71 results about "Titanium phosphate" patented technology

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 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 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 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 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 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.

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.

This invention provides a lithium cobalt oxide cathode material coated with a lithium aluminum titanium phosphate composite, which has a core-shell structure, comprising a doped lithium cobalt oxide core material inside the core-shell structure and a coating layer formed on the surface of the doped lithium cobalt oxide core material; the chemical formula of the doped lithium cobalt oxide core material is: LiCo 1‑a‑b‑c Mg a Al b Ce c The coating layer comprises lithium aluminum titanium phosphate, cerium titanate, lithium cerium phosphate oxide, and lithium cerium phosphate. This invention's lithium aluminum titanium phosphate composite coating modified lithium cobalt oxide cathode material overcomes the defect of a sharp performance drop under high temperature and high pressure applications when lithium aluminum titanium phosphate is coated alone. The oxygen vacancies and coating structure provided by the composite coating layer of lithium aluminum titanium phosphate, cerium titanate, lithium cerium phosphate oxide, and lithium cerium phosphate enhance the structural continuity between the bulk phase and the coating layer, as well as the conductivity of the fast ion conductor, thereby enabling the material to maintain good cycle retention and capacity characteristics under high temperature and high pressure.

The method for manufacturing the solid electrolyte thin film includes mixing a first precursor for synthesizing lithium lanthanum zirconium oxide, a second precursor for synthesizing lithium aluminum titanium phosphate or a third precursor for synthesizing lithium lanthanum titanium oxide, a polar solvent and a metal oxide containing a doping element to form a mixture. The first precursor includes a lithium source, a lanthanum source and a zirconium source, the second precursor includes a lithium source, an aluminum source, a titanium source and a phosphate, and the third precursor includes a lithium source, a lanthanum source and a titanium source. The mixture is ground to form a powder mixture. The powder mixture is calcined to form a doped powder. The doped powder, a lithium salt and a conductive polymer are mixed to form a slurry. A wet thin film is formed from the slurry. The wet thin film is baked. The solid electrolyte thin film can effectively reduce the interface impedance between the electrolyte and the positive and negative electrodes, and can have better charge and discharge performance when applied to a battery.

The invention discloses a lithium aluminum titanium phosphate solid electrolyte and a preparation method of the lithium aluminum titanium phosphate solid electrolyte with low wall adhesion rate. Weighing a lithium source, an aluminum source, a titanium source and a phosphorus source, adding an ethanol solvent, and treating by adopting a sand mill to obtain a mixed raw material; drying the mixed raw material by using a vacuum drying oven to obtain a powder precursor; and putting the precursor into a special mold with a double-layer structure and a gradient composite coating on the surface, and performing low-wall-adhesion sintering at 800-1200 DEG C in an air atmosphere to obtain the pure-phase lithium aluminum titanium phosphate solid electrolyte. The surface of the grinding tool is sequentially coated with a bottom porous Al2O3 layer and a surface graphene composite coating through a plasma spraying and chemical vapor deposition method. The bottom porous Al2O3 layer realizes mechanical anchoring and thermal expansion matching, so that layer cracking is avoided; the surface nano graphene layer provides a super-lubricating interface and a Li < + > diffusion barrier, physical-chemical synergistic anti-sticking is realized, the problem that a product is difficult to take out due to wall sticking in the sintering process is greatly improved, and the wall sticking rate is reduced.

This invention discloses a method for preparing and applying boron ion-doped modified titanium manganese phosphate, belonging to the field of sodium-ion battery cathode material preparation technology. The method includes the following steps: dissolving a carbon source, a sodium source, and a manganese source in an ethanol solution and stirring to obtain a mixture A; dissolving a titanium source in an ethanol solution and stirring to obtain a mixture B; dissolving a phosphorus source and a boron source in a deionized aqueous solution and stirring to obtain a mixture C; slowly adding mixtures B and C sequentially to mixture A and stirring to obtain a mixture D; subjecting mixture D to oil bath heating, drying, and calcination treatment sequentially to obtain boron ion-doped modified titanium manganese phosphate. This invention prepares a boron ion-doped modified titanium manganese phosphate and applies it to sodium-ion battery cathode materials. By doping boron ions into titanium manganese phosphate, a boron ion-doped modified titanium manganese phosphate cathode material with excellent electrochemical performance is prepared.

