56results about How to "Obvious reunion phenomenon" patented technology

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a preparation method of lithium ion battery positive electrode slurry. The method comprises the following steps: S1, adding a conductive agent into a dispersing agent, and performing stirring and dispersing to obtain a conductive agent dispersion liquid with the solid content of 0.5-3%; S2, dissolving an adhesive in a solvent, and acquiring an adhesive solution with the solid content being 5-9%; S3, adding the adhesive solution into the conductive agent dispersion liquid, performing pre-stirring,and then fully stirring to obtain mixed slurry; S4, adding a positive electrode active material into the mixed slurry, performing pre-stirring, and then fully stirring to obtain positive electrode slurry with the solid content of 58-65%; wherein the step S1 and the step S2 are simultaneously carried out, the step S1 is firstly carried out and then the step S2 is carried out, or the step S2 is firstly carried out and then the step S1 is carried out. Compared with the prior art, the preparation method is high in preparation efficiency, the prepared positive electrode slurry is uniformly dispersed and good in stability, and the overall performance of the lithium ion battery can be improved.

The invention belongs to the technical field of lithium ion battery manufacturing, and particularly provides a preparation method of high-capacity lithium ion battery positive electrode slurry. The preparation method comprises the following steps that various raw materials are weighed and subjected to baking processing before use; polyvinylidene fluoride is dissolved into an N-methyl-2-pyrrolidonesolution with the weight 12-19 times of that of polyvinylidene fluoride, and after stirring and filtering are conducted, an adhesive solution A is obtained; a carbon nanotube solution is added into the adhesive solution A, and after the mixed solution is stirred to be uniform, a conducting adhesive solution B is obtained; the conducting adhesive solution B is added into a stirrer in twice, and stirring is conducted to obtain slurry C; ethyl alcohol is added into the slurry C, the slurry viscosity is adjusted with N-methyl-2-pyrrolidone, and after stirring is conducted, slurry D is obtained; and after the slurry D is subjected to processing of a high-speed dispersion machine, filtration processing and vacuum deformation processing, the final slurry is obtained. According to the preparationmethod, in the production process, preparation of the conducting adhesive solution B and preparation of the final slurry are conducted independently and synchronously, and the production efficiency of the positive electrode slurry is effectively improved; and a lithium ion battery prepared from the slurry is low in internal resistance, high in energy density and beneficial to exertion of the maximum gram capacity.

The invention provides a method for preparing nanometer titanium dioxide slurry through a cellulose acidification process. Raw materials comprise titanium dioxide powder, acid liquor dispersing agent, surface stabilizer and surfactant. The method comprises the steps of: firstly, using acid liquor to treat the titanium dioxide powder; then dissolving the treated titanium dioxide powder in solution prepared by using the surface stabilizer, the surfactant and the acid liquor dispersing agent; and finally agitating, heating and concentrating to obtain slurry with certain content. The invention aims at providing a new method which has the advantages that the manufacturing method is simple and convenient, the raw materials are easy to obtain, the manufacturing cost is low, the performance is stable, the output efficiency is high, the process is environmental-friendly, and the method is suitable for the large-scale industrial production of titanium dioxide slurry and is used for avoiding and overcoming the defects that the yield is low, the steps are complex, the performance of the prepared slurry is unstable and the like when the existing method is used for preparing the titanium dioxide slurry by using nanometer titanium dioxide powder.

The invention belongs to the technical field of flame-retarding and smoke-inhibiting agents and particularly relates to a layered double hydroxide-molybdate ion modified graphene flame-retarding and smoke-inhibiting agent and a preparation method of same. The preparation method includes the steps of supporting LDH onto surface of graphene and intercalating molybdate ions between layers of the LDH. The flame-retarding and smoke-inhibiting agent not only improves the flame-retarding and smoke-inhibiting performances of a polymer but also improves physical and mechanical performances of the polymer.

