1051 results about "Polyethylene oxide" patented technology

The invention relates to the technical field of solid-state lithium batteries, in particular to a cellulose acetate modified PEO-based solid-state electrolyte membrane, a solid-state lithium battery and a preparation method thereof.The preparation method comprises the steps that lithium bis (trifluoromethanesulfonyl) imide, cellulose acetate and polyethylene oxide are dissolved in a solvent, and a mixed solution is obtained; and curing the mixed solution in a mold to obtain the cellulose acetate modified PEO-based solid electrolyte membrane. According to the invention, the cellulose acetate is introduced to modify the polyethylene oxide solid electrolyte, and the prepared cellulose acetate modified PEO-based solid electrolyte membrane can generate a stable solid electrolyte interface rich in Li2O and LiF on the surface of a lithium negative electrode in situ in the application of a solid lithium battery, so that the growth ability of lithium dendrites is effectively inhibited, and the performance of the lithium battery is improved. The interface impedance is reduced, and the operating temperature range of the solid-state lithium battery is widened.

The invention provides a silicon wafer and a preparation method thereof, and a solar cell and a preparation method thereof. The silicon wafer is provided with a first surface and a second surface which are opposite, the first surface is provided with a suede structure, and at least one part of the second surface is provided with an irregular hill-shaped structure. The preparation method of the silicon wafer comprises the following steps that acid etching is carried out on the first surface of the silicon wafer to be textured, then alkali texturing is carried out, so that a textured structure is formed on the first surface, and the textured structure can comprise a plurality of pyramid units; and immersing the silicon wafer subjected to alkali texturing into an alkali solution containing an organic polymer additive (such as polyoxyethylene), and finely adjusting the textured structure of the silicon wafer through etching of the alkali solution containing the organic polymer additive so as to form at least one concave part with a light trapping effect on at least one tower surface of the pyramid unit. The silicon wafer and the solar cell not only have excellent light trapping performance, but also do not affect the subsequent passivation effect, thereby effectively improving the current and efficiency of the solar cell.

The invention provides an aerogel reinforced composite electrolyte thin film for a solid-state lithium battery and a preparation method of the aerogel reinforced composite electrolyte thin film, and belongs to the technical field of composite electrolytes.The thin film comprises a three-dimensional porous aerogel skeleton, a solid-state electrolyte compound and lithium salt nanocrystals; wherein the three-dimensional porous aerogel skeleton is prepared from inorganic oxide nanoparticles and a polymer precursor through a sol-gel method; pores of the three-dimensional porous aerogel skeleton are filled with the solid electrolyte compound, the solid electrolyte compound comprises lithium lanthanum zirconium oxide nanowires and a polyoxyethylene-lithium salt composite matrix, and the lithium lanthanum zirconium oxide nanowires are directionally arranged in the thickness direction of the film; the lithium salt nanocrystals grow on the surface of the pore wall of the three-dimensional porous aerogel in situ; the mass ratio of the aerogel skeleton to the solid electrolyte compound is (1: 3)-(1: 15). According to the thin film, the ionic conductivity, the mechanical strength and the interface stability of the electrolyte are remarkably improved.

The invention relates to the technical field of solid electrolyte, in particular to normal-temperature surface modified flexible oxide solid electrolyte and a preparation method and application thereof. The normal-temperature surface-modified flexible oxide solid electrolyte is prepared from the following raw materials: a monomer, polyethylene oxide, a solvent, an initiator, a modified oxide ceramic electrolyte and electrolyte salt, wherein the mass of the monomer is 1-10% of the total mass of the components; the molar ratio of the initiator to the monomer is 0.01%-0.1%; the molar ratio of the electrolyte salt to the monomer is 1: (6-12); the mass ratio of the electrolyte salt to the modified oxide ceramic electrolyte is 1: (2.5-5). The flexible oxide solid electrolyte has high conductivity, wide temperature tolerance range and high structural stability, and when the flexible oxide solid electrolyte is applied to an all-solid-state lithium metal battery, the ionic conductivity, safety and cycle performance of the battery are improved.

