1018results about How to "The preparation method is simple and controllable" patented technology

The invention relates to a preparation method of a transition metal oxide / carbon-based laminated composite material. According to the preparation method, a conducting material such as metal carbide, metal nitride or metal carbonitride with a two-dimensional laminated structure is taken as a precursor, a gas containing oxygen elements is taken as an oxidant, and the two-dimensional conducting material is converted into the transition metal oxide / carbon-based laminated composite material by in-situ oxidation under the condition of controlling the oxidation temperature at 300-1000 DEG C and controlling the oxidation time at 1-300 min. The method disclosed by the invention has the advantages of simplicity and easiness in operation, controllable structure and morphology, controllable crystal form and electrochemical properties of metal oxides, and the like; the preparation method is environment-friendly, and nuisanceless, has no by-product, can be used for reducing the economic costs of traditional preparation methods, and can be popularized; and the transition metal oxide / carbon-based laminated composite material not only can be used as a key electrode material of a new energy storage device, but also can be used as a denitration catalyst, so that the material can be applied to the fields of environmental remediation, and the like.

The invention relates to a nitrogen-doped nano carbon electrocatalyst for a fuel cell, and preparation and application of the nitrogen-doped nano carbon electrocatalyst. The electrocatalyst is prepared by adopting the steps of: with phenylamine as a reaction precursor, mixing the phenylamine, a surfactant and a soluble transition metal salt and then polymerizing under acidic and high-oxidization conditions, carrying out high-temperature carbonization on the polymer under the protection of an inert gas and / or ammonia atmosphere after drying, and finally carrying out acid treatment. The preparation method of the electrocatalyst is simply and easily controlled, and the mass production is easily realized. The nitrogen-doped nano carbon electrocatalyst has better oxygen reduction catalytic activity, stability and selectivity in an acidic medium fuel cell compared with Pt / C, and has higher catalytic activity and stability in an alkaline medium fuel cell compared with commercialized Pt / C. In addition, the nitrogen-doped nano carbon electrocatalyst also has the advantages of low cost and high anti-poisoning property, and is capable of replacing platinum to be used as a fuel cell oxygen reduction electrocatalyst.

The invention discloses traditional Chinese medicine fat-reducing healthy tea prepared from the following raw materials by weight: 10-28 parts of semen cassiae, 9-25 parts of rhizoma alismatis, 11-26 parts of poria cocos, 9-28 parts of hawthorn, 8-24 parts of kelp, 5-18 parts of aloe, 5-18 parts of folium sennae, 10-26 parts of astragalus membranaceus, 11-22 parts of fructus aurantii, 12-29 parts of coix seed, 12-30 parts of adzuki beans, 8-22 parts of chrysanthemum, 7-20 parts of tangerine peel, 7-17 parts of prunella spike, 6-20 parts of radish seed, 8-20 parts of bitter gourd, 9-22 parts of white gourd peel, 6-19 parts of lotus leaf, 8-17 parts of green tea and 4-16 parts of licorice. The traditional Chinese medicine fat-reducing healthy tea prepared according to assistant and guide compatibility of medicines for synergistic effect has the effects of inducing diuresis to alleviate edema, smoothening intestines, moistening excrement, promoting digestion, removing food accumulation, reducing fat, losing weight, nutrition and health care, and other effects, after long-term use of the health care tea, people taking the healthy tea glow with good health, have ruddy complexion and unobstructed body, and function of each internal organ can reach the best state.

The invention discloses a plant-growing type eco-concrete. The plant-growing type eco-concrete consists of a concrete framework structure and a culture medium, wherein the concrete framework structure mainly comprises cement, water, rock ballasts and a water reducing agent, the weight ratio of the cement to the water to the rock ballasts is 1:0.28-0.45:4-6.5, and the added amount of the water reducing agent is 1 to 3 percent of that of the weight of the cement; and the culture medium consists of natural soil, a water retention agent and a sustained-release fertilizer in a weight ratio of 1:0.1-0.2:0.01-0.015. A preparation method of the plant-growing type eco-concrete comprises the following steps of: manufacturing the concrete framework structure; maintaining the concrete framework structure; filling the culture medium; sowing grass seeds; covering and compacting the culture medium on the surfaces of the grass seeds; putting precast blocks in a place to be paved; and maintaining the precast blocks until root systems of the grass seeds grow into the soil under the concrete. Compared with the prior art, the plant-growing type eco-concrete has simple materials and a simple structure, and the preparation method is simple and easy to control.

