150 results about "Titanium phosphate" patented technology

The invention discloses a modification method of a lithium iron phosphate positive electrode material, which comprises the following steps: (1) mixing lithium iron phosphate with a mixed solution of isopropanol and deionized water, and stirring to obtain a solution I; (2) dissolving a lithium-containing compound, a titanium-containing compound and a phosphorus-containing compound in isopropanol to obtain a solution II; (3) slowly dropwise adding the solution II into the solution I, continuously stirring for 3 hours, and then carrying out spray drying to obtain powder; and (4) finally, carrying out heat treatment on the powder material to obtain the lithium iron phosphate coated with lithium titanium phosphate on the surface. According to the invention, the surface of the lithium iron phosphate is coated with a layer of lithium titanium phosphate through a wet coating method, so that the contradiction problem between the compaction density and the electric capacity exertion of the lithium iron phosphate is solved, the compaction density of the lithium iron phosphate is not influenced, the electric capacity exertion is remarkably improved, and the comprehensive performance of the lithium iron phosphate is improved.

The invention provides a method for recovering valuable metals from sulfuric acid process titanium white waste acid through steel slag treatment. The method comprises the following steps: recovering to obtain ferrous sulfate heptahydrate crystals; s2, recovering Sc metal, and extracting the filtrate in the step S1 to obtain a first loaded organic phase and a first raffinate; the first loaded organic phase is washed with alkali liquor, and a second loaded organic phase and washing water are obtained through reverse extraction; treating the washing water to obtain titanium phosphate; back-extracting the second loaded organic phase by using alkali liquor, carrying out filter pressing to obtain crude Sc (OH) 3, and refining to obtain scandium oxide; extracting the first raffinate to obtain a third loaded organic phase and a second raffinate, pickling the third loaded organic phase, reversely extracting with ammonia water, adding phosphoric acid for reaction, and treating to obtain titanium phosphate; and steel slag is added into the second raffinate for neutralization leaching and hydrolysis vanadium precipitation, vanadium-rich slag is obtained through filtering, and then the vanadium electrolyte is prepared. According to the method, iron is separated through crystallization, scandium and titanium are separated through extraction, vanadium-rich slag is separated through neutralization and precipitation, and efficient utilization of resources is achieved.

According to one embodiment of the present invention, a lithium secondary battery is provided, the battery comprising: a cathode including a cathode current collector, and a cathode active material layer formed on one surface or both surfaces of the cathode current collector; an anode including an anode current collector, and an anode active material layer formed on one surface or both surfaces of the anode current collector; and a separator including a substrate, and an oxide-based solid electrolyte layer which is formed on one surface or both surfaces of the substrate and which includes lithium aluminum titanium phosphate (LATP), wherein the anode active material layer and the oxide-based solid electrolyte coating layer face each other, an inorganic layer including a reduced product of the LATP and an SEI material is formed at the interface between the oxide-based solid electrolyte layer and the anode active material layer, and the amount of F in the inorganic layer is 7-15 atom% on the basis of the total amount of atoms present in the inorganic layer.

The invention belongs to the technical field of energy storage batteries and electrochemistry, and discloses a green preparation method and application of a carbon-coated sodium titanium phosphate composite material, titanyl sulfate and sodium dihydrogen phosphate are only used as raw materials, a simple coprecipitation method is used for preparing a precursor, the precursor and sodium dihydrogen phosphate are mixed and roasted, and sodium titanium phosphate can be obtained. Hydrothermal treatment is not needed, and harsh preparation conditions of high temperature and high pressure are avoided; meanwhile, ammonia-containing substances and acid do not need to be used, so that the ammonia-containing substances and the acid are prevented from being transported, stored, used, discharged and treated; the used raw materials are all solid materials and are not easy to volatilize or leak, so that the safety risk and loss in the transportation process are reduced. The titanyl sulfate used in the invention belongs to an intermediate for preparing titanium dioxide, is rich in source and low in price, and is suitable for industrial preparation. The carbon-coated sodium titanium phosphate prepared by the invention is used as a negative electrode of a sodium-ion battery, and has the material characteristic of high phase purity and the electrochemical characteristics of excellent specific capacity, rate, long cycle and the like.