The invention relates to a preparation method of a gel electrolyte with an efficient flame-retardant characteristic. The gel electrolyte is mainly composed of a gel matrix, a flame retardant and an electrolyte solution. The invention provides a method for preparing a flame-retardant gel electrolyte, and application of the flame-retardant gel electrolyte in energy storage equipment such as a lithium ion battery is described in detail. The flame-retardant gel electrolyte has excellent flame retardance, and the safety performance of a battery system can be effectively improved. The preparation method comprises the following specific synthesis steps: (1) firstly, mixing polyethylene oxide (PEO) with a solvent, then adding lithium hexafluorophosphate (LiPF6) electrolyte salt, and uniformly stirring to form a uniform solution; and (2) adding trifluoroethyl methacrylate and a PEGDMA initiator into the solution, carrying out polymerization reaction to form a composite skeleton, and infiltrating the electrolyte under the swelling action to finally form the gel electrolyte. And (3) drying the swelled gel electrolyte to remove redundant solvent and moisture, and then cutting and packaging to obtain the gel electrolyte with high flame retardance. The flame retardance of the electrolyte is remarkably improved by reducing the using amount of the electrolyte and polymerizing and curing the electrolyte.

The invention relates to the technical field of electronic devices, in particular to a synaptic memristive device with a vertical structure and a preparation method and application of the synaptic memristive device. The invention provides a synaptic memristor with a vertical structure. The synaptic memristor structurally comprises a substrate, a bottom electrode, an active layer, an electrolyte layer and a top electrode which are stacked in sequence. Wherein the active layer is a vanadium pentoxide film which is excellent in electrical property and optical response, and the sensitivity and plasticity of the device can be improved; the electrolyte layer adopts polyethylene oxide ionic glue, so that the resistance change characteristic of the active layer can be adjusted, the reaction between the active layer and the top electrode can be prevented, and the service life of the device is prolonged; the bottom electrode is an indium tin oxide thin film, has good compatibility with an active layer interface, can promote oxygen vacancy migration, and optimizes the resistance switching performance. Through mutual coordination of the materials, the device can generate microampere-level current under millivolt-level stimulation, shows high-sensitivity synaptic plasticity, and is suitable for a high-performance neuromorphic computing system.

The invention discloses a tea polyphenol modified polyferric flocculant as well as a preparation method and application thereof, and belongs to the field of anaerobic fermentation biogas slurry dehydration. Polyferric sulfate is used as a chain main body, tea polyphenol is used as a cross-linking agent, the tea polyphenol and iron ions in the polyferric sulfate form chelating coordination bonds under an alkaline condition, and the polyferric sulfate modified polyferric flocculant is prepared. Meanwhile, hydrophilic ether oxygen bonds in polyethylene oxide are combined with phenolic hydroxyl groups to form hydrogen bonds, so that a three-component polymer network is formed. Compared with the conventional flocculant, the modified polyferric flocculant prepared by the invention has the advantages that the electrical neutralization capability is enhanced, the adsorption bridging capability and the net repair sweeping capability of the flocculant are improved through coordinate bonds and hydrogen bonds, the floc forming rate is higher, the floc is larger and higher in strength, the sedimentation rate is higher, and the turbidity and the organic matter removal rate are high.

The invention belongs to the field of semiconductors, and particularly relates to a preparation method of a copper cylinder. In the process of electroplating the copper column on the chip wafer, the adopted electroplating liquid contains the polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer and polyacrylamide, so that the flatness of the surface of the copper column and the uniformity of the height of the copper column can be obviously improved.

The present invention provides an ultrathin polyethylene oxide-based carbon capture film, and a preparation method therefor and the use thereof. The ultrathin polyethylene oxide-based carbon capture film is of a three-layer composite structure, successively comprising a polyethylene oxide-based separation layer having a strong CO2 affinity, a modified interface modification layer and a support layer from top to bottom. The separation layer is prepared by carrying out cross-linking reaction of PEO and a silicone rubber monomer, and thus contains a large number of ether oxygen groups preferentially adsorbing CO2, and, by means of the introduction of a silicone rubber chain segment, overcomes the structural defects of high cohesive energy and low permeability of pure PEO films, thus achieving high gas molecule permeability. Aiming at the problem of poor compatibility between the interface modification layer and the separation layer, the surface properties of the interface modification layer are improved by utilizing a simple and controllable UV / O3 treatment method which is easy to scale up, thus achieving uniform and defect-free coating of the ultrathin separation layer. The present invention involves a simple preparation process, can easily realize scale-up preparation, and achieve excellent carbon capture performance.