The invention provides a preparation method of a noble metal-graphene nanometer composite, which comprises the steps of: oxidizing powdered graphite to prepare graphene oxide by oxidizing potassium permanganate; dispersing the graphene oxide in water; ultrasonically stripping a dispersed graphene oxide piece which is formed in water solution; reducing the graphene oxide piece with hydrazine hydrate under the existence of surface active agent to obtain graphene water solution which can be stably dispersed in water phase; centrifugally concentrating the graphene water solution; adding noble metal prodromic salt and electrolyte salt into surface active agent-containing water solution; adding water phase-dispersed graphene in proportion; adjusting PH value; reacting by means of ultrasonic electrochemistry under the density of the constant current and the intensity of ultrasound; centrifugally separating with high speed; and washing with ultrapure water to prepare the noble metal-graphene nanometer composite. The method has the advantages of convenience, speediness and controllability, etc. The prepared graphene nanometer composite has good dispersibility in water, can be stably existed for a long term, and has good electro-catalysis redox characteristic to organic matter.

The invention discloses a processing method for a papaya fruitcake. The processing method comprises the following steps: (1) preparation of papaya pulp: pouring papaya into 3-5% of salt water, boiling, mashing and grinding; (2) gelatin melting: mixing 15-25% of cane sugar and 1-3% of edible gelatin, and dissolving by hot water; (3) blending and boiling: adding 15-25% of maltodextrin, 10-20% of coconut milk, 0.5-1.5% of citric acid, 0.1-0.5% of sodium citrate and the melted edible gelatin into the papaya pulp to bend, homogenize, boil and stew until the soluble solid reaches 70-80%; (4) forming and drying: placing the papaya pulp material boiled in the step (3) in a forming die to cool, preparing the formed fruitcake body, then alternating temperature, baking, drying and packaging, so that the papaya fruitcake is obtained. The processing method is simple and feasible, the prepared fruitcake is rich in nutrition, and soft and smooth in taste, has unique papaya fragrance and coconut milk fragrance, can be stored for a long time without particles on the papaya fruitcake, and sugar-flowing, and is suitable for people of all ages.

The invention discloses a gold nanotube based flexible stretchable electrode and a preparation method and application thereof. The preparation method comprises the following steps: performing hydrophilic treatment on a polydimethylsiloxane (PDMS) elastic film in advance and boosting uniform adhesion and fixing of a silver nanowire on the surface of an elastic base; with a disordered silver nanowire as a template, further preparing a gold nanotube with large length-diameter ratio through a replacement reaction of [Au(en)2]Cl3 and silver, thereby acquiring the gold nanotube based flexible stretchable electrode; connecting the electrode with an external electrode wire, thereby lastly acquiring an electrode used for testing. The gold nanotube based flexible stretchable electrode provided by the invention has the characteristics of high mechanical deformation resistance, excellent electrochemical property and excellent biocompatibility, can be used for monitoring mechanical sensitive cells in real time under true physiological conditions, and breaks through limitation to application of an existing nanometer material to a stretchable electrochemical transducer. The preparation method is simple and controllable and thus the electrode is easy to prepare.

The invention discloses anti-corrosion self-restoration paint and a preparation method thereof. The anti-corrosion self-restoration paint is prepared from 5 to 10 percent of self-restoration ingredients in percentage by mass, wherein the self-restoration paint is paint of anti-rust filling materials. The self-restoration ingredients can be microspheres loaded with corrosion inhibitors; the loading quantity of the corrosion inhibitors is 10 to 30 percent of the mass of the microspheres. The prepared anti-corrosion self-restoration paint has the advantages that when the coating is damaged through corrosion, corrosion agent molecules are automatically released; the contact of metal with the corrosion media is prevented, so that the effect of preventing the further enhancement of the corrosion can be prevented; the sensitivity is high; the anti-corrosion performance is high. The preparation method is simple; the control is easy; no pollution is caused; the cost is low; the anti-corrosion self-restoration paint is suitable for industrial production.