The invention relates to the technical field of sodium ion batteries, in particular to a modified layered transition metal oxide material and a preparation method and application thereof. The modified layered transition metal oxide material comprises a doped and modified layered transition metal oxide core and a coating layer coating the surface of the core, the core of the doped and modified layered transition metal oxide is Na < x > Ni Mn M < c > O < 2 >, xlt; 1, 0lt; a < lt >; 0.33, 0 lt; blt; 0.67, a + b + c = 1; m is selected from at least three of Ti < 4 + >, Zn < 2 + >, Mg < 2 + >, Cu < 2 + >, W < 5 + >, Mo < 4 + >, Sn < 4 + >, Sb < 5 + >, Zr < 4 + >, Al < 3 + >, Fe < 3 + >, Ca < 2 + >, V < 3 + >, Y < 3 + > or Ce < 4 + > ions; and the coating layer comprises the following components: carbon and sodium titanium phosphate. The modified layered transition metal oxide material provided by the invention has excellent stability and cycle performance.

The invention relates to the field of lithium ion battery positive electrode materials, in particular to a preparation method of a sodium titanium phosphate surface modified lithium iron phosphate positive electrode material. The problem that existing lithium iron phosphate is poor in rate performance and cycle performance is solved. The sodium titanium phosphate surface modified lithium iron phosphate positive electrode material comprises sodium titanium phosphate surface modified lithium iron phosphate powder, acetylene carbon black and polyvinylidene fluoride, according to the preparation method, firstly, gadolinium ions and dysprosium ions are added in the process of synthesizing lithium iron phosphate, electrostatic bonding between lithium ions and surrounding atoms is reduced, the rate performance is improved, then sodium titanium phosphate is synthesized, the sodium titanium phosphate has a three-dimensional lithium ion diffusion channel, the rate performance and the cycle performance of the lithium iron phosphate material are improved, and the lithium iron phosphate material can be used as a lithium ion battery. The lithium iron phosphate, glucose and polyethylene glycol are used as coating layers to be coated on the surface of the lithium iron phosphate; the rate capability and the cycle performance of the existing lithium iron phosphate material are remarkably improved, and the material can be applied to energy storage devices.

This application provides a secondary battery and an electrical device. The secondary battery includes a positive electrode, a negative electrode, and a separator, with the separator located between the positive and negative electrodes. The separator includes a first polymer layer and a material layer disposed on the first polymer layer. The material layer includes an inorganic material, and the first polymer layer includes polyethylene. The inorganic material includes one or more of lithium aluminum titanium phosphate, lithium aluminum germanium phosphate, lithium aluminum germanium titanium phosphate, lithium aluminum tantalum titanium phosphate, lithium tetrathiophosphate, lithium germanium phosphorus sulfide, lithium phosphorus sulfide, and titanium dioxide. In a longitudinal cross-section 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 10%, and the porosity of both the material layer and the first polymer layer is 10%-30%. The thickness of the separator is 5 μm-25 μm. The positive electrode includes a positive active material layer containing lithium iron phosphate. This secondary battery exhibits excellent high-rate cycle performance and a long service life.

