272 results about "Polyethylene oxide" patented technology

The invention discloses a biodegradable flexible conductive high-hydrophobicity sensor substrate and a preparation method and application thereof.The preparation method comprises the steps that a polylactic acid electrostatic spinning solution and a chitosan / polyethylene oxide mixed electrostatic spinning solution are prepared on the basis of a safe and non-toxic food-grade material; the preparation method comprises the following steps: sequentially spinning by adopting an electrostatic spinning technology to form a sandwich structure flexible substrate, transferring a carbon nano tube conductive film, and tightly attaching the carbon nano tube conductive film to the surface of a polylactic acid layer of the sandwich structure substrate, thereby finally obtaining the flexible conductive high-hydrophobicity composite substrate. According to the invention, a hydrophobic-hydrophilic-hydrophobic sandwich structure is constructed through multi-layer electrostatic spinning, and a surface carbon nanotube conductive layer is cooperated, so that the substrate has high hydrophobicity, excellent conductivity and flexible tensile property. The preparation method has the characteristics of controllable process, low cost and environmental friendliness, and the obtained substrate is expected to have wide application prospects in the fields of food packaging, sensor substrates, intelligent wearing, health monitoring and the like.

The invention relates to the technical field of batteries, in particular to a high-dispersity and low-crystallinity composite solid electrolyte and an all-solid-state lithium metal battery. The composite solid electrolyte comprises a polymer matrix, a lithium salt, an inorganic filler and a quaternary ammonium salt surfactant, the mass ratio of the polymer matrix to the lithium salt to the inorganic filler to the quaternary ammonium salt surfactant is 100: (60-80): (10-20): (1-15). Through the quaternary ammonium salt additive, the inorganic filler is uniformly dispersed in a polymer matrix, and the crystallinity of polyethylene oxide (PEO) is effectively reduced, so that the ion transmission performance of the electrolyte and the cycling stability of a battery are remarkably improved, and the problem that organic-inorganic interfaces between PEO and LLZTO in the composite solid electrolyte are incompatible is systematically solved; and a key technical path is provided for developing a new generation of energy storage devices with high safety, long cycle life and excellent electrochemical performance.

The invention discloses an anti-adhesion biological polysaccharide flushing glue solution for surgical operation and a preparation method of the anti-adhesion biological polysaccharide flushing glue solution. The anti-adhesion biological polysaccharide flushing glue solution is prepared from the following raw materials in parts by mass: 5-30 parts of sodium carboxymethyl cellulose, 0.1-5 parts of polyoxyethylene with the molecular weight of 1,500,000-2,000,000 Daltons, 2-16 parts of sodium hyaluronate with the molecular weight of 1,200,000-2,000,000 Daltons and 80-100 parts of water for injection. The preparation method comprises the steps of alkalization of the natural plant fibers, carboxymethylation modification of the natural plant fibers, dissolution and mixing of prepared anti-adhesion liquid, emulsification treatment and sterilization filling. Natural plant fibers are used as raw materials, high-purity sodium carboxymethyl cellulose is prepared through a modification technology, and the sodium carboxymethyl cellulose is used as a basic framework of a glue solution and can be maintained to be incompletely degraded in an adhesion generation period in vivo, so that the stability of a physical barrier is ensured; sodium hyaluronate with the molecular weight matched with the anti-adhesion effect and polyoxyethylene for improving the strength and adhesiveness of the flushing fluid are screened and form a synergistic system with synchronous degradation and complementary strength with sodium carboxymethyl cellulose.

A gas separation membrane for permeating and separating carbon dioxide from a mixed gas containing the carbon dioxide includes: a sheet-shaped support layer; and a separation layer provided on one surface of the support layer, the separation layer having a function of selecting and separating carbon dioxide and being formed of a polymer containing a polyethylene oxide structural unit and a polysiloxane structural unit. The separation layer has an average thickness of 1 nm or more and 500 nm or less. When an XPS spectrum of the separation layer is obtained by X-ray photoelectron spectroscopy and a Si2p peak and a C1s peak included in the XPS spectrum are each subjected to waveform separation, an intensity ratio P(Si—O) / P(C—O) of a Si—O peak intensity P(Si—O) to a C—O peak intensity P(C—O) is 0.03 or more and 2.0 or less.