The invention provides a preparation process of an environment-friendly film coating, and belongs to the technical field of coatings, the preparation process comprises the following steps: S1, mixing 3-4 parts of epoxy resin, 25-28 parts of polyurethane emulsion, 35-38 parts of water-based acrylic resin emulsion, 0.5-1 part of a curing agent, 0.5-1 part of an accelerant, 2-2.5 parts of a dispersing agent, 0.3-0.5 part of a wetting agent and 6-8 parts of PVA emulsion to obtain a first mixture; s2, adding 4-5 parts of fluorine-doped hexagonal boron nitride and 10-12 parts of nano aluminum oxide into the first mixture, and stirring to obtain a second mixture; adding 2-3 parts of polyoxyethylene, 0.4-0.5 part of citric acid, 2-4 parts of a coalescing agent and 0.5-1 part of a defoaming agent into the second mixture, and stirring to obtain a coating; s3, performing plasma activation on the PET film to obtain a pretreated PET film; and S4, uniformly coating the pretreated PET film with the coating, and curing to obtain the environment-friendly film coating. The ink-jet adhesive force is improved, and meanwhile, the mechanical property of a PET film coated with a coating is improved.

The invention relates to the technical field of battery solid electrolyte, in particular to a method for constructing polyethylene oxide-based composite solid electrolyte by sub-nanowires. According to the specific technical scheme, the method comprises the following steps: (1) sub-nanowire surface grafting modification: dispersing sub-nanowires in a weak polar solvent, then adding a sulfhydryl compound and a photoinitiator, and reacting for 4-10 hours under the conditions of ultraviolet irradiation and ice bath; and (2) construction of the composite solid electrolyte: dissolving polyethylene oxide, a lithium salt and the sub-nanowire modified in the step (1) in a polar solvent, uniformly stirring, casting to form a film, and drying at normal temperature. According to the invention, the problems of poor filler dispersity, low size matching degree, insufficient interfacial compatibility and the like in the traditional composite electrolyte are solved.

The invention discloses a resin aluminum cover plate for circuit board drilling and a preparation method thereof.The preparation method comprises the steps that modified polyurethane is dissolved in water and then evenly mixed with modified filler, modified paint is prepared, the surface of aluminum foil is coated with the modified paint, drying is conducted, and the resin aluminum cover plate is prepared. Compared with traditional polyethylene oxide and polyethylene glycol, the high temperature resistance and the stability are better, large-area surface coating melting caused by overheating in the drilling process is avoided, the drilling precision is guaranteed, meanwhile, a polyurethane molecule side chain contains a long-chain ester group, the lubricating property between a drill bit and resin can be improved, and when the drill bit makes contact with modified filler, the service life of the drill bit is prolonged. When the drill bit is in use, polyethylene glycol on the surface of the modified filler melts, palm oil in pore diameters of the bamboo fibers is released under extrusion of the drill bit, the bamboo fibers can extrude hexagonal boron nitride in the bamboo fibers to form sliding, and then friction between the drill bit and resin is greatly reduced.

The invention relates to the technical field of functional composite probe material preparation, in particular to a three-core spinning technology-based bio-compatible gel probe and a preparation method thereof, and the three-core spinning technology-based bio-compatible gel probe comprises a composite skin layer and three functional core layers; the composite skin layer is composed of a sodium alginate-polydopamine-chitosan grafted copolymer in a mass ratio of 2: 1: 0.5, and contains # imgabs 0 # chondroitin sulfate and # imgabs 1 # polyoxyethylene; the three core layers are respectively a carbon nanotube-polyaniline # imgabs2 # hybrid material, a graphene-polypyrrole-boron nitride hybrid material and a # imgabs3 # polythiophene-hydroxyapatite hybrid material, and the mass ratio of the carbon material to the conductive polymer to the newly added nano material in each core layer is 1: 2: 0.3; and the diameter ratio of the skin layer to the three core layers is 1: 0.28: 0.22: 0.17. According to the invention, multichannel signal transmission is realized, the impedance is reduced by the hybrid material, and the conductivity is improved; the composite skin layer is matched with soft tissue mechanical properties, and interface bonding is stable; and the biocompatible component reduces inflammation, is suitable for acquiring nerve electrophysiological signals, and is easy for large-scale production.

