50results about How to "Reduce crystallinity" patented technology

The invention discloses a preparation method and application of an iron-doped molybdenum disulfide / polymer-based composite solid-state electrolyte, and relates to the technical field of solid-state batteries. After the iron element is doped, defects are introduced into the structure of the modified molybdenum disulfide, phase change is induced, dissociation of the lithium salt is promoted through synergism of the modified molybdenum disulfide and the iron element, and more free lithium ions are released; and meanwhile, the proportion of an amorphous region of the polymer electrolyte is increased, so that the ionic conductivity is improved, and the oxidation resistance is enhanced. In addition, the iron-doped molybdenum disulfide can effectively catalyze decomposition of lithium salt anions, and construction of a uniform and stable solid electrolyte interface (SEI) layer on the surface of the electrode is facilitated. The all-solid-state lithium metal battery assembled based on the modified solid electrolyte shows excellent electrochemical performance.

The invention relates to the technical field of electrolyte, in particular to a thioether cross-linked solid polymer electrolyte membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: taking N, N-dimethylformamide, respectively adding 3, 6-dioxa-1, 8-octane dithiol and triglycidyl isocyanurate, and uniformly stirring to obtain a mixed solution; adding bis (trifluoromethylsulfonyl) imide lithium into the mixed solution, putting magnetons on a magnetic stirrer, and completely dissolving the magnetons to obtain a precursor solution; and pouring a proper amount of the precursor solution into a polytetrafluoroethylene mold, spreading, and carrying out cross-linking polymerization in a blast oven to form the film. The three-dimensional thioether cross-linked network structure has a large number of weakly coordinated thioether groups, dissociation of lithium salt can be promoted, a large number of free Li < + > is generated, the number of Li < + > is increased, meanwhile, the crystallinity of a polymer is remarkably reduced, the ionic conductivity is improved, the mechanical stability of a film can be improved, and the service life of a battery is effectively prolonged.

The invention discloses a bimetallic asymmetric reduction Schiff base catalyst for synthesizing ethylene carbonate and a preparation method of the bimetallic asymmetric reduction Schiff base catalyst. According to the catalyst, a diamine compound is subjected to selective single-side protection, the imine reduction position is controlled, and a bimetallic active center is introduced; the controllable synthesis of a product for reducing the outer side imine and a product for reducing the inner side imine is realized; the obtained product is recrystallized to obtain a monoimine-monoamine type ligand with a clear asymmetric structure, the monoimine-monoamine type ligand and metal salt form a bimetallic catalyst, and the catalyst generates a synergistic effect through double active sites and shows high catalytic activity and excellent product selectivity.

This invention belongs to the field of hard carbon technology, specifically relating to a bamboo-based and lignin-based hard carbon composite material, its preparation method, and its applications. The process involves pretreating raw materials to obtain pretreated material; pretreating the pretreated material with an acidic oxidant to obtain acidic oxidant pretreated material; pre-oxidizing the acidic oxidant pretreated material to obtain pre-oxidized material; pre-carbonizing the pre-oxidized material under a protective atmosphere to obtain pre-carbonized material; pulverizing the pre-carbonized material to obtain pulverized material; acid washing followed by water washing to obtain purified material; soaking the purified material in acid, filtering, and drying to obtain soaked material; mixing the soaked material with a modifier, and high-temperature coating and carbonizing under a protective atmosphere to obtain bamboo-based coated hard carbon or lignin-based coated hard carbon. Mixing the two types of hard carbon and carbon coating yields a bamboo-based and lignin-based hard carbon composite material, which is used in negative electrode sheets and batteries. When applied to batteries, the hard carbon composite material of this invention can improve battery energy density.

The polymer electrolyte membrane for a lithium secondary battery according to the present invention comprises a copolymer. The copolymer has: a main chain comprising a first repeating unit and a second repeating unit; a fluoroalkyl group which is bonded to the main chain by a side chain; and a polymer segment that is bonded to the main chain in a side chain and contains oxygen. The lithium secondary battery according to the present invention comprises the polymer electrolyte membrane for a lithium secondary battery.

