83results about How to "Accelerates the infiltration process" patented technology

The invention relates to lithium ion battery positive electrode slurry, a preparation method thereof and a lithium ion battery. The positive electrode slurry comprises a positive electrode active substance, a solvent, a composite binder, a composite conductive agent and a dispersing agent, wherein the composite conductive agent is a mixture composed of a conductive agent A and a conductive agent B; the conductive agent A is a conductive agent capable of forming a point-to-point conductive network; the conductive agent B is a conductive agent capable of forming a point-to-line or surface-contact conductive network; and the conductive agent A and the conductive agent B respectively account for 80-90% and 10-20% of the total weight of the conductive agent. According to the method disclosed bythe invention, the positive electrode slurry is processed and modified by changing the adding sequence of different substances in the positive electrode slurry, adjusting the stirring time, the stirring speed and the proportioning ratio and using the dispersing agent, the positive electrode slurry which enables all the components to be uniformly mixed and is relatively good in dispersion, moderate in viscosity and relatively small in fineness can be prepared, and the positive electrode slurry can improve the processing performance of the lithium battery and also can keep the battery to have excellent electrochemical performance.

The invention discloses an uncured polyurethane waterproofing coating and a preparation method thereof, belonging to the technical field of polyurethane waterproofing coatings. The uncured polyurethane waterproofing coating is prepared from the following raw materials in percentage by weight: 13-20% of prepolymer, 30-65% of asphalt, 1.0-1.5% of latent curing agent, 3-15% of compatilizer, 2-9% of thermoplastic elastomer and 0-3% of powder stuffing, wherein prepolymer is a substance synthesized by reaction between polyether and isocyanate. The uncured polyurethane waterproofing coating mainly aims to improve the material proportion and polymerization process of polyurethane, and the problem that a hot-melted asphalt material is needed to be heated by using a machine is solved; the uncured polyurethane waterproofing coating is convenient in construction and good in flowability; the viscosity of the constructed material can be automatically enhanced, so that the constructed material can become an elastic plastic body and a favorable waterproofing layer without internal stresses; in addition, the uncured polyurethane waterproofing coating can be well bonded with a coiled material and can be compounded to be waterproof so as to form a waterproofing layer capable of overcoming tension fracture caused by basement layer cracking and preventing puncturing; the uncured polyurethane waterproofing coating is simple and convenient in process, rapid in construction, free of maintenance, high in working efficiency and capable of becoming the development direction of building waterproofing in the further.

A preparation method of a high-capacity monocrystalline type ternary cathode material comprises steps as follows: S1, a nickel cobalt manganese hydroxide precursor of a core-shell structure is prepared with a coprecipitation method, a loose and porous core is prepared by intermittently introducing a certain quantity of bicarbonate at the initial stage of core making, after core making ends, and loose flaky shells are prepared by substantially reducing the rotation speed and increasing pH; meanwhile, at the core-shell transition stage, a dispersant is added to effectively prevent agglomerationof the shells due to decrease of the rotation speed; S2, the prepared precursor and lithium salt are mixed and calcined once in the oxygen-rich atmosphere at the high temperature, and the monocrystalline type ternary cathode material is obtained. A battery is prepared from the ternary cathode material and has high capacity and good safety performance due to high lithium ion transport efficiency and reduced anisotropy in crystals. The problem of poor capacity of the material because of low lithium ion transport efficiency of monocrystalline type ternary materials is effectively solved. Besides,the monocrystalline type ternary cathode material is prepared through one-time sintering, the preparation procedure is simple, and the production cost is low.

