30results about How to "Improve chain movement ability" patented technology

The invention discloses a cross-linked polymer solid state electrolyte, the raw materials of which include modified polyethyleneimine, cross-linking agent and lithium salt, and the modified polyethyleneimine, cross-linking agent and lithium salt are heated and cross-linked It forms an interpenetrating network material; it has higher thermal stability, ionic conductivity and electrochemical window, and can be widely used in electrochemical energy storage devices such as lithium-ion batteries, supercapacitors or solar cells.

The invention discloses a preparation method of a high-temperature resistant solid-state polymer electrolyte and application of same in a lithium battery. The preparation method of the high-temperature resistant solid-state polymer electrolyte at least comprises the steps of uniformly mixing two or more polymer monomers, a conductive salt and an initiator on a molecular level to form a precursor solution according to a certain proportion, coating the precursor solution on a surface of a substrate or an electrode, and preparing the solid-state polymer electrolyte by a polymerization method. The electrolyte is directly assembled into the battery, and the battery can work in a room temperature and a high temperature. The method has the advantages of high controllability, convenience in operation, low cost and favorable application prospect. The mechanical property and the thermal stability of the polymer electrolyte obtained according to the method are maintained very well, meanwhile, the moving ability and the ionic conductivity of a polymer chain segment are improved, and thus, a synergetic enhancement effect is achieved.

The invention provides an unsaturated sulfur-containing composite electrolyte and a preparation method thereof. The unsaturated sulfur-containing composite electrolyte includes an unsaturated soluble sulfide electrolyte of the general formula shown in formula I, a polymer matrix and a lithium salt; Li 3‑x P.S. 4 , Formula I, where 0

The present invention discloses a solid polymer electrolyte and a preparation method thereof. The electrolyte includes the following components in parts by weight: 1 part of nitrile rubber, 0.02-0.8 part of octa-(polyethylene glycol)-polyhedral oligomericsilsesquioxane, and 0.1-3 parts of lithium salt. The preparation method includes the steps of providing a solvent dissolving the nitrile rubber, wherein every 1g of nitrile rubber is corresponding to 15ml-25ml solvent; adding the nitrile rubber into the solvent, and stirring at normal temperature till totally dissolving the nitrile rubber, so as to obtain a nitrile rubber solution; adding the lithium salt into the nitrile rubber solution, continuing to stir at normal temperature till totally dissolving the lithium salt, so as to obtain a primary mixed solution; dropping the octa-(polyethylene glycol)-polyhedral oligomericsilsesquioxane into the primary mixed solution, stirring till dissolving, so as to obtain a secondary mixed solution; and volatilizing the solvent in the secondary mixed solution in a vacuum oven till obtaining a constant weight, so as to obtain the solid polymer electrolyte. The solid polymer electrolyte has high conductivity and good mechanical performance.

The invention discloses a preparation method and application of a modified polysiloxane-based solid electrolyte membrane (SPE). In the present invention, SPE is made of poly(methylhydrogensilane) (PMHS), cyanoimidazolium ionic liquid (IL-CN), allyl-terminated polyether (PEO), lithium salt and crosslinking agent. The preparation method of the present invention is as follows: 1, PMHS, PEO, IL-CN are fully mixed in anhydrous toluene, add chloroplatinic acid catalyst, react for an appropriate time at a certain temperature; 2, the product in step 1 is dissolved in anhydrous acetonitrile Mix an appropriate amount of lithium salt, cross-linking agent and catalyst into the mixture, pour the solution into a polytetrafluoroethylene mold after stirring well, heat and cross-link and solidify in a vacuum oven, and obtain an all-solid polymer electrolyte membrane. The obtained electrolyte has high electrical conductivity, wide electrochemical stability window and high stability, and can be used in lithium secondary batteries.

The invention provides a composite solid electrolyte, and can solve the problem that the interface of inorganic solid electrolyte and metallic lithium in a solid battery is unstable and low in contact. The composite solid electrolyte is an inorganic oxide electrolyte plate modified with a mixture electrolyte layer used for a surface, and the mixture electrolyte layer is a mixture of a polymer matrix, an alkali metal salt and a sulfide. The invention also provides a preparation method of the composite solid electrolyte, the composite solid electrolyte stable for the metallic lithium can be obtained, and the production cost is reduced.

The invention discloses an electrolyte membrane containing a zwitterionic all-solid polymer, a preparation method and application thereof. The all-solid polymer electrolyte of the present invention consists of poly(methylhydrogensilane), N,N-dimethylallylamine, allyl-terminated polyether, 1,3-propyl sultone, lithium salt and cross-linking agent. Fully mix PMHS, PEO, DMAA in toluene, add chloroplatinic acid catalyst to react; the prepared product is then reacted with 1,3-PS; the product of the above reaction is mixed with lithium salt and cross-linking agent in acetonitrile solvent, and fully stirred The film is cross-linked in a vacuum oven to obtain an all-solid-state polymer electrolyte membrane containing zwitterions. The conductivity of the all-solid polymer electrolyte containing zwitterions of the present invention is greatly improved, reaching 3.39×10-4S·cm-1 at room temperature, and the electrochemical window exceeds 5V, which can be used in lithium secondary batteries.

