378 results about "Conductive composites" patented technology

The invention relates to the technical field of medical dressings, in particular to a perianal drug dressing of a multi-layer flow guide composite fabric and a preparation method and application of the perianal drug dressing of the multi-layer flow guide composite fabric. The perianal drug dressing is of a four-layer structure, a wet tissue adhesion layer is made of polydopamine modified chitosan / oxidized hyaluronic acid hydrogel, and wet-state adhesion is achieved; the drug sustained-release layer is used for dispersing mesoporous silica loaded with ciprofloxacin hydrochloride / defensin and chitosan microspheres loaded with epidermal growth factors / lonicera japonica into a polycaprolactone fiber membrane to achieve synergistic antibacterial and healing promotion; the directional flow guide layer is of a gradient wettability sandwich structure with a bionic micro-channel, and one-way rapid drainage can be achieved; the high-absorption outer layer is carboxymethyl cellulose / sodium polyacrylate composite sponge, liquid is locked efficiently, the wound surface is kept dry and comfortable, the clinical problem in perianal infection wound treatment can be effectively solved, and the treatment effect and the patient comfort are remarkably improved.

The invention discloses a flexible heat-conducting composite material with chain-shaped boron nitride and a preparation method, and belongs to the technical field of flexible electronic device heat management materials, the flexible heat-conducting composite material comprises an elastomer matrix and a magnetic functionalized boron nitride filler filled in the elastomer matrix; the elastomer matrix is polydimethylsiloxane; the magnetic functionalized boron nitride filler is prepared by modifying Fe3O4 nanoparticles on the surface of a boron nitride sheet; the boron nitride sheets form a vertically arranged chain structure in the elastomer matrix. The chained vertical arrangement of the boron nitride sheets is realized by prolonging the magnetic field treatment time, the Fe3O4 modification quantity is controlled to optimize the balance between the magnetic responsiveness and the heat-conducting property, a chained heat-conducting network connected end to end is formed, and the thermal seepage threshold value is reduced. According to the flexible composite material and the preparation method thereof, boron nitride sheets are induced to be vertically arranged through a magnetic field to form a chain-shaped heat-conducting network, so that high heat conductivity under low filler loading capacity is realized, and excellent stretchability is kept at the same time.

The invention belongs to the technical field of conductive polymer materials, and particularly relates to a three-dimensional polypyrrole conductive material and a preparation method and application thereof. The preparation method of the three-dimensional polypyrrole conductive material comprises the following steps: (1) preparing a metal copper quantum dot and graphene oxide mixed dispersion liquid; (2) adding an oxidizing agent to obtain a reaction solution; (3) adding a pyrrole monomer, and carrying out a polymerization reaction to obtain a graphene oxide / polypyrrole composite dispersion liquid; and (4) adding a reducing agent to reduce the graphene oxide to obtain the three-dimensional polypyrrole conductive material. After the metal copper quantum dots are loaded on the graphene oxide sheet layer, the graphene oxide sheet layer becomes a structure-oriented core in subsequent polymerization, and finally the stable three-dimensional conductive composite material with graphene as a framework and polypyrrole nanosheets as connection points is formed. Compared with a traditional three-dimensional material formed by overlapping and integrating a two-dimensional graphene sheet layer and a conductive nanowire / nanorod, the three-dimensional material with the structure can form an efficient conductive path more easily under the condition of low filler content.

The invention belongs to the technical field of battery preparation, and particularly relates to a secondary battery and electric equipment. The secondary battery comprises a negative pole piece, wherein the negative pole piece comprises a negative current collector and a negative active material layer arranged on at least one surface of the negative current collector; the negative active material layer comprises a main body region and a thinned region arranged at the edge of the main body region, and the thickness of the thinned region is smaller than that of the main body region; the negative pole piece further comprises an ionic conductive composite material, the ionic conductive composite material makes contact with the thinned area, and the ionic conductive composite material comprises ionic liquid and at least one of a conductive polymer and a sodium ion manganese-based layered oxide. According to the invention, the ionic conductive composite material is added into the negative electrode plate and is in contact with the thinned region, so that the effect of protecting the electrode plate is achieved, the sodium ion conductivity and capacity of the thinned region can be improved, polarization and negative electrode side potential drop in the circulation process can be slowed down, sodium precipitation and side reaction are inhibited, the loss of active sodium is reduced, and the service life of the battery is prolonged.