The invention relates to the field of lithium battery polyether-based electrolyte. The invention provides a polyether-based lithium battery electrolyte and a preparation method thereof. According to the preparation method, polyethylene oxide and bis (fluorosulfonyl) lithium imide are taken as main bodies, a dynamic polyether prepolymer and polyether shell layer aluminum oxide nano powder are combined, and the imine bond conversion rate, the median particle size D50, the content of an organic shell layer and the unit molar ratio of lithium salt to ethylene oxide are controlled; the method comprises the following steps: preparing slurry by using an anhydrous acetonitrile system, casting, drying in stages and post-curing to obtain a film-shaped or coating-shaped electrolyte, so that the water content is not higher than 500mg / kg, the total residual organic solvent content is not higher than 1000mg / kg, the viscosity and the thickness are controllable, and the residual epoxy value is promoted to be reduced; the problem that the viscosity and the purity are difficult to consider in film casting is solved; the method is suitable for large-scale preparation of the lithium battery electrolyte membrane.

The invention provides a composite solid electrolyte based on a porous meta-aramid nanofiber membrane and a fluorinated metal organic framework. A preparation method of the composite solid electrolyte comprises the following steps: preparing a porous poly (m-phenylene isophthalamide) nanofiber membrane; the fluorinated metal organic framework is prepared through two-step heat treatment synthesis and fluorination modification; and finally, coating the nanofiber membrane with a polymer electrolyte matrix comprising a fluorinated metal organic framework, polyethylene oxide and lithium salt to prepare the composite solid electrolyte. Through the synergistic effect of the porous polyisophthaloyl metaphenylene diamine nanofiber membrane and the fluorinated metal organic framework, while the mechanical strength and dendritic crystal inhibition capability of the composite solid electrolyte are remarkably improved, lithium ion transmission is effectively promoted, and the interface impedance is reduced; the prepared composite solid electrolyte is suitable for preparing a solid lithium metal battery with high safety and high performance.

The application discloses an organic-inorganic hybrid solid electrolyte film based on SiO2 aerogel and a preparation method, and belongs to the technical field of solid-state batteries; the organic-inorganic hybrid solid electrolyte film based on SiO2 aerogel is prepared from the following main raw material components: high-dispersion silica aerogel, lithium salt, polyethylene oxide and flame-retardant polyethylene imine; the high-dispersion silica aerogel is prepared by using N-imidazole propyl trimethoxysilane and tetraethyl orthosilicate as a silicon source by a co-precursor method; the flame-retardant polyethylene imine is obtained by reacting diethyl phosphite with polyethylene imine and then reacting with 1,3-dibromopropane; the lithium salt comprises lithium bis(trifluoromethanesulfonyl)imide; the organic-inorganic hybrid solid electrolyte film based on SiO2 aerogel prepared by the application has high ionic conductivity, excellent thermal stability, flame retardancy and electrochemical stability.

This present disclosure relates to the technical field of lithium-ion batteries, and particularly to a composite solid electrolyte, along with its methods of preparation and application. The preparation method comprises the following steps: mixing PEO, lithium bis(trifluoromethanesulfonyl)imide, and acetonitrile, subsequently adding the Prussian blue analogues, followed by stirring and ultrasonicating to obtain a mixed solution; the mixed solution is then formed into the composite solid electrolyte using the electrospinning technique. This present disclosure utilizes the Prussian blue analogues with a three-dimensional nanochannel structure and high specific surface area as a raw material. After preparation of the composite solid electrolyte, the pores of the composite solid electrolyte are larger and uniformly distributed, and the special pore structure establishes more stable and efficient ion transport channels, enabling smoother ion conduction and leading to enhanced electrochemical performance.

