270 results about "Composite polymer" patented technology

The invention belongs to the technical field of lithium ion solid-state batteries, and relates to a composite polymer electrolyte membrane as well as a preparation method and application thereof. The preparation method of the composite polymer electrolyte membrane comprises the following steps: generating a precursor salt containing Ba and Ti on the surface of an inorganic solid electrolyte through a wet chemical method, and forming a compact barium titanate coating layer on the surface of the electrolyte in a high-temperature calcination process to obtain the barium titanate surface modified inorganic solid electrolyte; uniformly dissolving a high-molecular polymer material, the barium titanate surface modified inorganic solid electrolyte and a lithium salt in a solvent, heating and stirring to prepare a uniform solution; and drying to form a membrane to obtain the polymer composite electrolyte membrane. Barium titanate has a special piezoelectric property and can be spontaneously polarized in a crystal structure to generate a polarization field, and the polarization field can sensitively sense the nonuniformity of lithium ion transmission dynamics and interact with the nonuniformity to balance the transmission process of lithium ions in the solid electrolyte, so that the bottleneck problem of ion migration in the traditional electrolyte is solved.

An exemplary embodiment of the present disclosure provides a method for making an electrolyte, comprising: providing a solid polymer electrolyte (SPE); incorporating boron nitride with the SPE to form a composite polymer electrolyte (CPE), wherein the boron nitride is at least one of exfoliated hexagonal boron nitride (ex-BN) or fluorine-fimctionalized hexagonal boron nitride (BN-F).

The invention belongs to the technical field of cosmetics, and particularly relates to a cosmetic delivery system based on a natural wall material, a preparation method and application. The cosmetic delivery system is of a core-shell structure, a core is a cosmetic active component, and a shell layer is a composite polymer gel network of sodium alginate, sophorolipid and cellulose. The natural polysaccharide composite wall material is green and safe, has good biocompatibility and strong compatibility with cosmetic formulas, and does not irritate the skin. The delivery system can effectively protect cosmetic active ingredients from being damaged by illumination and oxygen, and the storage stability of the active ingredients is remarkably improved; meanwhile, slow release and targeted transdermal absorption of active ingredients are realized, and the bioavailability is improved.

The embodiment of the invention provides an electrolyte and a preparation method thereof, a battery and a power utilization device. The electrolyte comprises a polymer electrolyte substrate, an inorganic additive and a functional additive, the functional additive can prevent the inorganic additive from physical agglomeration and chemical denaturation. In the embodiment of the invention, the functional additive is introduced into the composite polymer electrolyte of the polymer electrolyte substrate and the inorganic additive, and the functional additive can maintain the stability of the slurry, so that the physical agglomeration and chemical denaturation of the inorganic additive are prevented, and the problem of poor interface stability between the polymer and the inorganic additive is further improved.

The invention discloses a preparation method and application of an all-solid-state lithium-sulfur battery composite solid electrolyte, and belongs to the technical field of all-solid-state lithium-sulfur batteries. The preparation method comprises the following steps: firstly, preparing organic metal framework MOF particles with an ordered porous structure by adopting an oil bath method, taking polyethylene oxide as a substrate, adding an inorganic filler to prepare a composite polymer electrolyte membrane, and adding the MOF particles on the basis of the electrolyte membrane to prepare the composite solid electrolyte CPE-MOF. The MOF material prepared by the method shows a typical cubic structure, has a micron size, has good repeatability and controllability, and lays a solid foundation for research and application of subsequent material performance. The composite solid electrolyte prepared by the invention is applied to an all-solid-state lithium-sulfur battery, and shows relatively high specific discharge capacity, stable cycle performance and good rate capability.

The present application belongs to the technical field of polymer dielectric energy storage material, and discloses a preparation method of a full-organic small-molecule composite polymer film and a product. The preparation method comprises the following steps: mixing a mixed solution of PVDF and PMMA with a PE EU solution to form a pre-preparation solution; casting the pre-preparation solution on a substrate and heating and drying, and then heat treating in a vacuum environment to obtain the required composite polymer film. The present application also discloses the product prepared by the above preparation method. Through the present application, the problems of low discharge energy density and charge-discharge efficiency of ferroelectric-based polymer films are solved.