The invention relates to the technical field of conductive materials, and discloses a flexible conductive composite material and a preparation method and application thereof. The flexible conductive composite material comprises the following preparation raw materials: a thermoplastic elastomer, a conductive filler, cellulose nanocrystals, an inorganic salt, an organic solvent and water. According to the flexible conductive composite material provided by the invention, the Pickering emulsion is co-stabilized by the cellulose nanocrystal auxiliary conductive filler, the cellulose nanocrystal raw material is easy to obtain, biodegradable, environment-friendly and pollution-free, the Pickering emulsion is good in stability, the conductive filler is directionally enriched on an emulsion interface to form a continuous path, the bottleneck of filler dispersion is broken through, a conductive network structure is complete, and the stability of the Pickering emulsion is improved. The strain sensing response is sensitive, reversible circulation is achieved, the conductive interval is wide, the conductive seepage threshold value is about 1 wt%-2 wt%, when the addition amount of the conductive filler is 10 wt%, the conductivity is about 25 S / cm, and the conductivity is improved in a breakthrough mode.

The invention belongs to the technical field of conductive polymer materials, and particularly relates to a high-conductivity polypyrrole composite material as well as a preparation method and application thereof. According to the preparation method, sulfhydrylated graphene oxide is taken as a substrate, metal copper quantum dots are taken as an auxiliary material, pyrrole monomers are subjected to in-situ polymerization on the surface of the sulfhydrylated graphene oxide to form a nanosheet structure, and the sulfhydrylated graphene oxide is reduced to form the high-conductivity composite material taking polypyrrole and graphene as substrates. After the graphene oxide is subjected to sulfhydrylation modification, the copper quantum dots are more uniformly distributed on the surface of the graphene oxide, the stability of the metal copper quantum dots is improved, and the stability of the graphene oxide in the reduction and processing processes can be improved. The polypyrrole nanosheets in the high-conductivity polypyrrole composite material are vertically distributed on the surface of the graphene, so that the porosity of the composite material is improved, the specific surface area is increased, the mechanical property of polypyrrole is improved, and the stability of the morphology of the polypyrrole is favorably maintained in the processing process.

The invention discloses a manufacturing method of a flexible piezoresistive sensor, which comprises the steps of conductive composite material preparation, sensitive layer microstructure forming, sensor integrated assembly and the like, and is characterized in that conductive particles and an elastic polymer matrix are uniformly compounded to form an integrated sensitive layer structure; an interface problem caused by Young modulus mismatch in a traditional two-layer structure is eliminated from a material source, meanwhile, a micro geometric structure is elaborately designed and copied on the surface of the sensitive layer, and an externally applied pressure signal is ingeniously converted into effective local stress concentration. According to the structural design, the change rate of the contact area between the sensitive layer and the electrode can be amplified, so that the sensor can generate remarkable electric signal response to tiny pressure change.

The invention discloses a polyamide material with an electromagnetic shielding function, and relates to the technical field of polymer composite materials. The invention discloses a polyamide material with an electromagnetic shielding function. The conductive composite material is prepared from the following raw materials in parts by weight: 40 to 60 parts of modified polyamide resin, 20 to 35 parts of modified conductive filler, 5 to 10 parts of maleic anhydride grafted polyamide, 0.5 to 2 parts of antioxidant, 1 to 3 parts of stearic acid, 3 to 8 parts of ethylene-vinyl acetate, 5 to 10 parts of triphenyl phosphate, 10 to 20 parts of aluminum nitride, 0.5 to 1 part of dodecyl dimethyl benzyl ammonium chloride and 1 to 3 parts of silane coupling agent KH-550 hydrolysate. And 30-60 parts of a 20% silane coupling agent KH-560 ethanol solution. The polyamide material has efficient electromagnetic shielding performance and excellent mechanical strength, high shielding effectiveness under low filler content is achieved through modification design, the melt index adapts to a low-pressure injection molding process, the damp-heat aging performance is stable, the problems of contradiction between shielding and processability, mechanical deterioration and the like of a traditional material are solved, and the polyamide material is suitable for electronic module packaging.