This invention provides a method for preparing a wide-temperature-range, high-safety, through-network structure functional fiber-based solid electrolyte, comprising: Step 1, co-dissolving polyacrylonitrile and an aldehyde-containing monomer in solvent A to prepare an aldehyde-containing functional spinning solution; Step 2, preparing an aldehyde-based fiber precursor from the spinning solution; Step 3, using the aldehyde-based fiber precursor as a template, inducing fiber surface polymerization in a system containing an ammonia-containing monomer, a proton source, and solvent B to prepare a core-shell structure COF fiber membrane; Step 4, loading an ionic liquid onto the surface of the core-shell structure COF fiber membrane to prepare an ionic liquid-functionalized COF fiber membrane; Step 5, coating the upper and lower surfaces of the ionic liquid-functionalized COF fiber membrane obtained in Step 4 with polyethylene oxide to prepare a through-network structure functional fiber-based solid electrolyte. The solid electrolyte of this invention possesses excellent mechanical strength, wide-temperature-range high stability, and fast ion transport capability, making it suitable for high-safety battery systems under extreme high and low temperature environments.

The invention belongs to the technical field of high polymer materials, and particularly relates to organic silicon modified polyurethane polystyrene foam as well as a preparation method and application thereof. The polystyrene foam comprises a component A and a component B, the component A is prepared from 40 to 60 parts of polyethylene oxide polyol, 25 to 35 parts of cashew nut shell oil polyol, 15 to 25 parts of castor oil modified polyol, 5 to 10 parts of modified resin A, 18 to 22 parts of flame retardant filler, 0.5 to 1.5 parts of foam stabilizer, 0.1 to 0.2 part of catalyst and 0.4 to 0.9 part of pure water; the modified resin A is organic silicon modified resin which contains active amido and has alkoxy at the tail end; and the component B comprises the following components in parts by weight: 75-85 parts of polymerized MDI and 15-25 parts of prepolymer A. According to the invention, an organic silicon chain segment is connected into a polyurethane network in a chemical bond manner, so that high tensile strength and high bonding strength are maintained while the elongation at break is improved, and the technical problem that the performance of the polyurethane polystyrene foam is difficult to consider at the same time is solved.

The application relates to a preparation method and application of an electrode material binder with high ion conductivity and high-voltage resistance, wherein polyethylene oxide is dissolved in deionized water, stirred for 24 hours at room temperature, and a polyethylene oxide solution is prepared; lithium salt is added; a sodium carboxymethyl cellulose aqueous solution is mixed with the polyethylene oxide-lithium salt mixed solution, stirred for 12 hours at room temperature, and an electrode material binder is obtained; the electrode material binder is mixed with a high-voltage resistant additive, and a high-ion-conductivity and high-voltage-resistant electrode material binder is obtained. The positive electrode material prepared based on the electrode material binder with high ion conductivity and high-voltage resistance has high capacity and excellent cycle stability. The modified lithium-rich manganese-based positive electrode material prepared has high ion conductivity and high-voltage resistance, the discharge specific capacity of the modified lithium-rich manganese-based positive electrode material is up to 295.51 mAh / g or more, the capacity retention rate is 102.14% after 400 cycles, and the modified lithium-rich manganese-based positive electrode material has high capacity and high cycle stability.

The invention belongs to the technical field of a lithium battery solid electrolyte, and particularly provides a cross-linked PEO-based composite solid electrolyte and a preparation method thereof, which are used for improving the mechanical strength and electrochemical performance of the PEO-based solid electrolyte. The cross-linked PEO-based composite solid electrolyte comprises poly (ethylene oxide) (PEO), lithium bis (trifluoromethylsulfonyl) imide (LiTFSI) and bis (acetylacetonate) diisopropyl titanate, the bis (acetylacetonate) diisopropyl titanate is used as a cross-linking agent, and the mass of the poly (ethylene oxide) (PEO) is used as a reference, so that the mass of the poly (ethylene oxide) (PEO) and the mass of the lithium bis (trifluoromethylsulfonyl) imide (LiTFSI) are uniformly distributed, and the mass of the lithium bis (trifluoromethylsulfonyl) imide (LiTFSI) is uniformly distributed on the basis of the mass of the poly (ethylene oxide) (PEO). The content of the bis (acetylacetonate) diisopropyl titanate is 3 to 5 weight percent of that of the polyethylene oxide. According to the invention, bis (acetylacetonate) diisopropyl titanate (TAA) is creatively provided as a cross-linking agent of the PEO-based composite solid electrolyte, and the introduction of the cross-linking agent can significantly increase the mechanical strength of PEO and increase the stability of the PEO-based solid electrolyte to lithium metal, so that the cycle life is prolonged, and the electrochemical performance is improved.

