5346results about How to "Increase the area" patented technology

The invention provides a high-temperature-resistant carbon fiber reinforced phenolic resin composite material and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out high-temperature oxidation treatment on carbon fibers; secondly, carrying out surface modification on the carbon fibers by using a chemical modifier; then mixing the modified carbon fiber, an antioxidant and a dispersing agent to prepare slurry; performing vacuum filtration on the prepared slurry, and drying to obtain a carbon fiber blank; preparing a phenolic resin infiltration solution, and impregnating the carbon fiber blank with the phenolic resin infiltration solution; and finally, carrying out mold pressing and curing to obtain the high-temperature-resistant carbon fiber reinforced phenolic resin composite The preparation method is simple in required equipment, convenient to operate, stable in process, high in production efficiency and suitable for large-scale industrial production. According to the high-temperature-resistant carbon fiber reinforced phenolic resin composite material prepared by the preparation method, the bonding property between the carbon fiber and the phenolic resin is improved, certain toughness and strength are provided, and meanwhile, the high-temperature-resistant carbon fiber reinforced phenolic resin composite material has the advantages of ablation resistance, good oxidation resistance in a high-temperature environment and the like.

The invention is applicable to the technical field of back contact solar cells, and provides a back contact solar cell, a photovoltaic module and a photovoltaic system.The back contact solar cell comprises a silicon substrate, a plurality of p-type doped regions and a plurality of n-type doped regions which are sequentially and alternately arranged on the back face of the silicon substrate in the first direction, and p-type fine grids electrically connected with the p-type doped regions; the n-type fine grids are electrically connected with the n-type doped regions, the isolation regions are arranged between the adjacent p-type doped regions and the n-type doped regions, and in the first direction, the ratio C1 of the width of the isolation regions to the width of the n-type doped regions is # imgabs0 #. And the photoelectric conversion efficiency of the solar cell is improved.

The invention discloses an activated carbon regeneration method based on ultrasonic coupling, and relates to the field of activation and regeneration. The method comprises the following steps: filling activated carbon to be regenerated into a reaction container, adding a target alkaline solution, and placing the reaction container in temperature-controlled ultrasonic equipment for oscillation treatment; adjusting the pH value of the solution in the reaction container, controlling ultrasonic waves to be uniformly distributed, discharging the solution after treatment, and flushing reactants to be neutral; transferring the reactants into an acid corrosion-resistant reactor, adding a preheated acid solution, and placing in double-frequency ultrasonic equipment for oscillation treatment; and cooling the reactor, adjusting the stirring speed, transferring the reactant after monitoring the conductivity to a set value, and carrying out flushing and vacuum drying to obtain regenerated activated carbon. According to the scheme, various pollutants on the activated carbon can be effectively removed, and the adsorption capacity and the specific surface area of the activated carbon are improved.

The invention provides a redox imidazole covalent organic framework material as well as a preparation method and application thereof, belongs to the technical field of material preparation and photocatalytic preparation of hydrogen peroxide, and aims to solve the technical problem of low activity of a current covalent organic framework in preparation of hydrogen peroxide. The preparation method of the imidazole-connected redox type imidazole covalent organic framework material comprises the following steps: respectively reacting a reactant 2, 7-di-tert-butylpyrene-4, 5, 9, 10-tetraketone monomer with 4, 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ', 4', 4 ' The preparation method comprises the following steps: mixing 4, 4 '-(pyridine-2, 4, 6-triyl) tribenzaldehyde and a tri (4-formylphenyl) amine monomer, adding a solvent and a catalyst, uniformly stirring, and reacting to obtain the redox type imidazole covalent organic framework material after the reaction is finished. The application comprises the following steps: adding the covalent organic framework, oxygen and the sacrificial agent into water, and reacting under the irradiation of visible light. The preparation method is green, environment-friendly, simple and easy to implement, the prepared material has good thermal stability, and efficient visible light photocatalysis preparation of hydrogen peroxide can be achieved; meanwhile, the catalyst can be recycled and has good photocatalytic stability.

