1772 results about "In situ polymerization" patented technology

The invention belongs to the technical field of battery electrolytes, and particularly relates to a gel polymer electrolyte as well as a preparation method and application thereof. The gel polymer electrolyte is prepared through in-situ polymerization, and the electrolyte is composed of a monomer, a cross-linking agent, an initiator, an organic solvent and a lithium salt. The monomer is selected from fluorine-containing monomers such as trifluoroethyl acrylate, 2, 2, 3, 3-tetrafluoropropyl methacrylate and the like, and the cross-linking agent is selected from NH-containing cross-linking agents such as N, N '-methylene bisacrylamide, hexamethylene bisacrylamide and the like, so that a polymer side chain fluorine-containing functional group is formed in situ and interacts with lithium ions, and lithium ion transmission is promoted; and the NH functional group on the main chain limits the migration of anions, so that the ion migration number is increased. Therefore, the copolymerized fluorine-containing monomer and nitrogen-containing cross-linking agent gel polymer electrolyte enables the battery to show good specific discharge capacity and cycling stability under high current density.

The invention belongs to the technical field of fiber materials, and particularly relates to a modified aramid nanofiber as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing an aramid nanofiber dispersion liquid; (2) modifying the aramid nanofiber by using POSS; and (3) carrying out in-situ polymerization on polypyrrole on the surface of the aramid nanofiber. POSS (polyhedral oligomeric silsesquioxane) has a relatively large volume exclusion effect, the template effect of long-chain alkyl quaternary ammonium salt can be influenced by scattered adhesion of POSS on the surface of aramid nanofiber, uneven polymerization of pyrrole monomers is caused, and formation of a rough structure on the surface of the fiber is facilitated. According to the invention, the polypyrrole-coated aramid nanofiber with a coarse structure is used as a polyolefin modified material, so that the problem of low interfacial force existing in a common filler is solved, and the polyolefin resin composite material with high strength and antistatic property is obtained and can be widely applied to the fields of pipes, plates, grouting equipment parts, grouting bags and the like.

The invention relates to a high-voltage-resistant deep eutectic-based in-situ polymerization solid electrolyte as well as preparation and application thereof. The in-situ polymerization solid electrolyte is obtained through an in-situ polymerization reaction of a precursor solution comprising 30-80 wt% of a deep eutectic solution, 10-50 wt% of a polymerizable monomer, 1-30 wt% of an additive and 0.05-10 wt% of an initiator; the deep eutectic solution comprises a lithium salt and a hydrogen bond donor organic solvent; the hydrogen bond donor organic solvent comprises a nitrile solvent and a non-nitrile solvent; the polymerizable monomer comprises a monomer for free radical-initiated polymerization or ring-opening polymerization; the additive comprises lithium nitrate and fluoroethylene carbonate. The high-voltage-resistant in-situ polymerization solid electrolyte formed by in-situ compounding of an organic framework formed by in-situ polymerization of a deep eutectic solution, an additive and a monomer has the excellent characteristics of wide electrochemical window, high ionic conductivity, high mechanical strength, good flame retardance, wide-temperature applicability and the like, and can be suitable for a high-voltage system of 4.6 V or above; the solid-solid contact problem of a solid-state battery interface is effectively solved, and the side reaction between the electrolyte and the lithium metal negative electrode is reduced.

The invention provides a preparation method of a gel semi-solid battery and the gel semi-solid battery, and belongs to the technical field of battery materials. The preparation method comprises the following steps: pre-mixing a gel monomer into a positive pole piece and a negative pole piece by adopting a dry electrode technology, then assembling the positive pole piece, the negative pole piece and a diaphragm into a dry battery cell, injecting a gel electrolyte prepolymer prepared from the gel monomer, an electrolyte, an initiator and the like into the dry battery cell, and standing and infiltrating; and heating and carrying out in-situ polymerization curing to obtain the gel semi-solid battery. According to the preparation method, a dry-method electrode technology and an in-situ curing technology are combined, on one hand, the curing uniformity of the gel electrolyte prepolymer is improved, on the other hand, it can be guaranteed that the cured gel electrolyte prepolymer makes closer contact with active material particles, the conductivity of gel and the active material is improved, and the conductivity of the active material is improved. Therefore, the overall electrical performance of the semi-solid battery is improved. The invention also provides a gel semi-solid battery which is prepared by the preparation method.

