288results about "Composite electrolytes" patented technology

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 discloses a biosynthetic bacterial cellulose-based solid electrolyte as well as a preparation method and application thereof, and belongs to the technical field of solid electrolytes. The solid electrolyte is prepared by taking modified bacterial cellulose prepared by fermenting acetobacter xylinum, rhizobium, pseudomonas, azospirillum, alcaligenes and other bacteria as a substrate, introducing a low-molecular-weight polymer to regulate and control the arrangement of cellulose molecular chains to serve as a conductive ion framework, and then compounding a conductive ion high-molecular-weight polymer and a lithium salt. According to the invention, cellulose molecular chains are modified by modified glucose, and a network structure is regulated and controlled by a low-molecular-weight polymer, so that the problems of small spacing, lack of ion coordination sites and weak ion transmission capability of pure cellulose molecular chains are effectively solved, the ionic conductivity of the prepared solid electrolyte can reach 10 <-4 > S cm <-1 >, the electrochemical window width reaches 5V, and the solid electrolyte has a good application prospect. The material can tolerate high critical current density, is suitable for various positive electrode materials, and is suitable for high-voltage and long-cycle-life energy storage devices.

The invention discloses a composite sulfide solid-state electrolyte and a preparation method and application thereof, and relates to the technical field of solid-state batteries. The composite sulfide solid electrolyte comprises sulfide solid electrolyte particles and nano ion conductor particles which are stable to water vapor, wherein the nano ion conductor particles are uniformly distributed on the surfaces and gaps of the sulfide solid electrolyte particles to form a composite structure. Therefore, through the composite structure that the nano ion conductor particles are uniformly distributed on the surfaces of the sulfide particles and in the gaps, the surface coverage of the sulfide solid electrolyte can be increased, the hydrolysis reaction rate can be reduced, and the sulfide solid electrolyte is well protected while the reduction amplitude of the lithium ion conductivity is reduced; the stability to air is improved; and the electrochemical stability is also improved. In addition, the method is simple in process, has good mass production capacity, and has high application value for actual production.

The invention discloses a composite solid electrolyte and a preparation method and application thereof, and belongs to the technical field of solid lithium batteries. The composite solid electrolyte comprises a polymer matrix, a lithium salt and a lithium ion modified ionic metal organic framework (MOF) material. The metal center of the ion-conducting MOF material can be selected from Zr, Ti, Hf and the like, and the organic ligand can be selected from organic acids containing sulfydryl, sulfo groups and the like. The MOF material can effectively inhibit crystallization of a polymer matrix and increase the proportion of an amorphous region, Lewis acid sites on the surface of the MOF material can promote dissociation of lithium salt, and a lithium ion coordination channel formed in the MOF material can provide an extra rapid transmission path for lithium ions. When the electrolyte is applied to the solid-state lithium battery, the growth of lithium dendrites can be effectively inhibited, and the rate capability, the cycling stability and the safety of the battery can be remarkably improved.

The invention discloses a composite solid electrolyte layer, a preparation method and application, the composite solid electrolyte layer comprises a porous membrane laminated on a negative pole piece, and pores in the porous membrane and gaps between the porous membrane and the negative pole piece are filled with in-situ generated polymers. Inorganic solid electrolyte is also dispersed in the porous membrane, and lithium salt is dispersed in the polymer and the porous membrane. The composite solid electrolyte layer is obtained through in-situ polymerization of a polymer in pores in the porous membrane and gaps between the porous membrane and the negative electrode plate, and a novel interface structure with the electrode-electrolyte integration characteristic is constructed. By adopting a collaborative optimization strategy of a polymer matrix and inorganic filler double-crosslinking network system and an interface stable layer, the volume effect problem of a silicon-based negative electrode, the electrolyte interface impedance problem and the battery safety problem can be solved at the same time, so that the cycling stability and the rate capability of the lithium ion battery are remarkably improved.

The invention relates to a composite solid-state electrolyte membrane and a preparation method thereof, a lithium ion battery and an electric device, the composite solid-state electrolyte membrane comprises a lithium phosphorus oxygen nitrogen solid-state electrolyte, the general formula of the lithium phosphorus oxygen nitrogen solid-state electrolyte is LixPOyNz, x is greater than 2.7 and less than or equal to 3, zlt; 0.45, 3 < (y + z) < 4; along the thickness direction of the solid electrolyte membrane, the nitrogen doping ratio of the lithium-phosphorus-oxygen-nitrogen solid electrolyte in the composite solid electrolyte membrane is gradually increased, and the corresponding oxidation stoichiometric number is gradually reduced. According to the composite solid electrolyte membrane, the capacity retention ratio, the cycling stability and the safety of the lithium ion battery are improved.