The invention relates to the technical field of unmanned ships, and discloses an unmanned ship with a gravity center self-adaptive adjusting device, which comprises a supporting floating body, a gravity center self-adaptive adjusting device, a gravity center self-adaptive adjusting device and a gravity center self-adaptive adjusting device, the driving mechanism is used for providing necessary power for the catamaran; the cross beam mechanism is used for connecting and supporting the floating body and a main body of the ship. According to the unmanned ship with the gravity center self-adaptive adjusting device, the gravity center shifting mechanism is arranged, when the gravity center self-adaptive adjusting device detects that the operation environment of the unmanned ship is gentle, the bottom platform can descend through the telescopic cylinder, the bottom platform drives the vertical connecting plate and the middle floating body to move downwards, and therefore the area, making contact with water, of the middle floating body is increased; therefore, the wet surface area of the ship can be enlarged, frictional resistance can be fully reduced during high-speed operation, and when the gravity center self-adaptive adjusting device detects that the operation environment of the unmanned ship is severe, the battery can be driven to regulate and control the gravity center, the speed can be properly reduced, and operation safety is kept.

The invention provides a preparation system and method of porous electrode carbon. The system mainly comprises a two-section temperature-variable carbonization fluidized bed and an activation fluidized bed. According to the method, small-particle-size polymer particles are softened in the carbonization process and bonded with a large number of heat carrier particles to form composite particles, so that self bonding and excessive growth are avoided, and controllable carbonization is achieved in the two-section temperature-changing carbonization fluidized bed; and introducing the composite particles into an activation fluidized bed, carrying out high-temperature activation, and removing the heat carrier to obtain the porous carbon electrode carbon particles. According to the method, adhesion of polymer particles during carbonization is avoided, the problem of instability of superfine particle fluidization operation is solved, the links of grinding and heating and cooling are reduced, and the method has the advantages of being low in cost and capable of being continuously operated.

The invention relates to the technical field of sodium ion batteries, in particular to a sodium ferric sulfate positive electrode material and a preparation method and application thereof. The preparation method of the sodium ferric sulfate positive electrode material comprises the following steps: obtaining a carbon foam substrate; weighing raw materials according to the stoichiometric ratio of the sodium ferric sulfate positive electrode material, and adding the raw materials into a solvent to obtain a mixed solution; depositing the mixed solution on a carbon foam substrate by adopting an electrostatic spray deposition method to obtain a precursor film; and sintering the precursor film to obtain the sodium ferric sulfate positive electrode material. According to the preparation method, the carbon foam is adopted as a substrate material, the sodium ferric sulfate precursor is prepared through electrostatic spray deposition, and then the sodium ferric sulfate material is obtained through sintering treatment, so that the specific discharge capacity, the rate capability and the cycle performance of the sodium ferric sulfate material are all remarkably improved.

The invention belongs to the technical field of laser processing, and particularly relates to a method for manufacturing a titanium alloy through wire powder coordinated multi-mode laser coupling additive manufacturing, and the method comprises the steps of base material pretreatment, multi-mode coupling laser construction, additive manufacturing, surface strengthening and the like. According to the titanium alloy part manufacturing device and method, material conveying is conducted in the mode that wire feeding and powder feeding are combined, structures with large areas in parts are rapidly manufactured through wire feeding, fine structures are manufactured through powder, and the titanium alloy parts can be efficiently manufactured in a high-precision mode. In the additive manufacturing step, multi-mode coupling annular laser is adopted, annular flat-topped pulse laser can accelerate flowing of a liquid phase before solidification, so that dendritic crystal arms formed through solidification in advance are broken to form new crystal nucleuses, then an equiaxed crystal structure is formed, and the strength and plasticity of the titanium alloy are improved. The annular flat-topped pulse laser can accelerate stirring of the molten pool, the heat mass conveying rate in the molten pool is increased, the element segregation phenomenon is relieved, and finally a uniform and stable titanium alloy structure is obtained.