The present invention relates to the field of electrolytes for lithium-ion batteries. In a first aspect, the present invention concerns a lithium-ion battery comprising a composite polymer electrolyte, wherein the composite polymer electrolyte comprises a lithium salt, a polymer, and γ- LiAlO2 particles, wherein the average particle size of the γ-LiAlO2 particles is at least 2 μm, and wherein the polymer is selected from a polyether, polycarbonate, polyketone, polyester, polynitrile, copolymers thereof and / or a combination thereof. In a second aspect, the present invention concerns a solution comprising a solvent, a lithium salt, a polymer, and γ-LiAlO2 particles; wherein the average particle size of the γ-LiAlO2 particles is at least 2 μm, and wherein the polymer is selected from a polyether, polycarbonate, polyketone, polyester, polynitrile, copolymers thereof and / or a combination thereof.

The invention relates to a solid-state battery positive pole piece with a composite structure as well as a preparation method and application thereof. The solid-state battery positive pole piece comprises a current collector, a composite positive pole coating attached to the surface of one side of the current collector, and a composite polymer coating attached to the composite positive pole coating, the composite positive electrode coating comprises a positive electrode active material, a first oxyfluoride solid electrolyte, a binder and a conductive agent; the composite polymer coating comprises an in-situ polymerized polymer of a three-dimensional network structure, and a lithium salt and a second oxyfluoride solid electrolyte which are filled in gaps of the three-dimensional network structure; the polymer is formed by initiating in-situ polymerization of a polymer monomer through a thermal initiator; and a composite polymer coating is immersed in a gap of the composite positive electrode coating. The positive pole piece of the solid-state battery has high ionic conductivity, high interface stability and high mechanical reliability, and the cycle performance of the solid-state lithium battery can be improved when the positive pole piece is applied to the solid-state lithium battery.

The invention provides a method for removing phosphorus from a cobalt sulfate solution. The method comprises the following steps: providing a cobaltous sulfate solution to be treated; the method comprises the following steps: mixing a to-be-treated cobaltous sulfate solution, a composite polymer soluble ferric salt and a coagulant aid, carrying out precipitation reaction, and separating to obtain phosphorus-containing slag and cobaltous sulfate primary purified liquid; a deep phosphorus removal adsorbent is adopted to adsorb trace phosphorus in the cobalt sulfate primary purification liquid, then trace iron in the cobalt sulfate primary purification liquid generates precipitates in an oxygen-containing atmosphere, and after separation, a cobalt sulfate secondary purification liquid is obtained. According to the method, firstly, the synergistic effect of the composite polymer soluble ferric salt and the coagulant aid is adopted, and primary efficient removal of phosphorus is achieved; then, a deep phosphorus removal adsorbent is used for directionally adsorbing trace phosphorus in the cobalt sulfate primary purification liquid, so that deep removal of phosphorus is further realized; and finally, the residual trace iron is precipitated and separated in the oxygen-containing atmosphere, so that the purity of the secondary purified cobalt sulfate liquid is further guaranteed.

The invention discloses copper tailings-based ecological soil and an adopted conjugate improvement method, the copper tailings-based ecological soil comprises lime modified copper tailings and a tailings modifier, and the tailings modifier comprises a soil structure building agent, clay and water; the soil structure building agent comprises a composite high polymer material, an organic fertilizer and an anti-reflection fertilizer-retaining mineral material; the composite high polymer material contains xanthan gum and polyacrylamide, and the organic fertilizer contains humic acid. According to the method, the copper tailings serve as matrix soil, a good ecological environment suitable for plant growth is built by conducting in-situ modification on the tailings, the problems that soil is difficult to take through a soil dressing method and the like are effectively solved, and the ecological management time cost and the economic cost are saved; besides, the improved copper tailings are expected to achieve effective consideration of the characteristics of water retention / water permeability, agglomeration / loosening, air permeability / fertilizer retention and the like, high-added-value resource utilization of the copper tailings is achieved, a large-area copper tailings covering area is improved to form a good carbon sink area, and important economic and environmental benefits are achieved.

The application provides a solid electrolyte membrane and a preparation method thereof, a secondary battery and an electric device. The solid electrolyte membrane of the application comprises the following components: polyvinylidene fluoride or a copolymer thereof, polyimide or a copolymer thereof, an electrolyte salt, and an aminopolycarboxylate. The solid electrolyte membrane is prepared by taking polyvinylidene fluoride or a copolymer thereof as a matrix, and adding polyimide and an aminopolycarboxylate to improve the crystallization performance of polyvinylidene fluoride, so that a dense, high Young's modulus, flame-retardant composite polymer electrolyte membrane is obtained. The solid electrolyte membrane prepared by the application has a Young's modulus of ≥ 9.5 GPa at a thickness of 10 μm, an ionic conductivity of > 4*10 ‑4 S / cm at 25 ℃, and a capacity retention rate after 600 cycles at 1 C, all of which are above 85%.