The invention provides an aromatic polyoxadiazole film and a preparation method and application thereof.The preparation method of the aromatic polyoxadiazole film comprises the following steps that fuming sulfuric acid serves as a solvent and a dehydrating agent, terephthalic acid and hydrazine sulfate serve as monomers, benzoic acid serves as a chain end-capping agent, step-by-step feeding is adopted, and three-stage condensation polymerization is conducted to obtain the aromatic polyoxadiazole film. An aromatic polyoxadiazole resin solution is obtained; pressurizing, orienting and conveying to a forming die head, extruding to obtain an acid-containing primary cast film, and solidifying and forming in a single-stage coagulating bath to obtain a polyoxadiazole wet film; washing the acid-free polyoxadiazole wet film to obtain an acid-free polyoxadiazole wet film; then biaxial stretching is conducted, heat setting treatment is conducted, and the aromatic polyoxadiazole film is obtained. After the aromatic polyoxadiazole film prepared by the method is carbonized and graphitized, the problem of'powder falling 'is avoided, and the prepared super-crystal graphite film is flat and uniform in appearance, more complete in crystal structure, higher in heat-conducting property, free of pollution to electronic elements and good in application prospect.

Dielectric thin film for a solid-state or semi-solid-state lithium battery, wherein the lithium battery comprises a negative electrode and a positive electrode; the dielectric thin film is connected between the negative electrode and the positive electrode; the negative electrode comprises a negative electrode slurry, which is used as a binder, and a plurality of negative electrode particles dispersed in the negative electrode slurry; the positive electrode comprises a positive electrode slurry, which is used as a binder, and a plurality of positive electrode particles dispersed in the positive electrode slurry; the dielectric thin film comprises: a first, a second and a third film layer; wherein the first film layer is connected to the positive electrode and the third film layer to the negative electrode; wherein the second film layer is connected between the first film layer and the third film layer; the first film layer comprises the following: a first polymer material which is used as the base material of the first film layer; wherein the first polymer material is a mixture of PVDF-HFP (polyvinylidene fluoride hexafluoropropylene copolymer), ADN (adiponitrile), GLN (glutaronitrile) and SN (succinonitrile); wherein each of the ADN, GLN and SN is used as a plasticizer in the first polymer material and is dispersed in the PVDF-HFP to disperse a structure of the first polymer material itself; a first lithium salt dispersed in the first polymer material; wherein the first lithium salt is a mixture of LiBOB (LiB(C2O4)2, lithium bis(oxalate)borate), LiTFSI (LiN(CF3SO2)2, lithium bis(trifluoromethanesulfonyl)imide) and LiFSI (F2LiNO4S2, lithium bis(fluorosulfonyl)imide); where ADN, GLN and SN in the first polymer material serve to reduce crystal precipitation of the first polymer material and to support dissociation of the first lithium salt in the first film layer, which increases lithium ion conductivity and malleability of the first film layer; the second film layer comprises the following: a second polymer material used as the base material of the second film layer; wherein the second polymer material is a mixture of PVDF-HFP, PAN (polyacrylonitrile) and SN; wherein PAN and SN are each used as plasticizers in the second polymer material and are dispersed in the PVDF-HFP; a second lithium salt dispersed in the second polymer material; wherein the second lithium salt is a mixture of LiFSI and LiTFSI; wherein PAN and SN in the second polymer material serve to reduce crystal precipitation of the second polymer material and to promote dissociation of the second lithium salt in order to increase lithium ion conductivity of the second film layer; a second inorganic ceramic structure consisting of a plurality of first LLZO particles dispersed in the second polymer material; an outer surface of each of the first LLZO particles is coated with a first dopamine layer (DA, 3,4-dihydroxyphenethylamine); each of the first LLZO particles consists of LLZO (lithium lanthanum zirconium oxide, Li7La3Zr2O) 12 ) or from LLZO doped with at least one metal; and the third film layer comprises the following: a third polymer material, which is used as the base material of the third film layer; the third polymer material is a mixture of PEO (poly(ethylene oxide), polyethylene oxide) and PAN; the PAN in the third polymer material is used as a plasticizer and is dispersed in the PEO; a third lithium salt formed from LiTFSI and dispersed in the third polymer material; a third inorganic ceramic structure formed from a plurality of second LLZO particles dispersed in the third polymer material; an outer surface of each of the second LLZO particles is coated with a second dopamine layer; each of the second LLZO particles is formed from LLZO or doped with at least one metal; and the third inorganic ceramic structure serves to increase the lithium ion conductivity of the negative electrode.