The invention relates to a proton exchange membrane, particularly relates to a preparation method for a compound proton exchange membrane for a high-temperature-resisting fuel cell, and belongs to the field of fuel cells. According to the preparation method, a precursor containing an imidazole ring is put into a polybenzimidazole solution to be directly subjected to a sol-gel method to be crossly linked into a membrane and the membrane is adsorbed with phosphoric acid to be prepared into a phosphoric acid doped proton exchange membrane. Compared with the prior art, the preparation method for the compound proton exchange membrane for the high-temperature-resisting fuel cell has the following advantages that the precursor containing the imidazole ring is put into the polybenzimidazole solution to be directly subjected to the sol-gel method to be crossly linked into the membrane; the preparation method is simple and controllable; an imidazole structure contained in a silicon nano particle can react with the phosphoric acid to generate an imidazolium salt; one part of the phosphoric acid is fixed and the generated imidazolium salt has a certain adsorption effect on the free phosphoric acid, so that the adsorption capability to the phosphoric acid by a PBI (Polybenzimidazole) compound membrane is improved greatly and the leakage and loss of the phosphoric acid are inhibited; therefore, the proton conductivity of the proton exchange membrane is improved.

The invention discloses a nitrile resin monomer, a nitrile resin polymer and a preparation method of the nitrile resin monomer and the nitrile resin polymer, belonging to the technical field of organic polymer materials. The nitrile resin monomer is a tetraphthalonitrile resin monomer containing benzoxazine cycle, and the nitrile resin polymer is a product obtained by heating polymerization of the nitrile resin monomer. The nitrile resin monomer has a low viscosity, a good mobility and the processing performances of low-temperature curing and the like at a low temperature. The nitrile resin polymer has the good curing performances of self-flame resistance, adhesion, heat stability and the like. The resin monomer has the good processing performances of benzoxazine resins, and the resin polymer has the high-temperature resistance of nitrile resins, thus reducing the curing processing temperature and being capable of being used in a high-temperature temperature, namely, having the advantages of low temperature processing, medium temperature formation and high temperature use; and the resin monomer and the resin polymer can be used in the fields of coatings, adhesives, electronic packaging materials, aeronautics, astronautics, ships, resin matrix composites and the like. The preparation method is simple and easy to control, low in reaction temperature, energy-saving, and suitable for industrialized production.

The invention discloses a metallic oxide-coated modified doped ternary anode material and a preparation method thereof. The anode material is represented by Li (Ni0.5Mn0.3Co0.2)(1-x)SrxO2.mAl2O3, and comprises a substrate and a coating layer coating the outer part of the substrate, wherein the substrate is represented by Li(Ni0.5Mn0.3Co0.2)(1-x)SrxO2; the coating layer is Al2O3. The anode material is prepared through combining the solid phase method with the heterogeneous nucleation method. The metallic oxide-coated modified doped ternary anode material provided by the invention has higher electronic conductivity and cycling stability, the surface is uniformly and completely coated, and the preparation method is easy, controllable, low in cost and suitable for large-scale industrial production.

The invention discloses a phosphorus-containing and nitrogen-containing expansion type flame-retardant polymer and a preparation method thereof. The preparation method is characterized in that: the phosphorus-containing and nitrogen-containing expansion type flame-retardant polymer is prepared by solution polycondensation reaction or melt polycondensation reaction of diphosphorus acylchloride or diphosphorus acylbromide and a diamine functional group-containing compound. The expansion type flame-retardant polymer comprises phosphorus-containing and nitrogen-containing phosphamide with a structure unit formula shown in the specifications, wherein n is an integer of from 1 to 200; R1 is oxygen or sulphur; and R is alkoxy, alkylthio, aryloxy or arylthio. The product of the invention has high compatibility with a high molecular material matrix, difficult transfer and excellent durability. The preparation method has the advantages of simpleness, easy control, high yield, wide sources of the required raw materials and easy industrialized production. A high polymer with a flame-retardant function can be directly prepared, or the high polymer serving as a flame-retardant additive can be added into various polyesters, polyamide, polyolefin, epoxy resin, polystyrene, high impact polystyrene or acrylonitrile butadiene styrene (ABS) polymer.