A nano composite polymer brush production device relates to the technical field of nano material manufacturing equipment, and is formed by connecting a plurality of groups of production units through a transportation mechanism, and each production unit comprises a coaxial magnetic control plasma reactor, a honeycomb microchannel reactor, an acoustic streaming resonance separation tower and a spray drying former, wherein a separation cavity is vertically arranged on a base of the acoustic streaming resonance separation tower, a reducing part at the bottom of the separation cavity is connected to an external container through a heavy phase outlet, the top of the separation cavity is provided with a light phase outlet of a hollow cone of which the top is reduced, and the outer surface of the separation cavity is provided with an Archimedes spiral flow channel which extends from bottom to top and is provided with a plurality of groups of ultrasonic transducers; the bottommost end of the flow channel is connected with the inlet of the separation tower, and the outlet at the topmost end extends into the separation cavity and points to the light phase outlet; through the synergistic effect of the sound field and the Dean vortex, additional fluidization equipment is not needed, directional migration and enrichment of the brush layer nanoparticles can be effectively achieved, and the purity of the produced final product can reach 99% or above.

The invention belongs to the technical field of adsorption materials and application thereof, and particularly relates to a metal ion liquid porous carbon material, a preparation method thereof and application of the metal ion liquid porous carbon material in aromatic hydrocarbon adsorption, and the preparation method comprises the following steps: S1, preparing a composite polymer by taking thermosetting phenolic resin, o-dihydroxybenzene, a Lewis acid complexing agent, dichloromethane and a cross-linking agent as raw materials; s2, performing carbonization treatment on the composite polymer in a nitrogen atmosphere to obtain a carbon material; and S3, infiltrating the carbon material into ionic liquid, stirring and drying to obtain the metal ionic liquid porous carbon material. The metal ion liquid porous carbon material prepared by a polymerization-carbonization-modification process has excellent pore structure and surface properties, can enhance the acting force with aromatic hydrocarbon molecules when being used as an adsorbent, has high adsorption capacity and selectivity on aromatic hydrocarbon, and realizes effective separation of aromatic hydrocarbon and non-aromatic hydrocarbon.

This invention belongs to the field of road engineering materials technology and discloses a wear-resistant and impermeable recycled asphalt and its preparation method. Addressing the problems of poor wear resistance, insufficient impermeability, and unsatisfactory high and low temperature performance of traditional recycled asphalt, this invention uses recycled asphalt and base asphalt as base materials, and combines them with a composite nano-modifier, a composite polymer modifier, basalt fiber, an organosilicon waterproofing agent, a compatibilizer, and an anti-aging agent to prepare recycled asphalt. In the preparation process, the recycled asphalt is first melted and mixed with the base asphalt, and then each modifying component is added sequentially. The mixture is then subjected to high-speed shearing, stirring, and heat preservation development processes to obtain the finished product. This invention, through the synergistic effect of multiple components, significantly improves the wear resistance, impermeability, low-temperature crack resistance, and high-temperature stability of recycled asphalt, effectively extending the service life of recycled asphalt pavements. Furthermore, the preparation process is simple, easy to industrialize, and offers both good economic and environmental benefits.

This invention belongs to the field of solid-state electrolyte technology, specifically providing a method for in-situ construction of polymer salt / inorganic filler heterogeneous interfaces in composite solid-state electrolytes and its application. This invention utilizes single-ion polymer side-chain anionic groups to simultaneously achieve in-situ sol-gel catalysis and lithium salt anion anchoring, generating a molecularly uniform composite polymer salt / inorganic filler heterogeneous interface in the electrolyte matrix. This solves key problems such as filler agglomeration, high interfacial impedance, and significant space charge layer in traditional mechanical blending, significantly improving lithium-ion transport efficiency and overall electrolyte performance. This method is simple, environmentally friendly, and suitable for the preparation of high-performance composite solid-state electrolytes.