The invention discloses a high-temperature-resistant polyurethane elastomer and a preparation method thereof, and relates to the technical field of polymer materials, the high-temperature-resistant polyurethane elastomer comprises the following specific components: polyether polyol, poly (toluene diisocynate) pMD I, a chain extender and a cross-linking agent; the high-temperature-resistant polyurethane elastomer further comprises additives, wherein the additives specifically comprise nano aluminum silicate fibers, a titanium phosphate-based temperature-resistant synergist, a multi-walled carbon nanotube grafted amide group and a metal organic framework composite material. According to the high-temperature-resistant polyurethane elastomer and the preparation method thereof, multiple additives and nano aluminum silicate fibers are introduced into the polyurethane elastomer, so that the thermal isolation property of the material is effectively improved; the multi-walled carbon nanotube grafted amide group improves the thermal conductivity, and solves the problem of poor dispersibility of the carbon nanotube in a polyurethane matrix; the thermal stability of the material is further improved by the titanium phosphate-based temperature-resistant synergist; the introduction of the metal organic framework composite material significantly improves the gas isolation and thermal stability of the material.

The invention discloses an anti-alkali metal poisoning SCR (Selective Catalytic Reduction) catalyst and a preparation method and application thereof, and belongs to the field of catalysts for atmospheric governance, the SCR catalyst comprises the following components in percentage by mass: 80%-90% of TiO2, 0.5%-1.5% of V2O5, 3%-5% of WO3 and 3%-10% of a cocatalyst; the cocatalyst comprises one or two of zirconium phosphate and titanium phosphate. The SCR catalyst provided by the invention is high in targeting property and remarkable in alkali metal poisoning resisting effect. TiO2 is used as a main carrier, V2O5 provides a main catalyst active component, WO3 can improve the thermal stability and acidity of the catalyst, a cocatalyst loses activity after capturing alkali metal, and an effective chemical barrier is constructed by sacrificing the cocatalyst; the path that alkali metal ions continue to diffuse into the coating and react with key V-OH acidic sites is blocked, and the alkali poisoning resistance is qualitatively improved, so that the denitration activity of the catalyst is preserved.

The invention relates to the field of lithium ion battery positive electrode materials, and discloses a lithium iron phosphate positive electrode material and a preparation method and application thereof. The positive electrode material comprises a matrix and a carbon coating layer coating the surface of the matrix, and based on the total weight of the positive electrode material, the content of the matrix is 94.5-98.9 wt%, and the content of the carbon coating layer is 1.1-5.5 wt%; wherein the matrix is composed of lithium iron titanium phosphate and lithium iron titanium phosphate; the phase composition of the positive electrode material is xLiFe (1-a) TiaPO4. (1-x) LiTi (2-b) Feb (PO4) 3 (at) C, wherein a is more than 0.01 and less than 0.03, b is more than 0.1 and less than 0.3, and x is more than 0.94 and less than 1. The lithium iron phosphate positive electrode material provided by the invention has excellent rate capability, and effectively solves the problem of low energy efficiency of lithium iron phosphate in the prior art.

The method for controlling titanium doping in the iron phosphate synthesis process comprises the following steps that S1, a phosphorus source, an iron source, a titanium source and water are mixed and dissolved, and molten metal is prepared; s2, respectively preparing titanium phosphate seed crystal slurry and iron phosphate seed crystal slurry; s3, the iron phosphate seed crystal slurry and the titanium phosphate seed crystal slurry are added into the molten metal for a heating reaction, and titanium-doped iron phosphate slurry is obtained; in the molten metal, the concentration of the iron element is 60-70 g / L, the molar ratio of the iron element to the phosphorus element is (0.98-1): 1, and the mass ratio of the iron element to the titanium element is (95-100): 1. By controlling the concentration of Fe and Ti in molten metal and adding seed crystals, the precipitation rate of Fe and Ti in the synthesis process is regulated and controlled, so that titanium doping is accurately realized, and iron phosphate products with multiple series of titanium contents can be synthesized.