The application discloses a polymer electrolyte with three-dimensional network fillers and a preparation method thereof, and belongs to the technical field of lithium ion batteries. The application is based on a synergistic design concept of premixed filler guiding in-situ network growth, and hydrolysis of tetraethyl orthosilicate (TEOS) is regulated by formic acid. The premixed nano-SiO2 particles are used as nucleation sites to induce directional growth of SiO2 generated in-situ on the surface of the nano-SiO2 particles and mutual crosslinking, and the fillers form a three-dimensional crosslinked network structure in the polymer matrix. The application overcomes problems of easy agglomeration of fillers, incomplete crystallization inhibition and incomplete crosslinking of a single in-situ growth network due to lack of nucleation sites in a traditional physical blending method, and realizes synergistic enhancement of mechanical strength and ion transmission efficiency.

This invention belongs to the field of lithium metal battery technology, specifically relating to a fluorinated phase-separated polymer ion gel electrolyte, its preparation method and application, and lithium metal batteries. The fluorinated phase-separated polymer ion gel electrolyte provided by this invention comprises a solid phase and a liquid phase; the solid phase is a copolymer of a fluorinated acrylate monomer and a crosslinking agent containing carbon-carbon double bonds; the liquid phase comprises an ionic liquid and a lithium salt dissolved in the ionic liquid. Compared to liquid electrolytes and traditional SPEs, the fluorinated phase-separated polymer ion gel electrolyte provided by this invention has high ionic conductivity, mechanical strength, interfacial stability, and safety. It can effectively suppress the growth of lithium dendrites and adapt to large volume changes, avoiding short circuits and thermal runaway in lithium metal batteries under conditions of overcharging, over-discharging, or mechanical impact.

The application discloses a preparation method and application of a metal boride composite metal single element and sulfur composite nanomaterial, relates to the technical field of energy materials, and comprises the following steps: dissolving a metal salt in methanol, quickly adding a 2-methyl imidazole aqueous solution, and preparing a MOF precursor; dispersing the MOF precursor in a methanol deionized water solution, adding a reducing agent solution, and preparing a metal boride material; dispersing the metal boride material in a metal salt aqueous solution at room temperature, adding a sodium hydroxide solution, and calcining the product in an inert gas and a reducing gas atmosphere in sequence to obtain a metal boride@metal single element composite material; and mixing and calcining the obtained metal boride@metal single element composite material and elemental sulfur according to a mass ratio of 1:1-4. The material has good lithium polysulfide adsorption capacity, accelerates the kinetic conversion of polysulfides, and can improve the stability and actual service life of a lithium-sulfur battery.

The application belongs to the field of engineering plastics, and particularly relates to long-chain polyamide resin with easy processing and high tensile property, and a preparation method and application thereof. The long-chain polyamide resin comprises the following raw material components: component a: aliphatic carboxylic acid compound component; component b: polyamine compound component; and component c: a compound with a structure shown in the following formula (1), wherein n and m can be any number between 1 and 10. The long-chain polyamide resin of the application introduces structural diacid with an asymmetric benzene ring structure, utilizes the asymmetric structure to reduce the crystallinity of the material, and introduces the benzene ring structure to improve the mechanical property of the polyamide material, so that the low processing temperature is realized from the polyamide material component itself, the energy consumption is reduced, and the mechanical property of the polyamide material is ensured. The problem that the processing temperature and mechanical property of the polyamide material and the processing energy consumption are difficult to be considered in the prior art is solved.

This invention discloses a heat- and impact-resistant protective conduit for MPP cables and its preparation method, relating to the field of polymer materials technology. The components, by weight, include: 20-22 parts of a toughening dispersion made from anhydrous ethanol and terminally epoxy-terminated hyperbranched polysiloxane; 33-35 parts of a boron-nitrogen co-doped carbon dot made from citric acid, boric acid, and urea, first compounded with phytic acid and piperazine, then compounded with modified zirconium phosphate prepared by hexadecyltrimethylammonium bromide intercalation, and then modified with silane coupling agent KH-560 to form a flame retardant synergist; 12-14 parts of polyolefin elastomer; 2-2.5 parts of magnesium aluminum hydrotalcite; 0.2-0.24 parts of antioxidant; 0.2-0.3 parts of calcium stearate; 0.2-0.3 parts of polyethylene wax; and 100-120 parts of polypropylene. The introduction of the flame retardant synergist and other raw materials in this invention effectively improves flame retardancy, aging resistance, impact resistance, low-temperature resistance, and heat resistance.