The invention provides a solid-state electrolyte membrane based on a bicontinuous lithium-conducting network and a preparation method and application of the solid-state electrolyte membrane. The solid electrolyte membrane comprises a three-dimensional ceramic lithium-conducting network, and the three-dimensional ceramic lithium-conducting network is a three-dimensional continuous porous ceramic skeleton; pores of the three-dimensional ceramic lithium-conducting network are filled with the cross-linked polymer lithium-conducting network; the cross-linked polymer lithium-conducting network contains lithium salt and a plasticizer; wherein the three-dimensional ceramic lithium-conducting network and the cross-linked polymer lithium-conducting network form a space interpenetrating structure through physical interlocking and / or chemical bonding, and Li < + > migration paths of the three-dimensional ceramic lithium-conducting network and the cross-linked polymer lithium-conducting network are continuously communicated at least in the thickness direction. According to the high-strength solid-state electrolyte membrane based on the bicontinuous lithium conduction network, through the synergistic effect of the ceramic network and the polymer network, the cycle performance of a lithium battery is improved while the mechanical and electrochemical aspects are remarkably improved, and the high-strength solid-state electrolyte membrane is suitable for large-scale application of a high-energy-density solid-state battery.

The embodiment of the invention discloses a preparation method of a solid electrolyte membrane and the solid electrolyte membrane. The preparation method of the solid electrolyte membrane comprises the following steps: providing a composite fiber solution, a thermoplastic elastomer solution, a solid electrolyte matrix and a positive electrode material; performing coaxial electrostatic spinning treatment on the composite fiber solution and the thermoplastic elastomer solution to obtain a fiber adhesive; carrying out ball milling treatment on the fiber adhesive, the solid electrolyte matrix and the positive electrode material to obtain a fibration mixture; and carrying out hot rolling treatment on the fiberized mixture to obtain the solid electrolyte membrane. According to the preparation method provided by the invention, the fiber adhesive prepared from the composite fiber and the thermoplastic elastomer, the solid electrolyte matrix and the positive electrode material are subjected to ball milling and hot rolling treatment, so that the interface contact between the cathode and the electrolyte is optimized, the interface impedance is reduced, the cyclic stress is relieved, and the generation of interface cracks is inhibited; the prepared solid electrolyte membrane is high in ionic conductivity and stable in structure.

The invention provides a secondary battery and a manufacturing method thereof, a battery device, an energy storage device and a power utilization device, which are at least beneficial to improving the performance of the secondary battery. The manufacturing method comprises the steps that magnetic composite filler comprising an ionic conductor core is prepared, the surface of the ionic conductor core is sequentially coated with a magnetic functional layer and a protective layer, the magnetic functional layer is made of a magnetic material, and the protective layer is made of an oxide; preparing a polymerization precursor comprising the magnetic composite filler, a polymer matrix, an initiator, a lithium salt and a solvent; coating the polymeric precursor under a pulsed magnetic field to form a film, so that the magnetic composite filler is directionally arranged along the thickness direction of a film layer; initiating the polymerization precursor to generate polymerization reaction, so that the polymerization precursor is cured and molded into a solid electrolyte membrane; a positive plate and a negative plate are provided, the positive plate, the solid electrolyte membrane and the negative plate are subjected to winding treatment or lamination treatment and then put into the shell, and an initial battery cell is formed.

The invention discloses a preparation method of a poly (1, 3-dioxolame)-based composite electrolyte, and belongs to the technical field of sodium ion batteries. The preparation method comprises the following steps: adding a sodium salt and a 1, 3-dioxolame monomer into a solvent, then mixing with an additive to obtain a precursor, and carrying out standing and polymerization curing treatment to obtain the poly (1, 3-dioxolame)-based composite electrolyte. According to the invention, the polymerization curing time of the precursor is greatly shortened by optimizing a solvent system; the additive is introduced into the precursor, the additive comprises a cross-linking agent and / or an inorganic filler, the cross-linking agent is trimethylolpropane triglycidyl ether, and the inorganic filler is NASICON type solid electrolyte powder, so that the ionic conductivity of the poly (1, 3-dioxolame)-based composite electrolyte is effectively improved, and the service life of the poly (1, 3-dioxolame)-based composite electrolyte is prolonged. And the cycling stability and the first-cycle discharge specific capacity of the assembled battery are remarkably improved.