The invention discloses a preparation method of a porphyrin coupled silicon dioxide organic-inorganic nonlinear optical material, which comprises the following steps: 1. heating and reflowing a mixed solution of Msco-tetra-(4-carbomethoxyphenyl) porphyrin copper and gamma-aminopropyltriethoxysilane at the temperature of 160 to 250 DEG C for 10 to 60 hours to obtain a transparent deep red liquid; 2. dissolving a reaction product of step 1 and metal alkoxide into anhydrous ethanol, and stirring at room temperature for 1 to 2 hours; 3. dropwise adding a (H2O) / (C2H5OH) mixed liquid into the reaction product of step 2 at the room temperature for hydrolysis and polymerization reaction for 1 to 5 hours; and 4. pouring the obtained transparent sol into a glass or plastic utensil, sealing with a thin film, ageing at the room temperature for 35 to 45 days, and pricking a hole on the thin film every day to finally prepare compound dried gel. The invention has the advantages that the monomer doping concentration of porphyrin molecules in a gel solid medium can be greatly improved, and the molecular energy level structure and the spectral characteristic of the porphyrin molecules in the gel medium are kept.

The invention discloses a preparation method of an ultra-long nano silver wire material. The preparation method comprises the following steps: 1, adding glucose and polyvinylpyrrolidone into deionized water; 2, adding a copper sulfate solution into a clarified solution; 3, adding a sodium chloride solution into a mixed solution A; 4, dropwise adding a silver nitrate solution into a mixed solution B, and carrying out a hydrothermal reaction; and 5, settling and washing a flocculent product to obtain the ultra-long nano silver wire material. According to the method, silver nitrate is used as a raw material, the glucose is used as a reducing agent, a hydrothermal reaction is adopted, and the ultra-long silver nanowire material is prepared in an aqueous solution system, so that a common process for preparing the ultra-long silver nanowire material through a polyhydric alcohol organic system at present is broken through, and the technical limitations that the ultra-long silver nanowire material is difficult to wash and harsh in reaction condition are broken through; and the novel method is developed under an aqueous solution system, does not need inert atmosphere protection, is low in cost, is green and environment-friendly, and is easy for industrial production and preparation of the ultra-long nano silver wire material.

The invention provides a preparation method of a hollow mesoporous silica\APS\graphene oxide nano container. According to the invention, hollow mesoporous silica and aminopropyltrimethoxysilane are mixed for modification, then the modified hollow mesoporous silica is grafted to the surface of graphene oxide, and the hollow mesoporous silica\APS\graphene oxide nano container which has good dispersity in an epoxy coating and can load a corrosion inhibitor is prepared. According to the preparation method, the dispersity of the graphene oxide in the epoxy coating is improved, so that the service life of the graphene oxide epoxy coating is greatly prolonged. The limitation that graphene oxide can only provide a passive protection function in an epoxy coating is also solved, the graphene oxide is prepared into a nano container capable of loading a corrosion inhibitor, and the active corrosion protection function can provide long-acting corrosion protection for a metal substrate.

The invention discloses a method for preparing high-purity nano indium oxide powder, which comprises a reaction box body for providing a purification reaction place, a bin gate is arranged on the reaction box body, a crucible for containing indium powder is arranged in the reaction box body, and a high-frequency induction coil for heating the crucible is arranged below the crucible. The O2 gas cylinder is connected with the reaction box body through a pipeline provided with a ball valve switch, the vacuum pump is connected with the reaction box body through a pipeline provided with a ball valve switch, and the reaction box body is further provided with a vacuum degree meter. By adopting the scheme, a special high-temperature reaction chamber and an atomizer do not need to be specially arranged. Compared with a precipitation method, the method does not generate waste liquid, does not need a washing and centrifuging process, does not need a high-temperature calcining link, and is beneficial to environmental protection and saving of water resources and energy. Compared with a solid-phase method, the indium vapor is oxidized with oxygen at high temperature, and the nano indium oxide powder with high purity, uniform particle size and high sintering activity can be prepared.