The invention provides a solid electrolyte, a preparation method and a lithium battery, the solid electrolyte comprises a nitrate ion liquid-based metal organic framework C, polyoxyethylene and LiTFSI, the nitrate ion liquid-based metal organic framework C accounts for 3wt% of the polyoxyethylene, and the molar ratio of the polyoxyethylene to the LiTFSI is 10: 1; wherein the nitrate ion liquid-based metal organic framework C has a nitrogen-containing heterocyclic ring, and nitrate ions and Zn ions are coordinated on the nitrogen-containing heterocyclic ring. In the solid electrolyte provided by the invention, nitrogen-containing heterocyclic cations in the nitrate ionic liquid-based metal organic framework have a binding effect on TFSI-anions in the lithium salt, and meanwhile, dissociation of the lithium salt is promoted, so that lithium fluoride is generated in situ. Moreover, nitrate ions obtain electrons on the surface of the lithium metal negative electrode, and the electrons and lithium ions form lithium nitride in situ on the SEI layer, so that deposition of dead lithium is reduced, and finally, the interface stability of the battery is remarkably improved.

A porous diaphragm, a preparation method therefor, and a use thereof. The porous diaphragm comprises a polyolefin porous substrate, an ionic liquid, and polyethylene oxide. The polyolefin porous substrate comprises a plurality of polyolefin fibrils and pores formed by mutual overlapping of the plurality of polyolefin fibrils. The ionic liquid and the polyethylene oxide are at least attached to surfaces of the plurality of polyolefin fibrils inside the polyolefin porous substrate. Compared with the polyolefin porous substrate, the porous diaphragm has an average volumetric pore size reduced by 40% to 86% and a thickness increased by 1.5% or less. The porous diaphragm has relatively high ionic conductivity, can effectively reduce internal resistance of a battery cell, also has relatively high puncture strength, thereby further improving battery safety performance. Furthermore, it can also avoid problems such as adhesion and delamination that are likely to occur during winding of the porous diaphragm.

Manufacturing structure for a positive electrode plate provided with a positive electrode suspension by electrostatic adhesion, wherein the positive electrode plate comprises a positive electrode substrate and a layer of positive electrode suspension adhering thereto; the positive electrode suspension consists of a material that remains solid at room temperature; the positive electrode suspension is produced independently without needing to be mixed with the positive electrode substrate during the manufacturing process; the positive electrode substrate and the positive electrode suspension can be produced separately; the positive electrode suspension is solvent-free, solid, and has a long shelf life; and the manufacturing structure of the positive electrode plate provided with the positive electrode suspension by electrostatic adhesion comprises: a raw material tank for receiving the positive electrode suspension material; and The positive electrode mass material comprises the following: a multitude of positive electrode particles that can store or release lithium ions; the positive electrode particles constitute an active material; and A variety of PEOs (polyethylene oxides) serve to guide lithium ions and increase the conductivity of the positive electrode for lithium ions; the PEOs are thermoplastic, therefore they melt at high temperatures and are in a molten state; and a variety of PVDFs (polyvinylidene fluoride) or PVDF-HFPs (vinylidene fluoride-co-hexafluoropropylene); the PVDFs or PVDF-HFPs and the PEOs are polymer materials; when the positive electrode suspension is heated to a specific temperature, a copolymer of the PEOs and the PVDFs or PVDF-HFPs melts in the positive electrode suspension, causing the positive electrode suspension to become sticky; the sticky positive electrode suspension adheres to the positive electrode substrate, thus forming the positive electrode plate; and a variety of conductivity agents to increase the electrical conductivity of the positive electrode suspension; and a variety of lithium salts for the lubrication of the polymer chains of the polymer material and for increasing the ionic conductivity; and a variety of ceramic particles for guiding the lithium ions and forming lithium ion channels to prevent side reactions between the lithium ions and the positive electrode suspension due to abnormal deposition of lithium ions in the positive electrode suspension; and a variety of positive electrode particles, ceramic particles, conductivity agents and lithium salts, which are dispersed in the polymer material and support the positive electrode suspension; and The positive electrode material remains a solid at room temperature; when the positive electrode material is heated to a specific temperature between 50°C and 240°C, the PEOs in the positive electrode material melt, so that the positive electrode material adheres to the positive electrode substrate and forms the positive electrode plate; and An electrostatic spray gun is connected to the raw material container and serves to hold the positive electrode suspension. It applies a voltage to the suspension, generating electrostatic charges on its surface and forming charged fine particles. These charged fine particles are sprayed from the spray gun's outlet. At the outlet of the spray gun, a roller conveyor mechanism advances a carrier plate. This carrier plate collects the charged fine particles sprayed from the outlet and distributes them onto the substrate of the positive electrode to form a first electrode plate. The carrier plate consists of a metal sheet; and Since each particle of the positive electrode material is extremely small, the particles electrostatically adsorb to one another when the positive electrode material is sprayed onto the substrate using an electrostatic spray gun, thus forming a high layer density. This creates the positive electrode plate with high energy density, and the lithium-ion conductivity is further increased. Upon contact of the charged fine particles with the metal sheet, an electrostatic attraction arises between the charged fine particles and the metal sheet, causing the charged fine particles to adhere to the metal sheet and form the first electrode plate. a heating element connected to the roller belt mechanism, serving to heat the first electrode plate so that the charged fine particles are converted into a molten material and adhere to the positive electrode substrate to form the positive electrode plate; and Since the positive electrode plate with the positive electrode mass layer formed from the positive electrode mass material does not require baking and rolling steps, the materials inside the positive electrode mass material are not damaged by thermal or mechanical stresses.