The invention belongs to the technical field of aluminum-silicon-based metal materials, and particularly relates to a high-thermal-conductivity composite metal material and a preparation method and application thereof, and the high-thermal-conductivity composite metal material is suitable for heat dissipation requirements of 5G communication equipment, electric vehicle power batteries, spacecraft thermal control systems and the like. A nanocrystalline aluminum alloy matrix is formed by aluminum, magnesium, silicon, scandium and other metal elements, and the problems of anisotropy, obvious thermal response lag, obvious poor cycling stability, boiling critical phenomenon and the like do not exist; meanwhile, the nanocrystalline aluminum alloy matrix comprises a high-density dislocation grid, so that the overall heat transfer efficiency is further improved; in addition, a micro-channel is formed in the nanocrystalline aluminum alloy matrix, liquid metal is poured into the micro-channel to serve as a phase change working medium, and therefore the synergistic effect of active heat transportation and passive heat conduction is achieved. The catalyst layer is used for promoting evaporation-condensation circulation of liquid metal and strengthening phase change heat transfer of a liquid metal working medium; the interface bonding and wettability are enhanced, and the attachment of liquid metal and the channel wall is improved; and phase change working medium oxidation and side reaction are inhibited.

The invention belongs to the technical field of pipeline repair, and particularly relates to a nano conductive composite material pipeline repair layer health monitoring system and method based on a piezoresistive effect. The invention discloses a nano conductive composite material pipeline repair layer health monitoring system based on a piezoresistive effect. The system comprises a sensing layer, a data acquisition layer, a transmission layer, an analysis layer and an application layer, wherein the sensing layer is a graphene / carbon nanotube hybrid reinforced composite material pipeline repairing layer made of a self-sensing material; the data acquisition layer is used for acquiring signals and carrying out multi-channel acquisition, signal conditioning, A / D conversion and time synchronization; the transmission layer performs data communication through wired transmission / wireless transmission; the analysis layer performs data processing and algorithm processing including data preprocessing, trend analysis, damage identification and a positioning algorithm; and the application layer realizes user interaction and display, and performs visual interface, alarm push, operation and maintenance decision and report generation. The invention provides a nano conductive composite material pipeline repair layer health monitoring system and method based on a piezoresistive effect, and aims to solve the problems of no basis for conductive threshold design, insufficient monitoring sensitivity, incomplete system, indefinite alarm criterion, low positioning precision, low intelligent degree, high cost and the like in the prior art.

The invention relates to a conductive composite hydrogel with a bidirectional porous structure and pH response, and belongs to the field of organic polymer materials. The conductive composite hydrogel is formed by polymerizing polypyrrole, acrylic acid and poly (N-isopropylacrylamide) by adopting a two-step method. The preparation method comprises the following steps: firstly, preparing hydrogel sensitive to pH change through free radical copolymerization; then, the influence of different dopants on the morphology and conductivity of polypyrrole is researched, and the optimal dopant is selected; and finally, polymerizing pyrrole in the hydrogel prepared in advance by adopting a chemical oxidation method to obtain the conductive composite hydrogel which has a bidirectional pore structure and is sensitive to pH change. The composite hydrogel not only has a biphase porous structure and high-sensitivity pH responsiveness, but also can remarkably change along with the change of the pH value, the conductivity can be improved by 20 times under the alkaline condition, and the conductivity can be improved by nearly 200 times under the acidic condition. In addition, the composite hydrogel also shows excellent capacitive performance and electrochemical stability.

