942results about How to "Improve ionic conductivity" patented technology

The invention relates to the technical field of lithium iron phosphate production, and discloses a carbon-coated titanium-doped lithium iron phosphate positive electrode material and a preparation method thereof.The preparation method comprises the following steps that 1, a ferrous solution and a phosphorus source solution are mixed in proportion, dopamine hydrochloride is added, a pH regulator is dropwise added in the stirring state, the pH of the solution is adjusted to 4.0-5.5, a reaction is conducted, a titanium source solution is added, and a reaction solution is obtained; after uniformly stirring, continuously dropwise adding a pH regulator to regulate the pH value of the solution to 5.5-6.5; the iron phosphate octahydrate coated with the titanium-embedded polydopamine is obtained; 2) calcining the titanium-embedded polydopamine-coated ferrous phosphate octahydrate in an inert gas atmosphere to obtain carbon-coated titanium-doped anhydrous ferrous phosphate; 3) mixing the carbon-coated titanium-doped anhydrous ferrous phosphate with lithium phosphate and a carbon source, ball-milling, mixing, spray-drying and calcining to obtain a carbon-coated titanium-doped lithium iron phosphate positive electrode material; the synthesis process is simple, and energy consumption is reduced.

The invention belongs to the technical field of solid electrolyte materials, and particularly relates to a novel preparation method of a solid electrolyte with high ionic conductivity. The lithium source, the lanthanum source, the niobium source and the fluorine source are mixed, and the solid-phase dispersing agent is added in the mixing process, so that more uniform mixing is facilitated. According to the preparation method, precursor powder is obtained after mixing, then pure-phase LLNOF powder can be directly obtained through one-step sintering, the difficulty that in an existing reported preparation process scheme, a product obtained through two-step sintering has an impure phase is overcome, the preparation process is simple, and batch production and industrialization are facilitated.

The invention provides a double-layer polymer solid electrolyte, a preparation method thereof and a lithium ion battery, and belongs to the technical field of solid electrolyte manufacturing. The first polymer solid electrolyte layer comprises the following raw materials in parts by weight: 4-30 parts of a first reactive monomer A, 5-25 parts of a first reactive monomer B, a first cross-linking agent, a first photoinitiator, a first lithium salt, 1-20 parts of a first carbonic ester plasticizer and 20-45 parts of a nitrile plasticizer; the second polymer solid electrolyte layer comprises the following raw materials in parts by weight: 4-30 parts of a second reactive monomer A, 5-25 parts of a second reactive monomer B, a second cross-linking agent, a second photoinitiator, a second lithium salt, 1-35 parts of a second carbonic ester plasticizer and 10-35 parts of a fluorine-containing plasticizer; the double-layer polymer solid electrolyte has the advantages of relatively high ionic conductivity and compatibility of a high-voltage battery positive electrode and a low-voltage lithium metal negative electrode, so that the corresponding battery has relatively excellent cycle performance and relatively high capacity.

The invention relates to the technical field of solid-state batteries, in particular to a solid-state electrolyte composite membrane, a preparation method thereof and a solid-state battery. The preparation method comprises the following steps: performing ultrasonic-initiated cross-linking polymerization on a polymer solid electrolyte monomer, a cross-linking agent and a surface hydroxylated oxide solid electrolyte to obtain a polymer-oxide solid electrolyte matrix, washing the polymer-oxide solid electrolyte matrix, and soaking the polymer-oxide solid electrolyte matrix in an electrolyte to obtain the solid electrolyte composite membrane. According to the invention, crosslinking of the polymer electrolyte monomer is initiated by ultrasound, and chemical bonds are formed between part of the polymer electrolyte monomer and the surface-hydroxylated oxide solid electrolyte, so that the interfacial compatibility of the polymer electrolyte monomer and the surface-hydroxylated oxide solid electrolyte is effectively improved, and the ionic conductivity, chemical stability and mechanical strength of the polymer electrolyte are improved; due to the properties of easy processing, good flexibility and the like of the polymer electrolyte, the interface compatibility between the oxide solid electrolyte and the positive and negative pole pieces can be fully improved, the flexibility and the processability are improved, and a win-win effect is achieved.