The present invention provides a novel composite polymer material with excellent mechanical properties, a method for producing the composite polymer material, and an optical material containing the composite polymer material. The composite polymer material of the present invention contains a crosslinked polymer formed by crosslinking a silicone-based polymer S having a polysiloxane backbone as a main chain with a polymer P having a backbone other than a polysiloxane backbone as a main chain, wherein host-guest interaction based on a host group and a guest group is formed between the silicone-based polymer S and the polymer P, and the host group is a monovalent group formed by removing one hydrogen atom or one hydroxy group from a cyclodextrin or a cyclodextrin derivative.

The invention relates to the field of building materials, in particular to SAP functional aggregate for concrete, a preparation method of the SAP functional aggregate and a preparation method of the concrete. The SAP functional aggregate for concrete comprises coal gangue ceramsite, the coal gangue ceramsite comprises a ceramsite core with a porous structure, SAP particles are adsorbed on the ceramsite core, the periphery of the coal gangue ceramsite is coated with a packaging film, and a composite polymer is formed by mixing polyvinyl alcohol and epoxy resin. The coal gangue ceramsite with a porous structure is used as a core for absorbing SAP particles, and then the water absorption rate is limited through a packaging film; when the functional aggregate is used in concrete, the packaging film realizes slow and controllable release of water, the hydration process is physically regulated and controlled, and a heat release curve is slowed down; the problems that in the prior art, the SAP is directly added into the concrete, so that the SAP rapidly absorbs a large amount of water, and consequently the workability of the concrete is lost, and the mechanical property is degraded are solved.

This invention provides a method for preparing a composite polymer electrolyte membrane, mainly comprising the following steps: mixing lignin derivatives, a polymer matrix, lithium salts, and an organic solvent in a certain proportion to obtain a uniform slurry with a certain viscosity; dripping the uniform slurry onto a glass plate, coating it to a certain thickness, and then placing it in a vacuum drying oven for drying at a specific temperature and vacuum level to obtain the composite polymer electrolyte membrane. Studies have found that the composite polymer electrolyte membrane obtained by this invention has excellent film-forming properties, stable structure, and exhibits high lithium-ion transference number and high room-temperature ionic conductivity.

The utility model relates to a disposable transfer nursing drawsheet which comprises a composite polymer drawsheet assembly and a handle assembly. The composite polymer drawsheet assembly and the handle assemblies are rectangular, the handle assemblies are connected to the edge openings of the long edges of the two sides of the composite polymer drawsheet assembly, a plurality of handle holes are formed in the handle assemblies at equal intervals, and the handle holes are 8-shaped; the composite polymer drawsheet assembly comprises a surface skin-friendly non-woven fabric layer, a hot melt adhesive layer, an upper tissue layer, a polymer water-absorbent resin layer, a fluff pulp layer, a lower tissue layer and a bottom lamination non-woven fabric layer. The surface skin-friendly non-woven fabric layer, the upper paper towel layer, the high-molecular water-absorbent resin layer, the fluff pulp layer, the lower paper towel layer and the bottom laminated non-woven fabric layer are sequentially connected in a laminated manner; a hot melt adhesive layer is arranged between the surface skin-friendly non-woven fabric layer and the upper tissue layer, and a hot melt adhesive layer is arranged between the lower tissue layer and the bottom lamination non-woven fabric layer.

This invention belongs to the field of solid-state electrolyte technology, specifically relating to a high-pressure resistant composite polymer solid-state electrolyte, its preparation method, and its application. The solid-state electrolyte comprises: a high-pressure resistant terpolymer, a PVDF-based polymer, mullite filler, and a lithium salt; the high-pressure resistant terpolymer is prepared from a high-pressure resistant additive, a crosslinking agent, ethylene ethylene carbonate monomer, and an initiator; the high-pressure resistant additive is selected from at least one of propylene-1,3-sulfonyl lactone, cyclobutene sulfone, and 3-methyl-3-cyclobutene sulfone. The preparation method is as follows: the high-pressure resistant additive, crosslinking agent, initiator, lithium salt, and ethylene ethylene carbonate monomer are mixed to obtain a precursor solution; the PVDF-based polymer and mullite filler are stirred and mixed in a solvent, coated into a film, and vacuum dried to obtain a base film; the base film is immersed in the precursor solution, and after immersion, it is cured to obtain the high-pressure resistant composite polymer solid-state electrolyte.