The invention provides a polyaniline / modified graphene oxide composite material and a preparation method thereof. The preparation method comprises the following steps: dispersing purified graphene oxide, performing ultrasonic treatment, heating, adding a modifier for modification, centrifuging, taking precipitate, freezing, drying and grinding to obtain modified graphene oxide powder; mixing the powder with an aniline solution in doped acid to form a modified graphene oxide / aniline acid solution; dissolving ammonium persulfate in the doped acid to prepare an ammonium persulfate acid solution; and slowly dropwise adding the solution into the solution, carrying out in-situ polymerization, and carrying out suction filtration, washing and drying to obtain the composite material. According to the method, through chemical modification and in-situ polymerization processes, the problems that a single filler is poor in dispersity, a conductive network is discontinuous, and anti-corrosion and anti-static performance is difficult to synergistically improve are solved, and the process is simple and convenient and suitable for industrialization.

The invention relates to a preparation method and application of a composite porous carbon-based negative electrode material with soft carbon coated with hard carbon. The preparation method comprises the following steps: (S1) carbonizing and activating a soft carbon material precursor to obtain soft carbon core particles; (S2) carrying out graft modification on the oxidized soft carbon inner core particles through dopamine polyethylene glycol silane, and then carrying out in-situ copolymerization reaction on the modified soft carbon inner core particles and dopamine to obtain organic silicon-polydopamine coated soft carbon composite particles; (S3) carrying out in-situ polymerization of phenolic aldehyde on the surfaces of the composite particles to form phenolic aldehyde coated soft carbon composite particles; (S4) carbonizing and activating the phenolic aldehyde coated soft carbon composite particles to obtain hard carbon coated soft carbon composite porous carbon; and (S5) carrying out silicon deposition and carbon coating on the composite porous carbon to obtain the composite porous carbon-based negative electrode material with soft carbon coated with hard carbon. When the composite porous carbon-based negative electrode material with the soft carbon coated with the hard carbon prepared by the invention is applied to a negative electrode of a lithium battery, the composite porous carbon-based negative electrode material has good electrochemical performance, and particularly has excellent cycle performance and compression resistance.

The invention relates to the technical field of lithium battery polymer solid electrolyte materials, and discloses a high-pressure-resistant in-situ polymerization quasi-solid electrolyte membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: carrying out esterification reaction on bacterial cellulose and 2-bromoisobutyryl bromide to obtain bromine-modified bacterial cellulose, grafting a double-block polymer side chain on the surface of the bromine-modified bacterial cellulose to obtain a one-dimensional polymer brush, and preparing a one-dimensional polymer brush film; a one-dimensional polymer brush film is used as a supporting film, an in-situ polymerization precursor solution is dropwise added to the surface of the supporting film, and the high-pressure-resistant in-situ polymerization quasi-solid electrolyte film is obtained through in-situ ring opening polymerization. The prepared high-pressure-resistant in-situ polymerization quasi-solid-state electrolyte membrane has excellent mechanical performance, the thickness of polymer electrolyte can be reduced, and growth of lithium dendrites can be inhibited; the rich pore structure is beneficial to rapid transmission of lithium ions; and the block in the side chain is beneficial to lithium ion transmission and lithium metal uniform deposition, and improves the stability of the electrolyte membrane in a high-voltage environment.