The invention belongs to the technical field of material preparation, and aims to solve the problems of interface separation and weak oxidation resistance under complex working conditions caused by insufficient interface bonding force of the existing carbon / carbon composite material. In order to achieve the purpose, the invention provides a carbon / carbon composite material and a preparation method thereof. The carbon / carbon composite material comprises the following components in percentage by mass: 40%-55% of polyacrylonitrile-based carbon fibers, 10%-25% of pitch-based carbon fibers, 8%-20% of nano silicon dioxide grafted carbon fibers, 8%-20% of biological pitch, 8%-15% of nano graphene modified phenolic resin, 3%-6% of silicon carbide whiskers, 2%-4% of zirconium boride nanoparticles, 2%-4% of graphitized carbon fibers and 1%-3% of a natural plant extract antioxidant. The carbon / carbon composite material provided by the invention can provide stable interface bonding force and remarkable oxidation resistance, so that the structural integrity and mechanical property stability of the material when bearing various complex stresses such as stretching, compression, bending, shearing and the like are guaranteed, and the application range of the material in the field of high-temperature oxidation resistance is widened.

The invention relates to the technical field of catalysts for gas purification, in particular to a hierarchical pore metal-based catalytic adsorbent as well as a preparation method and application thereof. The invention discloses an integrated preparation method combining a sol-gel method and a template method, which comprises the following steps of: adding a template agent before forming gel, adding a proper amount of ammonia water in an aging process, accurately controlling other reaction conditions and a raw material ratio, and controlling a spatial confinement effect of the template method and a chemical reaction in a sol-gel process to obtain a sol-gel composite material. The morphology and size of the catalytic adsorbent can be accurately regulated and controlled, the hierarchical pore metal-based catalytic adsorbent with a microporous structure as a main material and mesopores and macropores as coexistence is finally prepared, the hierarchical pore structure provides rich adsorption sites and catalytic activity centers, and the hierarchical pore metal-based catalytic adsorbent has high adsorption capacity, high selectivity, good catalytic activity, good stability and easy regeneration.

The invention relates to the technical field of plastic recycling, and discloses a PET bottle body label removing device which comprises a machine body, pretreatment mechanisms for pretreating bottle body labels are arranged on the two sides of the outer wall of the machine body correspondingly, and softening mechanisms for softening the bottle body labels are arranged outside the pretreatment mechanisms. A discharging mechanism for conveying pretreated bottle bodies out is arranged on one side of the outer wall of the machine body, the bottles can be flattened before entering the label removing machine through extrusion of an extrusion plate and exhaust thorns, the flattened bottles can make contact with the area of blades of the label removing machine larger than the area of the flattened bottles which are irregularly shaped after being recycled, and therefore the label removing machine is more convenient to use. And meanwhile, in order to prevent the situation that residues exist at the positions, with mucilage glue, of the sticking positions of the labels when the blades scrape the labels, the brush can rotate while the bottles are flattened, a spray head can spray out liquid for softening the labels, and therefore the blades of the label removing machine can better scrape the labels.

The invention relates to the technical field of nano catalytic materials, in particular to a preparation method and application of a nano bowl-shaped molybdenum-doped metal cobalt phosphide catalyst. The preparation method comprises the following steps: S1, preparing CoMo-MOF; S2, preparing Mo-CoP; according to the application method, the nanometer bowl-shaped molybdenum-doped metal cobalt phosphide catalyst is applied to the process of catalyzing water electrolysis hydrogen absorption and oxygen absorption reaction. According to the preparation method, the Mo-doped metal organic framework is adopted as a precursor, the target catalyst is prepared through phosphating and calcining, due to the fact that the valence state of Co in cobalt phosphide is improved through molybdenum doping, the intrinsic catalytic activity of the catalyst is improved, and electrolysis of water can be effectively catalyzed.

The invention discloses a cover plate assembly and a battery, and relates to the technical field of batteries, the cover plate assembly comprises a cover plate, a pressing ring and a pole, and the cover plate is provided with a mounting hole arranged in a front-back penetrating manner along the thickness direction of the cover plate; the pole is arranged in the mounting hole in a penetrating manner; the pressing ring is arranged on the front side of the cover plate and sleeves the pole, and the pressing ring is welded and fixed with the peripheral side of the pole; the width of the pressing ring is W, the thickness of the pressing ring is H1, the diameter of the pole is D, and the area of the front end face of the pole is S. By controlling the width W of the pressing ring and the diameter D of the pole, the pressing ring can provide enough welding area, and the welding mark can reach enough connection width, so that stable connection between the pole and the pressing ring is ensured; by controlling the thickness H1 of the pressing ring and the area S of the front end face of the pole, the welding mark can reach enough connection depth, the connection force of the welding mark is improved, and the problem of welding failure of the pole and the pressing ring is effectively avoided.