The invention discloses a preparation method of a nano porous lithium aluminum titanium phosphate solid electrolyte material. The preparation method comprises the following steps: S1, adding a complexing agent and a polymer template agent into a mixed solution formed by a lithium source, an aluminum source, a titanium source and a phosphorus source; s2, carrying out electrostatic spraying and vacuum freeze drying treatment; s3, grinding and pyrolysis treatment; s4, dipping in liquid containing lithium ions; s5, a gradient oxide intermediate layer composed of titanium and aluminum metal elements is deposited through a plasma enhanced atomic layer deposition method; and S6, oxidizing the residual precursor to form a gradient oxide coating layer, and curing the ionic liquid in situ to finally obtain the nano-porous lithium aluminum titanium phosphate solid electrolyte material. According to the preparation method disclosed by the invention, the ion migration rate of the lithium aluminum titanium phosphate solid electrolyte material is remarkably improved, side reaction is inhibited, the mechanical strength and thermal stability of the material are maintained, and the requirements of an all-solid-state lithium ion battery on high energy density, long cycle life and safety can be met.

The invention belongs to the field of all-solid-state lithium metal batteries, and discloses a high-content lithium-rich lithium titanium phosphate electrolyte membrane as well as a preparation method and application thereof. In order to improve the application potential in a large-scale lithium metal battery, aiming at the problems of insufficient ionic conductivity and the like caused by low oxide content in the existing oxide solid electrolyte membrane, the invention firstly realizes clean and efficient preparation of lithium-rich titanium lithium phosphate through a potential large-scale hydrothermal synthesis method; and the electrolyte membrane with the mass content of lithium-rich lithium titanium phosphate exceeding 65% is further prepared by optimizing a slurry formula and a coating film-forming process. The membrane exhibits high ionic conductivity. Meanwhile, the coating method adopted by the invention is compatible with the existing production equipment and process, so that the manufacturing cost and process difficulty of the all-solid-state lithium metal battery are remarkably reduced, the practical development of the all-solid-state lithium metal battery towards high energy density and high safety is promoted, and the method has important academic value and industrial significance.

The invention relates to a composite diaphragm, a preparation method thereof and a battery in the technical field of lithium battery production. The composite diaphragm comprises a base membrane, a first coating and a second coating, wherein the first coating and the second coating are positioned on two side surfaces of the base membrane; the base film comprises a polyolefin material; the first coating comprises modified lithium aluminum titanium phosphate (LATP) particles, and modification is characterized in that inert elements are introduced in the LATP synthesis process for doping and / or inert functional group surface grafting is carried out on the LATP particles; the second coating comprises an aramid fiber material; wherein the inert element is selected from at least one element of boron (B), europium (Eu), lanthanum (La) and yttrium (Y), and the inert functional group is selected from at least one functional group of siloxane group and amino functional group. The modified LATP coating and the aramid fiber coating are arranged on the two sides of the polyolefin base membrane respectively, and through the high-temperature-resistant characteristic of the aramid fiber coating and the ion conduction optimization synergistic effect of the modified LATP coating, the thermal stability of the diaphragm is remarkably improved, lithium dendrite puncture is prevented, the thermal runaway risk of a battery cell is reduced, and the ion transmission efficiency of the diaphragm at low temperature is improved.

This invention provides a lithium titanium dioxide sodium phosphate anode material and an aqueous lithium-iodine battery based thereon, belonging to the field of secondary battery technology. The chemical formula of the lithium titanium dioxide sodium phosphate anode material is Li. x Na y Ti2(PO4)3, where 0

This invention provides a positive electrode active material and its preparation method, a positive electrode sheet, and a battery. The positive electrode active material includes a core material and a shell material disposed on at least a portion of the surface of the core material. The shell material includes lithium aluminum titanium phosphate, and the core material includes M-doped lithium nickel manganese oxide active material, wherein M includes titanium, phosphorus, and yttrium. The positive electrode active material of this invention, based on a dual strategy of titanium, phosphorus, and yttrium co-doping and lithium aluminum titanium phosphate coating, solves the problems of poor structural stability and severe interfacial side reactions of lithium nickel manganese oxide at high temperatures, while also effectively ensuring its normal specific capacity.