The invention discloses a composite electrolyte membrane and a preparation method and application thereof. The composite electrolyte membrane is a gel-state composite electrolyte membrane or a solid-state composite electrolyte membrane. The preparation method of the composite electrolyte membrane comprises the following steps of adding a macromolecular polymer material into an organic solvent, and performing stirring to obtain a macromolecular polymer material solution; and adding inertia inorganic solid filler and / or active inorganic solid filler, a lithium salt and an ionic liquid, and performing ultrasonic dispersion, stirring, standing and drying to obtain the composite electrolyte membrane. The composite electrolyte membrane has the advantages of high thermal stability, high electrochemical stability, good ionic conductivity, good interface adhesion tightness and the like, is easy to form and can be completely in contact with an electrode material; the preparation method has the advantages of simple process and the like, continuous production can be achieved; and the composite electrolyte membrane can be applied to a solid-state battery, and the solid-state battery shows relatively good cycle stability and rate performance.

The invention discloses a method for preparing a low-density and high-magnification epoxy resin microporous material, which is used to solve the problems of low expansion ratio and high foam density of the epoxy resin microporous material prepared by the existing epoxy resin microporous material preparation method question. The technical scheme is that the method takes bisphenol A type epoxy resin and hyperbranched epoxy resin as basic materials, and polyether amine and 3-glycidyloxypropyl trimethylsiloxane reactant as modifier, 2-ethyl-4-methylimidazole is used as a curing agent, mixed by solvent method, hot-pressed and cured, supercritical CO in an autoclave 2 The gas is saturated, followed by heating and foaming, and a low-density and high-expansion ratio epoxy resin microporous material with a uniform structure and a microporous structure is prepared.

The invention discloses a gel polymer electrolyte doped with modified particles, a preparation method and application thereof in an electrochromic device. The preparation method comprises the following steps of: (1) dissolving a polymer matrix and a lithium salt in a mixed solution of a plasticizer and a solvent, and continuously stirring at 45-55 DEG C, the polymer matrix being one of polyvinylidene fluoride-hexafluoropropylene, polymethyl methacrylate and polyvinylidene fluoride, (2) adding modified inorganic powder into the solution obtained in the step (1), and continuously stirring for 1-3 hours to form viscous sol, the addition amount of the modified inorganic powder being 3wt%-25wt% based on the total mass of the polymer matrix and the lithium salt being 100%, the modified inorganicpowder being silicon dioxide or titanium dioxide, and the surface being coated with a PMMA layer, and (3) pouring the sol obtained in the step (2) into a mold, and drying at 55-65 DEG C to obtain thegel polymer electrolyte doped with the modified particles.

The invention provides a metal pigment pretreatment method. The metal pigment pretreatment method comprises the following steps: metal pigment degreasing treatment: soaking the metal pigment into an alkaline aqueous solution to carry out degreasing treatment; acid treatment: soaking the degreased metal pigment into an acidic aqueous solution to carry out acid treatment, and eroding out nano-scale pits in the surface of the metal pigment by the acidic aqueous solution; pretreatment solution treatment: soaking the metal pigment subjected to the acid treatment into the pretreatment solution for treatment, so that the surface of the metal pigment has an amine treating agent, wherein the pretreatment solution is an aqueous solution of one or several of ammonia, hydrazine, a hydrazine derivative and water-soluble amine series compounds; and drying the metal pigment. The metal pigment pretreatment method has the advantages that the nano-scale pits are formed in the surface of the metal pigment; the pretreatment solution is adopted to treat the surface of the metal pigment with the nano-scale pits, so that the surfaces of the metal pigment nano-scale pits have the amine treating agent; and by virtue of the chemical reaction between reaction radials such as an epoxy group of a compatilizer, an ester group of PC and the like and amine, the resin is driven to enter the pits better.

The invention provides a preparation method of a polyurethane-based composite electrolyte membrane and a polyurethane-based composite electrolyte membrane. The preparation method of the polyurethane-based composite electrolyte membrane includes a mixing and dispersing step, a melt-blowing step and a hot roller pressing step. Mixing and dispersing step: mixing and dispersing the polyurethane-polysiloxane block copolymer and lithium salt and heating to obtain a lithium salt mixture; melt blowing step: using a melt blowing process to mix and interweave the lithium salt mixture and the reinforcing fibers at the same time, and then settle The composite fiber non-woven fabric is formed on the receiving device; the hot roller pressing step: the composite fiber non-woven fabric is heated and pressed to obtain a polyurethane-based composite electrolyte membrane.