The invention discloses a polypeptide derivative with a GCGR, GIPR and GLP-1R triple targeting agonistic effect as well as a preparation method and application of the polypeptide derivative, the polypeptide derivative is shown as a formula (I), (II) is a branched chain modification structure of a peptide chain, and the group definition is detailed in the specification. The polypeptide derivative compound and the pharmaceutically acceptable salt thereof provided by the invention can be used for treating metabolic related diseases such as diabetes mellitus, weight loss, MASH and the like, cardiovascular and cerebrovascular diseases and / or neurodegenerative diseases. Tyr-Aib-Gln-Gly-Thr-Ph-Thr-Ser-Asp-Tyr-Ser-Xaa12-Xaa13-Leu-As-Lys-Xaa17-Ala-Gln-Xaa24-Xaa25-Leu-Leu-Xaa28-Gly-Ala-Pro-Pro-Ser-NH2 (I) # imgabs0 #

The invention relates to the field of sponge materials, and provides an antibacterial degradable sponge material and a preparation method thereof. The material is prepared from protocatechuic acid modified quaternized chitosan, quaternary ammonium salt grafted gelatin, sodium alginate, polyhydroxybutyrate, polycaprolactone, a polylactic acid-glycolic acid copolymer, hexamethylene diisocyanate, a foaming agent, nano cellulose, vitamin E, polyethylene glycol, triethylamine and dimethylformamide. Protocatechuic acid and quaternized chitosan are subjected to amidation modification, and chitosan and gelatin are subjected to quaternization treatment by adopting 2, 3-epoxypropyl trimethyl ammonium chloride, so that the antibacterial property and biodegradability of the material are improved. In the material preparation process, through vacuum degassing, foaming vacuum degree and humidity control and a multi-step drying process, it is ensured that the average pore size of the material is uniform (50-200 microns) and the porosity is high (50%-90%), and the obtained material has excellent antibacterial property and degradability and has wide application value.

The invention discloses an insertion part and an endoscope, and relates to the field of medical instruments. The insertion part comprises an insertion tube, a front end assembly and a first driving mechanism, the insertion tube is provided with a first channel, the first channel penetrates from the near end of the insertion tube to the far end of the insertion tube, and the front end assembly is provided with a device mounting part, a second channel penetrating through the front end assembly and an opening formed in the side wall of the far end of the second channel; the device installation part partially shields the first channel, the second channel is communicated with the first channel, the opening is located in the side, away from the device installation part, of the second channel, and the bottom of the opening extends to the near end of the device installation part. And the driving mechanism can drive the device mounting part to deflect so as to increase the area of the opening in the axial direction of the insertion part. According to the arrangement, the area of the opening can be increased, the influence of the device mounting part and the camera module mounted on the device mounting part on the cross sectional area of the first channel is reduced, the flow of the insertion part is increased, and the use effect and the working efficiency of the insertion part are improved.

The invention discloses a small tandem wing unmanned aerial vehicle folding mechanism which comprises a pair of front wings, a pair of rear wings, a pair of vertical empennages and a fuselage, the front wings and the rear wings are in tandem wing layout on the fuselage after being unfolded, and in a folding state, the pair of front wings rotate backwards around a front rotating shaft to coincide with the back of the fuselage, and the pair of vertical empennages rotate backwards around a rear rotating shaft to coincide with the back of the fuselage. The pair of rear wings rotate forwards around the rear rotating shaft to coincide with the bottom of the fuselage, and the pair of vertical empennages rotate downwards to coincide with the side face of the fuselage. A front spring support is installed on the back of the fuselage and located at the front end of the front rotating shaft, and the pair of front wings is connected with the front spring support through tension springs. A rear spring support is installed at the bottom of the fuselage and located at the rear end of the rear rotating shaft, and the pair of rear wings is connected with the rear spring support through tension springs. The tandem wing layout is adopted, the front wings and the rear wings serve as lift wings, the area of the wings is increased, the size of the unmanned aerial vehicle is reduced, and combat maneuverability is improved.