The invention discloses double-shell-layer and yolk-shell-layer nitrogen-doped hollow porous carbon and preparation methods thereof and application thereof. A ZIF-8@ZIF-67@ZIF-8@ZIF-67 four-layer nuclear shell structure, a ZIF-67@ZIF-8@ZIF-67 three-layer nuclear shell structure and a ZIF-67@ZIF-8@ZIF-67@ZIF-8@ZIF-67 five-layer nuclear shell structure are prepared at a room temperature and the prepared nuclear shell structures are used as precursors; carbonization is carried out directly to obtain double-shell-layer, yolk-single-shell-layer, and yolk-double-shell-layer nitrogen-doped hollow porous carbon. According to the invention, the preparation method is simple and controllable; and production and scaling up can be realized; and the obtained nitrogen-doped hollow porous carbon has characteristics of large specific surface area, nitrogen doping, graphitization, hierarchical pore structure, and hollow and hole structure and has the excellent electrochemical performance. The nitrogen-doped hollow porous carbon can be used as a supercapacitor electrode material.

The invention provides an amino metal organic framework material containing an active metal component. The amino metal organic framework material is used as a carrier; and the active metal component is dispersed in the carrier, wherein the weight of the active metal component is 0.05-15% of that of the amino MOFs material. According to the invention, a mixed solution is formed from the carrier and an active metal precursor containing a carbanyl group; amino in the MOFs material is reacted with the carbanyl group in the active metal precursor, so that the active metal precursor is connected to the MOFs material; then, the material is prepared through a reduction method; uniform dispersion of the active metal component in the MOFs material is realized; when the material is used as the catalyst, the catalytic effect is obvious because of high dispersion of the active component, for example, the amino metal organic framework material is used in a process for preparing aromatic amine by hydrogenation reduction of an aromatic nitro compound, etc.

The invention relates to an artificial trachea cannula made of nano materials in the technical field of medical appliance and a preparation method thereof; the artificial trachea cannula comprises a respirator joint, an air supply tube, an inflation tube, an inflation gasbag, a drain pipe and a lubricant coating, wherein, the inflation tube is in the air supply tube, the output end of the air supply tube is connected with the respirator joint; an inserting section of the air supply tube is cuniform; the external wall of the air supply tube is provided with inflation gasbags; the position where the inflation tube is correspondingly arranged is provided with holes; the drain pipe is embedded on the external wall of the air supply tube and is adjacent to the inflation gasbag; the side of the drain pipe close to the inflation gasbag is provided with a liquid outlet, the other side thereof is connected with an injector; the lubricant coating is arranged on the external wall of the inflation gasbag and the air supply tube, the air supply tube and the inflation gasbag are made of modified plastics. With the method of the invention adopted, damage to lumen tissue when the tube is inserted is reduced, pain is reduced, complicating disease is prevented from occurring; in addition, the preparation process is easy and controllable, the cost is low, as a result, the method is applicable to batch production.

The invention provides an MOF (metal-organic framework) separating layer film and a preparation method thereof. The preparation method comprises the following steps: a surface modification layer is formed on the surface of a base film through an interfacial polymerization reaction; an MOF separating layer grows secondarily on the surface modification layer, and preparation of the MOF separating layer film is completed. A preparation method of a positively charged MOF separating layer film further comprises the step that acid radical ions in the MOF separating layer film are removed by soaking the prepared MOF separating layer film in methyl alcohol. The MOF separating layer grows secondarily on the surface modification layer, and by means of the pore diameter screening action and a frame charging effect, the MOF separating layer film can effectively realize the effect of selective ion separation; layers of the MOF separating layer film are not formed through simple physical bonding, and accordingly, the defect of separation is overcome.