The invention relates to the field of material processing, in particular to a cold patch asphalt mixture and a preparation method thereof. The silanization modified soybean oil and the cyclodextrin modified polyethylene oxide are used as solvents, and through a Si-O-Si network generated when the silanization soybean oil is hydrolyzed in air, the mechanical property of the asphalt can be enhanced, and the asphalt can be slowly cured by itself in the use process; the quasi-rotaxane structure of the modified polyethylene oxide further improves the mechanical properties and flexibility of the material, and also brings a certain self-repairing ability to the material through the reversible fracture-recombination ability among the wheel-shaped macromolecules of the cyclodextrin. In addition, the low-temperature strength and toughness of the mixture are remarkably enhanced through a multi-network synergistic effect formed by the polymer and the nanoparticles, so that the problems of poor flexibility and insufficient durability and stability of the existing cold patch asphalt mixture at-30 DEG C are solved.

This invention relates to the field of new energy materials technology, specifically to a polymer solid electrolyte, its preparation method, and its application in solid-state lithium-sulfur batteries. The solid electrolyte is composed of polyethylene oxide, a selenium-containing substance, and a lithium salt. First, polyethylene oxide and the selenium-containing substance are mixed and heat-treated to obtain a composite product. Then, the composite product and the lithium salt are dissolved in a solvent, stirred, and mixed to obtain a mixed solution. The mixed solution is transferred to a separator and vacuum-dried to obtain the polymer solid electrolyte. This invention uses a heat treatment process to composite polyethylene oxide and the selenium-containing substance, forming a rapid lithium-ion transport channel within the electrolyte. This solid electrolyte exhibits high ionic conductivity, effectively promotes the reaction kinetics of the sulfur cathode material, and stabilizes the lithium anode. Solid-state lithium-sulfur batteries using the solid electrolyte prepared according to this invention exhibit high capacity utilization and stable cycle characteristics.

This invention provides a high-hygroscopic, water-free composite gel-type calcium and magnesium salt tablet and its preparation method, which is made from the following raw materials in parts by weight: 45-70 parts calcium and magnesium salt, 15-25 parts gum arabic, 3-15 parts mica powder, 2-12 parts polyethylene oxide, 0.5-2 parts sodium nitrite, and 2-30 parts gelatin. This tablet exhibits high hygroscopicity and excellent physical properties.

The invention discloses an anti-cracking pouring fine aggregate concrete slab and a preparation method thereof, and belongs to the technical field of concrete production. The concrete slab comprises the following components: cement, stones, machine-made sand, a mineral admixture, a polycarboxylate superplasticizer, a maleic anhydride-hydroxypropyl acrylate copolymer and polyoxyethylene. Wherein the maleic anhydride-hydroxypropyl acrylate copolymer is prepared through free radical polymerization, a blocking layer is formed by combining cement particles and other components, the effects of dispersion, water retention and shrinkage reduction are achieved, stress is relieved through polyoxyethylene, pores are refined, the cracking problem of a fine aggregate concrete plate is effectively solved, and the crack resistance and strength of the prepared concrete are improved.