The invention discloses a method for hydrodechlorination and desiliconization of waste plastic oil, which comprises the following steps: removing Cl and Si elements from the waste plastic oil by using a slurry reactor under the action of a hydrogenation catalyst and hydrogen to finally obtain Cllt; 0.2 [mu] g / g, Silt; 1 [mu] g / g of a waste plastic oil product; the hydrogenation catalyst is a compound catalyst formed by an oil-soluble catalyst and a powder catalyst subjected to alkali treatment, and after recycling, the inactivated catalyst is subjected to roasting, primary alkali treatment, secondary alkali treatment and grinding and then regenerated to obtain the powder catalyst; therefore, the problems that in the removal process of Si and Cl elements in the waste plastic oil, catalytic materials, devices and equipment and product properties are affected, and hydrodechlorination and desiliconization catalysts are difficult to regenerate are solved.

The invention discloses a pneumatic control valve with toughness, relates to the technical field of valves, and aims to solve the problem that a valve rod of an existing pneumatic control valve does not have a self-repairing function. According to the pneumatic control valve, at least part of a rod section, located in a flow channel of a valve body, of a valve rod is arranged to be a tough rod section, and the tough rod section is mainly composed of a rod section body, a first rod barrel and a second rod barrel, wherein the rod section body is sleeved with the first rod barrel and the second rod barrel which are coaxially connected through a first flexible structure; when the pneumatic control valve works normally, the rod section main body of the tough rod section is mainly used for power transmission, and when the rod section main body of the tough rod section is broken after the valve rod is seriously impacted, the first rod barrel and the second rod barrel which are connected through the first flexible structure can replace the rod section main body for power transmission, so that the function of the tough rod section is automatically recovered; self-repairing of the valve rod is achieved, and it is ensured that the pneumatic control valve can rapidly recover to work normally.

The invention relates to the field of carbonization and activation devices, in particular to a biomass material carbonization and activation integrated device. The carbonization device comprises a carbonization bin, a carbonization piece, a material conveying piece, a treatment assembly, an activation bin, a first activation piece, a second activation piece and a combustion box. The carbonization piece is arranged between the biomass inlet and the biomass outlet of the carbonization bin; the material conveying piece controls the biomass to move; the processing assembly is located on the material conveying piece. Multiple groups of activating pieces I are arranged along the inner wall of the upper end of the activating bin; the activation part II is positioned inside the lower end of the activation bin; the combustion box is located outside the lower end of the activation bin. According to the biomass carbonization and activation device, biomass is carbonized in the horizontal moving process, physical activation is conducted in the vertical moving process, finally chemical activation is completed in cooperation with the mixing action and flue gas flowing, the whole biomass carbonization and activation device is integrated, the process is dynamic and coherent, reaction is efficient, and energy conservation and environmental protection are achieved.

A preparation method of a ceramic nanofiber membrane with a catalytic ozonation function comprises the following steps: S1, mixing ceramic nanofibers with a dispersing agent and a film-forming agent, coating a ceramic membrane support body with the mixture, and drying and sintering to form a ceramic nanofiber membrane with a double-layer asymmetric structure; s2, the ceramic nanofiber membrane with the efficient catalytic ozonation function is prepared through the processes of dipping, drying and firing the ceramic nanofiber membrane in a nano metal oxide precursor solution. The prepared ceramic nanofiber membrane with a double-layer asymmetric structure is taken as a basis, a nano metal oxide precursor solution is taken as a main raw material, and the ceramic nanofiber membrane with a catalytic ozonation function is prepared, so that the removal efficiency of pollutants, especially emerging pollutants such as sulfamethoxazole and tetracycline in a water body can be greatly improved; the problems that an existing catalytic ceramic membrane is low in catalytic efficiency, complex in preparation process, high in cost and the like are effectively solved.

The invention relates to the technical field of preparation of polymer oil-water separation membranes, in particular to a preparation method, a product and application of a hydrophilic PLA oil-water separation membrane. The preparation method of the hydrophilic PLA oil-water separation membrane comprises the following steps: dissolving polylactic acid in an organic solvent to obtain a spinning solution; carrying out electrostatic spinning on the spinning solution to prepare a PLA nanofiber membrane; the PLA nanofiber membrane is soaked in a dopamine hydrochloride solution, then membrane cloth is taken out, washed and dried, and the hydrophilic PLA oil-water separation membrane is obtained. The preparation method is low in cost and simple in preparation process. The PLA (at) PDA nanofiber membrane prepared by the preparation method disclosed by the invention is relatively high in oil-in-water emulsion separation efficiency and relatively high in separation rate, and has a good separation effect on n-hexane, gasoline, petroleum ether, peanut oil and the like, and the separation efficiency can reach 98% or above. The PLA (at) PDA nanofiber membrane disclosed by the invention is simple and convenient to apply and does not cause secondary pollution.