The invention relates to high-strength collagen gel. The collagen gel is characterized in that the high-strength collagen gel undergoes three-dimensional size shrinkage by immersing radiation cross-linked low-density collagen hydrogel in water or an aqueous solution for a period of time and maintaining a certain temperature; the compression modulus is increased by 2-5 times that of the low-density collagen hydrogel after self-shrinkage by solution immersion; and the high-strength collagen gel has a three-dimensional structure or high porosity, and the pore diameter is distributed in a gradient manner. The invention further relates to a method for preparing the high-strength collagen gel.

The invention relates to a preparation method of a ZSM-5 molecular sieve. The method comprises performing assistant crystallization of a ZSM-5 molecular sieve precursor by utilizing steam of a template agent solution to obtain an ammonium-type ZSM-5 molecular sieve; and optionally, removing the template agent from the ammonium-type ZSM-5 molecular sieve to obtain a hydrogen-type ZSM-5 molecular sieve. According to the invention, the preparation method of the ZSM-5 molecular sieve abandons a conventional continuous medium in a crystallization process, and alkali metals or hydroxides of alkali metals, overcomes the technical prejudice in the prior art, and provides a novel synthesis idea for the field.

The invention discloses a preparation method of nickel nanopowder. The method includes: dissolving nickel salt and surfactant in water, mixing well, adding complexing agent into obtained nickel slat solution, mixing for reaction to obtain complex nickel salt solution A, dissolving reducing agent and alkali in water to obtain solution B, heating the solution A, adding the solution B into the solution A to obtain mixture of the solutions A and B, cooling, subjecting a reaction product to solid-liquid separation to obtain nickel nanopowder filter cakes, washing to remove impurities in the filter cakes, washing the washed filter cakes with absolute ethyl alcohol to remove moisture, and removing ethyl alcohol and trace moisture from the filter cakes, washed with the absolute ethyl alcohol, in vacuum at the temperature of 40-60 DEG C so as to obtain spherical nickel nanopowder. The method has the advantages that the process is short and easy to control, production cost is low, reduction degree is high, production efficiency is high, and industrial production is easy.

The invention discloses a rubber material for windscreen wipers, a preparation method of the ionomer-metal composite artificial muscle, and a process for producing a windscreen wiper from the rubber material. The rubber material contains the following ingredients in parts by weight: 100 of methylvinylsilicone rubber, 20 to 55 of fumed silica N20, 1 to 2.5 of hydroxylsilicone oil, 5 to 10 of lubricants, 0 to 1.7 of colorants, and 0.8 to 2.5 of 2,4-dichlorobenzoyl peroxide. In the rubber material, methylvinylsilicone rubber replaces natural rubber or a composition of natural rubber and other synthetic rubber in the existing formula, the fumed silica N20 is used as reinforcing agent, the structure of fumed silica N20 is controlled by hydroxylsilicone oil, so that the high / low temperature resistance of the rubber material is improved an the strength of the rubber material is increased, and the rubber material is easier to be processed. The special lubricants are adopted to endow the rubber material with excellent hydrophobicity, which prevents water from being attached on the glass surface after cleaning the glass windscreen.

The present invention relates to a composite catalyst for catalytically oxidizing VOCs. According to the composite catalyst, a metal base and / or a ceramic base having an ordered mesoporous structure is adopted as a carrier, at least a transition metal oxide is supported on the carrier as an active component, and the transition metal is a non-noble metal element. According to the present invention, the composite catalyst is obtained by controlling the valence state of the transition metal element of the composite catalyst, such that the low temperature catalytic oxidation of VOCs is achieved, and the minimum T90 (the catalysis temperature of the 90% purification rate) for catalytic purification of benzene can achieve 148 DEG C; and the preparation method is simple and controllable.