The invention relates to a composite solid electrolyte membrane with high ionic conductivity as well as a preparation method and application thereof. The composite solid electrolyte membrane comprises a porous matrix membrane, composite solid electrolytes and a copolymer, wherein the surfaces and pores of the porous matrix membrane are filled with the composite solid electrolytes, and the copolymer forms a cross-linked network among the composite solid electrolytes; the porous matrix membrane comprises a matrix material, a plasticizer, a first lithium salt and a fluorocarbon surfactant; the composite solid electrolyte is of a core-shell structure, an inner core is a solid electrolyte, and an outer shell is a metal organic framework with pores adsorbing ionic liquid; the ionic liquid is synthesized from imidazole ionic liquid and second lithium salt; the copolymer is formed by initiating in-situ polymerization of an organic matter monomer and a cross-linking agent through an initiator. The composite solid-state electrolyte membrane and the solid-state battery are prepared through in-situ polymerization, and the composite solid-state electrolyte membrane with high ionic conductivity can improve the electrochemical window of the solid-state battery, reduce the surface resistance and improve the cycle performance.

The invention discloses an electrolyte preparation method and a battery. The preparation method of the electrolyte comprises the following steps: adding a polymer and industrial solid waste into a solvent to form a mixed solution; preparing the mixed solution into a framework material; mixing a monomer, a lithium salt and an initiator to form a polymerization solution; and preparing the polymer solution and the framework material into the electrolyte. The method can realize high-value utilization of industrial solid wastes.

The invention discloses a preparation method and application of an iron-doped molybdenum disulfide / polymer-based composite solid-state electrolyte, and relates to the technical field of solid-state batteries. After the iron element is doped, defects are introduced into the structure of the modified molybdenum disulfide, phase change is induced, dissociation of the lithium salt is promoted through synergism of the modified molybdenum disulfide and the iron element, and more free lithium ions are released; and meanwhile, the proportion of an amorphous region of the polymer electrolyte is increased, so that the ionic conductivity is improved, and the oxidation resistance is enhanced. In addition, the iron-doped molybdenum disulfide can effectively catalyze decomposition of lithium salt anions, and construction of a uniform and stable solid electrolyte interface (SEI) layer on the surface of the electrode is facilitated. The all-solid-state lithium metal battery assembled based on the modified solid electrolyte shows excellent electrochemical performance.

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 composite solid electrolyte membrane, a preparation method thereof and a lithium ion solid-state battery, and belongs to the technical field of batteries. The composite solid electrolyte membrane comprises inorganic fibers, lithium salt and a polymer film-forming matrix. The inorganic fiber comprises a dielectric ceramic fiber and an inorganic ion conductive fiber which are formed by side-by-side electrostatic spinning. Under an external electric field, a built-in electric field can be generated between the dielectric ceramic fiber and the inorganic ion conductive fiber which are formed by side-by-side electrostatic spinning, a space charge layer between the organic polymer solid electrolyte and the inorganic ion conductive material in the composite solid electrolyte membrane can be weakened, and the lithium flux is optimized, so that dissociation of lithium ions is promoted; the composite solid electrolyte membrane can generate more lithium ions easy to move, so that the lithium ions in the lithium salt can spontaneously transfer to the inorganic ion conductive material in a cross-interface manner, thereby realizing high-efficiency transmission of the lithium ions and further improving the ionic conductivity of the composite solid electrolyte membrane.

The invention relates to the technical field of lithium batteries, in particular to a composite solid electrolyte membrane, a preparation method thereof and a lithium metal battery. The composite solid electrolyte membrane comprises a fiber porous matrix and a filling phase, the fiber porous matrix is of a three-dimensional porous structure formed by ordered arrangement and crosslinking of fiber matrixes, and pores of the fiber porous matrix are filled with the filling phase; a Hellman orientation factor fgt of the fibrous porous matrix; 0.5 part; the fiber matrix comprises a fiber material and a first functional additive, and the first functional additive is attached to the fiber material; the filling phase comprises a polymer material, a lithium salt and a plasticizer. According to the composite solid electrolyte membrane disclosed by the invention, the components and structures of the fiber porous matrix and the filling phase are optimized, so that the ordered fiber porous matrix and the filling phase can play a better synergistic effect; therefore, the composite solid electrolyte membrane has excellent performance in the aspects of high ionic conductivity, wide electrochemical window, long cycle life, high safety and the like.