The invention provides a secondary battery and a preparation method and device thereof, and the secondary battery comprises a positive pole piece, a negative pole piece, a solid electrolyte, a first modification layer and a second modification layer. One of the first modification layer and the second modification layer is located between the positive pole piece and the solid electrolyte, and the other one of the first modification layer and the second modification layer is located between the negative pole piece and the solid electrolyte; the first modification layer and / or the second modification layer comprises 20 wt%-60 wt% of polymer, 10 wt%-65 wt% of lithium salt and 2 wt%-45 wt% of inorganic particles. The thickness of the first modification layer and / or the second modification layer is relatively thin, easy to control and relatively good in uniformity, so that the interface resistance between the positive pole piece and / or the negative pole piece in the secondary battery and the solid electrolyte is remarkably reduced, the side reaction between the solid electrolyte and the positive pole piece and / or the negative pole piece is avoided, and the service life of the secondary battery is prolonged. And the first modification layer and / or the second modification layer have / has good thermal stability, so that the cycle performance of the secondary battery can be improved.

The invention discloses a porous substrate reinforced anion exchange membrane and a preparation method and application thereof, and relates to the technical field of anion exchange membranes. The porous substrate reinforced anion exchange membrane is prepared by the following steps: uniformly mixing a polyarylene alkylene type cationic polymer solution and a C1-C10 alcohol solvent, then coating two sides of a porous substrate with the mixture, and drying to obtain the porous substrate reinforced anion exchange membrane. And removing the solvent to obtain the product. According to the method, the porous substrate can be well infiltrated by the cationic polymer solution without pre-treating the porous substrate, so that the porous substrate reinforced anion exchange membrane with a sandwich-like structure is obtained. The film has outstanding swelling resistance and excellent mechanical properties, has good electrochemical properties, and has good application prospects in alkaline film energy conversion devices.

The invention belongs to the technical field of batteries, and particularly relates to a lithium ferrite lithium supplement agent and a preparation method and application thereof. Compared with the prior art, a solid electrolyte coating layer is formed on the surface of the carbon-doped lithium iron oxide material through a low-temperature molten salt method, so that air can be effectively isolated, the air stability of the material is improved, the lithium removal phenomenon is reduced, and the structural integrity and lithium supplement performance of the material are kept; and the lithium ferrite lithium supplement agent combines the high theoretical lithium supplement capacity of Li5FeO4 and the excellent ionic conductivity of the solid electrolyte, so that the electrochemical performance of the material can be improved while the high lithium supplement capacity is maintained, and a new technical scheme is provided for commercial application of the high-energy-density lithium ion battery.

The invention provides a high-performance all-solid-state sodium ion battery, and belongs to the technical field of power batteries, the sodium ion battery comprises a Prussian white positive electrode, a metal sodium negative electrode and an NASICON type solid electrolyte; preparation raw materials of the Prussian white positive electrode comprise Prussian white, the general formula of the Prussian white is NaxFe [Fe (CN) 6], and x is larger than or equal to 1.8 and smaller than 2.2; the composition of the NASICON type solid electrolyte is NaxZr2-yMySiuPvO12, x is more than 0 and less than or equal to 4, y is more than or equal to 0 and less than 2, u is more than 0 and v is less than 3; in the NaxZr2-yMySiuPvO12, M is at least one of a Zn element, a Mg element, a Cu element, an Al element, a Ni element, a Ga element, a Fe element and a K element. The sodium ion battery has excellent electrochemical performance at room temperature, is high in safety, and is beneficial to commercialized development and application of all-solid-state sodium ion batteries. The invention also provides a preparation method of the high-performance all-solid-state sodium ion battery.

The invention relates to a full-temperature-range polymer-based solid electrolyte, a solid-state battery and a preparation method. Mixing alkali metal salt, a polymer monomer and a plasticizer to obtain an electrolyte precursor; the polymer monomer comprises a fluorinated acrylate compound; the plasticizer comprises a fluorinated carboxylic ester compound, a fluorinated carbonic ester compound or a fluorinated amide compound; and adding an initiator into the electrolyte precursor, heating and polymerizing to obtain the polymer-based solid electrolyte with the polar functional group forming the dipole group, namely the full-temperature-range polymer-based solid electrolyte. A polymer monomer with a soft long side chain is used, and plasticizer molecules are anchored between polymer chains, so that leakage of the plasticizer molecules and parasitic reaction between the plasticizer molecules and an electrode are reduced, and the interface stability of the electrolyte in a high-temperature environment is improved; a polar functional group in the solid electrolyte has relatively high electronegativity, and the formed dipole interacts with alkali metal ions, so that the ions are quickly decoupled from a polymer matrix, and the low-temperature conductivity is favorably improved.

