1800 results about "Conductive paste" patented technology

The invention discloses silver-nickel conductive paste for a BC battery and a preparation method of the silver-nickel conductive paste, and belongs to the technical field of photovoltaic batteries. The silver paste comprises the following raw materials in percentage by weight: 39-69% of micron silver powder, 20-50% of modified nickel, 2-6% of glass powder, 0.1-10% of a dispersing agent, 0-1% of silicone oil and the balance of an organic carrier, the modified nickel is simple substance nickel powder subjected to modification treatment, and the modification treatment mode is surface organic modification and ball milling modification or surface inorganic modification and ball milling modification. The nickel powder is adopted to replace part of silver powder, the prepared conductive silver nickel paste is used for a BC battery, the cost is remarkably reduced, the reliability is high, and the conversion efficiency is superior to or equivalent to that of traditional all-silver electrode paste.

The invention discloses a high-solid-content single-walled carbon nanotube aqueous conductive slurry formula composition and a preparation method thereof, belonging to the technical field of conductive slurry. The raw materials include single-walled carbon nanotube powder, dispersant, dispersing aid, pH regulator and deionized water. The invention innovatively proposes to shorten the single-walled carbon nanotube powder with the aid of a three-roll grinder, grind the single-walled carbon nanotube powder, the dispersant, the dispersing aid and the like into fibers of less than 10 μm under the forward shear force of the three-roll grinder, and the van der Waals force between the shorter single-walled carbon nanotube bundles is relatively weak and easier to be opened, so that the homogenization pressure of the subsequent high-pressure microfluidizer is ≤1000 bar, and the single-walled carbon nanotubes are uniformly dispersed under a relatively low homogenization pressure. While opening the single-walled carbon nanotube bundles, the problem of damage to the length size of the carbon nanotubes under a higher homogenization pressure is avoided, thereby ensuring the conductivity of the high-solid-content single-walled carbon nanotube aqueous conductive slurry formula composition.

The invention provides conductive paste for a heterojunction solar cell and a preparation method of the conductive paste, and belongs to the field of conductive paste. The spherical nano-silver, the silver nanowires and the silver nanosheets are introduced, a three-dimensional conductive network is formed through three metal shapes, the conductivity of the paste is remarkably improved, high stability is kept in long-term use through the synergistic effect, and degradation of the conductivity is avoided; the carbon nanotubes are modified through mixed acid and a coupling agent, so that the dispersity is improved, the interface bonding force is enhanced, and the conductivity and mechanical strength of the slurry are improved; according to the graphene, the dispersity and compatibility are improved through introduction of sulfydryl, and the conductivity is restored through reduction of sodium borohydride; silver-coated silicon carbide is used as a filler to improve conductivity, retain hardness of silicon carbide, enhance wear resistance of the slurry and prolong service life; through the synergistic effect of the modified carbon nanotubes, the modified graphene and the silver-coated silicon carbide, the paste shows excellent performance in the aspects of conductivity, thermal stability and mechanical strength.

The invention discloses an electroencephalogram sensing electrode and a using method thereof.The electroencephalogram sensing electrode comprises a shell assembly, the shell assembly comprises a shell, a base and a top cover, the shell and the base are connected to form a slow-release probe containing cavity, the shell and the top cover are connected to form a liquid storage cavity, and a fluid valve, a slow-release material, a capillary hole plug, a rapid flow hole and a slow flow hole are arranged in the shell assembly; a semi-dry electrode is made by injecting conductive liquid or a wet electrode is made by injecting conductive paste, and through a fluid valve, a slow-release material, a capillary hole plug, a quick flow hole and a slow flow hole, the electrode can quickly supply liquid to the position between the electrode and the scalp to reduce resistance and slowly supply liquid to reduce resistance, and the electrode-scalp interface impedance can be quickly reduced and can be balanced and stabilized for a long time. The electrode has the advantages that the electrode can be used as a semi-dry electrode by injecting conductive liquid, can also be used as a wet electrode by injecting conductive paste, and has the functions of storing the conductive liquid for a long time without releasing the conductive liquid when the electrode is idle and supplying the conductive liquid in two modes of fast and slow to reduce scalp-electrode impedance when a user wears the electrode to acquire signals.