The invention relates to the technical field of lithium ion batteries, and discloses an electrostatic spinning fiber coated lithium iron phosphate positive electrode material and a preparation method thereof, a positive electrode plate and a lithium ion battery, the positive electrode material comprises lithium iron phosphate and electrostatic spinning fiber according to a mass ratio of 90-98: 1; the electrostatic spinning fiber is obtained by electrostatic spinning of a spinning solution containing polyethylene oxide and a conductive agent; on the basis of the total mass of the spinning solution, the content of polyethylene oxide is 2-10 wt%, and the content of the conductive agent is 0.2-10 wt%; the conductivity of the conductive agent is 800-2000 S / cm, and the specific surface area is 0.1-50 m < 2 > / g. When the polyethylene oxide nanofiber modified lithium iron phosphate positive electrode material provided by the invention is used in a lithium ion battery, the polarization voltage of the battery can be reduced, and the voltage efficiency can be improved.

The invention discloses a double-salt system lithium battery polymer solid electrolyte, and relates to the technical field of energy, the double-salt system lithium battery polymer solid electrolyte comprises an electrolyte salt and a polymer matrix, the main salt of the electrolyte salt is LiX, the auxiliary salt is MX, and the polymer matrix is a polyethylene oxide (PEO) electrolyte; the invention also discloses a preparation method of the double-salt system lithium battery polymer solid electrolyte. The invention also discloses application of the double-salt lithium battery solid electrolyte in a lithium battery. According to the PEO-based composite solid electrolyte and the preparation method thereof disclosed by the invention, relatively cheap monovalent or high-valence metal salt is used and has extremely high compatibility with a PEO system, an additive is customized for the PEO-based composite solid electrolyte, the ionic conductivity of the PEO-based composite solid electrolyte and the interface chemistry of lithium metal can be improved at the same time, so that lithium ions are in a high-dissociation and weak-coordination state, the conductivity of the lithium ions is improved, and the service life of the PEO-based composite solid electrolyte is prolonged. The introduced metal ions can form an electrostatic shielding effect on the surface of the lithium metal negative electrode by regulating and controlling the concentration of the metal ions, so that the growth of lithium dendrites is inhibited.

The invention discloses a high-flexibility aryl polymer and a preparation method and application thereof.The high-flexibility aryl polymer replaces traditional polyoxyethylene, and a solid electrolyte prepared from the high-flexibility aryl polymer is high in room-temperature ionic conductivity, good in flexibility and resistant to high voltage. A novel polymer matrix material is developed, the problems that an existing polymer electrolyte is low in room-temperature ionic conductivity, not resistant to high voltage, poor in flexibility and the like are fundamentally solved, and the key technical bottleneck in the current solid-state battery field is broken through.

The invention relates to a medium-chain triglyceride nano-composite emulsion and a preparation method thereof, and belongs to the technical field of nano-emulsions. The composite emulsion comprises medium chain triglyceride, glycerol, an emulsifying aid and deionized water, an ether esterification CNF is added as a stabilizer, and the composite emulsion is synthesized by a two-step method: firstly esterifying methacryloyl chloride and nano cellulose, then enabling the esterified methacryloyl chloride and nano cellulose to react with sulfhydrylated polyoxyethylene through thiol-ene click reaction initiated by ultraviolet light, and introducing a hydrophilic ether chain. According to the structure, the stabilizer can be firmly anchored on an oil drop interface, and aggregation is prevented through the steric hindrance effect. When the emulsion is prepared, the stabilizer is dispersed in the water phase, then the oil phase is added for preliminary emulsification, and finally high-pressure homogenization treatment is performed. The emulsion prepared by the method is fine and uniform in particle size, obviously improved in stability, not easy to layer at high temperature and under long-term storage, excellent in spreadability and refreshing in skin feeling, and suitable for high-end cosmetic carriers.