The invention relates to a polymer-based composite solid electrolyte, a preparation method and a sodium solid-state battery, and belongs to the technical field of solid-state batteries. The polymer-based composite solid electrolyte is prepared from the following components in parts by mass: 8 to 12 parts of alkene polymer, 4 to 8 parts of sodium salt and 1 to 8 parts of filler, and the filler is nitrided nano TiO2. The polymer-based composite solid electrolyte can be prepared in a simple and efficient mode, the ionic conductivity is high, the electrochemical stability window is wide, the ionic conductivity reaches 0.3-1.2 mS / cm, and the electrochemical stability window reaches 4.3-5.5 V; and meanwhile, the formation of good SEI can be promoted in the sodium solid-state battery, and the interface stability between the electrolyte and the electrode is improved.

The invention relates to the field of batteries, in particular to a negative plate and a battery comprising the negative plate. The negative plate comprises a negative current collector, a bottom coating and a negative active material layer, the bottom coating and the negative active material layer are positioned on one side or two sides of the negative current collector, the bottom coating is positioned between the negative current collector and the negative active material layer, the bottom coating comprises a three-dimensional structure formed by a first conductive binder, the first conductive binder comprises a first carbon nano tube, and the first carbon nano tube comprises a second carbon nano tube. The negative plate meets the following relational expression: 1.2 < = B / K < = 3.4, B is the length-diameter ratio of the first carbon nanotube, and K is the tensile strength of the negative current collector. According to the negative plate, the thickness of the priming coat can be greatly reduced, and the energy density of the battery is increased; the binding power between the negative electrode current collector and the negative electrode active material layer can be enhanced, the structural stability of the active material layer can be improved, the pole piece deformation and powder falling in pole piece processing and battery circulation can be improved, and the circulation expansion can be inhibited; the conductivity of the pole piece is improved and the fast charging performance of the battery is improved.

The invention discloses a composite solid electrolyte diaphragm which comprises a bacterial cellulose membrane, fluorinated metal modified PEO electrolyte particles and functional group modified particles, and the fluorinated metal modified PEO electrolyte particles and the functional group modified particles are loaded in a three-dimensional network structure of the bacterial cellulose membrane. The functional group modified particles are functional group modified silicon dioxide particles and functional group modified LATP particles, the functional group modified silicon dioxide particles uniformly wrap the functional group modified LATP particles, and fluorinated metal of the fluorinated metal modified PEO electrolyte particles is combined with functional groups of the functional group modified particles through coordinate bonds. The invention also discloses a preparation method of the electrolyte diaphragm and a battery with the electrolyte diaphragm. The ionic conductivity of the electrolyte diaphragm is improved.

The invention relates to the field of new energy batteries, in particular to an oxyhalide solid electrolyte composite material, a preparation method thereof and a battery, the oxyhalide solid electrolyte composite material comprises a core particle and a coating layer coating the surface of the core particle; wherein the inner core particle comprises LiaMObXc, the coating layer material comprises LiaMObXc-dFd, a is greater than or equal to 0.1 and less than or equal to 5w, and d is greater than or equal to 0.1 and less than or equal to 0.5 w; b < = 2, 2 < = c < = 6, 0lt; d < = 2; m is selected from at least one of Hf, Zr, Nb, Ta and Ti, and X is selected from at least one of Cl, Br and I. The oxyhalide solid electrolyte composite material disclosed by the invention is relatively low in fluorine content in a main body, so that the negative influence of over-low conductivity caused by high overall fluorine content of the material is reduced, and the electrolyte material is promoted to have excellent electrochemical oxidation potential and air stability while maintaining high ionic conductivity.

The invention relates to a silicon-carbon composite material, a preparation method thereof and a lithium ion battery. The preparation method comprises the following steps: adding porous carbon into a fluidized bed, heating and introducing alkaline mixed gas to obtain amino porous carbon; transferring the amino porous carbon into fluidized bed equipment, vacuumizing, heating, and introducing hydroxyl silane gas for nano silicon deposition; after deposition, introducing ultraviolet light for polymerization and oxidation to obtain a modified silicon-carbon precursor material; transferring the modified silicon-carbon precursor material into a tubular furnace, introducing inert gas to discharge air in the tube, and performing first carbonization to obtain a silicon-carbon material; and adding the resin into an organic solvent, adding the fast ion conductor and the silicon carbon material to be uniformly dispersed, performing spray drying, and performing secondary carbonization to obtain the fast ion conductor coated silicon carbon composite material. The preparation method provided by the invention is simple and efficient, and the prepared silicon-carbon composite material can improve the fast charging performance and is suitable for a negative electrode material of a high-energy-density lithium ion battery.