The invention discloses a lithium-stable ultrathin flexible solid electrolyte film based on a high-dielectric oxide skeleton, and belongs to the technical field of solid electrolyte. The ultra-thin flexible solid electrolyte film comprises a framework, a dielectric layer and a flexible layer, wherein the framework is composed of a high-dielectric oxide; and the polymer electrolyte is formed by in-situ curing, covers the surface of the framework and is filled in the pores of the framework. Benefited from the high dielectric oxide skeleton, the ultrathin flexible solid electrolyte film has high stability to lithium, high ionic conductivity, high ionic transference number and long cycle life, and is very suitable for preparing a solid-state battery with high volume and / or high mass energy density.

The invention discloses a preparation method of a polyether block polyamide (PEBAX) fiber solid electrolyte membrane. The polyether block polyamide (PEBAX) fiber solid electrolyte membrane is formed by compounding polyether block polyamide fibers and solid electrolyte, the preparation method comprises the following steps: dispersing a solid electrolyte in a polyether block polyamide solution, preparing a polyether block polyamide-based solid electrolyte membrane by adopting an electrostatic spinning process, carrying out vacuum heat treatment, and rolling by a roller press to obtain the polyether block polyamide-based solid electrolyte membrane. The tensile strength, Young modulus, ionic conductivity and lithium ion transference number of the developed polyether block polyamide-based solid electrolyte membrane are improved, and the polyether block polyamide-based solid electrolyte membrane is expected to be applied to all-solid-state lithium ion batteries.

The invention provides a double-doped high-density garnet type solid-state electrolyte and a preparation method thereof, and belongs to the technical field of solid-state battery materials, the double-doped high-density garnet type solid-state electrolyte Li6. 4La3-yYbyZr1. 7W0. 3O12 co-doped with W and Yb is adopted, y is 0.05-0.2, the main phase of the double-doped high-density garnet type solid-state electrolyte is of a cubic phase garnet structure, and the main phase of the double-doped high-density garnet type solid-state electrolyte is of a cubic phase structure. A second phase is distributed on the grain boundary, the second phase is LiYbO2, the density reaches 98.1%, the ionic conductivity is 6.54 * 10 <-4 > S / cm, the activation energy is 0.419 eV through double-element synergistic doping to stabilize the cubic phase and regulate the grain boundary structure, the electrolyte is suitable for a high-safety all-solid-state lithium battery, and the problems of phase stability and interface impedance of a traditional LLZO-based electrolyte are solved.

The invention provides a composite solid electrolyte membrane, a preparation method thereof and a secondary battery. The composite solid-state electrolyte membrane comprises a modified pyrochlore type oxide solid-state electrolyte, a polymer matrix and a lithium salt, and the modified pyrochlore type oxide solid-state electrolyte comprises a pyrochlore type oxide solid-state electrolyte and a polymer coating layer coating the surface of the pyrochlore type oxide solid-state electrolyte. The polymer coating layer and the pyrochlore type oxide solid electrolyte are connected through a covalent bond, the polymer coating layer is formed by in-situ polymerization of a polymer monomer on the surface of the pyrochlore type oxide solid electrolyte, and the polymer monomer is selected from a monomer with a trifluoroacetamide functional group and / or a monomer with a carbamate functional group. The composite solid electrolyte membrane provided by the invention has excellent lithium ion conductivity.

The present application relates to an organic-inorganic composite solid electrolyte and a preparation method thereof, which is prepared by compounding an oxide solid electrolyte, an unsaturated polymer crosslinked in situ on the surface of the oxide solid electrolyte, and a polar organic solvent, so as to prepare an organic-inorganic composite solid electrolyte with higher room-temperature ionic conductivity and a wider electrochemical window. The composite solid electrolyte prepared by the present application has a room-temperature ionic conductivity of 0.1 mS / cm or higher, an electrochemical window of greater than 4.5 V, and an alkali metal cation transference number of greater than 0.9. In addition, the composite solid electrolyte is easy to be formed into a film, and the composite solid electrolyte film prepared has a thin thickness. A solid-state alkali metal battery assembled with the electrolyte film has good interface stability with the positive and negative electrodes, and can inhibit the growth of alkali metal dendrites, thereby significantly improving the performance of the battery.