The application belongs to the technical field of sodium-ion battery positive electrode materials, and particularly relates to a method for preparing a sodium titanium manganese phosphate positive electrode material by a solid-phase method.The method comprises the following steps: adding a sodium source, a phosphorus source, a manganese source, a titanium source and a transition metal compound M into water and stirring until they are uniformly mixed, then adding a carbon source and a dispersing agent, mixing until they are uniformly mixed, and performing sand milling to obtain a precursor slurry; and performing spray drying on the precursor slurry, and then performing high-temperature sintering to obtain the sodium titanium manganese phosphate positive electrode material.The sodium titanium manganese phosphate positive electrode material prepared by the method has excellent crystallinity, high discharge capacity and high first coulomb efficiency, and good cycle stability; meanwhile, the solid-phase synthesis process is stable and controllable, and large-scale industrial production of the NMTP material is realized.The positive electrode material can be widely applied to low-speed electric vehicles, energy storage power stations and other scenes, and has a good application prospect.

The invention discloses a preparation method of a sodium titanium phosphate negative electrode material. The method comprises the following steps that S1, sodium ions are embedded into titanium dioxide through an electrochemical method, a sodium titanate compound is obtained, the chemical general formula of the sodium titanate compound is NaxTiO2, and x is larger than or equal to 0.5 and smaller than or equal to 0.8; s2, the sodium titanate compound in the step S1 is mixed with phosphate, a precursor mixture is obtained, and the molar ratio of Ti to P in the sodium titanate compound and the phosphate is 2: 3; and S3, sintering the precursor mixture obtained in the step S2 under the protection of inert gas to obtain the sodium titanium phosphate negative electrode material with the NASICON type structure. Through an electrochemical sodium pre-embedding process, uniform mixing of reactants at an atomic level is realized, the temperature and energy consumption of a subsequent solid-phase reaction are remarkably reduced, and the reaction time is shortened. Meanwhile, the preparation method is simple and low in cost, and the prepared product is high in purity and has a good application prospect.

The invention relates to the field of solid electrolyte, in particular to a doped lithium aluminum titanium phosphate solid electrolyte membrane as well as a preparation method and application of the doped lithium aluminum titanium phosphate solid electrolyte membrane. And carrying out spin coating, drying and segmented calcination treatment on the obtained gel to obtain the doped titanium-aluminum-lithium phosphate solid electrolyte membrane. According to the preparation method disclosed by the invention, liquid raw materials including lithium isopropoxide, titanium isopropoxide, isopropanolamine phosphate, aluminum isopropoxide and an isopropanol alkaline earth metal compound are uniformly mixed and reacted at a molecular level, so that the chemical stability of the prepared gel is ensured, and the phenomenon that the gel is cracked due to local stress concentration is avoided; and the film material is ensured to be uniform and compact at the micron level through spin coating and segmented calcination treatment of the gel.

A method for increasing the specific surface area of titanium phosphate plate-shaped particles of this invention includes: obtaining a liquid in a state where a powder containing titanium phosphate plate-shaped particles is dispersed in an aqueous alkaline solution.

The invention provides a diaphragm as well as a preparation method and application thereof. The diaphragm at least comprises a base membrane, the coating is arranged on at least one side of the base membrane, the coating on at least one side at least comprises solid electrolyte particles, and the material of the solid electrolyte particles comprises one or a mixture of two of lithium titanium phosphate and oxide. According to the diaphragm as well as the preparation method and the application thereof, the stability of the diaphragm to an electrode plate can be ensured, the insulativity of the diaphragm is improved, the production cost of the diaphragm is reduced, and the diaphragm is suitable for commercial application.