An in-situ polymerization dioxolane polymer solid electrolyte, a fluorinated magnesium interface layer, a battery and a preparation method thereof, 1,3-dioxolane, lithium salt and magnesium-containing montmorillonite are uniformly mixed to obtain a mixed solution, then the mixed solution is immersed into a support, matched with a lithium metal negative electrode and a positive electrode to assemble a full battery, and placed for a period of time, and a polymerized dioxolane composite polymer solid electrolyte is prepared through an in-situ polymerization reaction. The magnesium ions spontaneously aggregated on the surface of the montmorillonite compete with the lithium salt anions for coordination, regulate the coordination environment of lithium ions in the electrolyte, increase the number of free lithium ions, and thus improve the ionic conductivity of the electrolyte. In addition, the magnesium ions and the lithium salt anion ligands decompose at the positive and negative electrode interface to participate in the formation of the interface layer, producing an inorganic component-rich interface layer (CEI and SEI) containing fluorinated magnesium, which has a high Young's modulus and fast lithium ion transport kinetics, is beneficial to the rapid transport of lithium ions and improves the stability of the electrolyte and the positive and negative electrode interface, and thus has a good application prospect.

Page 1 of 1 Summary of the invention. The current invention involves a composite polymer element. a) Bi- or multimodal LLDPE b) Compounds according to the following formula (I): chemical formula where Each group of R1, R2, R3, R4, R5, R6, R7, R8, R9, and R10 was selected independently from... Hydrogen and C1 to C10 groups, hydrocarbil; In this way, two groups from R3 to R10, located on adjacent carbon atoms, can be fused together. To form a cyclic hydrocarbilization structure; M was selected from a group consisting of calcium, strontium, lithium, zinc, magnesium, and... Monobasic aluminum; n is 1 or 2; z is 1 or 2; The sum of n+z is 3. Films made from such materials utilize polymer components that are bi- or multi-molecule. LLDPE, which is crystallized for agricultural film applications and the use of the compounds mentioned. The above is for increasing the spherical PAR transmittance of the film and / or reducing the F-scatter value. For use on films and / or for reducing film turbidity.

This invention discloses a method for preparing and applying a plant fiber composite polymer material. The preparation method includes: uniformly mixing a second polymer resin, a toughening agent, and a second auxiliary agent to form a mixture; then feeding the mixture and plant fiber masterbatch into a twin-screw extruder through a main feed port and a side feed port, respectively; simultaneously, injecting a liquid plasticizer into the twin-screw extruder via spraying; and finally, performing melt blending extrusion to obtain the plant fiber composite polymer material. The twin-screw of the twin-screw extruder includes a high-temperature, high-shear section and a low-temperature, low-shear, high-conveying section. This invention employs a dedicated high-shear and high-conveying segmented screw combination and a high- and low-temperature granulation zone design, which not only solves the problems of difficult feeding, stratification, and easy water absorption of plant fibers in traditional processes, but also solves the problems of thermal decomposition and chopping of plant fibers in the twin-screw extruder, ensuring the mechanical properties and plant appearance of the plant fiber composite polymer material.

The invention belongs to the technical field of water treatment, and particularly relates to an organic composite polymeric titanium coagulant and a preparation method thereof.The preparation method comprises the following steps that hydroxyl on sodium carboxymethylcellulose is activated and then compounded with dopamine, and a composite precursor is obtained; compounding the composite precursor with an organic coagulation material to obtain a polymer coagulation material; and compounding the polymer coagulation material with a titanium compound to obtain the organic composite polymeric titanium coagulant. According to the coagulant prepared by the method, the organic coagulation material, the sodium carboxymethyl cellulose and the dopamine are compounded with the titanium material, multiple groups cooperate with one another, the coagulation effect is good, the hydrolysis rate of titanium tetrachloride can be stabilized, and the problem that the pH is too low is solved.

The invention provides a siloxane modified composite polymer material and a preparation method thereof, and belongs to the field of polymer chemical synthesis. According to the invention, siloxane is utilized to modify an organic monomer into a silicon monomer prepolymer, so that siloxane molecules exist on side chains of organic monomer molecules, and when the modified prepolymer is subjected to thermal initiation auto-polymerization, a functional monomer is added into a system, so that the water solubility and molecular weight of a final product are improved; the problems that a common organic silicon high-molecular polymer is low in molecular weight, curing can be caused by forced expansion of the molecular weight, and emulsification and use in water are not easy are solved. The siloxane modified composite polymer material has very high molecular weight and excellent hydrophilicity, can be directly used after being diluted with pure water, is not layered after being placed at a high temperature for a long time, has excellent stability, and shows great application potential.

