276results about How to "Improve electrolyte resistance" patented technology

The invention discloses an anti-corrosion, anti-puncture and anti-short circuit melting through aluminum-plastic packaging film for lithium battery and a manufacture method thereof. The aluminum-plastic packaging film has a layer structure, comprises at least seven layers which are respectively to be a protecting layer A, an adhesive layer, a coating material layer, an aluminum foil layer, another coating material layer, another coating material layer and a heat-seal layer, and further comprises a protecting layer B arranged on the protecting layer A by the adhesive layer and/or a protecting layer C arranged between the coating material layer and the adhesive layer at the lower surface of the aluminum foil layer through another adhesive layer. According to the invention, the corrosion of electrolyte can be effectively stopped, the anti-puncture intensity, the tensile strength and the wear-resistant property of the aluminum-plastic film can be improved, the yield and the reliability of the battery can be improved, the heat-seal short circuit caused by the improper operation or the abnormal temperature of a machine during heat sealing can be completely avoided, and the service life of the battery can be greatly prolonged, so that the invention is high in reliability.

The invention discloses a paint thickener for printing and a preparation method thereof. The preparation method comprises the following steps: using unsaturated and acidic monomers, crosslinking agent, unsaturated compound and functional monomers to perform inverse emulsion polymerization in hydrocarbon solvent under the action of initiator and oil-soluble emulsifier and performing inverse emulsion, wherein unsaturated and acidic monomers are neutralized before the polymerization. The paint thickener for printing of the invention has excellent thickening ability and electrolyte tolerance performance, high colour yield and soft hand feeling.

Provided is a binder for an electrode mix containing a semi-interpenetrating polymer network (semi-IPN) of polyvinyl alcohol and polyurethane, wherein the polyurethane is mixed to crosslink with the polyvinyl alcohol to form semi-IPN, and a lithium secondary battery comprising the same. The binder has superior adhesion to the electrode, excellent electrolyte resistance and improved elongation percentage, and therefore it is possible to prevent exfoliation or separation of electrode active materials from current collectors which occurs during repeated charge/discharge cycles. As a result, the capacity or power out of secondary batteries can be maintained at a constant level.

The invention belongs to the technical field of an adhesive and adhesive tape for lithium ion batteries and discloses a polyacrylate solvent-type acid-base-resistant pressure-sensitive adhesive tape and a preparation method and application thereof. The preparation method comprises mixing a hard monomer, a soft monomer and a functional monomer, adding a chain transfer agent and a solvent into the mixture, adding an initiator to cause a reaction, adding a curing agent and color paste into the reaction product, and carrying out coating and drying to obtain the polyacrylate solvent-type acid-base-resistant pressure-sensitive adhesive. The mass ratio of the hard monomer, the soft monomer to the functional monomer is (80 to 95): (1 to 15): (2 to 5). The pressure-sensitive adhesive can resist acid and alkali corrosion and is particularly resistant to corrosion of weakly acidic lithium ion battery electrolytes. The pressure-sensitive adhesive and tape have excellent high-temperature and electrolyte resistance, can meet the performance requirements of large power lithium-ion battery tapes and have high cost performance.

Provided is an aqueous liquid composition including a water-based medium containing water, a polymer having at least one type of groups selected from hydroxyl groups and amino groups, and phosphonobutanetricarboxylic acid. The polymer is at least one polymer selected from the group consisting of a polysaccharide, polyamino acid, polyvinyl alcohol, polyallylamine, polyvinylamine, a polyamidine, a polyethylenimine, and their derivatives.

The invention discloses a preparation method of an anion sulfonate type coal water slurry dispersant. A terpolymer is prepared from an anion monomer and a sulfonate monomer as reaction monomers under the action of an initiator and a chain transfer agent through free radical polymerization. By using the dispersant obtained by the preparation method disclosed by the invention, coal water slurry with solid content of 60-70% has excellent dispersion and stabilization effects; and the dispersant is suitable for various coal species, in particular slurrying of coal with poor quality.

The invention belongs to the field of new materials and particularly relates to a preparation method of acrylic thickening agents with inorganic clay as a cross-linking agent. According to the method, a silane coupling agent is adopted for modifying the inorganic clay, vinyl is introduced on the surface of the inorganic clay, and then the acrylic thickening agents are prepared through inverse emulsion polymerization by taking vinyl silane coupling agent modified inorganic clay as the cross-linking agent, an acrylic monomer as a main monomer and a hydrophobic long-chain monomer as a functional monomer for improving the electrolyte resistance of the thickening agents. The thickening agent is low in price and has excellent thickening performance and salt tolerance.