To provide a method for producing a conductive polymer dispersion liquid in which a conductive composite exhibiting excellent conductivity is dispersed, and a method for producing a conductive laminate using the dispersion liquid.SOLUTION: A method for producing a conductive polymer dispersion liquid comprises a step of adding an oxidizing agent that polymerizes a monomer forming a π-conjugated conductive polymer to a reaction liquid containing a polyanion, the monomer forming the π-conjugated conductive polymer, and an aqueous dispersion medium to cause a polymerization reaction and to form a conductive composite containing the π-conjugated conductive polymer and the polyanion, wherein a ratio represented by absorbance A at 600 nm of the reaction liquid immediately before addition of the oxidizing agent divided by a concentration C on a mass basis of the monomer contained in the reaction liquid (absorbance A / concentration C) is 90 or more and 650 or less.SELECTED DRAWING: None

The invention discloses an anti-electromagnetic interference type unmanned aerial vehicle defense matrix, which relates to the field of electromagnetism, and comprises a multi-node defense unit array which is distributed to form a three-dimensional defense network; each node defense unit is coated with the electromagnetic shielding layer, and the electromagnetic shielding layer is made of a conductive composite material; the anti-interference communication module adopts a frequency hopping spread spectrum technology and an encrypted channel; the main control system is used for dynamically distributing defense resources and monitoring electromagnetic interference intensity in real time; and the energy module provides redundant power supply for each unit. Multilayer electromagnetic shielding effectiveness is achieved, the full-band electromagnetic shielding effectiveness is larger than or equal to 50 dB through the composite structure of the metal nanofiber layer and the ferrite wave-absorbing material, the protection capacity is improved by 150% compared with that of a traditional aluminum alloy shell, and it is ensured that the system stably operates in the strong electromagnetic interference environment.

The present application belongs to the technical field of 3D printing of composite materials, and particularly relates to a continuous fiber reinforced polyhexahydrotriazine 3D printing heat-conducting composite material. The composite material uses a polyhexahydrotriazine prepolymer / heat-conducting filler mixed solution to impregnate continuous fiber filaments or tapes, adjusts the glue solution content and the filament / tape shape, removes the solvent through a heat flow channel, completely solidifies the resin, adjusts the cross-sectional shape of the consumable through a shaping mechanism, and obtains a 3D printing consumable after cooling. The printing consumable has good plasticity, can not rely on thermoplastic plastic as an adhesive, and can be printed through 3D printing technology alone to obtain a continuous fiber reinforced resin-based heat-conducting composite material. The consumable structure includes 25% to 75% of heat-conducting continuous fiber filaments or tapes in terms of volume percentage, 5% to 30% of heat-conducting fillers, and 20% to 70% of completely solidified intrinsic heat-conducting polyhexahydrotriazine resin. The 3D printing heat-conducting composite material has excellent heat-conducting, mechanical and chemical resistance, and can be degraded and recycled under special conditions.

This application relates to the field of composite materials and discloses a carbon fiber thermally conductive composite material and its preparation method. The composite material includes a thermally conductive layer comprising a first polymer matrix with a longitudinally arranged carbon fiber array along its thickness direction and filling gaps, and an adhesive interface layer disposed on the surface of the thermally conductive layer for bonding external devices. The adhesive interface layer includes a second polymer matrix and sheet-like thermally conductive fillers. Along the direction from near to far from the thermally conductive layer, the angle between the sheet-like thermally conductive filler and the surface of the thermally conductive layer decreases gradually, as does the crosslinking density of the second polymer matrix. By forming a dual-gradient structure of filler angle gradient and matrix crosslinking density gradient in the adhesive interface layer, a directional thermally conductive network is constructed, achieving efficient heat transfer between the external device and the carbon fiber array. Simultaneously, the inner rigid region resists puncture impacts from the carbon fiber ends, while the outer flexible region provides high surface adhesion for bonding the device, enhancing interface reliability.