The invention relates to a composite solid electrolyte membrane with high ceramic content and a preparation method and application thereof. The preparation method comprises the following steps: mixing ceramic solid electrolyte particles activated by a silane coupling agent with an in-situ polymerization solution containing a cross-linking agent, an organic monomer, a plasticizer, a lithium salt, an ultraviolet light initiator and a thermal initiator to form solid electrolyte slurry, wherein the ceramic solid electrolyte particles account for 60-90% of the total mass of the composite solid electrolyte membrane; the preparation method comprises the following steps: coating a positive pole piece with solid electrolyte slurry, initiating shallow organic matter monomers and a cross-linking agent to generate in-situ polymerization through an ultraviolet light initiator, covering a negative pole piece for hot pressing treatment, initiating residual organic matter monomers and the cross-linking agent to generate in-situ polymerization through a thermal initiator, and forming a composite electrolyte membrane with high ceramic content. The invention also discloses an all-solid-state battery containing the composite solid electrolyte membrane. The solid-state battery containing the in-situ formed composite solid-state electrolyte membrane has relatively high cycling stability.

The invention belongs to the technical field of fuel cell electrode material preparation, and particularly relates to a carbon electrode material for a polypyrrole modified bio-based fuel cell and a preparation method of the carbon electrode material. Comprising the following steps: modifying rice hull low-temperature carbonized powder by sequentially adopting POSS (Polyhedral Oligomeric Silsesquioxane) containing unipolar functional groups and POSS containing polypolar functional groups to obtain modified low-temperature carbonized powder; and carrying out in-situ polymerization on a pyrrole monomer on the surface of the modified low-temperature carbonized powder, and carrying out high-temperature carbonization and hydrofluoric acid corrosion to obtain the polypyrrole modified bio-based fuel cell carbon electrode material. The polypolar functional group POSS not only is beneficial to the in-situ polymerization reaction of pyrrole, but also can form a continuous macromolecular chain, and a net structure is formed on the surface of the whole material. The effect of the unipolar functional group POSS is to improve the stability of the low-temperature carbonized powder in the high-temperature carbonization process, and more importantly, the unipolar functional group POSS is to provide a channel for subsequent hydrofluoric acid corrosion, etch away non-conductive substances and improve the conductivity and specific surface area of the carbon electrode material.

The invention discloses a preparation method and application of a pH-responsive controllable oil-water separation material, polyurethane sponge is used as a substrate, polypyrrole is attached to the sponge substrate through an in-situ polymerization method, a pH-responsive polymer is introduced into the sponge substrate through a soaking method, and finally the pH-responsive controllable oil-water separation material is obtained. The controllability of the material in the oil-water separation process is reflected as follows: due to the introduction of the pH responsive polymer, the surface of the material has pH responsiveness, the surface of the material has different wettability by adjusting the pH value, different types of oil-water mixtures can be controllably separated in a targeted manner, and the adsorption and desorption of oil products can be realized. Due to the introduction of polypyrrole, the material has good photo-thermal conversion capacity, the viscosity of crude oil can be effectively reduced, and the absorption rate of the crude oil can be improved. The material with pH responsiveness has wide application prospects in the fields of oil-water separation, oil product adsorption and desorption and crude oil absorption.

The invention relates to the technical field of lithium batteries, in particular to a composite binder aqueous solution, a silicon-based negative pole piece and a preparation method and application of the silicon-based negative pole piece. The preparation method of the composite binder aqueous solution comprises the following steps: dissolving a water-based polymer binder and a micromolecular physical crosslinking agent in water, adding pyrrole, stirring, adding an initiator, and mixing to obtain the composite binder aqueous solution. A small molecule physical cross-linking agent is introduced into the water-based polymer binder, and a large number of hydrogen bond binding sites are increased, so that the mechanical property of the binder is remarkably enhanced, and the machinability of the pole piece is further improved. Meanwhile, polypyrrole can be generated in the binder through in-situ polymerization, and the polypyrrole can be tightly coated on the surfaces of the silicon particles through strong interaction between the binder and the silicon particles to form a stable conductive network, so that the charge transfer capability of the electrode is remarkably improved. In addition, the composite binder is also beneficial to formation of a solid electrolyte layer rich in Li-N and participates in formation of a solid electrolyte interface layer, so that the lithium ion transmission capability of the composite binder is further improved.