The invention discloses a multi-layer continuously coated mixed electrode material sodium-ion battery and a preparation method thereof, a positive electrode adopts a layered oxide material continuously coated by multi-layer carbon-phosphoric acid ferric sodium pyrophosphate, a carbon-based dispersant adopted in the coating process has the effect of dispersing slurry and also has the effect of coating a carbon source, and wet-process mixed coating is adopted, so that the coating efficiency is greatly improved, and the service life of the battery is prolonged. And the continuity and the uniformity of the coating layer are ensured. The negative electrode adopts a carbon-coated sodium titanium phosphate material, a carbon-based dispersant is still adopted as a carbon source in the coating process, and a secondary sintering method is adopted, so that the obtained negative electrode material is purer in phase, more stable in structure and better in carbon coating effect. And finally, the prepared positive electrode material, the prepared negative electrode material and a non-aqueous electrolyte are assembled into a battery for testing, and a test result shows that the specific capacity of the battery adopting the layered oxide material continuously coated with the multi-layer carbon-phosphoric acid ferric sodium pyrophosphate as the positive electrode is not influenced, and the cycle performance is better.

The present invention discloses a method for synthesizing a solid electrolyte material. The method comprises: low-temperature oxidation of a LATP precursor; short-term high-temperature sintering of the precursor in a protective atmosphere; low-temperature oxidation removal; and dynamic high-temperature sintering for carbon removal. The solid electrolyte nano-lithium aluminum titanium phosphate (LATP) material produced by the present method exhibits high ionic conductivity. Lithium-ion batteries prepared from this material exhibit low low-temperature DCR, high capacity utilization, and excellent cycling performance.

The invention provides an asymmetric solid electrolyte membrane and a preparation method thereof and application of the asymmetric solid electrolyte membrane in a battery, the asymmetric solid electrolyte membrane comprises a base membrane, a first coating and a second coating, the base membrane is provided with a first surface and a second surface, the second surface is opposite to the first surface, and the second surface is opposite to the first surface. The first coating is formed on the first surface of the base film and contains lithium titanium aluminum phosphate, and the second coating is formed on the second surface of the base film and contains a solid electrolyte material except the lithium titanium aluminum phosphate. In the invention, the solid electrolyte which is stable to the negative electrode is selected for coating, so that the problem that the performance of the negative electrode is degraded by LATP is solved, the overall performance of the diaphragm is improved, and the coating process is adaptive to an existing production line and does not need to be greatly modified.

The invention discloses a preparation method of a self-repairing LATP composite solid electrolyte membrane, which comprises the following steps: S1, hydroxylating titanium aluminum lithium phosphate nanoparticles, and coating with an isocyanate polyurethane prepolymer to obtain porous PU-LATP particles; s2, carrying out copolymerization on adamantanediol diacrylate, acrylate and furfuryl acrylate, and then carrying out a Diels-Alder reaction with bismaleimide so as to form a reversible cross-linked precursor solution; and S3, mixing the PU-LATP particles with the precursor, a lithium salt and an auxiliary agent, carrying out vacuum defoaming, and drying to obtain the self-repairing LATP composite solid electrolyte membrane. According to the preparation method disclosed by the invention, the solid electrolyte membrane is endowed with the capability of quickly self-repairing microcracks at room temperature, and high ionic conductivity and a wide electrochemical window are considered at the same time; the mechanical strength is obviously improved, the thermal dimensional stability is excellent, and the strict requirements of the solid-state lithium battery on high safety and long cycle life can be met.