[Problem] To provide a simple means whereby a lithium secondary battery containing a solid electrolyte can be manufactured. [Solution] One aspect of the present invention relates to a method for manufacturing a lithium secondary battery comprising a positive electrode, a negative electrode, and an electrolyte layer interposed between the positive electrode and the negative electrode and containing an electrolyte. Furthermore, this manufacturing method is characterized by comprising an electrolyte layer molding step for heating and pressurizing a lithium ion-conductive composite electrolyte containing an inorganic solid electrolyte and a mixed salt containing a first anion, a second anion, and lithium ions, thereby deforming the electrolyte into an electrolyte layer having a shape covering at least a portion of the outer periphery of the positive electrode.

This invention discloses an Al(OH)3 modified calcium sulfate whisker / epoxy resin thermally conductive composite material and its preparation method, belonging to the technical field of thermally conductive composite material synthesis methods. The method involves adding calcium sulfate whiskers to an aqueous solution of urea and aluminum sulfate octadecahydrate, and obtaining Al(OH)3 modified calcium sulfate whiskers through heating and stirring. These whiskers are then dispersed in a mixed solution of epoxy resin and a curing agent, and the Al(OH)3 modified calcium sulfate whisker / epoxy resin thermally conductive composite material is prepared by casting. The prepared thermally conductive composite material has a dense internal structure, significant thermal conductivity, and good insulation properties. It can effectively dissipate and conduct heat to maintain the normal operating temperature and performance of electronic components. When used in electronic products, it can effectively guide heat outwards, reducing the risk of overheating during electronic component operation.

The invention relates to the technical field of flexible electronic devices and conductive composite materials, and discloses a carbon nanotube assisted liquid metal dispersion method and application thereof in conductive ink and a flexible sensor. The method comprises the following steps: firstly, dispersing gallium-indium alloy and carboxyl-modified multi-walled carbon nanotubes in water in a mass ratio of 2: 1 through probe type ultrasound and water bath ultrasound respectively, then mixing the gallium-indium alloy and the carboxyl-modified multi-walled carbon nanotubes, and repeating the ultrasound process, so that liquid metal droplets are uniformly coated with the carbon nanotubes to form an LM (at) CNT composite dispersion liquid; adjusting the pH value of the dispersion liquid to 10.5-11.0, mixing the dispersion liquid with natural rubber latex, and adding super absorbent resin to prepare the conductive ink suitable for direct writing type three-dimensional printing. Through DIW printing and curing, the maximum GF value of the obtained flexible strain sensor in a strain interval of 1%-300% reaches 28, and the flexible strain sensor has resistance self-repairing performance, can accurately respond to human body part movement, and is suitable for the fields of wearable equipment, human body movement monitoring and the like.

A conductive composite material, a method of preparing the same, and a secondary battery including the same. The conductive composite material may increase the proportion of an active material when forming an electrode by chemically bonding a conductive material and a binder to each other. A method of preparing the conductive composite material comprises ionizing carbon-based particles in a predetermined polarity, ionizing PTFE particles in a polarity different from that of the carbon-based particles, and chemically bonding the ionized carbon-based particles and the ionized PTFE particles, which are ionized in different polarities, to each other.

This invention relates to the field of infrared emitting composite materials, specifically to a conductive infrared emitting composite material and its preparation method. The preparation method is as follows: AB2O is prepared. 4‑δ Spinel material; the prepared AB2O 4‑δ Spinel material, carbonaceous material, and ceramic material are mixed and then sandwiched together with carbonaceous material to form a pressed tablet. Microwave plasma discharge treatment is used to activate the infrared emission performance of the plasma elements and excite the conductivity channels, resulting in a conductive composite material with high infrared emissivity. This composite material solves the technical problems of limited infrared emission capability, single excitation method, and complex preparation method of existing composite ceramic materials, and has broad application prospects in the field of tunable photoelectric synergistic excitation of infrared radiation.

A system for manufacturing an ultra-conductive winding for an electric motor of a vehicle comprising a substrate extending along a longitudinal axis, an ultra-conductive composite (UCC) foil material having a thickness of 5-30 micrometers and overlapping a portion of the substrate, a substrate support selectively engageable with a portion of the substrate or the UCC material, and a finishing mechanism including a joining mechanism and a cutting mechanism configured to move along or parallel to the longitudinal axis.