The invention relates to the technical field of batteries, in particular to a solid electrolyte, a battery containing the solid electrolyte and a preparation method of the solid electrolyte. Wherein the solid electrolyte is prepared from an electrolyte precursor through a thermally initiated in-situ polymerization process; the electrolyte precursor comprises cellulose, a polymer monomer, a lithium salt, a plasticizer, an additive and a thermal initiator; according to the invention, cellulose is dissolved in a solid electrolyte precursor and is uniformly compounded with the diaphragm during in-situ polymerization, so that the thermal shrinkage resistance of the diaphragm and the overall safety of the battery are improved; compared with a process for improving the safety by using cellulose on the diaphragm side, the method has the advantages that the diaphragm does not need to be subjected to any additional treatment, the thickness of the diaphragm is not increased, and the prepared battery is good in comprehensiveness and low in cost; in the preparation process of the battery, the cellulose-containing solid electrolyte and the diaphragm are compounded to form a solid electrolyte-diaphragm compound with high mechanical strength and high thermal stability, so that the resistance of the battery to thermal runaway is improved.

The invention relates to an in-situ polymerized flame-retardant perfluorogel electrolyte, a lithium metal battery and a preparation method, the in-situ polymerized flame-retardant perfluorogel electrolyte is prepared from a fluorinated organic solvent, a lithium salt, a fluorine-containing polymer precursor and a thermal initiator, and the fluorine-containing polymer precursor further comprises a fluorine-containing polymer and a cross-linking agent. Compared with the prior art, the composite material has a high electrochemical window and excellent flame retardant property, and can realize matching with a high-voltage high-nickel positive electrode at room temperature and stable circulation of a high-voltage lithium metal battery; the preparation method is simple, the interface performance is optimized, and large-scale preparation is easy to realize.

The invention relates to a concrete anti-cracking self-repairing agent in the technical field of building materials, and aims to solve the problem that concrete cracks are difficult to self-repair. According to the technical scheme, the self-repairing agent is characterized by comprising a microbial repairing unit formed by ZSM-5 type zeolite molecular sieve loaded bacillus pasteurii spores, mesoporous silica particles loaded with L-calcium aspartate and Fe3O4 (at) SiO2 core-shell nanoparticles which are fixed through an in-situ polymerization coating layer to form a magnetic thermal response capsule layer coating the surface of the microbial repairing unit, pLGA microspheres containing yeast extract are positioned on an interface of zeolite and hydrogel, and a trehalose-anhydrous calcium chloride eutectic compound is used as a directional mineralization accelerant. The concrete anti-cracking self-repairing agent provided by the invention is mainly used for intelligent identification and self-repairing of concrete cracks, and efficient repairing is realized through a microbial mineralization, calcium ion slow release and magnetic thermal response synergistic mechanism.

The invention discloses a polymer drug-loaded particle for targeted adhesion to an intestinal inflammation area and a preparation method and application thereof.The method includes the steps that degradable polymer drug-loaded particles are subjected to surface modification through polycations and then added into a monomer solution of an adhesion layer, particle surface in-situ polymerization is initiated through ultraviolet irradiation, and a PAN adhesion layer is formed; the adhesion layer modified polymer drug-loaded particles are obtained. Wherein the polycation is used as a middle layer, so that the PAN adhesion layer can be successfully modified. Carboxyl in the adhesion layer enables the particles to present negative charges, meanwhile, succinimide ester can react with amino naturally existing on the surface of inflammatory intestinal tissue to generate an amide covalent bond, and finally targeted adhesion of the intestinal inflammation part is achieved. According to the adhesion strategy, the PAN can be effectively applied to the micro-nano-scale drug-loaded particles so as to enhance the adhesion of the micro-nano-scale drug-loaded particles in an intestinal tract damaged area, and a brand new thought is provided for treating inflammatory intestinal tracts.