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

The invention belongs to the technical field of civil engineering materials, and provides an early-strength high-fluidity geopolymer grouting material and a preparation method thereof. The method comprises the following steps: firstly, carrying out heat treatment and chemical regulation on fly ash and granulated blast furnace slag to generate a pre-reaction phase with high reaction activity, and improving the alkali excitation reaction efficiency; then, by preparing a lubricating particle dispersion liquid and utilizing the synergistic effect of a silane coupling agent and interface lubricating particles, the uniform dispersity of the particles is enhanced; by adding the ionic liquid and the functionalized acylamino polymer, the dissolution and activation of the aluminosilicate are accelerated by utilizing the high polarity, the ion shielding effect and the dissolution enhancing performance of the ionic liquid; meanwhile, the amido polymer inhibits particle aggregation and stabilizes the particle dispersion state through the adsorption effect, the amido polymer and the amido polymer cooperate to form a lubricating layer in the slurry, reduce the viscosity of the slurry and improve the fluidity, and the early strength of the material is further improved by accelerating the generation of a gel phase.

The invention discloses a positive electrode material, the positive electrode material is a lithium-nickel-cobalt composite oxide, the positive electrode material comprises secondary particles, the secondary particles comprise a plurality of primary particles, the positive electrode material has a primary particle microcrystalline coefficient P, and the microcrystalline coefficient P is more than or equal to 20000 and less than or equal to 100000. According to the single crystal material provided by the invention, the number of microcrystals in the primary particles is increased, so that the ionic conductivity of the material is enhanced, and the problems of high impedance, low capacity and the like of large-particle single crystals are solved.

The invention provides a preparation method of an electron-ion mixed conductor sulfide electrolyte material, which is characterized by comprising the following steps: taking a sulfide solid electrolyte as an inner core, taking a two-dimensional transition metal layered material MXene as a surface coating layer, and coating the surface of the inner core with the two-dimensional transition metal layered material MXene, and carrying out ball milling and calcining to obtain the electron-ion mixed conductor sulfide electrolyte material. The two-dimensional transition metal layered material MXene is used as a surface coating layer, the air stability of the sulfide solid electrolyte is improved, calcination treatment is carried out, S in the sulfide solid electrolyte is combined with metal ions in MXene, the sulfide solid electrolyte has high electronic conductivity, the appearance of a space charge layer can be inhibited, and the performance of the sulfide solid electrolyte is improved. The electronic conductivity of the positive electrode is improved, the multiplying power of a battery cell is improved, the content of conductive carbon is reduced, and the intrinsic ion conductivity of sulfide electrolyte can be kept to the maximum extent.

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.

According to the anion exchange polymer, the anion exchange membrane, the method and the device provided by the invention, a cationic group with high alkali resistance is introduced into a polyaryl polymer structure, and meanwhile, a cationic side chain is introduced, so that the ionic conductivity and the alkali-resistant stability of the anion exchange polymer are synchronously improved; the anion exchange membrane prepared from the anion exchange polymer has the advantages of excellent ionic conductivity and alkali-resistant stability, can stably operate for a long time in a high pH value environment, and is not easy to degrade or reduce the performance. Therefore, the anion exchange membrane has remarkable advantages in electrochemical processes such as water electrolysis hydrogen production, so that the anion exchange membrane has a wide application prospect in electrochemical devices such as a water electrolysis reactor and the like.

The invention belongs to the technical field of lithium ion batteries, and particularly discloses a lithium ion battery positive electrode material, a preparation method thereof and a lithium ion battery. The lithium ion battery positive electrode material comprises a lithium-rich manganese-based positive electrode material and F-doped ferric cobaltate coating at least part of the surface of the lithium-rich manganese-based positive electrode material, the chemical formula of the F-doped ferric cobaltate is FeCo2O4-0. 5xFx, and x is larger than or equal to 0.01 and smaller than or equal to 0.06. According to the lithium ion battery positive electrode material, the lithium-rich manganese-based positive electrode material is coated with FeCo2O4-0. 5xFx, the structural stability of the lithium-rich manganese-based positive electrode material can be effectively improved, the FeCo2O4-0. 5xFx coating layer has a high Fermi level and excellent conductivity, and the ionic conductivity of the lithium-rich manganese-based material can be effectively improved.