The application provides a polytetrafluoroethylene / polyamide subcomposite fiber membrane and a preparation method and application thereof. The preparation method of the polytetrafluoroethylene / polyamide subcomposite fiber membrane comprises the following steps: providing a spinning solution and performing electrostatic spinning, performing heat treatment after obtaining a fiber membrane, and finally obtaining a polytetrafluoroethylene / polyamide subcomposite fiber membrane; the spinning solution comprises a spinning aid, polytetrafluoroethylene and a polyamide acid salt; the spinning aid is selected from one or more of polyethylene oxide, polyvinylpyrrolidone and polyvinyl alcohol. The composite fiber membrane prepared by the technical scheme has good hydrophobicity and good wet resistance, and has uniform and stable pore structure, good pore connectivity and good air permeability of the membrane, and is very suitable for being used in the fields of membrane distillation and the like.

A battery cell (20) comprises - an anode (31) which contains lithium metal, - a cathode (32), - an asymmetric composite electrolyte (40) with a first layer (41) and with a second layer (42), wherein the first layer (41) is in contact with the anode (31), wherein the second layer (42) is in contact with the cathode (32), wherein the first layer (41) comprises a lithium phosphorus sulfur chloride and a poly(ethylene oxide) as components, and wherein the second layer (42) comprises a lithium aluminum titanium phosphate and a poly(ethylene oxide) as components.

The present invention provides two-component aqueous textured layer forming compositions useful for forming flexible top coat layers for sports surfaces. The compositions comprise vulcanized or crosslinked rubber granules, for example, EPDM rubber, a soft:hard acrylic emulsion copolymer blend in a solids weight ratio to vulcanized or crosslinked rubber granule solids that ranges from less than 1:4 to 1:9, a polyalkylene oxide rheology modifier, one or more high boiling alcohols and, as a separate component, an aqueous dispersion of an aliphatic polyisocyanate as well as an epoxy silane. The vulcanized or crosslinked rubber granules may have a sieve particle size of 8 mm or less. The inventive top coat layers have enhanced tensile strength and elongation as well as improved pot life and color stability.

The preparation method of lithium powder anode based on dry electrode process includes raw material premixing, "sandwich" structure assembly, and roll forming of lithium powder electrode sheet. Specifically, it includes three process steps and conditions. The lithium powder obtained by the method is applied to lithium battery by embedding lithium powder into the mesh pores of copper mesh and bonding it tightly to the surface of copper mesh and copper foil under the bonding effect of polyethylene oxide (PEO) to form a "sandwich" structure. The introduced mesh support and carbon nanotubes (CNTs) together play a supporting role. It has the advantages of overcoming the reactive failure of solvent and lithium powder in traditional wet process and the defects of existing dry process, and solving the defect of reactive failure of solvent and lithium powder in traditional wet process.

The application discloses a preparation method of a modified polymer electrolyte, comprising the following steps: (1) mixing a modifier solution and a polymer matrix solvent uniformly to obtain a slurry, coating the slurry on a diaphragm, and obtaining a modified polymer film after drying; the modifier is selected from one or more of lithium ferrocyanide, lithium ferricyanide, lithium cuprocyanide and lithium cobalt cyanide; the polymer matrix is selected from one or more of polyvinylidene fluoride, polyvinylidene fluoride-hexafluoropropylene, polyethylene oxide, polyacrylonitrile, polyvinyl alcohol and polymethacrylate; (2) immersing the modified polymer film into an electrolyte, and obtaining the modified polymer electrolyte after drying. The prepared modified polymer electrolyte has the advantages of a wide electrochemical window, a high lithium ion transference number and high ionic conductivity; and a solid battery assembled by using the modified polymer electrolyte has the advantages of high capacity, high initial efficiency and high stability.

This invention relates to a gel electrolyte composition and its application. The gel electrolyte composition comprises acrylate monomers, polyethylene oxide, a bifunctional alkoxysilane crosslinking agent, an initiator, a lithium salt, and a solvent, wherein the bifunctional alkoxysilane crosslinking agent is an alkoxysilane with terminal unsaturated bonds. The gel electrolyte composition of this invention has extremely low viscosity, enabling "normal electrolyte injection" indistinguishable from liquid electrolytes, perfectly wetting thick electrodes, seamlessly integrating with existing battery production lines, and showing excellent industrialization prospects.