The invention discloses a method for preparing hydrophobic SiO2 aerogel through in-situ polymerization. The method comprises the following steps: (1) uniformly mixing and stirring an alcohol solvent, a silicon source, water, an in-situ modifier and a catalyst to obtain a mixed solution; (2) adding an acid adjusting solution into the obtained mixed sol solution to hydrolyze the mixed sol solution, and adding an alkali adjusting solution to polymerize the mixed sol solution; (3) gum dipping: dipping the silica sol solution into the inorganic fiber material through a gum dipping process to obtain a compound of the silica sol and the inorganic fiber material, and standing to obtain a gel composite material; (4) aging: adding the obtained composite gel material into an aging liquid mixed solution; and (5) immersing the aged wet gel in an organic solvent, and then feeding into a supercritical drying kettle for supercritical drying treatment to obtain the SiO2 aerogel composite material. By adopting an in-situ polymerization method, the use of a hydrophobic modifier is reduced, the aerogel preparation process period is shortened, and the production process is simple.

The invention relates to a phenolic resin modified carbon molecular sieve and a preparation method and application thereof, and belongs to the technical field of adsorbents. The technical problem to be solved by the invention is to provide the phenolic resin modified carbon molecular sieve, and the adsorption selectivity is improved. The method comprises the following steps: a, in-situ polymerization: mixing phenolic resin polymerization mother liquor with a carbon molecular sieve, standing for adsorption, and heating the adsorbed carbon molecular sieve for polymerization reaction to obtain a polymerization product; the phenolic resin polymerization mother liquor comprises a phenolic substance, an aldehyde substance and a solvent; and b, carbonization modification: roasting the polymerization product in a protective atmosphere to obtain the phenolic resin modified carbon molecular sieve. The carbon molecular sieve is modified through phenolic resin in-situ polymerization, and the method is simple, low in cost, high in reaction controllability and suitable for industrial production. The phenolic resin modified carbon molecular sieve has selective adsorbability, can be applied to an N2 / CH4 system, selectively adsorbs N2, and is high in separation ratio and good in stability.

The invention relates to the technical field of fibers, and discloses an antibacterial and antistatic fiber material based on silver ions and halamine and a preparation method of the antibacterial and antistatic fiber material. The preparation method comprises the following steps: loading a methyl methacrylate-based polymer on the surface of a silver-loaded molecular sieve through an in-situ polymerization method, and grafting a halamine antibacterial monomer chlorinated piperidinol through an ester exchange reaction to obtain an antibacterial agent; the preparation method comprises the following steps: carrying out reaction polymerization on caprolactam, quaternized polyether, polyethylene glycol, 2, 6-dipicolinic acid and adipic acid to obtain an antistatic agent; an antibacterial agent, an antistatic agent and nano-silver are added into chemical fiber slices, the antibacterial and antistatic fiber material based on silver ions and halamine is prepared after melt spinning, and the chemical fiber slices are polyester slices or chinlon slices or polypropylene slices. The fiber material has excellent antibacterial and antistatic properties.

The invention discloses a diaphragm-coated MOFs glass in-situ polymerization solid electrolyte and a preparation method and application, and relates to the technical field of composite solid electrolytes.The diaphragm-coated MOFs glass in-situ polymerization solid electrolyte comprises a polymer monomer, MOFs glass, metal salt and a binder, MOFs glass powder, the binder and a solvent are evenly mixed according to the proportion, then the two faces of a diaphragm are coated with the mixture, the diaphragm coated with the MOFs glass is obtained through drying, and the diaphragm coated with the MOFs glass is obtained. And adding a polymer monomer with a certain concentration, a metal salt and an initiator solution to the diaphragm coated with the MOFs glass, and carrying out in-situ polymerization on the monomer in the battery on the MOFs glass diaphragm under the condition of thermal initiation or photo-initiation, so as to obtain the diaphragm-coated MOFs glass in-situ polymerization solid electrolyte. By adding the MOFs glass, the ionic conductivity of the polymer is remarkably improved, and the mechanical strength of the composite solid electrolyte is enhanced, so that the metal dendritic crystal inhibition capability is improved, and the problems of poor interface contact, poor ionic conduction capability, low mechanical strength and the like of the existing solid electrolyte at present are solved.