The invention belongs to the field of conductive paste, and discloses silver-coated nickel paste, a preparation method of the silver-coated nickel paste and a metallization method of a high-temperature sintered silicon solar cell. The conductive powder in the silver-coated nickel paste accounts for 80-95% by mass of the paste, and the silver-coated nickel paste comprises silver-coated nickel powder and micron silver powder; 1-6% of glass powder; 0.1-3% of organic resin; 0.5%-0.8% of a thixotropic agent; and 0-1% of other auxiliary agents and the balance of solvent. Wherein the conductive powder is a mixture of silver-coated nickel powder and silver powder in a mass ratio of 1: (0-50); the resistivity of the silver-coated nickel powder is less than or equal to 96 mu omega.cm, the antioxidant resistivity is less than or equal to 205 mu omega.cm, and the titrated nickel content is less than or equal to 0.01 mol / L; when the silver-coated nickel paste is used for printing a crystalline silicon solar cell on the single back side, compared with pure silver paste, the silver-coated nickel paste is slightly higher in line resistance, basically level in contact resistance and basically level in printing wet weight, the efficiency is 0%-2% lower than that of the pure silver paste after adjustment, and the silver paste can be used for replacing crystalline silicon solar cell silver paste of pure silver powder. The invention correspondingly discloses a preparation method of silver-coated nickel paste and a metallization method of a high-temperature sintered crystalline silicon solar cell.

The invention provides conductive paste, a solar cell, a preparation method of the solar cell and a photovoltaic module. The conductive paste comprises the following components in parts by weight: 70-85 parts of silver powder, 3-8 parts of glass powder, 0.1-2 parts of an additive and 12-25 parts of an organic carrier, wherein the silver powder comprises spherical silver powder and flaky silver powder; the glass powder is prepared from the following components in parts by weight: 65 to 75 parts of Bi2O3, 18 to 25 parts of TeO2 and 8 to 12 parts of V2O5; the additive is a carbon material and / or conductive metal oxide nanoparticles; the organic carrier comprises an infrared absorbing material; the infrared absorption material is selected from any one or more of copper phthalocyanine, a polyaniline-carbon nanotube compound and a tungsten oxide nanowire. The conductive paste can improve the conductivity of the conductive paste and improve the efficiency of the conductive paste in a laser sintering process, so that the contact resistivity is reduced, and the photoelectric conversion efficiency of a photovoltaic solar cell is improved.

The invention provides base metal conductive paste for a photovoltaic cell and a preparation method, a use method and application thereof, and the conductive paste comprises the following components in percentage by mass: 5-60wt% of oxide coated base metal powder, 27-77wt% of silver powder, 2-5wt% of glass powder, 0.1-3wt% of an antioxidant aid and the balance of an organic carrier; wherein the base metal powder comprises one or more of copper, tungsten, tin, nickel, aluminum and alloy powder of the copper, the tungsten, the tin, the nickel, the aluminum and the alloy powder of the aluminum, and the oxide comprises one or more of silicon oxide, aluminum oxide, titanium oxide and boric oxide. The base metal powder coated with a specific type and a proper amount of oxide is selected and matched with the oxide and the glass powder which are good in compatibility, the manufacturing cost of the conductive paste and the battery can be effectively reduced, meanwhile, the conductive paste is applied to TOPCon and BC batteries, and the battery conversion efficiency can be kept equivalent to or even superior to that of traditional pure silver conductive paste.

The utility model discloses a premixing tank for carbon nano tube conductive slurry, which comprises a cooling jacket, a kettle body is arranged in the cooling jacket, a stirring support, a liquid feeding hole, a powder feeding hole and a spraying ball assembly are arranged at the upper part of the kettle body, a stirring device is arranged in the kettle body, the stirring device comprises a low-speed helical ribbon stirrer and a high-speed shearing stirrer, a stirring shaft of the high-speed shearing stirrer penetrates through a hollow shaft of the low-speed helical ribbon stirrer and is directly connected with the high-speed driving motor, and the hollow shaft of the low-speed helical ribbon stirrer is driven by the low-speed driving motor and the speed reducer. The premixing tank solves the problems of agglomeration of carbon nanotube powder, inconsistent upper and lower uniformity, material adhesion on the kettle wall, uneven overall temperature and the like in the existing mixing tank, effectively avoids uneven mixing caused by long-term adhesion of the material on the kettle wall, can scrape off the material adhered on the kettle wall when discharging the material, reduces material residues, and improves the production efficiency. And the device can be widely applied to mixing occasions of carbon nanotubes and other slurries.