The present application relates to the technical field of gel electrolyte for supercapacitor, in particular to a gel electrolyte based on lysozyme amyloid fibers and application thereof. The ion conductivity of the conventional plant protein-based gel electrolyte is poor, and the electrical performance needs to be further improved. In view of the above problems, the present application provides a gel electrolyte based on lysozyme amyloid fibers. The lysozyme in the formula self-assembles into amyloid fibers under acidic conditions, and the surface of the amyloid fibers is rich in polar groups such as hydroxyl, carboxyl and amino groups, which can effectively promote the dissociation of lithium salt. At the same time, the three-dimensional network structure formed by the self-assembly of the fibers. Glycerol as a small molecule plasticizer inserts between the polymer chains. Lithium perchlorate and other lithium salts can provide high concentration of free lithium ions due to the large anion volume and low dissociation energy. The above components synergize and jointly act, effectively improving the comprehensive electrical performance of the gel electrolyte.

This invention discloses a high-performance polymer electrolyte based on a functionalized fluorinated ether diluent and its preparation method, relating to the field of electrochemical energy storage materials technology. The high-performance polymer electrolyte comprises: a polymer matrix, a lithium salt, an organic dispersion solvent, and a functionalized fluorinated ether diluent. By introducing a fluorinated ether diluent with a specific structure, this invention synergistically regulates the crystallization behavior of the polymer matrix and the lithium-ion solvation structure, solving core problems in traditional polymer electrolytes such as low ionic conductivity, poor interfacial stability, and lithium dendrite growth. The resulting electrolyte possesses high ionic conductivity, high lithium-ion transference number, and excellent interfacial stability, making it suitable for high-energy-density lithium metal batteries.

The invention discloses a method for improving interfacial compatibility of filler in polyvinylidene fluoride-based composite solid electrolyte and a polymer matrix, which comprises the following steps: mixing isocyanate fatty ester with a siloxane coupling agent APTES, and carrying out hydrolysis reaction in a weakly acidic solvent to obtain an acylation modified APTES organic solution; the preparation method comprises the following steps: adding inorganic filler LLZTO particles into an acylation-modified APTES organic solution, carrying out surface modification, separating, washing and drying to obtain surface-modified LLZTO particles; adding a lithium salt, polyvinylidene fluoride and the surface-modified LLZTO particles into an organic solvent, and uniformly stirring and dispersing to obtain composite electrolyte slurry; and carrying out casting molding on the composite electrolyte slurry, and carrying out drying treatment to obtain the PVDF-based composite solid electrolyte membrane. The preparation method is simple, and the composite solid electrolyte with high ionic conductivity can be prepared through a solution pouring method.

This invention discloses a solid-state electrolyte and a solid-state battery for the field of backup power and energy storage, belonging to the field of battery manufacturing technology. The solid-state electrolyte for backup power and energy storage comprises the following components by weight: 30-40 parts polymer matrix, 18-30 parts lithium salt, 0.8-1.3 parts lithium salt promoter, 1-4 parts binder, 18-26 parts tetrahydrofuran, and 0.8-2.3 parts conductive additive. The solid-state electrolyte prepared using the above substances exhibits excellent ionic conductivity, electrochemical stability, and safety, and its parameters are suitable for backup power and energy storage applications.