The invention relates to the field of graphite film preparation, and in particular relates to a layer-number-controllable graphite film based on a nickel-copper composite substrate and a preparation method of the film. The preparation method comprises the following steps of: 1) preparing the nickel-copper composite substrate; 2) carburizing, namely heating the nickel-copper composite substrate to 200-300 DEG C, then introducing a carbon source gas and a carrier gas, and carrying out heat preservation for 30-240 minutes for carburization of a nickel layer; and 3) depositing carbon, namely cutting off the supply of the carbon source gas, raising the temperature of the nickel-copper composite substrate to 300-1000 DEG C, introducing the carrier gas, and carrying out heat preservation for 10-180 minutes so as to obtain the graphite film based on the nickel-copper composite substrate. The preparation method has the beneficial effects that a novel preparation process is provided, the layer number of graphite is controlled more easily, the problem that the existing composite substrate is high in preparation cost, and a graphite film material which is low in cost, simple in preparation method, easy to control, good in product quality and large in area is obtained.

The invention which discloses a composite medium film material based on polyvinylidene fluoride and graphene, and a preparation method thereof belongs to the technical field of electric functional materials. The composite medium film is obtained through compounding polyvinylidene fluoride and graphene, wherein the graphene mass percent content is 0.5-3% of the mass of the composite medium film. The preparation method comprises the following steps: preparing an organic solution (a system A) of polyvinylidene fluoride powder; adding graphene powder to the system A to obtain a system B; spraying the system B on the surface of a substrate through adopting an ultrasonic atomization technology; and drying the system B sprayed on the surface of the substrate to obtain the composite medium film material based on the polyvinylidene fluoride and the graphene. According to the invention, the graphene which approaches and does not exceed a percolation threshold is added to a polyvinylidene fluoride film to obtain the composite medium film material with the dielectric constant 100% higher than that of the pure polyvinylidene fluoride film material, and the original flexibility and the easy processability are maintained; and the preparation method has the advantages of simplicity, easy control and low cost.

The invention relates to a preparation method and application of a carbon / ceramic composite material, in particular to a preparation method and application of a carbon / ceramic composite material needed for braking a high-momentum delivery system. The preparation method includes: using a C / C composite material of 1.2-1.5 g / cm3 in density as a raw material; disposing the raw material in impregnation liquid I for impregnation, pyrolyzing in a protective atmosphere after impregnation, repeating impregnating-pyrolyzing operations until a carbon / ceramic composite material of 1.85-1.9 g / cm3 in density is obtained; treating the carbon / ceramic composite material obtained at high temperature until density of the carbon / ceramic composite material is lowered to 1.82-1.88 g / cm3 to obtain a pre-finished product; disposing the pre-finished product in impregnation liquid II, decomposing in a protective atmosphere after impregnation is completed, polishing after decomposing, and repeating impregnating-decomposing-polishing operations until a carbon / ceramic composite material finished product of 1.93-2.0 g / cm3 is obtained.

The invention discloses a spherical hollow mesoporous carbon shell and a preparing method thereof. The spherical hollow mesoporous carbon shell is formed by synthesizing spherical calcium carbonate, soluble phenolic formaldehyde resin and a block copolymer, wherein the spherical calcium carbonate is used as a template agent, the soluble phenolic formaldehyde resin is used as a carbon resource, and the block copolymer is used as a structure directing agent. The spherical hollow mesoporous carbon shell has the advantages that the spherical calcium carbonate with different particle sizes is used as a template, and different phenolic formaldehyde resins are used as the carbon resource to prepare the hollow mesoporous carbon shell; (1) the preparing method of the calcium carbonate is simple and controllable, the cost is low, the easy obtaining is realized, a large amount of hydroxyl groups are enriched on the surface of the calcium carbonate, and the calcium carbonate is favorable to further carry out reaction, so the calcium carbonate can be used as the potential template agent; and (2) the different phenolic formaldehyde resins are used as the carbon resource, and have higher hydrogen-bonded action binding with a triblock copolymer, the other end of the triblock copolymer is bound with the hydroxyl groups on the surface of the calcium carbonate, then the phenolic resin is coated on the surface of the calcium carbonate, and the template of the calcium carbonate is removed by room-temperature polymerizing, co-polymerizing, inertia gas high-temperature carbonizing, and dilute acid, so the spherical hollow mesoporous carbon shell is obtained.