An aqueous liquid composition contains a water-based medium containing water, a polymer having at least one type of groups selected from hydroxyl groups and amino groups, and phosphonobutanetricarboxylic acid. The aqueous liquid composition contains low-cost materials having low environmental load, can retain adequate viscosity even when stored over a long term, and can form a functional coating film having excellent adhesiveness to a base material and superb durability, solvent resistance and waterproofness and capable of exhibiting various functions led by electrical conductivity and hydrophilicity.

The invention relates to a flexible package aluminum-plastic film material for a lithium battery. The flexible package aluminum-plastic film material for the lithium battery comprises a layer structure, wherein the layer structure comprises an aluminum-based layer (AL) in the middle and layers on the inner side and the outer side of the aluminum-based layer, wherein a novel functional adhesive resin layer (AD), a polyester layer (PET), a novel functional adhesive resin layer (AD) and a copolymer propylene layer (CPP) are sequentially distributed on the inner side from inside to outside; a polyester layer (PET), a novel functional adhesive resin layer (AD) and a homopolymer propylene layer (PP) are sequentially distributed on the outer side from inside to outside. The polyester layer (PET) is used as a functional barrier layer and has the stable chemical performance and high electrolyte resistance; the copolymer propylene layer (CPP) is used as a functional material layer and has the high electrolyte resistance, heat-sealing performance and high heat-sealing strength; the novel functional adhesive resin layer (AD) is made of a PP material and has the strong adhesive fastness with the aluminum-based layer (AL), the polyester layer (PET), the homopolymer propylene layer (PP) and the copolymer propylene layer (CPP). The layering can not occur by adopting a casting process technology.

The invention discloses an aluminum-plastic composite film for flexible packaging of a lithium battery. The aluminum-plastic composite film comprises a wear-resistant layer, a first bonding layer, analuminum foil layer, a passivation layer, a second bonding layer having corrosion resistance and a heat sealing layer which are sequentially arranged from the outside to the inside, and the passivation layer comprises, by weight, 100 parts of acrylic resin, 5-15 parts of a chromium-containing compound, 1-5 parts of a phenyltrimethylsilane coupling agent, 1-5 parts of a titanate coupling agent and30-50 parts of water; and the second bonding layer having corrosion resistance includes, by weight, 100 parts of acid-modified polyolefin resin, 1-5 parts of an epoxy system curing agent, 1-5 parts offluorine-containing micro-powder, 10-20 parts of a cyclohexane solvent and 20-40 parts of a butanone solvent. The aluminum-plastic composite film has the advantages of obviously improved electrolyteresistance, stability in bonding among the first bonding layer, the aluminum foil layer, the passivation layer, the second bonding layer having corrosion resistance and the heat sealing layer, high deep-drawing intensity and long service life.

The invention provides a phosphate leather fat liquoring agent and a preparation method thereof. A phosphorylated polyether modified aminosilicone leather fat liquoring agent is prepared by modifying aminosilicone with allyl polyether and P2O5 serving as raw materials. An active group phosphate radical in a molecular structure can react with an amino group in a leather fiber structure, and can be tightly combined with chromium in chrome tanned leather in the form of a coordination bond, so that a phosphorylation product can be stored in leather fiber for a long time, and leather is endowed with certain flame retardance and antistatic property. A certain quantity of hydrophilic oxyethyl groups are introduced onto the molecular structure, so that the properties of water solubility, acid resistance, electrolyte resistance and the like of aminosilicone are improved effectively, and the self-emulsifying property of aminosilicone is enhanced. Aminosilicone is a leather fat liquoring agent per se, and can be used for endowing leather with higher flexibility and fullness and enhancing the physical and mechanical properties such as tear resistance, thickening rate and the like of the leather; and the leather fat liquoring agent with the structure has higher development and application values.