This invention discloses a polyvinylidene fluoride (PVDF) resin, its preparation method, and its application. The preparation method includes the following steps: (1) preparing PVDF resin emulsion particles by emulsion polymerization of PVDF monomer; (2) adding a reducing agent and a fluorinated solvent to the obtained PVDF resin emulsion particles; (3) adding PVDF monomer, a dispersant, and an oil-soluble initiator to the emulsion obtained in step (2), and then heating to carry out a suspension polymerization reaction; (4) separating the product after the suspension polymerization is completed to obtain the PVDF resin. The PVDF resin of this invention has high flexibility, high product purity, and high adhesion.

The application provides a modified polyethylene oxide solid electrolyte and a preparation method and application thereof, and the preparation method comprises the following steps: (1) mixing polyethylene oxide, a reducing agent and a solvent to obtain a polyethylene oxide mixed solution; (2) after the polyethylene oxide mixed solution is heated to a reaction temperature, an initiator solution and a negative electrically active monomer are respectively added dropwise into the heated polyethylene oxide mixed solution to obtain the modified polyethylene oxide solid electrolyte. The polyethylene oxide is modified in the application, a branched component is introduced, and the intermolecular hydrogen bond effect is destroyed, so that the crystallinity of the polyethylene oxide can be reduced, and the ionic conductivity of the polyethylene oxide is improved.

The application provides a kind of flame-retardant low-temperature easy-dyeing regenerated polyester and its preparation method, comprising the following steps: (1) the system to be recycled including waste PET is subjected to alcoholysis treatment, to obtain alcoholysis product;The alcoholysis product includes bis(2-hydroxyethyl) terephthalate;(2) the regenerated raw material system including the alcoholysis product, dihydric alcohol, flame retardant, meta-aromatic dibasic acid and its derivatives, polyether, thermal decomposition protective agent is mixed, and esterification reaction, polymerization reaction are sequentially carried out, to obtain the flame-retardant low-temperature easy-dyeing regenerated polyester.The flame-retardant low-temperature easy-dyeing regenerated polyester provided by the application has good flame-retardant effect and dyeing performance.

The application belongs to the technical field of engineering plastics, and particularly relates to the field of ultrasonic welding PET compositions, and discloses a PET resin composition which comprises the following components: 60-75 parts of PET resin, 5-15 parts of PETG resin, 2-5 parts of a toughening agent, 18-25 parts of glass fiber, and 0.2-0.8 parts of a nucleating agent. The application provides a PET composition with high ultrasonic welding strength, so that the integrity and overall strength of a PET product after ultrasonic welding are improved, and the cracking and separation of the welding position can be effectively avoided. The PET resin composition of the application is applied to a PET resin material product which needs to be ultrasonically welded, and the related product prepared by the PET resin composition has excellent ultrasonic welding strength and excellent mechanical properties.

The invention belongs to the technical field of bamboo processing and modification, and particularly relates to a method for softening bamboo through cooperation of a metal ion-based eutectic solvent and high-temperature steam based on an in-situ modification mechanism. The method comprises the following steps: preparing a metal ion-based eutectic solvent (MDES) taking metal salt as a hydrogen bond acceptor; the bamboo wood is placed in the solvent to be soaked, and the solvent permeates into cell walls; and after the bamboo is taken out and surface floating liquid is wiped off, high-temperature steam treatment is directly carried out without water washing. According to the method, a crystalline region is destroyed by virtue of strong coordination of metal ions and cellulose, and meanwhile, lignin is induced to generate in-situ depolymerization by virtue of MDES in a high-temperature water vapor environment, so that a low-molecular-weight lignin segment is generated. The method solves the problems of low bamboo yield and damaged mechanical strength caused by the fact that a large amount of lignin is removed in an existing chemical softening technology, through an in-situ plasticizing mechanism, deep softening is achieved while the high yield of the bamboo is kept, the anti-bending elastic modulus is greatly reduced, and the deformation machining performance of the bamboo is improved.