The invention discloses a preparation method of a lithium aluminum titanium phosphate solid electrolyte nano powder material, which comprises the following steps: S1, weighing a lithium source, an aluminum source, a titanium source and a phosphorus source, and preparing a sol precursor; s2, performing microwave treatment to obtain a gelatinous intermediate; s3, carrying out annealing treatment after grinding to obtain nano titanium aluminum lithium phosphate powder; s4, placing the substrate in a plasma enhanced atomic layer deposition reaction cavity, vacuumizing, and introducing plasma activation gas; alternately pulse trimethylaluminum and titanium tetrachloride precursors, and depositing to obtain a gradient oxide intermediate layer; s5, introducing oxygen plasma to oxidize the residual precursor to form a gradient oxide coating layer; and S6, carrying out annealing treatment to obtain the lithium titanium aluminum phosphate solid electrolyte nano-powder material. According to the preparation method disclosed by the invention, the side reaction of the LATP powder and lithium metal is effectively inhibited, the interface stability and the ionic conductivity are improved, and the high-performance requirement of an all-solid-state lithium ion battery on a solid electrolyte material can be met.

The invention relates to the technical field of positive electrode material precursors, in particular to a method for preparing battery-grade iron phosphate by taking titanium dioxide waste acid as a raw material and application of the battery-grade iron phosphate. Hydrolysis waste acid in the titanium dioxide industry is selected as the raw material, ammonia gas is used as a pH regulator, and phosphorus salt and hydrogen peroxide are used as precipitants; the solubility product constants of aluminum phosphate and titanium phosphate are small, Al < 3 + > and Ti < 4 + > in the hydrolysis waste acid are precipitated by adopting soluble phosphate and then are filtered and removed, iron ammonium phosphate is precipitated by virtue of phosphorus salt and is fully washed, and the content of metal impurity ions can be reduced to be less than 100ppm; according to the method, ferrous sulfate is subjected to fractional precipitation, impurity removal, precipitation, washing and aging under different pH conditions, so that the use amount of alkaline substances is greatly reduced, and the problems of high liquid waste treatment cost and resource waste in the traditional titanium dioxide industry are solved.

The invention belongs to the technical field of batteries, and particularly relates to a lithium titanium aluminum phosphate solid-state electrolyte and a preparation method and application thereof, and the chemical formula of the lithium titanium aluminum phosphate solid-state electrolyte is Li < 1 + x > Al < x > Ti < 2-x-y > M < y > (PO4) 3, the lithium aluminum titanium phosphate solid electrolyte is prepared from the following raw materials: a lithium source, a titanium source, a phosphorus source, an aluminum source, an M source and an auxiliary agent, wherein the auxiliary agent is used for promoting the lithium source, the titanium source and part of the phosphorus source to react to form an intermediate product. As the intermediate phase LiTiOPO4 cooperates with M source doping and substitution, Ti < 4 + > can be inhibited from being reduced into Ti < 3 + >, lattice collapse caused by titanium valence change in electrochemical circulation is avoided, and the ionic conductivity is improved; as the LiTiOPO4 intermediate phase is used for synthesizing the titanium aluminum lithium phosphate, the use amount of single phosphoric acid in the secondary sintering process can be reduced, the high-temperature liquid phase reaction is avoided, and the sintered finished product has the advantages of fluffiness and no sagger bonding; in the synthesis and sintering process of the lithium titanium aluminum phosphate, the LiTiOPO4 intermediate phase tends to form a continuous second phase network at the grain boundary of the LiTiOPO4 intermediate phase, so that the grain boundary impedance of the lithium titanium aluminum phosphate can be reduced.