The invention relates to a narrow flow induction coupling chemical vapor deposition (CVD) densification method for rapidly preparing a carbon/carbon composite material crucible. The method comprises the steps of: adopting a chemical vapor deposition technology, under the synergistic effect of narrow slit airflow and inductive coupling, leading mixed gas of small-molecule hydrocarbon and N2 gas to a high-temperature reaction chamber, adsorbing the small-molecule hydrocarbon at the surface of an inner hole of a carbon fiber crucible precast body or a low-density carbon/carbon composite material crucible billet body, and releasing pyrolytic carbon at a high temperature, depositing the pyrolytic carbon at the surface of a hot carbon fiber, continuously improving the density of the billet body, and rapidly obtaining the compact carbon/carbon composite material crucible. By adopting the method disclosed by the invention, the crusting phenomenon of the surface is effectively restrained under the synergistic effect of narrow slit airflow and inductive coupling measures; high deposition temperature and reaction gas furnace pressure are permitted; inner and outer balanced densification is more rapidly carried out; the quality is improved; the cycle is shortened; and the cost is also reduced.

The invention discloses a lithium ion battery anode material with surface hydrophobicity and a preparation method of the lithium ion battery anode material, relates to a lithium ion battery anode material prepared according to a surface modification technology and a preparation method thereof, and aims to solve the problems that the conventional anode material is poor in recycling performance, storage performance and compatibility with an electrolyte. The lithium ion battery anode material with the surface hydrophobicity has an organic hydrophobic layer on the surface, wherein the hydrophobic layer has the thickness of 0.5-20nm and the mass content of 0.1-10%; the preparation method of the lithium ion battery anode material with the surface hydrophobicity comprises the following steps: uniformly mixing an organic matter with hydrophobicity and an organic solvent, stirring together with an anode material at 30-80 DEG C, carrying out a reaction to obtain a mixture, filtering the mixture to obtain a solid filter cake, and treating the solid filter cake according to two temperature gradients to obtain the lithium ion battery anode material with the surface hydrophobicity. The lithium ion battery anode material with the surface hydrophobicity, prepared by the preparation method provided by the invention, is applied to a lithium ion battery.

The invention discloses a perforated positive plate of a lithium ion battery. The perforated positive plate comprises a current collector coated with a lithium-iron oxide layer, and active substance layers arranged on upper and lower surfaces of the current collector, wherein uniform diffusion through holes are formed on the active substance layers and the current collector. The preparation methodcomprises the following steps: firstly coating a layer of Li5FeO4 on the aluminum foil surface to provide redundant lithium source for the battery, thereby retarding the lithium ion with the negativepole first effect to form irreversible SEI film consumption and enhancing long circulation performance; secondly, increasing the energy density of the battery by using the positive electrode with high compaction and high surface density; and finally forming a perforated pole plate, wherein the electrolyte can sufficiently enter the internal of the active substance to increase the infiltration ofthe electrolyte and retarding the expansion of the active substance, and the perforated positive plate can be applied in the battery industrialization in large scale. The conventional perforated aluminum foil is obtained by coating after perforating, and the perforated positive plate is obtained by perforating after coating, so that the surface density of the active substance is higher, and the energy density of the battery is 30% higher in relative to the conventional perforated pole plate.

The invention relates to an energy-containing fragment with nanometer Al/M<x>O<y>/oxidizing agents.The energy-containing fragment comprises, by weight, 10-30% of nanometer aluminum powder, 30-60% of transition metal oxide (the M<x>O<y>), 10-40% of the oxidizing agents, 1-5% of ferrocene, 1-7% of high explosive and 3-8% of mixed binders.The energy-containing fragment has the advantages that the energy-containing fragment is high in energy density and fire setting capacity, good in safety performance and easy to ignite, immediate reaction can be prevented when the energy-containing fragment is driven by explosive, but violent chemical reaction can be carried out in penetration procedures, extremely high-temperature heat can be released, and high-temperature hot reaction products with flowability can be generated.