The invention discloses composite point coating slurry and a preparation method and application thereof.The composite point coating film comprises a base film and a coating on the base film, the coating is obtained by coating the composite point coating slurry, and the method for preparing the composite point coating slurry comprises the steps that ceramic slurry and organic slurry are mixed to be uniform to obtain the composite point coating slurry, the ceramic slurry comprises a ceramic material, the organic slurry comprises an organic material, the ceramic material comprises a first dispersant, ceramic powder, a wetting agent, a first thickening agent and a first binder, and the organic material comprises a second dispersant, an organic polymer, a second thickening agent and a second binder. The composite spot-coating slurry and the matrix arrangement of the spot-coated coating points are cooperated to reduce the risk that the particles block the holes, the air permeability of the diaphragm is improved, and the internal resistance of the lithium battery is reduced.

The invention provides an all-carbon skeleton polyarone cross-linked polymer-based solid electrolyte membrane and a preparation method thereof, and relates to the technical field of polymer-based solid electrolyte. The structural formula of the all-carbon skeleton polyarone cross-linked polymer-based solid electrolyte disclosed by the invention is as shown in the following formula (I), the polymer electrolyte membrane material has good affinity with a positive electrode and a negative electrode of a lithium battery, high interface stability, low crystallinity, low porosity and small aperture, can simultaneously realize high ionic conductivity and mechanical strength, can also realize good flame retardance, and greatly enhances the safety performance of the battery.

The application discloses a method for extracting alumina from industrial solid waste red mud. The method comprises the following steps: mixing the red mud with a composite additive composed of sodium carbonate, potassium sulfate and limestone, wet ball milling the mixture until the particle size of the mixture reaches D90≤74 μm, drying the obtained slurry until the water content is less than 5%, and sintering at 950-1050 ℃ to obtain sintered clinker; leaching and separating the sintered clinker in hot water at a liquid-solid ratio of 10:1-25:1 and at 65-95 ℃ to obtain an aluminum-containing filtrate; introducing CO2 into the filtrate to perform carbonization, and performing aging and solid-liquid separation to obtain aluminum hydroxide; and then performing washing, drying and calcination to obtain an alumina product. By introducing potassium sulfate as a fluxing agent, the transformation of inert aluminum mineral phases is promoted, the sintering temperature can be reduced by 50-100 ℃, the time can be shortened by 30-50%, the process energy consumption is low, the aluminum extraction efficiency is as high as 88% or more, and a brand-new path is provided for large-scale resource utilization of the red mud.

The invention discloses a functional composite fiber diaphragm and a preparation method and application thereof.The preparation method of the functional composite fiber diaphragm comprises the steps that the two faces of a fiber membrane are coated with the same composite solution respectively, composite coatings are obtained on the two faces of the fiber membrane respectively, and the functional composite fiber diaphragm is obtained, the fiber membrane is a polyimide fiber membrane containing a perovskite type oxide filler, the composite solution comprises a lithium salt, a metal organic framework material, polyvinylidene fluoride and a first solvent, the metal organic framework material is one of a zinc-based metal organic framework and a bismuth-based metal organic framework, and the perovskite type oxide filler is lanthanum cobaltate. A fiber membrane is prepared by using an electrostatic spinning technology and a high-temperature calcination method, and the functional composite fiber diaphragm is obtained by coating two surfaces of the fiber membrane with a composite solution. The functional composite fiber diaphragm has excellent thermal stability, and the battery assembled by the functional composite fiber diaphragm has excellent electrochemical performance.

The application discloses a polyvinyl alcohol chemical-proof glove and a manufacturing method thereof, and belongs to the field of glove materials and processing technology. In order to solve the problem of uneven flexibility and thickness of the existing gloves, the polyvinyl alcohol chemical-proof glove and the manufacturing method thereof are provided, and the glove comprises an inner lining layer and a PVA outer layer, and a water-based latex blending layer is formed between the PVA outer layer and the inner lining layer. The water-based latex blending layer is made of raw materials in the following weight proportions: PVA: 10-90; water-based latex: 140-200; glycerol: 8.0-15; polyglycerol: 5.0-15; high-molecular water-absorbing resin I: 2.0-4.0; defoaming agent: 0.5-1.5; bridging agent I: 0.5-2.0; and water: 300-400. The application can effectively reduce the probability of hydrogen bond formation between PVA molecular chains, destroy the regular structure of the film, reduce the crystallinity, thereby reducing the hardness of PVA, and improving the softness and thickness uniformity of the glove.