The invention belongs to the technical field of polymer conductive composite materials, and discloses a glassy-state self-repairing electromagnetic shielding composite material and a preparation method thereof. The preparation method comprises the following steps: in a first solvent, uniformly mixing a bisacrylamide monomer and a diamine monomer, carrying out Michael addition polymerization reaction, precipitating, washing, and drying to obtain a glassy polymer with a hyperbranched structure; and in a second solvent, uniformly mixing an inorganic conductive filler with the glassy polymer, carrying out ultrasonic treatment, removing the solvent in the system, and drying to obtain the glassy self-repairing electromagnetic shielding composite material. The preparation method disclosed by the invention is simple and easy to operate, and the prepared glassy-state self-repairing electromagnetic shielding composite material not only can realize room-temperature self-repairing of mechanical properties, but also can realize room-temperature self-repairing of electrical properties, and simultaneously realizes room-temperature self-repairing of properties and functions.

This invention provides a self-driven monitoring-type uranium adsorption and recovery system, belonging to the field of radioactive wastewater treatment and resource recovery technology. The system uses a proton exchange membrane (MFC) as its basic architecture, separating the anode and cathode chambers. Its core innovation lies in the biomimetic anode in the anode chamber, a three-dimensional porous conductive composite material formed by the self-assembly and freeze-drying of graphene oxide and uranium-reducing microorganisms, possessing both high-efficiency adsorption, biocatalysis, and rapid electron transfer functions. An external circuit monitoring system collects loop current / voltage signals in real time, using current decay as an early warning indicator of adsorption saturation. The uranium recovery unit removes UO2 particles from the biomimetic anode using physical or chemical methods, achieving resource recovery, and the anode is regenerable and reusable. This system integrates adsorption, in-situ reduction, self-driven monitoring, and resource recovery, solving the problems of difficult adsorbent regeneration, lagging monitoring, reliance on external energy, and complex recovery processes in existing technologies.

The application discloses a heat-conducting composite material and a preparation method and application thereof. The heat-conducting composite material comprises silicon carbide nanowires and spherical and / or spheroid-like diamond deposited on the silicon carbide nanowires. That is, the diamond is arranged on the silicon carbide nanowires in a spherical or spheroid-like form to form a sugar-cane structure. The composite material with the appearance does not agglomerate in a polymer and has good heat-conducting performance; and a composite thermal interface material formed by the composite material and a high-molecular polymer has a thermal conductivity easy to reach a percolation threshold.

The invention provides a preparation method of an organic amine modified graphene oxide multi-protection anti-corrosion coating, which comprises the following steps: adding an organic amine compound and a graphene oxide filter cake into pure water for dispersion modification, adding titanium dioxide, mixing and stirring, filtering, and drying to obtain the organic amine modified graphene oxide multi-protection anti-corrosion coating. After spray drying, sintering to obtain the modified conductive composite filler; and uniformly dispersing the modified conductive composite filler, epoxy resin, zinc powder, a defoaming agent, a wetting agent and a flash rust agent to obtain the multi-protection anticorrosive paint. The organic amine modified graphene oxide is stably dispersed in the system and obstructs the permeation of a corrosive medium; the organic amine compound improves the crosslinking density of the modified conductive composite filler and the epoxy resin, so that the coating is more compact; a three-dimensional conductive network formed by graphene oxide is efficiently connected with zinc powder particles, so that the conductivity of the coating is improved; graphene oxide reacts with zinc to form compact zinc oxide, so that the corrosion resistance is improved.