The invention discloses continuous casting crystallizer nano protection slag and a preparing method thereof. Spherical nanoparticles with the volume ratio being 0.1 to 50% are doped in the protectionslag, due to the fact that that the spherical nanoparticles have the advantages of being high in heat conduction coefficient, good in sphericility degree, proper in grain size and the like, uniform and stable nanofluid is formed in the liquid protection slag, nano particles with the enough high interfaces between the particles and the enough low Van der Waals' effect potential can be formed in solid protection slag, the nano particles can be kept uniform distribution in the liquid-state protection slag, the obvious agglomeration does not exist, after the protection slag is added, the continuous casting crystallizer nano protection slag is formed, the excellent heat transfer property and the lubricating property can be achieved, the casting blank surface and the inner quality can be improved, and the method is suitable for producing products (like a super-thick plate) of the special requirement and products (like super-high pulling rate) of the particular continuous casting process.

The invention relates to a magnetic biomimetic catalyst and a preparation method and an application method thereof. The preparation method adopts the technical scheme that the preparation method comprises the following steps of uniformly mixing coal-based carbon and a KOH (potassium hydroxide) solution, and treating for 1 to 2h under the vacuum atmosphere at the temperature of 105 DEG C; putting into a microwave generation device, and activating at the temperature of 300 to 700 DEG C; cooling, adding deoxidizing and deionizing water, stirring, standing, and obtaining an upper KOH recycling liquid and a lower precipitate; washing the lower precipitate, and drying, so as to obtain the modified coal-based carbon; uniformly mixing FeSO4.7H2O (ferrous sulfate), the modified coal-based carbon and the deoxidizing and deionizing water, so as to obtain suspension liquid; uniformly mixing NaNO3 (sodium nitrate), NaOH (sodium hydroxide) and the deoxidizing and deionizing water, dripping into the suspension liquid, stirring, and standing; washing the lower magnetic precipitate to neutral state, and drying, so as to obtain the magnetic biomimetic catalyst; uniformly mixing the magnetic biomimetic catalyst and organic wastewater, adding H2O2 (hydrogen peroxide), stirring, and treating, so that the COD (chemical oxygen demand) and chroma of the organic wastewater can reach the national industrial regeneration water quality standard. The preparation method has the characteristics that the technology is simple, the operability is high, the cost is low, the yield is high, and the environment-friendly effect is realized.

The invention relates to a method for preparing an anode catalyst of a direct methanol fuel cell. The method comprises the following steps of: dispersing and dissolving carbon black, SnCl4.5H2O and SbCl3 in absolute ethanol; filtering, washing, drying, grinding and calcining to obtain an antimony tin oxide / carbon (ATO / C) carrier, which has a uniform size, is uniformly dispersed and is hardly agglomerated, by taking ammonia water or sodium hydroxide solution as a precipitator; dissolving H2PtCl6.6H2O in ethylene glycol; heating in the atmosphere of inert gas to obtain platinum (Pt) sol; and mixing the PT sol and ethanol suspension of the ATO / C to obtain a Pt-ATO / C catalyst. The method has a simple process and is low in cost; and the prepared Pt-ATO / C catalyst is highly dispersed, has a uniform particle size, does not have obvious agglomeration phenomenon, has a lower starting potential and higher current density, shows excellent electro-catalytic oxidation activity and efficiency and has a good application prospect.

The invention discloses a continuous casting crystallizer nano mold flux and a preparation method thereof. The mold flux is doped with spherical nanoparticles with a volume ratio of 0.1 to 50%. The spherical nanoparticles have high thermal conductivity and good sphericity. , suitable particle size and other advantages, uniform and stable nanofluid can be formed in liquid mold flux, and nanoparticles with sufficiently high interfacial energy and sufficiently low van der Waals action potential in solid mold flux can make nanoparticles The liquid mold flux can maintain a uniform distribution without obvious agglomeration phenomenon, so after adding the mold flux, it forms a continuous casting crystallizer nano-molten flux, which has excellent heat transfer performance and lubricating performance, and can improve the surface and interior of the slab. Quality, suitable for the production of products with special specifications (such as extra-thick plates) and products with special continuous casting processes (such as ultra-high casting speed).