The invention discloses high-crystallinity superfine nickel powder and a preparation method thereof.The generation size of nickel powder in a liquid phase is adjusted through ultrasonic waves, molten salt heat treatment is combined to obtain the high-crystallinity superfine nickel powder, and the preparation method specifically comprises the following steps that an aqueous solution in which a nickel precursor is dissolved is mixed with a reducing agent; under the action of ultrasonic waves, an alkaline solution is added for a reaction, and nickel powder particles with the adjustable particle size are prepared; and then uniformly mixing the nickel powder with combined salts in different proportions, carrying out heat treatment at different temperatures, and cleaning and separating a cooled product to finally obtain the high-crystallinity superfine nickel powder with the size of 100-200nm. The nickel powder has good size uniformity, oxidation resistance and thermal shrinkage resistance, and can be applied to various fields such as conductive paste, metal electrodes and magnetic shielding materials.

The invention discloses a composite conductive paste transfer film, a photovoltaic electrode grid line preparation method and a photovoltaic cell, and relates to the technical field of photovoltaic cells. According to the preparation method of the composite conductive slurry transfer printing film, high-precision impressing forming, transfer printing, dissolving and other technologies are adopted for a PVA film, and composite conductive slurry is adopted, so that precise electrode design is achieved on a crystal silicon wafer. The high-precision impressing technology and the transfer printing technology are applied to preparation of the photovoltaic electrode grid line, and the precision and the resolution ratio of the electrode grid line can be greatly improved. Compared with a traditional single silver paste grid line, the use amount of silver paste can be reduced and the industrial cost can be reduced on the basis of achieving higher photoelectric conversion efficiency by using the composite conductive paste. The PVA film with proper thickness and hardness is directly used as a substrate to complete transfer printing, a conventional complex structure of a transfer printing substrate film and a water-soluble polymer coating is replaced, and the problems that the silicon wafer is damaged and the grid line structure is influenced due to the fact that the subsequent substrate cannot be easily separated from the crystal silicon wafer can also be solved.

The invention relates to conductive silver paste and a preparation method thereof, and relates to the technical field of low-temperature curing type conductive paste, the conductive silver paste comprises the following components: multi-dimensional micro-nano conductive silver powder, surface conductive type liquid metal nanoparticles, a multi-system organic resin binding phase, a closed curing agent, a mixed organic solvent and various additives; wherein the mass part of each component is as follows: the mass part of the multi-dimensional micro-nano conductive silver powder is 60-90; the mass part of the surface conductive liquid metal nanoparticles is 5-10; the mass part of the multi-system organic resin binding phase is 0.1-10; the mass part of the closed curing agent is 0.1-5 parts; the mass part of the mixed organic solvent is 5-20; the mass part of each additive is 0.1-10 parts. The bending resistance, the adhesive force and the fatigue resistance of the conductive silver paste are improved.

The invention discloses a preparation method of antioxidant graphene coated copper composite conductive paste. The preparation method comprises the following steps: step 1, preparing organic matter coated copper powder; 2, the organic matter in the organic matter-coated copper powder obtained in the step 1 serves as a solid carbon source, annealing is conducted in a vacuum environment so that graphene can grow on the surface of the copper powder, and graphene-coated copper composite powder is obtained; and 3, the graphene-coated copper composite powder serves as a conductive filler of the conductive paste, and the graphene-coated copper composite conductive paste is prepared by combining a dispersing agent, a curing agent and a defoaming agent. The high-quality graphene-coated copper composite powder is obtained by growing graphene on the surface of the copper powder through the solid carbon source in the vacuum environment, then the graphene-coated copper composite conductive paste is prepared, and the preparation method is simple; compared with pure copper conductive paste, the graphene-coated copper composite conductive paste has the advantages that the resistivity is obviously reduced, and the graphene-coated copper composite conductive paste has better oxidation resistance.