The invention discloses a deep eutectic-based polymer semi-solid electrolyte as well as a preparation method and application thereof, and belongs to the technical field of solid-state lithium metal batteries. The method comprises the following steps: mixing and melting lithium salt and succinonitrile to obtain a deep eutectic solution; dissolving a polymer monomer and a thermal initiator in the deep eutectic solution at normal temperature to obtain a precursor solution; the method comprises the following steps: soaking a lithium metal negative electrode in fluoroethylene carbonate, and airing to obtain a pretreated negative electrode; and assembling the battery according to the sequence of the negative electrode shell, the pretreated negative electrode, the cellulose membrane, the positive electrode and the positive electrode shell, and performing in-situ polymerization reaction in a heating state to obtain the lithium ion battery. The semi-solid electrolyte obtained through in-situ polymerization has relatively good interfacial compatibility with the lithium metal negative electrode, so that the battery performance is remarkably improved; the addition of a small amount of polyester containing a plurality of urea groups not only retains the high electrochemical performance of a liquid electrolyte, but also has the high safety of a solid electrolyte.

The invention belongs to the technical field of sodium ion negative electrode material preparation, and particularly relates to a double-layer carbon-coated sodium ion battery hard carbon negative electrode material as well as a preparation method and application thereof. The method comprises the following steps: firstly, dispersing activated carbon powder into a tris (hydroxymethyl) aminomethane hydrochloride buffer solution, and then adding dopamine hydrochloride to carry out self-polymerization reaction, so as to obtain activated carbon powder coated with a first layer of polydopamine; then putting the activated carbon powder into a second layer of carbon source precursor solution, and heating in a water bath to obtain double-layer carbon-coated activated carbon powder; and finally, carrying out heat treatment. The preparation method comprises the following steps: firstly, coating the surface of activated carbon with a first layer of polydopamine by an in-situ polymerization method, then promoting uniform coating of a second layer of carbon source precursor by utilizing strong adhesion of the polydopamine, and carrying out heat treatment to obtain the double-layer carbon-coated hard carbon negative electrode material. The hard carbon negative electrode material can improve the energy density of the current sodium ion battery and accelerate the industrial application of the sodium ion battery.

The invention discloses a method for preparing a polyester fabric through cyclic regeneration of waste polyester textiles, belongs to the technical field of polyester recovery, and is used for solving the technical problem that the mechanical property and antibacterial ability of a regenerated polyester fabric in the prior art need to be further improved. The method comprises the following steps: adding the waste polyester textile and modified multilayer graphene into a high-pressure reaction kettle, carrying out carbon dioxide supercritical depolymerization to obtain a depolymerized mixed solution, preparing the modified multilayer graphene, slowly releasing supercritical fluid by virtue of an abundant gap structure, and preparing the modified multilayer graphene into the high-pressure reaction kettle. According to the preparation method, modified multilayer graphene is modified, the depolymerization effect is improved, meanwhile, rich active functional groups on the surface provide in-situ polymerization sites for a depolymerization monomer, the depolymerization monomer serves as a polymerization hub structure to provide support for an organic chain segment, a space structure is hybridized through a chain extender, finally, the flame-retardant antibacterial liquid is prepared, effective components of the flame-retardant antibacterial liquid are cross-linked with the modified multilayer graphene, and the flame-retardant antibacterial performance is improved. In the combustion process, the chain extender is promoted to be carbonized, and the regenerated polyester fabric which is flame-retardant, antibacterial and excellent in mechanical property is obtained.