The invention belongs to the technical field of solid-state lithium batteries, and particularly relates to a flame-retardant solid-state electrolyte as well as a preparation method and application thereof. The flame-retardant solid electrolyte is obtained by taking a first monomer with a polyhedral oligomeric silsesquioxane structure and a second monomer with an ethylene glycol dimethacrylate structure as polymeric monomers and performing in-situ polymerization on the polymeric monomers, a lithium salt as an active substance, a functional additive organic phosphorus flame retardant, a polymerization reaction initiator and an organic solvent. The flame-retardant solid electrolyte has an extremely strong electrolyte retention effect and good flame retardance, can take the electrochemical performance and the mechanical performance of the electrolyte into account, shows high cycling stability in a lithium metal battery, and is of great significance in development of a safe and high-performance solid-state battery.

The invention relates to a perfluoro wide-temperature electrolyte for a lithium battery and application thereof, the wide-temperature electrolyte comprises a lithium salt, an additive and a plurality of perfluoro mixed solvents, the electrolyte capable of stably working in a wide temperature range (-80-80 DEG C) is successfully constructed, and the excellent electrochemical performance of the lithium battery at the wide temperature is realized. The electrolyte additive disclosed by the invention mainly comprises one or more of hexafluoroisopropoxy cyclotriphosphazene, 3-(2, 2, 2-trifluoroethoxy) propionitrile, 3-(2, 2, 2-trifluoroethoxy) butyronitrile, 3, 4-fluoroethylene sulfate and 4-trifluoromethyl-ethylene sulfate, and the fluorine-containing additive is good in flame retardant effect, moderate in viscosity, good in system compatibility, good in corrosion resistance and good in corrosion resistance. And a protective film can be formed on the surface of the positive electrode of the lithium battery, so that the high-pressure and high-temperature cycle performance of the battery is improved, the electrochemical performance of the battery is not influenced at all, the self-extinguishing time of the electrolyte is obviously shortened, the flame retardant property and the conductivity are excellent, the overcharge resistance of the lithium ion battery is also obviously improved, and the safety performance of the battery is improved.

The invention discloses a flame-retardant semi-solid gel electrolyte and a preparation method thereof, and the flame-retardant semi-solid gel electrolyte comprises the following raw materials in parts by weight: 100-120 parts of PVDF resin, 25-30 parts of PPC resin, 5-10 parts of modified hollow ceramic fiber, 3-5 parts of modified nano aluminum hydroxide, 15-20 parts of an organic solvent, and 4-6 parts of a conductive agent. The modified hollow ceramic fiber is a Li0. 5La0. 5TiO3 hollow ceramic fiber subjected to surface grafting modification by 3-aminopropyltrimethoxysilane, the modified nano aluminum hydroxide is an antioxidant flame retardant grafted modified nano aluminum hydroxide, and the antioxidant flame retardant is a triazine derivative containing a hindered phenol structure and a DOPO (9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide) structure. According to the flame-retardant semi-solid gel electrolyte disclosed by the invention, the gel strength of the flame-retardant semi-solid gel electrolyte is improved, meanwhile, the ionic conductivity of the flame-retardant semi-solid gel electrolyte is improved, and the flame-retardant property and the thermal stability of the flame-retardant semi-solid gel electrolyte are improved by adding the modified nano aluminum hydroxide.

The invention relates to the technical field of batteries, in particular to a battery diaphragm, a preparation method thereof and a battery. The battery diaphragm comprises a base material layer and a dotted coating positioned on at least one side surface of the base material layer, the dotted coating comprises a non-fluorine composite material and a binding material; the non-fluorine composite material comprises aggregate of a plurality of unit materials, each unit material comprises a matrix and a coating layer located on the surface of the matrix, the matrix comprises a first polymer, and the coating layer comprises a second polymer; and the ratio eta of the thickness of the coating layer to the particle size of the unit material and the glass transition temperature Y of the second polymer meet the relational expression: Y = 100 eta-46. The battery diaphragm comprises the non-fluorine composite material and the binding material, the non-fluorine composite material is limited by satisfying the relationship, so that the adhesion difference between the diaphragm and an electrode plate at low temperature and high temperature is not large, and the whole performance of a battery cell is not greatly influenced after the battery cell preparation process is changed from hot pressing to cold pressing; and the cycling stability and the safety performance of the battery can be ensured.