The present invention discloses a lithium aluminum titanium phosphate composite polymer, a preparation method thereof and an application thereof, belonging to the technical field of lithium ion batteries. The preparation steps of the lithium aluminum titanium phosphate composite polymer include: in an inert atmosphere, dissolving a polymer monomer and a lithium salt in an organic solvent, then adding lithium aluminum titanium phosphate modified by a silane coupling agent, and after the reaction, adding a crosslinking agent to crosslink and polymerize the polymer monomer and the lithium aluminum titanium phosphate modified by the silane coupling agent, and obtaining the lithium aluminum titanium phosphate composite polymer after curing. The present invention utilizes the reactive sites dispersed in the polymer chain to react with the surface groups of the LATP modified by the silane coupling agent, so that the modified LATP particles are uniformly dispersed along the polymer chain. A chemical bond connection is formed between the LATP and the polymer, improving the discontinuous conduction of lithium ions caused by the organic-inorganic interface of the traditional composite electrolyte. The introduction of LATP endows the electrolyte with good mechanical properties and thermal stability.

The invention provides a method for synthesizing a carbon-coated sodium titanium phosphate cathode active material and an aqueous lithium battery cathode material by a solid phase method. The method comprises the following steps: mixing a sodium source, a titanium source and a phosphorus source in an organic solution, drying to obtain precursor powder, and sintering to obtain a carbon-coated sodium titanium phosphate material; and adding a sugar source into the carbon-coated sodium titanium phosphate material, uniformly mixing, calcining to obtain a carbon-coated sodium titanium phosphate negative electrode active material, and mixing the carbon-coated sodium titanium phosphate negative electrode active material with a binder conductive agent to obtain the aqueous lithium battery negative electrode material. According to the preparation method, by controlling the sintering process and designing and optimizing the raw materials, generation of impure phases is inhibited, meanwhile, good carbon coating is achieved, the conductivity of the material is improved, and by introducing the binder with high ionic conductivity, the capacity and the cycle retention rate of the NTP negative electrode are improved.

The invention discloses a high-density solution titanium alloy product screening method, and belongs to the technical field of titanium alloy product screening. The method is based on the density difference sorting principle, batch screening is achieved through two times of screening, in the first time of screening, to-be-screened titanium alloy particles are added into a high-density base solution (composed of phosphoric acid, sodium phosphate and sodium carbonate) with the density being 1.65 g / cm < 3 >, and particles which sink to the bottom and are too large in density are removed; in the second screening, floating or suspending particles in the first screening are added into a solution with the density adjusted to be 1.48 g / cm < 3 >, and the particles which sink to the bottom or suspend are qualified products. The transparent characteristic of the high-density solution is utilized, observation is facilitated, one-by-one operation is not needed, large-scale screening can be achieved, efficiency is improved, labor intensity is reduced, large-scale production is adapted, the residual solution is removed through the stepped cleaning step after screening, a titanium phosphate film formed on the surface of the titanium alloy is protected, and product stability is ensured.

The application discloses a kind of nano tin oxide and lithium titanium aluminum phosphate double-coated high-pressure-resistant lithium cobaltate positive electrode material and preparation method thereof.The positive electrode material is lithium cobaltate as matrix and is coated with ion conductor material lithium titanium aluminum phosphate and nano tin oxide on its surface;Nano tin oxide coating can inhibit the interface side reaction of lithium cobaltate positive electrode and electrolyte, and doped into the lattice vibration of body pegging layered structure, prevent the irreversible phase transition of material;Lithium titanium aluminum phosphate can construct interface with excellent ion and electron conductivity characteristics, further promote the rapid conduction of lithium ion in positive electrode material.Lithium cobaltate positive electrode coated with double coating has double-layer lithium ion conductor coating layer, to a certain extent, play the dual role of physical barrier and chemical stability, meet the high-pressure cycle stability required by lithium cobaltate positive electrode at present.

The invention provides a lithium titanium aluminum phosphate solid electrolyte, a preparation method and application thereof, and a solid-state battery. The preparation method of the lithium aluminum titanium phosphate solid electrolyte comprises the following steps: adding a titanium source into a sulfuric acid solution, realizing stable dispersion of titanyl sulfate through sulfuric acid, and obtaining a dispersed phase solution after the titanyl sulfate is completely and uniformly dissolved; and adding an aluminum source, a lithium source and a phosphorus source into the dispersed phase solution, stirring to gradually remove a part of the solvent, adjusting the concentration to obtain a mixture without flowing liquid, putting the mixture into a muffle furnace, calcining, and grinding to obtain the lithium titanium aluminum phosphate solid electrolyte after calcining. The method has the advantages of a solid phase and a liquid phase, a liquid phase mixing-solid phase sintering method is realized, low-cost raw materials are used, uniform synthesis of a precursor material is realized through a simple liquid phase evaporation technology, and low-cost and high-performance rapid synthesis of the LATP material is finally realized through solid phase sintering.

