifying the strain direction, has the advantages of high linearity, high sensitivity, wide strain range, rapid response, lowhysteresis, good stability and the like, and has great potential in the application of wearable equipment.

Objects of the present invention is to provide a carbon nanohorn aggregate excellent in imparting conductivity, and to provide a carbon nanohorn aggregate excellent in both the impartation of conductivity and the dispersibility. The present invention provides a fibrous carbon nanohorn aggregate in which a plurality of single-walled carbon nanohorns are aggregated in a fibrous state. The fibrous carbon nanohorn aggregate is excellent in imparting conductivity, and can be produced by the same process as production of globular carbon nanohorn aggregates, whereby the carbon nanohorn aggregates containing fibrous ones and globular ones mixed therewith can satisfy both high conductivity and high dispersibility.

The invention discloses a method for preparing a lithium ion battery silicon-carbon anode material by using a carbon nanotube. The method of the invention comprises dispersing and fixing the carbon nanotube and carbonizing a precursor. The method shortens and disperses the carbon nanotube by high-speed emulsification shearing. A dispersing agent keeps the carbon nanotube in a highly dispersed state, thereby solving the problem that the carbon nanotube is difficult to disperse and easy to agglomerate. By freeze drying, an organic carbon source fixes the highly dispersed carbon nanotube/nanosilicon. The carbon nanotube/nanosilicon is coated with carbon after the carbonization by the organic carbon source so as to achieve a purpose of efficiently preparing the lithium ion electronic silicon-carbon anode material from the carbon nanotube. The method of the invention is environmentally friendly and reproducible, is simple and easy, and low in equipment requirement and low in energy consumption, and can achieve large-scale production.

The invention provides a paper-based supercapacitor electrode material preparation method, which belongs to the technical field of new energy materials. Paper becomes an important electrode material substrate due to own characteristics and is widely applied to various flexible energy storage devices. A screen printing method is used to print colloidal graphite on the paper, the paper is then immersed in a carbonate solution and a nitrate solution in sequence, an electrochemical method is adopted for processing, and the colloidal graphite forms a partially-stripped flake structure. Polypyrroleis then deposited by in-situ polymerization, and finally, through naphthalene sulfonic acid doping, a paper-based supercapacitor electrode material with a thickness of 0.15 millimeter is obtained. Thepreparation method has the advantages of simple process, low device requirements and industrial production, and when the paper-based supercapacitor electrode material is applied to the supercapacitor, the specific capacity is high, the stability is good, the conductivity is high, and industrial production of a high-performance supercapacitor is facilitated.

The invention discloses a preparation method and application of conductive aggregate, relates to the technical field of intelligent cement-based composite materials, and aims to solve the problems that direct introduction of a carbon-based nano material is difficult to disperse in a cement matrix, and the developed intelligent cement-based composite material is usually at the cost of sacrificing working performance and mechanical performance. The method comprises the following steps: grafting calcium ions to the surface of the fine aggregate, and then continuously mixing the fine aggregate with a graphene oxide solution under a heating condition to obtain the fine aggregate with the surface coated with graphene oxide; and carrying out high-temperature reduction treatment and microwave reduction treatment on the graphene oxide, and reducing the graphene oxide into graphene in situ to obtain the graphene-coated aggregate. And finally, mixing the conductive graphene aggregate, cement and water to form a stable conductive aggregate structure in the cement-based composite material. According to the prepared conductive cement-based composite material, the technical barrier that mechanical properties and electrical properties cannot be obtained at the same time is overcome under the condition that nano materials with extremely low doping amount are used. The method is applied to the field of conductive cement-based materials.

According to example configurations herein, a leadframe includes a first conductive strip, a second conductive strip, and a third conductive strip disposed substantially adjacent and substantially parallel to each other. A semiconductor chip substrate includes a first array of switch circuits disposed adjacent and parallel to a second array of switch circuits. Source nodes in switch circuits of the first array are disposed substantially adjacent and substantially parallel to source nodes in switch circuits of the second array. When the semiconductor chip and the leadframe device are combined to form a circuit package, a connectivity interface between the semiconductor chip and conductive strips in the circuit package couples each of the source nodes in switch circuits of the first array and each of the multiple source nodes in switch circuits of the second array to a common conductive strip in the leadframe device.

The invention relates to the technical field of graphene, in particular to multifunctional graphene foam and a preparation method thereof. The preparation method comprises the following steps that a graphene film is soaked in a reaction solution, external force is applied to assist the reaction solution to keep the reaction solution in a flowing state, and after a reduction reaction is conducted for a certain time, microwave drying treatment and heat treatment are sequentially conducted, so that the multifunctional graphene foam is obtained. According to the preparation method provided by the invention, a mode of soaking in a reaction solution to generate gas is adopted, so that a foam product with larger thickness and an intact structure can be obtained. The foam has a porous and fluffy microstructure, and layers are crosslinked together to form a network shape, so that the structural stability of a foam product can be ensured, a very good heat-conducting and electric-conducting channel is provided, and the foam has excellent heat-conducting and electric-conducting functions and the like.