The invention relates to a vertical orientation ceramic fiber / polymer composite solid electrolyte membrane and a preparation method and application thereof, the vertical orientation ceramic fiber / polymer composite solid electrolyte membrane is composed of an inorganic framework material with a vertical orientation structure and a toughening matrix material filled in the inorganic framework material, the inorganic framework material is an inorganic ceramic nanofiber with high lithium ion conductivity, the toughening matrix material is a polymer / lithium salt compound with relatively high lithium ion conductivity. The composite solid electrolyte membrane combines high modulus of an inorganic skeleton and high toughness of a polymer, has excellent mechanical properties, and can form good contact with a positive electrode and a negative electrode of a battery. More importantly, the unique vertical orientation fiber structure of the inorganic skeleton can greatly reduce the actual transmission path of ions in the operation process of the battery, and the ionic conductivity of the composite solid electrolyte membrane is greatly improved.

The invention relates to the field of new energy batteries, in particular to a sulfide solid electrolyte, a preparation method thereof and a battery, the preparation method comprises the following steps: S1, dissolving lithium sulfide and lithium halide in an anhydrous organic solvent to obtain a first material; drying the first material to obtain a first mixture; s2, mixing the first mixture with phosphorus sulfide to obtain a precursor; and S3, carrying out sintering treatment on the precursor. The preparation method of the sulfide solid electrolyte is simple and efficient in process and low in preparation cost, uniform mixing of high-melting-point raw materials can be achieved, then uniform mixing of precursors is achieved, and the solid electrolyte prepared through the method is free of impurity phases and high in batch stability.

The invention provides an oxychloride solid electrolyte as well as a preparation method and application thereof, and belongs to the technical field of all-solid-state lithium battery materials. The chemical general formula of the oxychloride solid electrolyte disclosed by the invention is xLi2O-(1-y) ZrCl4-yAlCl3, wherein 0 lt; x is less than or equal to 3, 0lt; y < = 1. Compared with other solid electrolytes such as sulfides, halides, oxides and the like (the Young modulus mostly exceeds 20 GPa and even is higher than 100 GPa), the oxygen chloride solid electrolyte has lower Young modulus (not higher than 4 GPa); the all-solid-state lithium battery assembled by using the oxychloride solid electrolyte disclosed by the invention has excellent surface capacity and long cycle stability.

The invention relates to a composite alkaline ionic membrane as well as a preparation method and application thereof. The composite alkaline ionic membrane is obtained by carrying out anion exchange on a composite membrane consisting of a quaternized anion exchange membrane type polymer and an ion solvated polymer nanofiber membrane, the quaternized anion exchange membrane type polymer is distributed on the surface and in pores of the ion solvated polymer nanofiber membrane, and the quaternized anion exchange membrane type polymer and the ion solvated polymer nanofiber membrane are combined through a covalent bond; the preparation method comprises the following steps: coating the surface of an ion solvated polymer nanofiber membrane with an anion exchange membrane type polymer solution, filling pores in the membrane with the anion exchange membrane type polymer solution, and then sequentially carrying out a cross-linking reaction, a quaternization reaction and an anion exchange reaction to prepare the composite alkaline ionic membrane; the alkaline ionic membrane is applied to alkaline electrolysis of water for hydrogen production, alkaline fuel cells, carbon dioxide conversion or electrochemical synthesis of ammonia. The composite alkaline ionic membrane disclosed by the invention has excellent ionic conductivity and mechanical strength; the preparation method is simple and feasible; the application range is wide.

The invention provides a solid electrolyte for a lithium battery and a preparation method and application thereof, and belongs to the technical field of solid electrolytes.The solid electrolyte is prepared from, by mass, 40-75 parts of lithium salt, 10-30 parts of cross-linking agent, 5-25 parts of nanoscale silicon borate glass fiber and 1-10 parts of photoinitiator. The lithium salt, the cross-linking agent, the nanoscale silicon borate glass fiber and the photoinitiator are adopted as raw materials, a polymer component formed after ultraviolet curing has high mechanical performance, a stable electrolyte-electrode interface can be formed, growth of lithium dendrites can be effectively inhibited, the risk of short circuit of the battery is reduced, and the service life of the battery is prolonged. Therefore, the overall safety of the battery is improved, and the service life of the battery is prolonged. As an inorganic filler, the nanoscale silicon borate glass fiber is beneficial to reducing the crystallinity of a polymer component and increasing an amorphous phase region, so that rapid migration of lithium ions is facilitated, and the ionic conductivity and coulombic efficiency of the battery are improved.