The utility model discloses a purifying and heating all-in-one machine which is provided with a raw water inlet and comprises a filtering unit with a filter element; the heating device comprises a heating cavity and a heating body, a water inlet of the heating cavity is communicated with the pure water outlet of the filtering unit, and the heating cavity is provided with a reflux inlet for discharging hot water to the filtering unit; the cooling device comprises a water storage cavity, and the raw water inlet is communicated with the filtering unit through the water storage cavity; one end of the backflow pipeline is communicated with the backflow opening, the other end of the backflow pipeline is communicated with a fluid path between the water storage cavity and the filtering unit, and at least partial area of the backflow pipeline is arranged in the water storage cavity in a penetrating mode. According to the heat purifying and purifying all-in-one machine, hot water which is not taken for a long time and needs to be emptied can flow back to the filtering unit to be filtered and reused, water resources can be saved, water flow waste is reduced, the emptied hot water participates in heat exchange, heat damage to the filtering unit due to the fact that the water temperature is too high is avoided, and the service life of the filtering unit is prolonged. And the water production capacity and the anti-freezing performance of the filtering unit can be improved.

The invention relates to the technical field of fertilizers, and discloses a fulvic acid fertilizer based on straw microbial fermentation and a preparation method and application thereof.The preparation method comprises the steps that straw is crushed and subjected to low-temperature plasma pretreatment, and pretreated straw is obtained; then, culturing the mixed microbial preparation to prepare a culture solution; then, the pretreated straw, a nutrient solution, a fermentation auxiliary agent and trichoderma are mixed for fermentation, and therefore a fermentation product is generated. The fermentation auxiliary agent is prepared from seaweed meal, bean flour, humus soil and molasses. And finally, carrying out solid-liquid separation on the fermentation product, and drying the separated solid part to finally obtain the fulvic acid fertilizer. Through combination of low-temperature plasma pretreatment and an innovative fermentation auxiliary agent, the preparation process of the fulvic acid fertilizer is optimized, the fertilizer efficiency of the fertilizer and the crop growth effect are improved, and meanwhile, the environment problem of agricultural waste is solved.

The invention relates to a soil conditioner for saline-alkali land treatment and a preparation method, and belongs to the technical field of soil conditioners. The soil conditioner for saline-alkali land treatment is prepared from a fermented fertilizer, biomass charcoal II, corn straw powder, attapulgite powder, humic acid and a compound microbial agent. The soil conditioner disclosed by the invention can be used for reducing the pH value of soil, reducing salinity, promoting the recovery of organic matters and improving the fertility of the soil, and is beneficial to improving the yield of crops.

The invention provides a preparation method of an integrated and dual-channel PCNFs / ZIF8-SA composite aerogel and a product and application thereof, and the preparation method comprises the following steps: step 1, adding sodium alginate SA and ZIF-8 into a PCNFs suspension, and stirring until the SA is fully dissolved until a uniform mixed solution is formed; the PCNFs is PAN / ZIF-8 / lignin / NaCl carbon nanofibers after hydrophilic modification, and the pH value of the PAN / ZIF-8 / lignin / NaCl carbon nanofibers is 7-8; step 2, pouring the mixed solution into a mold, and performing directional freezing in a freeze dryer to obtain a composite aerogel columnar structure with a directional channel structure; 3, hydrophobic modification is conducted on the upper layer of the composite aerogel columnar structure, a hydrophobic layer with a certain thickness is formed, the lower layer of the composite aerogel columnar structure is a hydrophilic layer, and the hydrophobic layer and the hydrophilic layer are integrated. The aerogel disclosed by the invention has a dual-channel integrated special structure including a fresh water channel and a salt extraction channel, accumulated salt can be extracted from a side channel while efficient solar seawater desalination is realized, an evaporation channel is prevented from being blocked, and the evaporation efficiency and the stability of the composite aerogel are well improved.