The invention relates to a preparation method of lithium iron phosphate / graphene nano composite material. The preparation method comprises the steps of dispersing iron trioxide / graphene composite into a solvent, and adding ascorbic acid, lithium hydrate and phosphoric acid to obtain a precursor dispersing agent; and arranging the precursor dispersing agent into a reactor, and conducting solvent thermal reaction for 1-48h at 90-350 DEG C.

The invention discloses a gradient doped cobaltosic oxide material and a preparation method thereof. The preparation method comprises the following steps: mixing a cobalt solution with a precipitationagent so as to obtain a pre-precipitate A; further putting a salt solution with doping elements into the reaction system so as to obtain a doped precipitate B; and finally calcining the doped precipitate B at a certain temperature, thereby obtaining gradient doped cobaltosic oxide. The gradient doped cobaltosic oxide material is prepared in a coprecipitation mode, the preparation method is simple, controllable in condition and convenient in industrial production, and the prepared gradient doped cobaltosic oxide material has great significance for improving structural stability and electricityof anode materials.

The invention discloses a functional fiber and a microfluidic spinning device and fiber preparing method thereof. The microfluidic spinning device comprises a control mechanism, a nascent fiber forming mechanism, an airflow gathering drafting mechanism and an after-finishing and winding mechanism. The fiber preparing method includes the steps that spinning liquid or solidification liquid is sequentially injected into a spinning can, and standing defoaming is carried out; fiber constituent designing is online achieved through a control mechanism; the spinning liquid or the solidification liquidenters a microfluidic spinning chip through spinning liquid pipes, is converged in a public spinning liquid pipe, and is collected to form a nascent fiber; the nascent fiber is drafted through the airflow gathering drafting mechanism, solidified and dried through a fiber heating drier in sequence, and is wound to a winding roller finally, and the structure-controllable and function-devisable fiber is obtained. According to the microfluidic spinning device, the structure of the fiber is designed through programming, a preparing method is controllable, a complex structure and the multifunctionality which are difficult to achieve with other spinning methods are achieved, the preparing process is simple, repeatability is good, and application fields are broad.

A composite positive electrode of a lithium sulfur battery is formed by combining a diaphragm layer, a porous carbon layer and a carbon sulfur compound, wherein the porous carbon layer is arranged on one side of the diaphragm layer, and the carbon sulfur compound is arranged on the porous carbon layer. The preparation method comprises the following steps of adding the porous carbon, a conductive agent and an adhesive into an organic solvent to prepare paste, applying the paste onto one side of a diaphragm, and forming a porous carbon layer compound on one surface of the diaphragm layer; and adding the carbon sulfur compound, the conductive agent and the adhesive into the organic solvent to prepare paste, and applying the paste onto the porous carbon layer in the compound to obtain the composite positive electrode of the lithium sulfur battery. The lithium sulfur battery disclosed by the invention comprises the composite positive electrode of the lithium sulfur battery, a negative electrode and an electrolyte. By the lithium sulfur battery, the interface resistance can be reduced, the ionic conductivity and electron conductivity are improved, and the energy density, the cycle performance and the rate performance of the lithium sulfur battery are effectively improved.

The invention discloses a lithium-rich manganese based lithium ion battery cathode material which comprises a lithium-rich manganese based cathode material, a spinel phase LiM2O4 (M=Mn, Co, Ni, etc.)formed on the surface of the lithium-rich manganese based cathode material and a lithium fluoride coating layer which coats the outside of the lithium-rich manganese based cathode material. The surface of the lithium-rich manganese based cathode material of the lithium-rich manganese based lithium ion battery cathode material is formed with the spinel phase LiM2O4 (M=Mn, Co, Ni, etc.), and the external of the lithium-rich manganese based cathode material is coated with the lithium fluoride coating layer, so that the initial coulomb efficiency of the lithium-rich manganese based lithium ion battery cathode material is effectively improved, the initial cycling irreversible capacity is lowered, and the rate capability and the cycling stability of the lithium-rich manganese based lithium ion battery cathode material are improved.