The invention provides a preparation method of a carbon/carbon nanotube coated lithium iron phosphate composite material by in situ synthesis, and relates to the technical field of battery materials. The preparation method provided by the invention comprises the steps of weighing raw materials of a lithium source, iron powder, a phosphate and a carbon source; first performing ball-milling on the iron powder and the phosphate and adding hydrogen peroxide; and then adding the lithium source and the carbon source to obtain a slurry, drying and sintering under the protection of reducing/inert gas to obtain the composite material. According to the preparation method provided by the invention, the carbon/carbon nanotube coated lithium iron phosphate composite material is prepared by employing an in-situ synthesis method, so the heat treatment time is short; the composite material has relatively high carbon coating rate, stable electrochemical property and relatively good consistency, the cycle performance and the rate performance are greatly improved, the whole preparation process is simple, and the preparation method has the advantages of safety, high efficiency, low cost and environmental protection, etc.

The invention discloses a closed formation method of a cylindrical lithium titanate battery. The closed formation method is applicable to a cylindrical lithium titanate battery with a negative electrode material being a lithium titanate material. The closed formation method comprises the steps of measuring moisture content of a roll core pole plate of the cylindrical lithium titanate battery, placing the dispensed and pre-packaged cylindrical lithium titanate battery in a high-temperature room to stand after liquid injection, removing sealing glue after the pole plate is fully immersed and stabilized, vacuumizing and discharging air, sealing a steel ball, and performing secondary dispensing and sealing; placing the lithium titanate battery on a formation cabinet for battery formation processing, wherein the formation process is divided into two stages under a normal-temperature environment, constant-current charging is performed with an I1 current in the first stage until a voltage reaches V1, constant-current and constant-voltage charging is performed with a small current I2 in the second stage, a cutoff voltage is V2, and a cutoff current is I3; and placing the lithium titanate battery in a normal-temperature environment condition for aging. By the method, the closed formation of the cylindrical lithium titanate battery is achieved, gas generation during the formation processand the circulation process of the lithium titanate battery is prevented, and industrial production on a large scale is easy to achieve.

The invention relates to a pole piece, a preparation method thereof and a lithium ion battery. According to the invention, the positive/negative pole piece is subjected to shape-setting cold pressingby adopting a pressing roller with a specific shape, the pressing roller is provided with hemispherical or football-shaped bumps so as to enable the pressed material to have pits which are continuously and uniformly distributed; a pore-forming agent is applied to the surface of the cold-pressed pole piece by means of transfer coating for pore forming so as to obtain the pole piece with a gradientporosity structure. The preparation method of the pole piece with the gradient porosity structure has the advantages that the operation is simple, feasible and efficient, and a solution is provided for the problem of thick pole pieces in the development process of high-specific-energy batteries. According to the pole piece with the gradient porosity structure, the infiltration and absorption effects of an electrolyte can be improved, the specific surface area of the material is increased, the ion/electron transmission rate is increased, the resistivity is reduced, the high energy density of the designed material is achieved, and then the requirements of a new energy automobile for a power battery are met.

The invention belongs to the technical field of low-cost manufacturing of high performance composite materials, and relates to a technical method using a low resin content fiber-reinforced prepreg for preparation of a composite material. First of all, resin content in the prepreg can be regulated by precise control of the concentration of a resin solution in a wet-method prepreg preparing process, and under the premises of ensuring structural integrity and technical operability of the prepreg, fiber tows are partly wetted with resin to obtain the low resin content prepreg; then by combination with a mold-closing RTM (resin transfer molding) technology and in dependence on injection and flowing of low viscosity RTM resin, the reinforced fiber can be finally and completely wetted to obtain the high performance composite material which has good paving technical properties and high fiber collimation degree and fiber volume fraction of both the prepreg and the composite material and can combine manufacturing flexibility of the RTM technology.