The invention provides a solid polymer electrolyte capable of working in a wide temperature range. The solid polymer electrolyte is obtained by carrying out in-situ polymerization on a precursor solution on the surface of a base material, wherein the precursor solution is prepared from a first type of polymeric monomer, a second type of polymeric monomer, an initiator and electrolyte salt; the first polymeric monomer is an electron donor, and the electron donor is at least one of cyclic ether and olefin monomers; the second polymeric monomer is an electron acceptor, and the electron acceptor is one or more of cyclic ester, olefin monomers and anhydride monomers. The solid polymer electrolyte keeps good mechanical performance and high ionic conductivity in a wide temperature range, and an assembled solid secondary battery has good electrical performance and cycling stability.

The invention discloses a super-hydrophobic road ice-inhibiting coating based on a photothermal effect and nano modified particles and a preparation method of the super-hydrophobic road ice-inhibiting coating. The preparation method comprises the following steps: introducing silane modified nano silicon dioxide (SiO2) and titanium dioxide (TiO2) particles into a polyaniline solution, and preparing the composite super-hydrophobic powder through a chemical oxidation polymerization method. The preparation method comprises the following steps: firstly, modifying the surfaces of SiO2 and TiO2 nanoparticles by adopting a silane coupling agent, and endowing the SiO2 and TiO2 nanoparticles with low surface energy and hydrophobic property; and then adding the modified nano-particles into an aniline monomer solution, reacting with doped acid and an oxidizing agent, so that polyaniline molecules are subjected to in-situ polymerization on the surfaces of the particles, and the composite super-hydrophobic powder with a micro-nano structure is formed. The obtained composite material has excellent photothermal conversion performance and super-hydrophobic performance at the same time, and the efficient photothermal material heat absorption ice melting effect and the synergistic ice restraining effect of the photothermal material and the super-hydrophobic material can be achieved. Compared with a traditional ice-inhibiting coating, the coating disclosed by the invention shows stronger ice-resisting capability in a low-temperature and high-humidity environment, has good durability, mechanical stability and environmental protection property, and is suitable for the field of ice prevention and ice inhibition in cold regions such as roads, bridges, airport runways and the like.

The invention belongs to the technical field of new energy materials and devices, and relates to a gel electrolyte, a preparation method and a solid-state lithium battery, a liquid novel initiator with a low freezing point, a cyclic ether polymeric monomer and a plasticizer are mixed to form a homogeneous precursor solution, the precursor solution is injected into a battery shell, standing is performed at normal temperature (20-35 DEG C) for in-situ polymerization, and the solid-state lithium battery is obtained. And the gel electrolyte-based solid-state battery can be obtained. The gel electrolyte is initiated by a novel initiator, and compared with a common initiator, the gel electrolyte has better low-temperature performance, and a high-performance solid-state lithium battery is formed.

The invention provides a non-Newtonian fluid quasi-solid electrolyte, a preparation method and application, the electrolyte is prepared from the following raw materials: a basic electrolyte, a shear thickening raw material, a polymeric monomer, a cross-linking agent and a thermal initiator, and the mass ratio of the basic electrolyte to the shear thickening raw material is 20: (1-10). The quasi-solid electrolyte with the non-Newtonian fluid characteristic is used for absorbing stress caused by lithium plating / lithium removal of the battery, the volume change of the battery in the charging and discharging process is relieved, mechanical hardening is rapidly generated when the battery is subjected to large-current pulse charging or external sudden bearing, the growth of lithium dendrites is inhibited, and internal short circuit is prevented; a polymer network obtained by carrying out in-situ polymerization on a polymeric monomer, a cross-linking agent, a thermal initiator and the like is adopted, so that battery liquid leakage or oxygenolysis is prevented, metal lithium is deposited and dissolved more uniformly, and the growth of metal lithium dendrites is inhibited; through the synergistic effect of the non-Newtonian fluid and the in-situ polymerized polymer network, the safety performance and the cycle performance of the battery can be remarkably improved.