The application provides a secondary battery and a power consumption device. The secondary battery comprises a positive electrode sheet, a negative electrode sheet and a separator, the separator is located between the positive electrode sheet and the negative electrode sheet, the separator comprises a first polymer layer and a material layer arranged on the first polymer layer, the material layer comprises inorganic material, the inorganic material comprises one or more of lithium aluminum titanium phosphate, lithium aluminum germanium phosphate, lithium aluminum titanium germanium phosphate, lithium aluminum titanium tantalum phosphate, lithium tetra-thiophosphate, lithium germanium phosphorus sulfide, lithium phosphorus sulfide chloride, titanium dioxide, wherein, in a longitudinal section view of the separator, the difference between the porosity of the material layer and the porosity of the first polymer layer is less than or equal to 5%, the porosity of the material layer is 15%-30%, and the porosity of the first polymer layer is 15%-30%; and the thickness of the separator is 10-15 mu m. The secondary battery has excellent high-rate cycle performance, and the battery has a long service life.

This invention discloses a heat treatment method for carbon-coated lithium titanium phosphate anode material, comprising heat treating a precursor of the carbon-coated lithium titanium phosphate anode material. The heat treatment includes the following steps: a first heat treatment at temperature T1 and holding time t1; a second heat treatment at temperature T2 and holding time t2; and a third heat treatment at temperature T3 and holding time t3. The temperature T1 of the first heat treatment is lower than the temperature T2 of the second heat treatment, and the temperature T2 of the second heat treatment is lower than the temperature T3 of the third heat treatment. By adjusting the heat treatment regime, this invention facilitates the timely removal of water molecules released by the thermal decomposition of the raw material components in the precursor, reduces particle agglomeration, improves the uniformity of carbon coating, and controls the grain size and morphology of the coated particles, thereby effectively improving the discharge specific capacity and cycle stability of the battery.

The invention discloses a titanium sodium phosphate coated carbon composite manganese-based Prussian blue material and a preparation method thereof, as a positive electrode material, a carbon material is added into a manganese-based Prussian blue slurry subjected to primary aging, and then secondary aging is performed, so that the electronic conductivity of the Prussian blue material is increased, and the conductivity of the Prussian blue material is improved; then adding the sodium titanium phosphate slurry with fixed particle size and concentration at a certain speed, heating and stirring, and then carrying out third aging; by controlling the time and temperature of three times of aging, the sodium titanium phosphate / carbon coated manganese-based Prussian blue positive electrode material with a stable structure and a uniform phase can be obtained. The invention also discloses a sodium ion battery, a positive electrode adopts the titanium sodium phosphate / carbon coated manganese-based Prussian blue positive electrode material, a negative electrode adopts the same titanium sodium phosphate, and the capacity and cycle performance of the battery are tested. The result shows that the battery assembled by using the titanium sodium phosphate coated carbon composite manganese-based Prussian blue material as the positive electrode has excellent specific capacity and better cycle performance.

The invention provides an electrode plate and a preparation method and application thereof in low-concentration rare earth ion recovery, and belongs to the technical field of electrochemistry, the electrode plate comprises a conductor layer and an active layer, the active layer comprises a titanium phosphate composite electrode material, a conductive agent and an adhesive, the titanium phosphate composite electrode material comprises inner core particles and a shell layer from inside to outside, the inner core particles are conductive particles, and the shell layer is composed of titanium phosphate nanosheets. The electrode plate active layer adopted by the invention comprises a titanium phosphate composite electrode material, and titanium phosphate adsorbs rare earth ions on the titanium phosphate composite electrode material through chemical complexation; the conductive particles can improve the electrochemical performance of the titanium phosphate, improve the capacitance capacity of the titanium phosphate and reduce the internal resistance, and the titanium phosphate composite electrode material improves the recovery effect of the rare earth ions in the low-concentration rare earth leaching solution through coupling strengthening of the electric field effect.