The invention belongs to the technical field of cables, and particularly relates to a high-voltage cable for a new energy vehicle, which comprises a conductor and an insulating layer, the insulating layer material is prepared from the following raw materials in parts by mass: 40 to 50 parts of polyethylene, 5 to 10 parts of beta-caryophyllene-maleic anhydride-polyethylene copolymer, 10 to 15 parts of ethylene-octene copolymer, 1 to 4 parts of composite cross-linking agent, 2 to 3 parts of cellulose nanofiber, 1 to 2 parts of kaurene, 5 to 10 parts of flame retardant, 0.5 to 1 part of flexibilizer and 0.5 to 1 part of lubricant. The prepared cable has excellent thermal stability, mechanical strength and insulating property, the service life of the cable is effectively prolonged, and the use stability of the cable is effectively improved.

The invention relates to a low-temperature graphite negative electrode material and a preparation method thereof, and belongs to the technical field of high polymer materials. According to the prepared low-temperature graphite negative electrode material, firstly, the surface of graphite is pre-oxidized through potassium persulfate, phosphorus pentoxide and concentrated sulfuric acid, and then under the action of sodium nitrate, potassium permanganate and hydrogen peroxide, graphite oxide is prepared; then, ammonium molybdate hydrate and thioacetamide are used as a molybdenum source and a sulfur source, graphite oxide is used as a supporting material, a molybdenum disulfide-graphite compound is synthesized, and the conductivity and the cycling stability are improved; secondly, the surface of the negative electrode is coated with amorphous resin carbon / nickel oxide, so that the ion diffusion efficiency of the low-temperature graphite negative electrode material is enhanced, and the electrochemical lithium storage performance is improved in a low-temperature environment; and finally, the surface of the amorphous resin carbon / nickel oxide is coated with a layer of polythiophene film, so that the rate capability of the negative electrode material is improved due to large surface area and high pores.

The invention relates to the technical field of all-vanadium redox flow batteries, and discloses a carbon grid derived multi-layer composite bipolar plate for a vanadium battery and a preparation method of the carbon grid derived multi-layer composite bipolar plate for the vanadium battery. The preparation method comprises the following steps: brushing a mixed slurry 1 prepared from a conductive filler, a binder and the like onto the surface to obtain preliminarily modified carbon fibers, then brushing a mixed slurry 2 prepared from oxide nanoparticles, conductive macromolecules and the like onto two surfaces of the preliminarily modified carbon fibers, drying, and repeating the two brushing and drying steps to obtain multi-layer conductive support layer modified carbon fibers; graphite paper is attached to the obtained carbon fibers, and then hot pressing treatment is performed to obtain the carbon conductive grid derived multi-layer composite bipolar plate. According to the prepared multi-layer composite bipolar plate, the etched carbon fiber is used as a substrate, beneficial mechanical strength and conductive grids are provided through stacking of the multiple layers of conductive coatings, the stability and conductivity of the bipolar plate are effectively improved, and therefore the efficiency of a vanadium battery is improved.

The invention discloses a preparation method of a self-humidifying membrane electrode of a proton exchange membrane fuel cell, relates to a preparation method of a membrane electrode, and aims to solve the technical problem of poor performance of the conventional self-humidifying membrane electrode. The method comprises the following steps: 1, synthesizing a COFs material by using 2, 4, 6-triformyl phloroglucinol and 2, 5-diaminobenzene sulfonic acid through a two-phase method; 2, preparing slurry a by using a Pt / C catalyst and a perfluorosulfonic acid ionomer solution; preparing self-humidifying catalyst layer slurry b from a COFs material, a Pt / C catalyst and a perfluorosulfonic acid ionomer solution; and 3, coating the slurry a on the anode surface of the proton exchange membrane, and coating the slurry b on the cathode surface to obtain the self-humidifying membrane electrode. According to the electrode, H2 / O2 is used as fuel, and the power density is 756.3 mW / cm < 2 > under the relative humidity of 20%; h2 / air is used as fuel, the power density is 437.8-879.7 mW / cm < 2 > under the relative humidity of 50%, and the material can be applied to the field of fuel cells.