The invention provides a dual-safety device with ground wire connection. The dual-safety device is characterized in that two parallel strain shunt bars are installed at a ground wire between an overhead ground wire suspension clamp or strain clamp and a damper. The first segments of the strain shunt bars are sheet type pre-twisted wiring harnesses twisted on the ground wire, wherein the twisting directions of the pre-twisted wiring harnesses are identical with the twisting direction of the wire strand of the ground wire; and the second segments of the strain shunt bars are cylindrical wiring harnesses and bifurcates and extends from the ground wire at the suspension clamp or strain clamp side, and wiring terminals are compressed at the tail ends and the tail ends are connected to towers bybolts. According to the invention, fusing of a lightning conductor by lightning currents and ground short-circuit currents; a phenomenon that the armour clamp is burned and broken by continuous low discharging because of poor contact can be avoided; and accident occurrence caused by ground wire falling under the condition of armour clamp string or ground wire breaking is avoided. The dual-safetydevice can be installed in an electrified manner; erecting of a crossing rack is avoided; the grid line breaking risk is reduced quickly; and the operation and maintenance costs are lowered substantially.

The invention relates to a power transistor, and the transistor at least comprises a substrate, a buffer layer and a barrier layer; a gate electrode, a source electrode and a drain electrode which are located above the barrier layer; wherein one or more insulated isolation structures are arranged in a conducting channel below the gate electrode and between the source electrode and the drain electrode. The invention also relates to electronic equipment comprising the power transistor.

The invention discloses a graphene anticorrosive coating, which is prepared from the following components in percentage by mass: 40 to 60 percent of polyurethane, 0.1 to 0.5 percent of graphene powder, 1 to 3 percent of aniline, 10 to 20 percent of zinc powder, 5 to 10 percent of a filler, 0.5 to 2 percent of a dispersing agent, 5 to 10 percent of a curing agent, 0.5 to 2 percent of a leveling agent, 0.5 to 2 percent of a defoamer and 10 to 20 percent of deionized water, wherein the zinc powder is flake zinc powder, the particle size of the zinc powder is 300-500 meshes, and the particle sizeof the graphene powder is 300 meshes. The invention also discloses a preparation method of the graphene anticorrosive coating. By adopting the graphene anticorrosive coating and the preparation methodthereof, the problem of poor anticorrosive effect of an existing anticorrosive coating can be solved.

The invention provides a conductive silver adhesive, and a preparation method and application thereof. The conductive silver adhesive comprises a silver nanosheet and a low-modulus high-molecular polymer carrier, wherein the low-modulus high-molecular polymer carrier comprises a low-modulus high-molecular polymer and an organic solvent, and the elastic modulus of the low-modulus high-molecular polymer is smaller than 100 MPa; the organic solvent accounts for 60-80% of the total weight of the high-molecular polymer carrier; and in terms of the gross weight of the silver nanosheet and the low-modulus high-molecular polymer, the silver nanosheet accounts for 70-90%, and the low-modulus high-molecular polymer accounts for 10-30%. According to the invention, the low-modulus high-molecular polymer is used as a binder for the conductive silver adhesive, and is adapted to the modulus of a flexible circuit, and polymers with different moduli can satisfy demands of flexible circuits with different moduli; and under the condition of large strain, the two-dimensional silver nanosheet in the conductive silver adhesive can still maintain a good conductive path, so the conductive silver adhesivehas high tensile properties and electrical conductivity.

The invention discloses a bacteriostatic carpet fabric and a preparation method thereof, and relates to the technical field of textile materials. The preparation method comprises the following steps of performing enzymolysis on a carpet fabric to prepare a pretreated carpet fabric; then performing a mixing reaction on nanosheet layer zinc oxide and a dopamine aqueous solution to prepare pretreated zinc oxide; etching the pretreated zinc oxide with a sodium methyl silicate solution to prepare modified zinc oxide; mixing the modified zinc oxide and the pretreated carpet fabric, and performing freeze drying to prepare a bacteriostatic carpet fabric blank; and finally, taking the bacteriostatic carpet fabric blank as a negative electrode and a platinum sheet as a positive electrode, carrying out electrodeposition in a mixed electrolyte solution, and performing filtering and drying to obtain the bacteriostatic carpet fabric. The bacteriostatic carpet fabric prepared by the method has the long-acting bacteriostatic activity, and is relatively good in wear resistance and good in hand feeling.