The invention relates to the technical field of pressure-sensitive materials, in particular to a wide-range high-response pressure-sensitive material composite structure and a process optimization method. Comprising the following steps: immersing polymer particles into a conductive composite coating solution, mechanically stirring, ultrasonically dispersing, drying and curing to prepare particles with uniformly coated surfaces; the method comprises the following steps: melting particles by adopting a micro-fluidic spinning technology, extruding special-shaped cross-section fibers through a spinneret plate, stretching and shaping, and constructing a surface bulge structure. A plurality of fibers are twisted and stranded, the twisting direction is regulated and controlled to form a stable conductive net, and the periodic wavy linear single-strand pressure-sensitive wire is prepared through thermal mechanical shaping. The pressure-sensitive lines are subjected to warp and weft orthogonal weaving, butt-joint points are locally hot-pressed and fixed to form a latticed synaptic array and groove network, and the tip end is an arc-shaped micro-strain trigger area; and assembling a multi-layer functional fabric stacking structure, preparing an electrode layer, a pressure-sensitive layer and a packaging layer, and sequentially stacking the electrode layer, the pressure-sensitive layer and the packaging layer. According to the technical scheme, the range and response of the sensor in the tower can be improved.

This invention discloses a protective garment for epicondylitis of the humerus based on an antibacterial and thermally conductive composite material, belonging to the field of medical protective gear technology. It includes a forearm support and an upper arm support, which are rotatably connected by an adjusting mechanism. The upper arm and forearm sleeves are 3D printed using an antibacterial and thermally conductive composite material, which comprises a polylactic acid matrix, a graphene oxide-silver nanoparticle-carbon nanotube ternary composite filler, and phase change microcapsules, with a thermal conductivity of 1.5-4.0 W·m. ‑1 ·K ‑1 With an antibacterial rate of ≥95%, it solves the problems of poor thermal conductivity, lack of antibacterial properties, and uneven heat therapy in existing protective gear.

The invention provides a carbon-based composite conductive material, a heating element and application of the carbon-based composite conductive material in cigarette heating. The carbon-based composite conductive material is mainly prepared by generating metal nanoparticles on a carbon-based conductive composite network architecture material in situ, and the carbon-based composite conductive material has relatively high Joule thermal efficiency and relatively high heat transfer rate. The heating element comprises a conductive core layer capable of converting electric energy into heat energy and a heat conduction insulating layer capable of isolating the conductive core layer from the external environment, and the conductive core layer is composed of the carbon-based composite conductive material. According to the carbon-based composite conductive material, the heating element and the application of the carbon-based composite conductive material in cigarette heating, accurate temperature control, stable release of aerosol components and sensitive response can be achieved, meanwhile, the service life of the heating element is prolonged, and the structural characteristic requirement of a small heating body can be better met.

The invention relates to the technical field of batteries, and discloses a pole column and a forming process thereof, a battery cell cover plate assembly and a battery cell. The pole forming process comprises the following steps: stamping and blanking a conductive composite board along a Z direction to obtain a pole body; wherein the pole body comprises a first conductive section and a second conductive section; wrapping and limiting the first conductive section, and extruding and expanding the local part of one end, far away from the first conductive section, of the second conductive section along the Z direction, so that an annular flange is formed on the side wall of the second conductive section on the X-Y plane; stamping and stretching the local part of the annular flange to enable the free end of the annular flange to form a pole turnup; wherein the pole turnup comprises a first turnup and a second turnup which are connected with each other, the first turnup extends towards the direction far away from the second conductive section along the Z direction, the first turnup and the first conductive section are arranged at an interval, and the second turnup extends towards the direction far away from the first conductive section. The pole prepared by the invention can reduce heat transferred to the upper plastic, and the insulating property of the pole is guaranteed.

This invention discloses a thermally conductive composite material, a liquid-cooled module, and an electronic device, relating to the field of heat dissipation technology. The disclosed thermally conductive composite material, applied to a liquid-cooled module, comprises a thermally conductive core layer and thermally conductive outer layers located on both sides of the core layer. The amount of thermally conductive filler added to the core layer is greater than that added to the outer layers. By constructing a gradient structure of a highly filled thermally conductive core layer and a less filled thermally conductive outer layer, the thermally conductive composite material of this invention achieves a synergistic optimization of thermal conductivity and mechanical properties in liquid-cooled module applications.