The invention belongs to the field of conductive paste preparation, and particularly discloses conductive paste containing ruthenium oxide and a preparation method of the conductive paste. The conductive paste is prepared from the following components in percentage by mass: 40 percent to 50 percent of ruthenium oxide, 3.8 percent to 5 percent of carbon nano tubes, 5 percent to 10 percent of PbO-B2O3-SiO2, 3 percent to 8 percent of ethyl cellulose, 21 percent to 28 percent of terpilenol, 9 percent to 12 percent of butyl carbitol, 0.7 percent to 1 percent of ammonium polyacrylate and 1 percent to 2 percent of dibutyl phthalate. According to the preparation method, ruthenium oxide is activated in vacuum, a mixed solvent is combined after dispersion, and a ball milling and ultrasonic dispersion synergistic process is adopted, so that the slurry is uniformly dispersed and has excellent stability. According to the invention, a ruthenium oxide-carbon nanotube-frit ternary synergistic system is constructed, and terpilenol and butyl carbitol in a specific mass ratio are taken as a mixed solvent, so that the problems of insufficient conductivity and easy agglomeration of traditional paste are effectively solved, and the method can be widely applied to manufacturing of high-precision electronic devices.

The invention is suitable for the technical field of conductive slurry preparation, and provides a conductive slurry grinding device which comprises a grinding base assembly, the grinding base assembly comprises a horizontally-arranged base, and a motor bin and a supporting arc plate are installed at the top of the base; a grinding driving assembly is arranged in the motor bin, a grinding assembly is connected to the side wall of the side, close to the supporting arc plate, of the motor bin, and feeding and discharging assemblies are arranged at the two ends of the grinding assembly. And the grinding driving assembly comprises a grinding motor which is horizontally arranged. The device solves the problems that the grinding quality and efficiency are affected due to agglomeration of conductive paste carbon nanotube powder particles during grinding, and the grinding device cannot treat conductive paste with different finenesses, and achieves the purpose that the grinding quality and efficiency are improved by improving the feeding uniformity degree and matching premixing treatment before grinding. The probability of agglomeration caused by overlarge specific surface area of carbon nanotube powder particles is reduced, and meanwhile, the distance between the grinding discs is adjusted during grinding, so that the cycle time required for grinding the conductive slurry is shortened.

The invention discloses conductive paste, a conductive electrode, a preparation method of the conductive electrode and a crystalline silicon solar cell, and belongs to the technical field of photovoltaic cells, the conductive paste comprises glass powder, silver, nickel and an organic carrier, the glass powder comprises B2O3, corrosive oxide and non-corrosive oxide, and the nickel is added to replace part of silver, so that the usage amount of silver in the conductive paste is reduced, and the cost is reduced. In addition, the molar ratio range of the corrosive oxide and the non-corrosive oxide in the glass powder is limited to be 0.7-2.6. The first passivation layer arranged on the boron diffusion emitter is opened during high-temperature sintering, and the oxidability and the flowability of the glass powder can be balanced to inhibit or delay the formation of an oxidized nickel shell on the surface of the nickel powder, so that a laser enhanced contact post-treatment process is matched; and the photoelectric conversion efficiency of the crystalline silicon solar cell is ensured.

The invention discloses multi-solvent synergistically activated low-temperature semi-sintered copper paste and a preparation method and application thereof, and belongs to the technical field of conductive paste. The multi-solvent synergistically activated low-temperature semi-sintered copper slurry comprises the following raw material components in percentage by mass: 82-88% of conductive filler, 2-3% of a resin carrier, 4-7% of an activating solvent, 4-7% of a dispersing solvent and 2-3% of a curing agent. Through cooperation of multiple solvents, full-stage activation of the copper particles is achieved, pre-connection and sintering of the copper particles before resin is completely crosslinked and cured are promoted, densification of the overall structure is improved, the insulation barrier effect of the resin is effectively avoided, the resistivity is reduced, meanwhile, inhibition of the resin on sintering of the copper particles is solved, and the service life of the copper particles is prolonged. And good balance between conductivity and interface adhesion is realized. Through resin curing, chemical bonding between the slurry and the substrate can be enhanced, a metal bond network among copper particles is expanded, and mechanical connection stability and electrical performance are guaranteed.