The invention relates to a high-strength pultruded profile which comprises the following components: 20-30 wt% of resin matrix, 30-40 wt% of glass fiber and 30-40 wt% of multiaxial sized raw fabric. The high-strength pultruded profile is characterized in that the glass fibers are uniformly distributed inside the resin matrix to enhance the axial strength of the pultruded profile; the multiaxial sized raw fabrics are respectively formed by previously dipping the fabric in the resin matrix and carrying out semi-curing, and respectively positioned on the surface and in the middle of the pultruded profile; the multiaxial sized raw fabric on the surface is used for protecting the surface of the pultruded profile and enhancing the transverse strength of the pultruded profile surface; and the multiaxial sized raw fabric in the middle is used for enhancing the overall transverse strength of the pultruded profile. The invention also relates to a preparation method of the high-strength pultruded profile.

The invention provides a preparation method of a molybdenum trioxide-polypyrrole-polyaniline ternary composite material. The method comprises the following steps: 1, preparing molybdenum trioxide nanobelts through a hydrothermal technology; 2, carrying out in situ growth of polypyrrole on the molybdenum trioxide nanobelts to obtain a molybdenum trioxide-polypyrrole binary composite material; and 3, carrying out in situ growth of polyaniline on the surface of the molybdenum trioxide-polypyrrole binary composite material used as a template in order to obtain the molybdenum trioxide-polypyrrole-polyaniline ternary composite material. The molybdenum trioxide-polypyrrole-polyaniline ternary composite material prepared in the invention can be used in high-performance super capacitors, lithium ion batteries, solar batteries and other novel energies as an ideal electrode material.

The invention relates to a lake asphalt/SBR (styrene butadiene rubber) composite modifier and a preparation method and application thereof. The lake asphalt/SBR composite modifier is a pre-dispersed material formed by the lake asphalt, polymer SBR and a compatilizer via melt blending, and the modified asphalt can be obtained by melt blending of petroleum asphalt and a stabilizer. The lake asphalt/SBR composite modifier is the pre-dispersed material capable of remarkably improving capacities of high-temperature deformation, low-temperature cracking resistance and anti-water damage, the pre-dispersed material is then added to the petroleum asphalt, and the lake asphalt/SBR composite modified asphalt uniform in dispersion and less prone to layered segregation by the aid of the advantage of good compatibility of the pre-dispersed material and the petroleum asphalt; the modified asphalt is applied to construction of heavy traffic asphalt pavement of high-temperature, moist and rainy regions, asphalt pavement diseases can be remarkably reduced, pavement maintenance cost is lowered, and service life of the asphalt pavement is prolonged.

The invention discloses a method for preparing a suspension micro-sensitive structure based on an aluminum sacrificial layer process. The method comprises the following steps of: introducing a sacrificial layer into a three-layer suspension micro-sensitive structure to restrict a micro-sensitive suspension mass block during the processing, and connecting the suspension micro-sensitive structure and bulk silicon by using an aluminum light film so as to avoid influence of subsequent processing on the suspension structure; removing the sacrificial layer by wet etching; and finally replacing an etching solvent with clean water and ethanol, and drying. The method effectively ensures the integrity and mobility of the suspension micro-sensitive structure without changing the conventional process flow, does not reduce the performance of a micro-mechanical sensor because the mechanical restriction is not increased, reduces the process difficulty, improves the yield and can be widely used for processing various silicon micro-components with the suspension micro-sensitive structure.

The invention discloses application of aplysin in preparation of a medicine for treating glioma, aiming at researching the anti-tumor activity of aplysin to glioma. The MTT (Methyl Thiazolyl Tetrazolium) experiment shows that the inhibition ratio of aplysin to C6 cell is increased along with the raise of the concentration of aplysin; after the concentration is raised beyond 80mcg/m, the inhibition ratio of C6 cell does not raise obviously, namely, the most effective anti-tumor concentration of aplysin is 80mc/ml; the best effect appears in 48 hours in light of the action time; with the prolonging of the time, the cell inhibition ratio does not raise obviously. The animal experiment result shows that after the dose of aplysin is increased, the life time of a rat is prolonged, the weight of glioma is reduced, and the infiltration of lymphocyte is improved; 40mg/kg.bw is the best dose for reaching the best effect. The experiment shows that aplysin belongs to natural marine drugs and has small toxic and side effects, so that aplysin can be used as the medicine for treating glioma; aplysin is good in market application prospect.