To improve the storage stability of mirabegron formulations and mitigate changes in drug release behavior dependent on storage environment humidity.SOLUTION: A pharmaceutical composition contains mirabegron and isomalt hydrate. The pharmaceutical composition may further contain a macromolecular substance forming hydrogel. The macromolecular substance forming hydrogel may be polyethylene oxide, cellulose ether, or a combination of them.SELECTED DRAWING: Figure 1

The invention discloses an antibacterial hyaluronic acid wound dressing with a core-shell structure and a preparation method of the antibacterial hyaluronic acid wound dressing, and belongs to the field of biomedical materials. The core-shell structure nanofiber is prepared by adopting a coaxial electrospinning technology, and the preparation mode is superior to the solid structure nanofiber prepared by common electrospinning. According to the invention, polyvinyl butyral, a polyethylene oxide solution, zein and a modified hyaluronic acid solution are simultaneously sprayed out by using concentrically arranged nozzles, and are drawn into fibers by using electrostatic force, so that drugs wrapped in the fiber structure can realize controlled release and lasting effects; and a new scheme is provided for preparation of wound dressing.

The invention relates to the technical field of solid-state lithium batteries, in particular to an intercalation type composite solid-state electrolyte as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out ion exchange, centrifugal washing, freeze drying and other processes on sodium-based montmorillonite to obtain lithiated montmorillonite nanosheets; the preparation method comprises the following steps: adding lithiated montmorillonite nanosheets and polyethylene oxide into N, N-dimethylformamide to obtain slurry A; adding a high-molecular polymer material and lithium salt into N, N-dimethylformamide to obtain slurry B; dropwise adding the slurry A into the slurry B to obtain a precursor solution; and blade-coating the precursor solution on a glass substrate, standing, carrying out vacuum drying, and demolding to obtain the intercalation type composite solid electrolyte. The process is simple, the raw materials are easy to obtain, and the obtained electrolyte has high ionic conductivity, a wide voltage window and excellent mechanical property and flame retardant property.

The invention belongs to the technical field of electronic devices, and particularly relates to a synaptic transistor and a preparation method and application thereof. The invention provides a synaptic transistor structure. The synaptic transistor structure comprises a substrate, an active layer, a source-drain electrode layer and a gate dielectric layer which are stacked in sequence. Wherein the active layer adopts an indium tin zinc oxide thin film, and the thin film has excellent photoelectric property, high mobility and good interface flatness, and provides a solid foundation for high performance of the device; the gate dielectric layer is made of polyethylene oxide-lithium ion glue, and lithium ions can significantly improve the overall performance of the device due to high mobility, small size effect and interface roughness optimization effect. The selection of the material not only enhances the conductivity of the gate dielectric layer, but also helps to improve the stability and reliability of the device. Through interaction of the materials, the synaptic transistor has excellent electrical properties and has a wide application prospect.

The invention belongs to the technical field of textile dyeing, and provides a salt-free alkali-free electrostatic spray dyeing method for cellulosic fibers, which comprises the following steps: uniformly mixing polyethylene oxide, reactive dye and solvent to obtain electrostatic dye liquor; the method comprises the following steps: dissolving a cationic modifier and an alkaline color fixing agent in water to prepare a cationic modified solution, padding a cellulose fiber fabric, and drying to obtain a cationic modified cellulose fiber fabric; and spraying the electrostatic dyeing liquid to the surface of the cationic modified cellulose fiber fabric through electrostatic spraying, and carrying out open-width steaming color fixation and cleaning to obtain the electrostatic spraying dyed cellulose fiber fabric. The electrostatic spraying technology is adopted to replace traditional water bath dyeing, excellent K / S value, dye uptake and color fastness can be achieved without consuming a large amount of salt, alkali and water, water resource consumption and environmental pollution are remarkably reduced, and high-salinity and high-chroma printing and dyeing wastewater is avoided.

The application relates to the technical field of solid-state batteries, in particular to a modified polyethylene oxide and a preparation method thereof, which comprises the following steps: mixing polyethylene oxide and E12 epoxy resin, and then carrying out temperature reciprocating pulse heating to control the degree of polycondensation reaction of the polyethylene oxide and the E12 epoxy resin, so as to obtain a modified polyethylene oxide solution; and evaporating and rinsing the polyethylene oxide solution to obtain the modified polyethylene oxide. According to the technical scheme, the possibility of chain degradation caused by the interfacial gap is avoided as much as possible, the ion transmission and the stability of the mechanical structure are improved, and the solid-solid interface adhesion degree is enhanced.