The invention discloses a multi-scale synergistically enhanced self-healing solid polymer electrolyte and a preparation method thereof, and belongs to the technical field of electrolyte materials. The preparation method of the electrolyte comprises the following steps: S1, adding the eight-arm star polymer, the carborane lithium salt, the neutral plastic crystal additive, the ionic liquid monomer and the crown ether functionalized boron alkene two-dimensional filler into a mixed solvent to form electrolyte slurry; s2, uniformly coating a base material with the electrolyte slurry to form a wet film, and drying the wet film; s3, transferring the dried membrane to an environment filled with inert gas, and initiating in-situ polymerization of an ionic liquid monomer by using ultraviolet irradiation to form a polyionic liquid nanofiber network; and S4, placing the membrane under a vacuum condition at a constant temperature of 120 DEG C for 5 hours to obtain the solid polymer electrolyte membrane. The solid polymer electrolyte membrane provided by the invention overcomes the problems of low ionic conductivity, low lithium ion transference number, insufficient mechanical properties, poor interface stability, narrow electrochemical window and the like of the existing solid polymer electrolyte.

The invention belongs to the field of environment-friendly materials, and particularly discloses a waste plastic recycling method which comprises the following steps: selecting one or a mixture of more of waste PET (Polyethylene Terephthalate), PP (Polypropylene), PVC (Polyvinyl Chloride), PS (Polystyrene) and PC (Polycarbonate) as a base material; adding organic silicon-graphene, a bio-based polyester-carbon nanotube composite modifier and a reinforcing agent, wherein the addition amount is 3-8% of the weight of the base material; flame-retardant and antioxidant auxiliaries are matched; the method comprises the following steps: carrying out plasma and enzyme catalysis pretreatment on waste plastic, premixing with other components by a high-speed mixer, carrying out melt blending in a double-screw extruder under the assistance of supercritical fluid, promoting dispersion by ultrasonic and microwave during the period, and simultaneously carrying out photo-initiation in-situ polymerization; finally, a product is prepared through injection molding, extrusion and other molding processes. The performance of the waste plastic recycled material is greatly improved, the mechanical performance, the electrical performance, the barrier performance and the like of the recycled material are remarkably improved, and the waste plastic recycled material can be widely applied to more fields.

The invention discloses a perfluoropolyether blended PEGDE-based solid electrolyte and a preparation method thereof, and belongs to the technical field of lithium metal battery solid electrolyte materials. Adding SnCl4 and TAA into the nanocellulose precursor solution, stirring, carrying out suction filtration, and drying to obtain a SnS2 (at) NC support layer; and mixing and stirring PEGDE, LiDFOB, LiTFSI and PFPE to obtain PEGDE-based solid electrolyte slurry, coating the SnS < 2 > (at) NC supporting layer with the PEGDE-based solid electrolyte slurry, and performing in-situ polymerization in a drying oven to obtain the PEGDE-based solid electrolyte. The ultrathin perfluoropolyether blended PEGDE-based solid electrolyte prepared based on PEGDE in-situ polymerization and perfluoropolyether blending and in combination with nanocellulose enhancement has the advantages of stable anode interface, high mechanical strength, high decomposition voltage and high ion transference number.

The invention provides an organic functional group modified silicon negative electrode material as well as a preparation method and application thereof, and belongs to the field of battery negative electrode materials. The method comprises the following steps: pre-hydrolyzing a silane coupling agent to obtain a mixed solution; adding a silicon material into the mixed solution to bond a silane coupling agent on the surface of the silicon material to obtain an intermediate; and performing in-situ polymerization on the intermediate, a polymer monomer and an initiator to form a conductive polymer on the surface of the intermediate, thereby obtaining the silicon negative electrode material. The preparation method comprises the following steps: firstly, carrying out condensation reaction on a hydrolyzable functional group of a silane coupling agent and silicon hydroxyl on the surface of the photovoltaic silicon waste after hydrolysis to form chemical bonding; meanwhile, non-hydrolytic functional groups in the silane coupling agent are partially retained on the surfaces of the silicon particles, so that polymerization sites are provided for subsequent polymerization reaction; and then modification of different organic functional groups is realized through simple in-situ polymerization, so that a confinement effect and stress dissipation in a particle expansion process are realized, and huge volume expansion of the silicon particles is relieved.