The present disclosure provides a low-temperature conductive paste and a raw material composition thereof, and a heterojunction cell electrode and a manufacturing method therefor. The raw material composition comprises the following components in percentage by mass: 2%-10% of a composite resin, 2%-4% of an organic solvent, 0.2%-1% of an auxiliary agent, and 85%-94% of conductive metal powder. The resin comprises a component A and a component B. The component A comprises a polyol and a blocked isocyanate. The component B comprises a curing agent and a resin. The present disclosure further provides a low-temperature conductive paste prepared from the raw material composition, a heterojunction cell electrode manufactured from the low-temperature conductive paste, a manufacturing method for the electrode, and a heterojunction cell manufactured from the electrode. The low-temperature conductive paste and the heterojunction cell electrode provided by the present disclosure have high conductivity and weather resistance.

To provide a conductive paste suitable for forming an electrode by a laser treatment process for producing crystalline silicon solar cells. A conductive paste for forming an electrode of a solar cell, comprising conductive particles (A), an organic vehicle (B), and a glass frit (C), wherein a product BGF · G of a basicity BGF of the glass frit (C) and a content G of the glass frit (C) is in a range of 0.25 to 1.45, and the content G of the glass frit (C) is in an unit of part by weight in the conductive paste when a content of the conductive particles (A) in the conductive paste is 100 parts by weight.

The invention relates to a glass frit composition comprising: a) 40 to 80 wt% of a first glass frit, and b) 20 to 60 wt% of a second glass frit, the first glass frit comprising 2 to 9 wt% of an alkali metal oxide, 1 to 5 wt% of SiO2, 8 to 20 wt% of Bi2O3, 25 to 50 wt% of TeO2, 20 to 45 wt% of PbO, 0 to 10 wt% of WO3, 0 to 5 wt% of MoO3, and 0 to 5 wt% of ZnO, wherein the weight percentage is based on the total weight of all compounds in the first glass powder; the second glass frit comprises 5 to 15 wt% of an alkali metal oxide, 5 to 12 wt% of SiO2, 8 to 20 wt% of Bi2O3, 20 to 40 wt% of TeO2, 20 to 40 wt% of PbO, 0.1 to 7 wt% of Ag2O, 0.1 to 7 wt% of a lanthanide compound, 0 to 10 wt% of WO3, 0 to 5 wt% of MoO3, and 0 to 5 wt% of ZnO, and wherein the second glass frit comprises 5 to 15 wt% of an alkali metal oxide, 5 to 12 wt% of SiO2, 8 to 20 wt% of Bi2O3, 20 to 40 wt% of TeO2, 20 to 40 wt% of PbO, 0.1 to 7 wt% of Ag2O, 0.1 to 7 wt% of a lanthanide compound; wherein the weight percentage is based on the total weight of all the compounds in the second glass powder. The invention also relates to a conductive paste containing the glass powder composition.

The present invention provides a method for preparing tin or tin alloy-coated copper powder and a low-temperature conductive paste, wherein the method comprises the following steps: S10, pretreating the surface of the copper powder to remove oxides and impurities on the copper powder surface; S20, placing the pretreated copper powder in an electroplating solution containing an organic phosphine compound additive; electroplating the copper powder using tin metal or tin alloy as an anode and copper powder as a cathode, wherein the copper powder is dispersed during the electroplating process; S30, after the electroplating is completed, filtering, washing, and drying to obtain the tin or tin alloy-coated copper powder. The addition of the organic phosphine compound in the present invention greatly improves the compactness of the tin or tin alloy coating formed on the surface of the copper powder, thereby making the prepared tin-coated copper powder or tin alloy-coated copper powder have the advantage of better oxidation resistance.

The embodiments of the present application relate to the technical field of new materials. Disclosed are a conductive paste, and a conductive film and a preparation method therefor. The conductive paste comprises a matrix resin, a composite silver powder, carbon nanotubes, and a curing agent, wherein the composite silver powder comprises a flaky silver powder having a D50 of 0.7-2.0 μm and a spherical silver powder having a D50 of 0.4-0.8 μm; the mass ratio of the composite silver powder to the matrix resin is 8:2-16:1; and the mass of the carbon nanotubes is 0.01-0.1% of the mass of the matrix resin, and the mass of the curing agent is 0.1-0.5% of the mass of the matrix resin. In the embodiments, the conductive paste has a multi-scale composite network structure after being cured, and therefore the conductive paste can respond to deformation in time and prevent crack propagation, has improved bending and tensile resistance, and still maintains good electrical properties while responding to deformation. Therefore, the conductive film prepared by using the conductive paste has good bending and tensile resistance, and still maintains good electrical properties while responding to deformation.