To provide a solid electrolyte for an anode-free metal battery cell.SOLUTION: The present invention relates to a solid-state electrolyte (SSE) for an anode-free metal battery cell, wherein the metal is an alkali metal, an alkaline earth metal or a metal of group Ib, IIb or IIIa of the periodic table, the SSE comprising a non-aqueous solvent, a metal salt of an alkali metal, an alkaline earth metal or a metal of group Ib, IIb or IIIa of the periodic table, an aluminum-based halogenated compound AlXn, and a bis (fluorosulfonyl) imide anion, wherein X is a halogen atom and n is from 1 to 6. The invention further relates to a method of making such an SSE, the method comprising preparing a liquid precursor and exposing the liquid precursor to a temperature between 20 °C and 80 °C to solidify the liquid precursor, thereby obtaining a solid electrolyte.SELECTED DRAWING: Figure 1

According to the solid-state battery and the preparation method of the composite solid-state electrolyte of the solid-state battery, the surface of an electrolyte membrane is covered with a layer of first composite material, Li2O-B2O3 is stable to high voltage, B2O3 can effectively'capture 'or'fix' active hydrogen generated by decomposition of LiBH4 and prevent the active hydrogen from damaging an interface of a positive plate, a LiBH4 derivative phase is soft in texture, and the composite solid-state electrolyte of the solid-state battery can be used for a lithium ion battery. LiBH4 is added into the solid electrolyte, so that gaps between positive electrode particles and the solid electrolyte can be filled, the interface impedance is greatly reduced, and LiBH4 has high ionic conductivity and can maintain relatively good lithium conductivity; a layer of second composite material covers the surface of the composite solid electrolyte, and Li4PS4 provides high conductivity, has a very wide electrochemical stable window, can be directly and stably contacted with a high-voltage positive electrode, effectively inhibits release of positive electrode active oxygen and interface side reaction, and can effectively block diffusion of transition metal ions in the positive electrode to the electrolyte side; and moreover, the two layers of composite materials are used as bridging layers by introducing Li2S, so that the firm connection of the two composite layers is realized, and the impedance is reduced.

The invention provides a composite solid electrolyte, an all-solid-state positive pole piece and a preparation method and application thereof, the composite solid electrolyte is characterized by comprising a plurality of composite solid electrolyte particles, and each composite solid electrolyte particle at least comprises a conductive agent, an all-solid-state positive pole piece and an all-solid-state positive pole piece, and the solid electrolyte partially or completely wraps the conductive agent, and a network structure is formed between the conductive agent and the solid electrolyte. According to the composite solid electrolyte, the all-solid-state positive pole piece and the preparation method and application of the all-solid-state positive pole piece, a three-dimensional continuous conductive network can be constructed, and the electron and ion conduction efficiency can be improved, so that the rate capability and the cycle performance of an all-solid-state battery can be improved.

The invention discloses a metal oxide modified fiber material as well as a preparation method and application thereof. The preparation method comprises the following steps: stirring and dissolving tetraethoxysilane, tungsten chloride, ethanol and hydrochloric acid to form a uniform solution; mixing and dissolving polyvinylpyrrolidone, N, N-dimethylformamide and dimethyl sulfoxide to form another solution; mixing the solutions to prepare a spinning solution, and performing electrostatic spinning to obtain fibers; and dissolving a polyvinylidene fluoride-hexafluoropropylene copolymer and lithium bis (fluorosulfonyl) imide in N-methyl pyrrolidone to form a homogeneous solution, adding the fibers, stirring and mixing, casting to form a film, blade-coating the film to a predetermined thickness, and performing vacuum drying to obtain the target composite electrolyte. The method comprises the following steps: preparing a silicon dioxide nanofiber loaded tungsten oxide nanowire with a high length-diameter ratio through electrostatic spinning, and compounding the silicon dioxide nanofiber loaded tungsten oxide nanowire with a polyvinylidene fluoride-hexafluoropropylene copolymer matrix. The method is simple, convenient, efficient and low in cost, the prepared solid electrolyte is high in stability, the long cycle performance of the battery is remarkably improved, and an important basis is provided for optimizing polyvinylidene fluoride-hexafluoropropylene copolymer based electrolyte and developing a high-performance all-solid-state lithium ion battery.