The invention relates to the technical field of fire extinguishing agents, and discloses a fluoride-free anti-solubility foam fire extinguishing agent and a preparation method thereof.The fluoride-free anti-solubility foam fire extinguishing agent comprises a hydrocarbon surfactant, a carboxyl modified organosilicon surfactant, a foam stabilizer, a cosolvent, water and a pH regulator; the carboxyl modified organic silicon surfactant is obtained by modifying an organic silicon surfactant by using maleic anhydride; the foam stabilizer contains xanthan gum and a component A, according to the invention, the organosilicon surfactant is modified, so that the obtained carboxyl modified surfactant has good surface activity and water solubility; xanthan gum and a component A (polyethylene oxide-polypropylene oxide-polyethylene oxide and other substances) are compounded to serve as a foam stabilizer, so that the foam stability and the anti-dissolving performance can be improved, and the foam stabilizer also has temperature-sensitive-thermal response performance; under the combined action of the components, the fire extinguishing agent provided by the invention has excellent fire extinguishing performance and can quickly extinguish non-polar fuel and polar fuel.

The invention provides a phosphate and polyethylene oxide modified silicon-based double-layer negative electrode material and a preparation method thereof. The negative electrode material is of a modified silicon and graphite double-layer structure, a modified silicon material layer is arranged on the surface of a copper current collector, and a graphite layer is arranged on the surface of the modified silicon material. The preparation method of the modified silicon material comprises the following steps: (1) carrying out ball milling on silicon powder, lithium hydroxide and ammonium dihydrogen phosphate to prepare lithium phosphate modified silicon powder; (2) stirring and sintering the modified silicon powder and glucose to obtain a carbon-coated modified silicon material; and (3) mixing the modified silicon powder with polyethylene oxide to prepare slurry, and coating the slurry on a current collector to obtain the modified silicon material layer. The preparation method of the graphite material comprises the following steps: mixing graphite powder and polyethylene oxide to prepare slurry, and coating the slurry on the surface of the modified silicon material layer to obtain the silicon-based double-layer negative electrode material. According to the silicon-based double-layer negative electrode material disclosed by the invention, inorganic and organic modified materials are introduced, so that the silicon-based double-layer negative electrode material has high electronic conductivity and ionic conductivity, meanwhile, the stability of the silicon-based negative electrode material is improved to a certain extent by adding a graphite double-layer structure, and a half battery assembled by the material has good cycle performance and rate capability.

The invention discloses a flexible lanthanum zirconate-alumina fiber membrane as well as a preparation method and application thereof, and belongs to the technical field of inorganic nonmetal ceramic fiber materials. The preparation method comprises the following steps: dissolving zirconium oxychloride octahydrate, lanthanum chloride heptahydrate and aluminum chloride hexahydrate into absolute methanol, sequentially adding acetylacetone and triethylamine, stirring, and drying under reduced pressure to obtain a zirconium-lanthanum-aluminum polymer precursor containing triethylamine hydrochloride; soaking the zirconium-lanthanum-aluminum polymer precursor containing triethylamine hydrochloride in acetone, standing, filtering, concentrating under reduced pressure, and drying to obtain a zirconium-lanthanum-aluminum acetylacetone polymer precursor; the preparation method comprises the following steps: preparing a spinning solution from a zirconium-lanthanum-aluminum acetylacetone polymer precursor, absolute methanol serving as a solvent and polyoxyethylene serving as a spinning aid, and carrying out electrostatic spinning on the spinning solution to obtain a lanthanum zirconate-aluminum oxide precursor fiber membrane; and performing heat treatment on the lanthanum zirconate-aluminum oxide precursor fiber membrane to obtain the flexible lanthanum zirconate-aluminum oxide fiber membrane. According to the preparation method, acetylacetone is added into zirconium oxychloride, lanthanum chloride and aluminum chloride for coordination to form a linear zirconium-lanthanum-aluminum acetylacetone polymer, so that the technical problem that lanthanum zirconate long fibers with high strength and good flexibility are difficult to obtain is solved.

The present disclosure includes hyperbranched polyether polyols, such as hyperbranched poly(3-(oxiran-2-ylmethoxy) propane-1,2-diol) (HPOD), methods for their preparation and uses thereof, for example, as a cryoprotectant, lyoprotectant or stabilizer.