The invention provides low-silver-content conductive paste for a low-temperature curing HJT battery and a preparation method of the low-silver-content conductive paste, and belongs to the technical field of polymer-based electronic paste materials and HJT efficient battery materials. The low-silver-content conductive paste is composed of the following components in percentage by weight: 52-80% of micron-sized silver-coated copper ball powder, 14-42% of submicron-sized spherical silver powder, 1-3% of an organic solvent, 0.5-2% of a curing agent, 2.5-4% of resin and 0-1% of an auxiliary agent. The micron-sized silver-coated copper ball powder is spherical, and the median particle size is 4-6 microns; the submicron spherical silver powder is in a spherical shape or a sheet shape or a combination of the spherical shape and the sheet shape. The median particle size of the submicron spherical silver powder ranges from 100 nm to 900 nm. The prepared HJT conductive paste can be cured at the low temperature of 150-200 DEG C and has good conductivity, printing performance and adhesive force, the silver content in the paste is only 30-50%, the production cost of a solar cell is greatly reduced, and popularization of the heterojunction solar cell is effectively promoted.

The invention discloses a preparation process of flaky silver-coated copper powder, which comprises the following steps: S1, preparing a dispersing agent; s2, flaky copper powder is prepared; and S3, preparing the flaky silver-coated copper powder. According to the silver-coated copper powder electronic conductive paste and the preparation method thereof, the morphology, the particle size and the silver plating amount of the flaky copper powder are accurately controlled by accurately controlling the reaction and preparing an effective dispersing agent system, and meanwhile, the silver-coated copper powder electronic conductive paste capable of being sintered in the air is provided.

The invention discloses a conductive paste, a metallized substrate and a metallization process for manufacturing the metallized substrate, the conductive paste comprises metal particles, the particle size of the metal particles is 0.1-10 [mu] m, and the mass ratio of the metal particles is 80-98%; in the metallization process, a copper layer is arranged on the hole wall of a through hole or a blind hole of a substrate, then conductive slurry is filled in the hole with the copper layer, heating sintering treatment is carried out, and after heating sintering is carried out in an inert gas atmosphere at the temperature of less than or equal to 300 DEG C, metal particles can be fused to form a connection structure or a eutectic structure. A reinforcing layer can be formed between the nano metal particles and the copper layer, and the reinforcing layer is a metal bonding layer or an intermetallic compound layer. The metallization mode is suitable for a through hole or a blind hole of a glass / silicon / ceramic substrate with a high aspect ratio and a micro aperture, and the technical problems that complete filling is difficult to achieve and filling defects exist in an existing electroplating process, the electrical resistivity of conductive paste is high, and the interface bonding force is insufficient can be solved.

The invention discloses a conductive paste low-temperature laser sintering method and application thereof, and the method specifically comprises the steps: applying a low-temperature laser sintering technology to the sintering process of low-silver or silver-free conductive paste, and achieving the efficient and uniform molding of a conductive layer at a lower temperature through the control of the frequency, power density and wavelength of laser. The damage of high-temperature sintering to the material structure is avoided, the conductivity of the conductive paste is effectively improved, the use of silver is reduced, and the cost is reduced; besides, the conductive paste is modified by adding a modifier, and in practical application, the photovoltaic conductive paste with the silver content of 8.5% shows excellent conductivity after being subjected to laser-assisted sintering.

The invention relates to a conductive paste for a multiphase alloying photovoltaic cell, a preparation method and application thereof, and belongs to the technical field of photovoltaic device manufacturing, and the conductive paste comprises the following components by mass: 25-35% of silver-coated copper powder, 10-20% of silver-coated copper powder, 10-20% of copper powder, and 10-20% of copper powder. 45%-55% of composite tin alloy powder; 10%-20% of an organic carrier; the composite tin alloy powder is composed of at least two kinds of tin alloy powder with different melting points; in the sintering and curing process of the conductive paste, metallurgical bonding is formed between the silver-coated copper powder through gradient melting of the tin alloy powder with the different melting points. Silver-coated copper powder is adopted to replace pure silver to serve as a conductive main framework, and a large amount of tin alloy is combined to serve as a connecting base body. The low-cost advantage of the copper core and the excellent conductivity of the silver shell are utilized, so that the cost of the paste is greatly reduced, and meanwhile, the excellent electrical property is ensured.