This invention provides a Cr2Se3 single crystal and its preparation method, relating to the field of crystal materials technology. The Cr2Se3 single crystal preparation method, from raw material proportioning and powder preparation to single crystal growth, involves coordinated steps to suppress impurity introduction and impurity phase formation, while simultaneously promoting ordered atomic arrangement and eliminating lattice vacancies and dislocations, resulting in a Cr2Se3 single crystal with good single-phase properties, high crystallinity, and extremely low defect density. The high-purity, low-defect single crystal structure ensures its semiconductor transport properties and antiferromagnetic order; it also eliminates interference from impurity scattering and lattice distortion, optimizing the magnetic field's control over the magnetic moments of Cr atoms, enabling the single crystal to exhibit a strong CMR effect approaching -100%. Furthermore, the coordinated steps ensure consistency in size, phase composition, and structural integrity of the prepared Cr2Se3 single crystal, significantly improving the success rate, process controllability, and repeatability.

This application provides a composite solid electrolyte comprising a polymer matrix, a metal salt, and fast-ion conductor ceramic particles. Both the metal salt and the fast-ion conductor ceramic particles are dispersed within the polymer matrix. The fast-ion conductor ceramic particles are sequentially coated from the inside out with an inorganic oxide layer and a fluorinated silane coupling agent. The fluorinated silane coupling agent is chemically bonded to the inorganic oxide layer. This application also provides a method for preparing the composite solid electrolyte. Through both material and process innovation, this application prepares a composite solid electrolyte with high dispersibility, high ionic conductivity, and high interfacial compatibility.

The present application relates to a kind of preparation method of composite solid electrolyte with soft filler.The soft filler is obtained by converting nanocellulose particles into lithiated cellulose, and is a transparent cement-like composite material, with lithium ion transmission and anion molecular sieve function.The composite solid electrolyte is obtained by mixing solvent, polymer, lithium salt and lithiated cellulose.The lithiated cellulose has numerous oxygen-containing groups, opening up new transport path of lithium ion in composite solid electrolyte.At the same time, the lithiated cellulose can also limit the disordered motion of lithium salt anion, improve the lithium ion transport efficiency.It is found that the lithiated cellulose strengthens the physical and chemical properties of composite solid electrolyte.The process of composite solid electrolyte prepared by the method is simple, raw materials are easy to obtain, safe and pollution-free, suitable for large-scale production.

This invention belongs to the field of bio-based functional polymer materials, specifically relating to a high-strength, high-transmittance bio-based polyurethane film and its preparation method. The invention utilizes the reaction of malic acid with an aromatic ring diol to obtain a malic acid polyol, which is then polymerized with isocyanate. Chain extension is performed using a small molecule chain extender, and coumarin derivative monomers are used for end-capping to obtain the bio-based polyurethane. The bio-based polyurethane film is then obtained using a casting method and ice bath cooling treatment, exhibiting high transmittance, good mechanical properties, and biodegradability. This invention pertains to bio-based renewable materials and has potential applications in fields such as agricultural mulch films and packaging materials.

This application belongs to the field of organic materials technology, and provides an organic compound with the structure shown in Formula 1. This application also provides an organic electroluminescent device and electronic device comprising this organic compound. As an organic electroluminescent layer material, this organic compound can effectively improve the luminous efficiency of the organic electroluminescent device and extend its service life.

The application discloses an ecological and environment-friendly biodegradable fiber and a preparation method thereof. The method is that first, β-cyclodextrin and polyvinyl alcohol (PVA) are subjected to a copolymerization reaction to obtain plasticized modified PVA, then the plasticized modified PVA is used as a skin layer material of the fiber, PBS is used as a core layer material, and the ecological and environment-friendly biodegradable fiber is prepared through a coaxial skin-core spinning method. The ecological and environment-friendly biodegradable fiber prepared by the method has excellent mechanical properties, has the advantage of controllable degradation compared with existing PBS fibers, and has wide market application potential in the field of soft home furnishing which has high requirements on degradation performance.