The invention discloses a double-phase-change flexible film for solar power generation and a preparation method of the double-phase-change flexible film. According to the method, water-soluble polymers such as polyvinyl alcohol, polyvinylpyrrolidone, polyethylene oxide and the like are used as flexible base materials and are physically blended with vanadium dioxide, freeze drying is performed, then phase change heat storage materials such as fatty acid, alkane, polyethylene glycol, paraffin and the like are subjected to vacuum impregnation adsorption, and the double-phase-change flexible film for solar power generation is synthesized. The double-phase-change flexible film synthesized by the method can realize double phase change in the same phase change temperature zone, has a selective intelligent reflection function on near-infrared light before and after phase change, and has relatively high photo-thermal conversion efficiency, and the synthesis method is simple, safe and easy to prepare. Wide application prospects are realized in the aspects of solar power generation, electronic device heat management, intelligent infrared stealth and the like.

The invention discloses a 3D printing multilayer composite all-solid-state electrolyte membrane and a preparation method thereof, and belongs to the technical field of all-solid-state electrolyte. The preparation method comprises the following steps: (1) solution premixing: mixing photosensitive resin, an aprotic polar solution, an inorganic filler, a photoinitiator and a lithium salt to obtain a mixed solution; (2) preparing a slurry A and a slurry B: taking the mixed solution, respectively adding polyvinylidene fluoride and polyoxyethylene, carrying out ultrasonic treatment, and then carrying out oil bath heating to respectively obtain the slurry A and the slurry B; and (3) preparing an electrolyte membrane: sequentially pouring the slurry A and the slurry B into a printing groove of a 3D printer for printing, taking a membrane printed by the slurry A as a middle interlayer membrane, taking a membrane printed by the slurry B as a top layer membrane and a bottom layer membrane, and after printing is completed, washing and drying to obtain the 3D printed multi-layer composite all-solid-state electrolyte membrane. According to the preparation method, penetration of lithium dendrites is effectively inhibited, and the overall stability and durability of the membrane are enhanced.

A boron-doped graphene composite solid-state electrolyte and its preparation and application. A mixed solution of polyacrylonitrile (PAN) and N,N-dimethylformamide is prepared into a PAN porous film using electrospinning technology. A PEO casting solution is prepared by mixing boron-doped graphene, polyethylene oxide, lithium bis(trifluoromethanesulfonylimide), and acetonitrile. This solution is then cast onto the PAN porous film and, after vacuum drying, forms a composite solid-state electrolyte with polyacrylonitrile fibers as a support, polyethylene oxide as a matrix, and boron-doped graphene as a filler. The composite solid-state electrolyte prepared by the present invention has high ionic conductivity and lithium ion transference number, providing lithium batteries with good rate performance and cycle stability.

The embodiment of the invention relates to a negative plate, a preparation method thereof and a battery, the negative plate comprises a current collector, and a first active material layer and a solid electrolyte layer which are arranged on at least one surface of the current collector, and the first active material layer is located between the current collector and the solid electrolyte layer; the first active material layer comprises a silicon-based material; the solid electrolyte layer comprises a three-dimensional network cross-linked product of polyethylene oxide and trimethylaluminum and inorganic lithium salt positioned in pores of the three-dimensional network cross-linked product. Therefore, the volume expansion of the first active material layer can be effectively inhibited through the solid electrolyte layer in the charging and discharging process, the stability of the SEI membrane is improved, the SEI membrane rich in lithium salt can be constructed, the desolvation of active ions is promoted, and the capacity, the cycling stability and the low-temperature performance of the battery can be further improved.

The invention relates to a renewable industrial flue gas carbon dioxide adsorbent and a preparation method thereof. The method comprises the following steps: S1, mixing alkali metal, an aluminum oxide precursor, silicon oxide and a first solvent, or mixing an alkali metal solution, the aluminum oxide precursor, the silicon oxide and an optional second solvent, and then molding the mixed material to obtain microsphere particles; s2, mixing the microsphere particles and organic amine, and carrying out first loading treatment and drying treatment to obtain an organic amine loaded material; s3, roasting the organic amine-loaded material, mixing the obtained roasted material with a carrier material, and carrying out second loading treatment, so as to obtain the carbon dioxide adsorbent, the carrier material is selected from at least one of polystyrene-polyacrylic acid-polyethylene oxide, polymethyl methacrylate-b-polystyrene, zirconium oxide and a porous ceramic material. The carbon dioxide adsorbent is relatively high in adsorption capacity and relatively good in selectivity, reproducibility and stability; and large-scale industrial production and application are facilitated.