The invention relates to the technical field of energy storage, in particular to a gel electrolyte, a preparation method thereof and a battery. The gel electrolyte comprises a porous skeleton structure and lithium salt arranged in gaps of the porous skeleton structure, the porous skeleton structure comprises a skeleton material, a cross-linking group and a chemical bond; wherein the framework material and the cross-linking group are covalently cross-linked through a chemical bond; the framework material comprises cellulose and lignin; the cross-linking group comprises at least one of an aldehyde group, an epoxy group and a hydroxyl group; the chemical bond comprises at least one of an ether bond and an ester bond. The gel electrolyte provided by the invention has significantly improved ionic conductivity and mechanical properties.

The present invention relates to the technical field of lithium metal batteries, in particular to a solid electrolyte composite material and its application in lithium batteries. The solid electrolyte composite material comprises a compound containing a multiamide group structure as shown in the following formula, and a sulfide solid electrolyte material; NH2-R-NH-[-OC-R-CO-NH-R-NH-] n The present invention uses the compound of formula (1) as a lithium negative electrode protective additive and compounds it with a sulfide solid electrolyte material to obtain a solid electrolyte composite material with a protective function for the lithium negative electrode.

The application discloses a nanofiber and piezoelectric polymer composite solid-state electrolyte membrane and a preparation method and a secondary battery thereof, relates to the technical field of batteries, and the raw materials of the solid-state electrolyte membrane include nanofibers and a piezoelectric polymer, the raw materials of the piezoelectric polymer include a piezoelectric polymer, a zinc salt and an ionic liquid; the nanofibers are used in the form of a nanofiber membrane as a framework, and the piezoelectric polymer is arranged on the nanofiber membrane. The preparation method comprises the following steps: preparing a spinning liquid by using a polymer material, performing spinning treatment, and obtaining a nanofiber membrane; dissolving the piezoelectric polymer, the zinc salt and the ionic liquid, uniformly laying the piezoelectric polymer, the zinc salt and the ionic liquid on the nanofiber membrane, and drying, and the solid-state electrolyte membrane is obtained. The secondary battery comprises the solid-state electrolyte membrane. The nanofiber reinforced solid-state electrolyte membrane realizes uniform distribution of current and electric field, provides ideal conditions for zinc deposition, the piezoelectric polymer is injected as an ion transmission medium, the zinc salt and the ionic liquid are introduced, and the ionic conductivity is improved.

The invention discloses a solid-state electrolyte precursor, a solid-state electrolyte and a solid-state lithium battery, and relates to the technical field of solid-state electrolytes. The solid electrolyte precursor is processed to form a solid electrolyte containing a thiourea structural unit, and the thiourea structural unit contains an N-H group capable of participating in hydrogen bond formation; and the ionic conductivity of the solid electrolyte at 25 DEG C is not less than 1.6 * 10 <-4 > S.cm <-1 >. According to the solid electrolyte formed by the solid electrolyte precursor, the solid electrolyte comprises a thiourea structural unit, a polymer network structure with the modified inorganic filler as a connection point is formed, the interfacial compatibility of an inorganic material and an organic material in the solid electrolyte is improved, a continuous conductive path is formed in the solid electrolyte, and the conductivity of the solid electrolyte is improved. Therefore, the ionic conductivity of the solid electrolyte is improved.

The invention discloses a solid electrolyte composite material as well as a preparation method and application thereof. The solid electrolyte composite material comprises an oxide solid electrolyte with a porous structure and an electron conduction material, wherein the electron conduction material comprises granular thermal decomposition carbon and reduced graphene oxide; wherein the electron conduction material is distributed in pores of the oxide solid electrolyte, and / or, at least part of the electron conduction material is embedded in the oxide solid electrolyte, and / or, the electron conduction material is distributed on part of the surface of the oxide solid electrolyte. High-conductivity reduced graphene oxide is obtained through heat treatment reduction, the material has the effect of conducting lithium ions and electrons at the same time, the porous oxide solid electrolyte material with the high specific surface can increase the contact area and increase a conduction path for ion migration, and the electrode reaction kinetics is effectively accelerated through the combined action of the two materials; and meanwhile, good rate capability and low-temperature performance are realized.