The invention provides a fluid leakage sensing system and method for a marine hose, which can sense the presence or absence of fluid leakage of various types of marine hoses with high precision. A detection element (15) for forming a loop circuit (17) connected to a passive IC tag (11) is made to continuously extend in the longitudinal direction of the hose body between an inner surface layer (3) and a first reinforcement layer (4) by using a conductive rubber or a conductive paste having a resistance value that changes to a reference value or more as a result of the infiltration of a fluid (L), and the IC tag (11) is disposed on the surface of a marine hose (1). Resistance value data Dr in the loop circuit 17 when the IC tag 11 is activated by the transmission radio wave R1 transmitted from the communication device 19 is transmitted to the communication device 19 by a reply radio wave R2 transmitted by the IC tag 11 in accordance with the transmission radio wave R1 and input to the arithmetic device 20, and the presence or absence of leakage of the fluid L is determined on the basis of the magnitude of the difference between the resistance value data Dr and the reference resistance value data Dc.

The present invention provides a conductive paste of oligomeric walled nanotubes composite graphene and a preparation method thereof, comprising raw materials in the following mass ratios: 1-4% of oligomeric walled carbon nanotubes, 0.1-0.5% of graphite, 0.5-2% of a dispersion aid, 0.5-1% of a viscosity reducer, 0.1-0.5% of a conductive aid, and the balance being NMP; the dispersion aid includes a polyvinylpyrrolidone with a small molecular weight, a polyvinylpyrrolidone with a large molecular weight, and a polyaniline composite material. By adding graphene, the present invention makes use of the softer characteristics of graphene to enable the oligomeric walled carbon nanotubes to fit more closely with the cathode active material and have a wider contact area, thereby improving the conductivity of the material and the cycle performance, rate performance, etc. of the battery.

The invention relates to the technical field of lithium ion batteries, in particular to a system and method for detecting the conductivity of lithium ion battery conductive paste, comprising a detection bin, conductive paste spraying mechanisms are fixedly connected to the left and right sides of the bottom of the inner wall of the detection bin, and a detection mechanism is fixedly connected to the bottoms of the inner sides of the two conductive paste spraying mechanisms. By arranging the detection mechanism and the conductive slurry spraying mechanism, efficient and accurate detection of the conductivity of the conductive slurry of the lithium ion battery is realized, uniform spraying and accurate detection of the conductive slurry are realized through fine mechanical structure design, and meanwhile, the conductivity of the conductive slurry is accurately detected through detailed detection method steps. The standard and accuracy of the detection process are ensured, the stability and reliability of the conductive slurry in different working environments are further evaluated through conductivity performance at different temperatures, and in addition, the system also has the characteristics of high automation and intelligence.

The utility model discloses a carbon nanotube conductive paste dispersing and shearing device which comprises a base and a stirring barrel, an L-shaped mounting frame is mounted on the top of the base and located on one side of the stirring barrel, a rotating shaft is rotatably connected to the bottom side of the top of the mounting frame, and a connecting plate is fixedly connected to the bottom of the rotating shaft. A connecting rod is fixedly connected to the bottom side of the top of the mounting frame and located in the rotating shaft, the connecting rod penetrates through the rotating shaft and the connecting plate, a first fixing rod is fixedly connected to the bottom of the connecting rod, and a plurality of heaters and coolers are symmetrically and fixedly connected to the outer side of the first fixing rod at equal intervals and are vertically arranged at intervals. By means of the structure, the rotating stirring rods generate strong shearing force and impact force on slurry, physical dispersion of the slurry is achieved, in the stirring process, the heater and the cooler arranged in the middle can conduct heat exchange with the flowing slurry more effectively, uniform distribution of the temperature of the slurry is facilitated, and the production efficiency and the product quality are improved.