The invention discloses a textile printing thickening agent. The textile printing thickening agent is prepared by processing the following raw materials in parts by weight: 150-220 parts of acrylic acid, 20-60 parts of methacrylic acid, 50-80 parts of acrylamide, 1-10 parts of octadecyl acrylate, 0.01-0.5 part of N,N'-methylene-bisacrylamide, 120-250 parts of white oil or aviation kerosene, 15-50 parts of sorbitan monooleate, 0.2-2 parts of an initiator, 0.01-1 part of sodium hydrogensulfite, 10-50 parts of fatty alcohol polyoxyethylene ether, 5-50 parts of hydrophilic silicon oil and 200-500 parts of a sodium hydroxide solution. The thickening agent has good water holding performance, strong electrolyte resistance capability and high color yield. A production process comprises the following steps of: (1) neutralizing the acrylic acid and the methacrylic acid until the pH value is 5.2-6.5; (2) adding the acrylamide, the N,N'-methylene-bisacrylamide and the initiator to prepare a water phase; (3) mixing the white oil or the aviation kerosene, the sorbitan monooleate and the octadecyl acrylate to form an oil phase; and (4) adding the water phase into the oil phase and emulsifying, and adding sodium hydrogensulfite to carry out a polymerization reaction; and (5) adding the fatty alcohol polyoxyethylene ether and the hydrophilic silicon oil and mixing.

The invention relates to a hard carbon-like graphite cathode material for a high-rate lithium ion battery and a preparation method thereof. The preparation method comprises the following steps of S1,crushing a thermoplastic polymer to obtain polymer powders; S2, dispersing polymer powders in an aqueous solution containing an oxidizing agent and a surfactant for liquid-phase low-temperature oxidation reaction crosslinking, and then pyrolyzing to obtain an oxygen-rich carbon precursor; S3, crushing and graphitizing the oxygen-rich carbon precursor to obtain hard carbon-like graphitized carbon powders; S4, depolymerizing and screening the hard carbon-like graphitized carbon powders to obtain the hard carbon-like graphite cathode material. According to the preparation method, the thermoplastic polymer is used as a raw material, the isotropic oxygen-rich carbon precursor is obtained through liquid-phase low-temperature oxidation crosslinking and pyrolysis treatment, and then the hard carbon-like graphite negative electrode material with low orientation degree and large interlayer spacing is obtained through graphitization treatment, so that the charge-discharge rate performance of thematerial is improved; and when the material is used in the lithium ion battery, the charge-discharge rate can reach more than 15C.

The invention relates to the technical field of adhesive tapes, and particularly relates to a termination adhesive tape and a manufacture method thereof. The termination adhesive tape comprises a base tape and a glue layer located on the base tape, wherein the glue layer is an acrylic glue layer, which is composed of the following raw materials in parts by weight: 1-5 parts of butyl acrylate, 5-12 parts of vinyl acetate, 40-60 parts of ethyl acetate, 20-35 parts of iso-octyl acrylate, 0.5-2 parts of hydroxyethyl methacrylate, 1-3 parts of acrylic acid, 2-4 parts of toluene and 0.1-0.4 part of benzoyl peroxide. The manufacture method sequentially comprises the following steps: A. preparing the acrylic glue: titrating toluene-dissolved benzoyl peroxide used as an initiator to a mixed solution of butyl acrylate, vinyl acetate, ethyl acetate, iso-octyl acrylate, hydroxyethyl methacrylate and acrylic acid at the temperature of 80 DEG C, and ensuring the titration time of 2 hours and self-reaction time of 2.5 hours; and B. applying the acrylic glue on the base tape, sequentially drying, cooling and coiling. The termination adhesive tape provided by the invention has the advantages of low cost, beautiful appearance, simple manufacture process and good electrolyte resistance.

To provide a technique for a battery-packaging material made of a film-form laminate in which at least a base material layer, an adhesive layer, a metal layer, and a sealant layer are laminated successively, wherein: electrolytic solution resistance is further improved by including a polyester film in the base material layer; cracks and pinholes are less likely to be created at the time of forming the polyester-film-including base material layer; and formability is improved. This battery-packaging material is made of a laminate in which at least a base material layer, an adhesive layer, a metal layer, and a sealant layer are laminated successively, wherein: the base material layer includes a polyester film; and the metal layer is an aluminum foil in which the 0.2% proof stress at the time of performing a tensile test in a direction parallel to the rolling direction is from 55 to 140 N/mm².