The invention discloses heat-resistant unsaturated polyester resin. The heat-resistant unsaturated polyester resin comprises the following raw materials in parts by weight: 30-40 parts of phthalic anhydride, 5-15 parts of maleic anhydride, 20-40 parts of m-phthalic acid, 2-10 parts of fumaric acid, 8-16 parts of lauric acid, 1-6 parts of benzoic acid, 12-25 parts of tung oil anhydride, 50-80 parts of diglycol, 10-30 parts of propylene glycol, 5-15 parts of styrene, 20-40 parts of alpha-methyl styrene, 1-4 parts of a stabilizer, 0.1-0.8 part of hydroquinone, 5-15 parts of epoxy resin, 1-5 parts of nano-silicon dioxide and 1-4 parts of modified sodium acrylate. The heat-resistant unsaturated polyester resin has good heat resistance and antibacterial and anti-mold effects, high mechanical strength and remarkable aging resistance.

The invention discloses a crusher wear resisting hammerhead for a high-toughness impact resisting cast-penetrated composite ore. The crusher hammerhead consists of a basal body, and a cast-penetrated layer on the surface of the basal body, wherein the basal body consists of the following components in percentage by weight: 0.3-0.5% of C, 1.0-1.5% of Si, 0.5-1.0% of Mn, 14-16% of Cr, 0.8-1.0% of Mo, 0.5-1% of Cu, 0.05-0.1% of B, 1-2% of Al, S not more than 0.05%, P not more than 0.05%, and the balance of Fe. The crusher hammerhead is excellent in wear resistance, toughness and impact resistance, is few in casting defects, is high in appearance quality, and is excellent in durability.

The invention discloses a multifunctional floor waxing machine. The machine includes a shell, and a protective cover is fixed at the upper end of the shell; the upper end of the protective cover is rotationally connected with a pull rod; a plurality of air holes are formed in the side wall of the protective cover, a fixing frame is installed on the inner wall of the shell, a double-head motor is fixed to the center of the fixing frame in a penetrating mode, a transmission shaft is fixed to an output shaft at the lower end of the double-head motor, a partition plate is fixed to the inner wall of the shell, and the transmission shaft penetrates through the partition plate and is rotationally connected with an installation block through a one-way bearing. The multifunctional floor waxing machine has the advantages that when the material storage box rotates, the closing plate slides under the action of centrifugal force, so that the output pipe is communicated with the interior of the material storage box, wax liquid flows out, waxing operation is achieved, when the material storage box stops rotating, the closing plate closes the output pipe under the action of elastic force of the closing spring, the wax liquid is reserved, and random flowing of the wax liquid is avoided.

The invention discloses a method for preparing a lightweight energy-saving building wall material by using high-content steel slag, and solves the problems of low utilization rate, low additional value and low consumption of the existing steel slag. The preparation method comprises the following steps: mixing 40-50 parts of steel slag, 10-20 parts of clinker, 0-20 parts of blast furnace slag, 40-50 parts of fly ash and 5 parts of desulfurized gypsum powder; performing mixing, adding 0.02-0.05% of a grinding-aid early strength agent, and performing fine grinding; adding 0-2% of reinforcing fibers into the mixture after fine grinding; mixing with foaming slurry, and adding a water reducing agent; after uniform stirring, pouring the mixture into a mold; curing the test piece for 1 day under the condition of constant humidity of 30 DEG C, performing demolding, performing curing for 3-6 days under the condition of constant humidity of 35-65 DEG C, and performing natural curing for 28 days to prepare the qualified light energy-saving wall material. The solid waste utilization rate can reach 90%, and the steel slag utilization rate can reach 42.5% or above.