The invention relates to a sodium titanium phosphate negative electrode material and a lithium iron phosphate and sodium titanium phosphate mixed ion battery, and relates to the technical field of battery preparation. The invention aims to construct a stable and efficient lithium iron phosphate / sodium titanium phosphate battery system, the battery is a mixed ion battery, lithium iron phosphate is used as a positive electrode, modified sodium titanium phosphate is used as a negative electrode, and electrolyte contains lithium salt and sodium salt at the same time; wherein the modified titanium sodium phosphate accords with the chemical formula of Na1 + zAlxTi2-x (PO4-y) 3 (at) C-S, preferably, x is greater than or equal to 0.01 and less than or equal to 0.07, and y is greater than or equal to 0.01 and less than or equal to 0.05, zgt; the preparation method comprises the following steps: mixing a sodium source, an aluminum source, a titanium source and a phosphorus source according to a stoichiometric ratio, carrying out heat treatment, introducing oxygen vacancies into the mixture, and finally coating the surface with the sulfur-doped carbon coating layer. The prepared battery is excellent in performance, the specific capacity reaches 140mAh / g, and the cycling stability of 500 cycles is still kept to be 99% or above.

The invention belongs to the technical field of electrochemical metal ion battery materials, and discloses a high-entropy-doped sodium titanium phosphate battery negative electrode material, a preparation method and application, the high-entropy-doped sodium titanium phosphate battery negative electrode material is prepared by a sol-gel method, NaTi2 (PO4) 3 is prepared from a titanium source, citric acid, a sodium source and a phosphorus source and serves as a main body structure, aluminum magnesium tin niobium metal cations are introduced into a Ti site, and the high-entropy-doped sodium titanium phosphate battery negative electrode material is obtained. A high-entropy doped sodium titanium phosphate material with uniform element distribution and a stable NASICON structure is obtained through sol formation, gel drying and calcination, and then the high-entropy doped sodium titanium phosphate material is mixed with a conductive agent and a binder to prepare an electrode slurry sodium titanium phosphate battery negative electrode material, so that lattice regulation and control, configuration entropy stability and charge transfer performance improvement are realized. The prepared material has high initial reversible capacity, low oxidation / reduction peak potential difference and excellent cycle stability.

This invention belongs to the field of all-solid-state lithium metal batteries, and discloses the application of a lithium-rich titanium phosphate lithium solid electrolyte in batteries and its preparation method. The chemical formula of the lithium-rich titanium phosphate lithium solid electrolyte is [chemical formula missing]. Studies have found that this solid electrolyte has a bulk room-temperature ionic conductivity exceeding [specific value missing] and exhibits good stability to lithium metal. Furthermore, a solid-state lithium metal battery assembled with a lithium iron phosphate cathode achieved a discharge specific capacity of [specific value missing] at 0.1C, and after 100 cycles at 0.2C, the capacity retention rate still reached over 92%. The lithium-rich titanium phosphate lithium solid electrolyte of this invention is not only low-cost, simple to prepare, and environmentally friendly, but also has high ionic conductivity and good stability to lithium metal, overcoming the shortcomings of NASICON-type solid electrolytes in terms of instability to lithium metal, and has great application prospects in the field of solid-state lithium metal batteries.

The application discloses a preparation method of papermaking water slurry titanium white, and comprises the following steps: S1. taking titanium white powder base slurry, and sequentially carrying out titanium phosphate, aluminum phosphate and aluminum oxide coating; S2. dehydrating the coated slurry to obtain a filter cake, and then adding a first dispersant for beating; the first dispersant is a phosphine group-containing polycarboxylic acid; S3. carrying out microwave heating on the beaten slurry; S4. adding a second dispersant to the microwave-heated slurry, and grinding to obtain papermaking water slurry titanium white, wherein the second dispersant is a positively charged compound. The application firstly improves the surface defects of the titanium white powder through inorganic coating treatment, then adopts the phosphine group-containing polycarboxylic acid as the dispersant for beating, adopts the positively charged compound as the dispersant for grinding, and adopts microwave heating in the beating and grinding processes, so that the agglomeration between titanium white powder particles is effectively eliminated, the dispersibility of the water slurry is improved, and the papermaking water slurry titanium white with high stability is directly obtained.