The invention provides an adhesive for an aluminum battery packaging aluminum plastic film, the aluminum plastic film and a preparation method of the aluminum plastic film. The adhesive at least comprises the following components in percentage by mass: 10-15% of a main resin, 1-3% of a curing agent, 0.5-1%of a tackifying resin, 0.1-0.5% of an anti-hydrolysis agent and 65-90% of a solvent, whereinthe main resin comprises one or more of maleic anhydride modified styrene, polypropylene and a polyolefin elastomer; the curing agent comprises a mixture of one or more polymers in an epoxy resin system. In the aluminum plastic film, the adhesive is coated on the surface of an adhesive layer of a cast polypropylene film, and dried to serve as an inner adhesive layer. The inner adhesive layer is used for dry compounding of an aluminum foil layer of the aluminum battery packaging aluminum plastic film and the cast polypropylene layer, so that aluminum plastic film products have high adhesion andelectrolyte resistance; in addition, the adhesive has a relatively long storage cycle.

The invention belongs to an electrochemical material and discloses a graphene electrode plate, and a preparation method and application thereof. The preparation method of the graphene electrode plate includes: preparing a conductive layer, which is made of materials of alginate and a conductive agent, on a current collector; and preparing a graphene layer, which is made of materials of graphene, a conductive agent and the alginate, on the surface of the conductive layer which undergoes a drying process and performing a dying process and then obtaining the graphene electrode plate. In the preparation method for the graphene electrode plate, uniform carboxyl groups are distributed evenly on a chain structure of the alginate and the carboxyl groups in the alginate are capable of forming chemical bonds with hydroxyl groups on different graphene-plate layers so that a bonding force between the graphene plate layers is reinforced and conductivity between the graphene plate layers is improved and thus the rate performance is improved; and low reaction activity between the alginate and an electrolyte, and an excellent electrolyte resistance characteristic reduce irreversible consumption of the electrolyte on the surfaces of cathode active material particles in a cyclic process so that the long cyclic performance of a cell is ensured.

The invention relates to the technical field of a pressure sensitive adhesive, in particular to an acrylic ester pressure sensitive adhesive, a pressure sensitive adhesive tape and a preparation method of the acrylic ester pressure sensitive adhesive. The acrylic ester pressure sensitive adhesive provided by the invention is prepared from the following raw materials in parts by weight: 8 to 12 parts of 2-ethylhexyl acrylate, 7 to 10 parts of butyl acrylate, 3 to 4 parts of acrylic acid, 4 to 6 parts of vinyl acetate, 3 to 4.5 parts of methyl methacrylate, 3 to 4 parts of hydroxyethyl methylacrylate, 2 to 3 parts of trimethylolpropane triacrylate, 4 to 6 parts of isoprene rubber with double bonds, 4 to 6 parts of SBS elastomers with double bonds, 45 to 60 parts of solvents and 0.3 to 0.6 part of initiating agents. The acrylic ester pressure sensitive adhesive provided by the invention uses the isoprene rubber and the SBS elastomers for modifying the acrylic ester pressure sensitive adhesive, so that the acrylic ester pressure sensitive adhesive has the advantages of acrylic ester, and also has the electrolyte-resistant and high-temperature-resistant performance of rubber; the defectof poor electrolyte-resistant and high-temperature-resistant performance of the existing acrylic ester pressure sensitive adhesive can be effectively overcome.

The invention discloses an insulating fluororubber material for sealing a lithium battery and a preparation method thereof. The insulating fluororubber material comprises the following components in parts by weight: 100 parts of fluororubber, 5-15 parts of an insulating material, 12-30 parts of a reinforcing filler, 0.75-2.5 parts of a peroxide vulcanizing agent, 1.5-3 parts of a vulcanizing aid and 0.8-6 parts of a processing aid. The fluororubber material has excellent electrolyte resistance, volume expansion is less than 35% after the fluororubber material is soaked in an electrolyte, and mass expansion is less than 20%. Meanwhile, the material has good insulating property; the volume resistance of the material is more than 2 * 10 < 12 > omega.cm, the volume resistance is more than 1000M omega (1000V voltage, delayed reading is tested for 3 seconds) after the material is assembled into the sealing material of the lithium battery, the high-temperature compression set is below 20% (200 DEG C * 70 hours), and the sealing and insulating requirements of the lithium ion battery are met.