To provide a titanium phosphate film that exhibits a large specific surface area and high catalytic activity.SOLUTION: A film containing titanium phosphate is configured to have a surface provided with a concavo-convex structure in which nanometer-sized irregularities are repeated.SELECTED DRAWING: Figure 3

The invention relates to an electrochemical device and an electronic apparatus. The electrochemical device comprises a positive plate, a negative plate, a diaphragm and an electrolyte, the electrolyte comprises a first additive, and the first additive comprises a compound with unsaturated alkyl; the diaphragm comprises a base membrane and a coating layer coated on at least one side surface of the base membrane, the coating layer comprises a functional layer, and the material selected by the functional layer at least comprises lithium titanium aluminum phosphate; the electrochemical device meets the condition that (H + 2 * P) / A is larger than 0.21 and smaller than 32.9, and the mass percentage content of the first additive in the electrolyte is A%; the total thickness of the functional layer in the diaphragm is H [mu] m; and the porosity of the diaphragm is P%. According to the scheme provided by the invention, the safety performance of the battery can be improved, and meanwhile, the high-low temperature cycle performance is considered.

The invention specifically discloses a positive plate and a lithium ion battery applying the same. The positive plate comprises a current collector, a bottom coating and a positive active material layer, the bottom coating and the positive active material layer are sequentially arranged on at least one surface of the current collector, and the bottom coating is located between the current collector and the positive active material layer; the bottom coating layer comprises lanthanum fluoride nanoparticles and lithium aluminum titanium phosphate; the positive active material layer includes a ternary active material. The high-temperature-resistant performance of the high-nickel lithium battery can be remarkably improved while the high-nickel lithium battery has the dynamic performance of the high-nickel lithium battery.

Provided is a titanium phosphate coating film having a large specific surface area and high catalytic activity. This coating film, which contains titanium phosphate, is configured so as to have an uneven structure in which nanometer-sized dips and bumps are repeated on a surface.

The invention belongs to the field of solid electrolyte of a solid-state battery, and relates to the field of lithium titanium aluminum phosphate solid-state dielectric media, in particular to a method for improving the purity and ionic conductivity of an LATP solid-state electrolyte. By introducing the sintering aid Bi2O3, the raw materials are crystallized at a relatively low temperature, so that the volatilization of lithium in the sintering process is inhibited, the generation of impure phases such as AlPO4 is reduced, and the purity of the product is improved. In addition, Se is introduced as a dopant for Ti-site doping, so that the unit cell volume is increased, an ion transport channel is expanded, and the ionic conductivity of LATP is improved.

This invention belongs to the field of all-solid-state lithium metal batteries and discloses a method for preparing a lithium-rich titanium phosphate lithium solid electrolyte and its application. The preparation method of this invention has the advantages of simplicity, energy saving, and suitability for large-scale production. By optimizing precursor preparation and reaction conditions, the synthesis temperature is significantly reduced and the reaction cycle is shortened. The resulting electrolyte material has a pure phase and excellent ionic conductivity, effectively solving the key challenges in the practical preparation of this material. This method is of great value in promoting the industrial application of high-safety, high-energy-density solid-state lithium metal batteries. The solid electrolyte powder prepared by this method is in the form of nanoparticles with a narrow particle size distribution, and exhibits a bulk room-temperature ionic conductivity exceeding [value missing] and a total ionic conductivity exceeding [value missing]. This invention is of great significance for the large-scale production of solid-state electrolytes and the promotion of their application in lithium metal batteries.