The invention discloses a pomacea canaliculata egg wrapping type inactivator and a preparation method thereof, and belongs to the technical field of biopesticides, the pomacea canaliculata egg wrapping type inactivator comprises a component A, a component B and a component C which are physically isolated and independently packaged, the component A is biopolymer matrix liquid and comprises a film-forming framework polymer; the film-forming skeleton polymer is alginate, a composite polymer, weak acid, an endogenous slow-release calcium source and water, and the composite polymer is chitosan; the component B is a gel activating solution and comprises a cross-linking activating agent, water and a modifying agent; the modifier is one of sodium citrate, cellulose nanocrystal or nanoclay; when the component A and the component B are in contact on the surface of an ampullaria gigas egg mass, the component A and the component B are subjected to an in-situ gel reaction to generate a layer of physical barrier gel film; the defects that an existing dehydrating agent scheme is not resistant to rain wash and poor in persistence are overcome, and the core component is derived from biomass and is environmentally friendly.

The invention relates to the technical field of polymer composite materials, in particular to a weather-resistant ultralight composite polymer material and a preparation method thereof, and the weather-resistant ultralight composite polymer material is prepared from the following raw materials in parts by weight: 65-85 parts of weather-resistant alloy matrix resin, 15-35 parts of a continuous glass fiber reinforced material, 1-6 parts of a lightweight functional system and 1.5-3 parts of a weather-resistant stable system. By designing an ASA / PC alloy matrix-continuous glass fiber reinforcement-structural micro-foaming / microbead filling three-in-one composite system, perfect unification of extreme light weight, high strength, high modulus and excellent weather resistance is realized in the polymer matrix composite material, the density of the embodiment is as low as 1.22-1.38 g / cm < 3 >, the bending strength is as high as 210-265 MPa, and the composite material has excellent weather resistance and excellent weather resistance. The bending modulus reaches 10.8-13.5 GPa, and the industrial problems that traditional materials such as aluminum plates are heavy, common plastics are weak, short fiber reinforced plastics are low in performance and obvious in anisotropy, and the requirements for light weight, high strength and outdoor long-term service cannot be met are successfully solved.

The present invention specifically relates to a method for preparing a S-rich porous zinc-based MOF flexible film. This method coordinates tetrazole with carboxyl groups and zinc ions via a hydrothermal method, using pyrazine as a template and tetramethylammonium hydroxide as a pH regulator. This yields a new S-rich porous zinc-based metal-organic framework material with special pores containing negative electrons. This material is further blended with a lithium salt and a polymer to produce a metal-organic framework composite polymer viscous liquid, which is then applied to a glass plate and allowed to stand to yield a S-rich porous zinc-based MOF flexible film. The present invention has the advantage of effectively enhancing the electrochemical and thermal stability of lithium batteries. The assembled lithium iron phosphate (LFP) battery exhibits low electrochemical impedance characteristics, with a specific capacity of 140 mAh g at a current of 0.1 C. ‑1 The capacity retention rate is close to 100%, showing excellent cycle stability and good rate performance at different current densities.

The application belongs to the technical field of solid-state batteries, and relates to a solid-state electrolyte of a solid-state battery, in particular to a cerium doped MOFs based composite solid-state electrolyte and a preparation method and application thereof. 4+ / Ce 3+ / Ce 4+ The application induces the rich Zr 4+ / Ce 3+ / Ce 4+ Multi-valence active centers, combined with the regulation effect of the interface ion flow of the graphite phase carbon nitride (g-C3N4) two-dimensional layered material, significantly improve the comprehensive performance of the composite polymer solid-state electrolyte, such as ion conductivity, electrochemical window, electrochemical stability and the like.

The invention belongs to the field of material science, and discloses a composite solid electrolyte and a preparation method and application thereof.The preparation method comprises the steps that a Bi2Te3 thermoelectric material is prepared, a polyoxyethylene (PEO) electrolyte solution is prepared, and the composite solid electrolyte is prepared, specifically, the Bi2Te3 thermoelectric material serves as filler and is added into an acetonitrile (ACN) solution; and adding into a PEO electrolyte solution after ultrasonic treatment, stirring at room temperature, casting into a polytetrafluoroethylene mold, drying at room temperature, and performing vacuum drying to obtain the composite solid electrolyte. The composite polymer solid electrolyte prepared by adopting the preparation method has high ionic conductivity and stable lithium deposition stripping performance, meanwhile, the synthesis method is simple, and large-scale industrial production can be carried out.