629results about "Niobium compounds" patented technology

The invention discloses a molybdenum disulfide and lithium-lanthanum-niobium-oxygen co-coated lithium-rich manganese-based positive electrode material and a preparation method thereof, and realizes double uniform coating of molybdenum disulfide and lithium-lanthanum-niobium-oxygen on the surface of the lithium-rich manganese-based positive electrode material by combining freeze drying and calcining technologies. The double coating layer not only can be used as a stable protective layer to prevent the positive electrode material from being eroded, but also can form a stable coating structure by utilizing the physical and electrochemical compatibility between two adjacent elements of molybdenum and niobium in the same period, so that the electrochemical performance is optimized, the'deoxidation 'phenomenon is avoided, and the service life of the positive electrode material is prolonged. Under co-coating of the molybdenum disulfide and the lithium lanthanum niobium oxide, the lithium-rich manganese-based positive electrode material co-coated with the molybdenum disulfide and the lithium lanthanum niobium oxide is obtained, and the lithium-rich manganese-based positive electrode material co-coated with the molybdenum disulfide and the lithium lanthanum niobium oxide can guarantee the first effect and the specific capacity of the battery and can fully optimize the cycle performance of the battery.

The invention relates to the technical field of lithium ion batteries, in particular to a composite lithium-rich manganese-based positive electrode material and a preparation method and application thereof. The composite lithium-rich manganese-based positive electrode material is of a three-layer structure and sequentially comprises a lithium-rich manganese-based oxide positive electrode material matrix, a first coating layer and a second coating layer from inside to outside, the first coating layer is a mixture of halide solid electrolyte and lithium-containing oxide; and the second coating layer is an oxide solid electrolyte. The conductivity of a contact interface with a positive electrode material can be improved, the resistance is reduced, the moisture absorption degradation of halide is inhibited, the packaging difficulty is reduced, and the cycle performance of the halide-added solid electrolyte after moisture absorption is improved.

The present invention relates to a niobium metal oxide, niobium metal oxide secondary particles and a method for preparing the same, and a working electrode and an electrochemical cell comprising the niobium metal oxide secondary particles. The niobium metal oxide has the formula (I): NbxMyOz, where M is a metal selected from the group consisting of Ti, Zr, V, Cr, W and Mo, x is 2 to 18, z is 2.5 x + 3y and x / y is 1 to 3, and the crystal structure of the niobium metal oxide is a tetragonal tungsten bronze structure having four or eight pentagonal channels per cell, and a portion of the pentagonal channels is filled with-Nb-O-Nb-O-chains, and the remainder of the pentagonal channel is optionally embedded with lithium.

The invention belongs to the field of lithium ion battery raw materials, and particularly relates to a niobium-based composite material and a preparation method and application thereof. The composite negative electrode material is composed of a niobium-based framework material, a high-capacity material and a coating material. The niobium-based composite negative electrode material takes a porous niobium-based material as a framework, so that the characteristics of high stability, high safety and rapid charging and discharging of the niobium-based negative electrode material are kept; the high-capacity material is embedded in a niobium-based skeleton pore structure, so that the gram volume of the niobium-based material is improved, and meanwhile, the problem of rapid capacity attenuation caused by high volume expansion of the high-capacity material is solved; the coating material coats the surfaces of the niobium-based framework and the high-capacity material, and the high-capacity material is sealed in holes of the niobium-based framework material, so that on one hand, the conductivity of the niobium-based material can be improved, on the other hand, precipitation of the high-capacity material is inhibited, and the cycling stability of the composite negative electrode material is further improved. And the prepared niobium-based composite negative electrode material is simple in preparation process flow and has good adaptability to the preparation process of the existing lithium ion battery.

The invention provides a lithium manganese iron phosphate positive electrode material and a preparation method thereof, a lithium ion battery and electric equipment, and relates to the technical field of new energy. According to the lithium manganese iron phosphate positive electrode material provided by the invention, the amorphous precursor and the high-crystallization precursor are used as raw materials, and the high-crystallization precursor causes a relatively high specific surface area of the material and affects the processability; the amorphous precursor can improve the compaction density and the specific surface area of the material, and the capacity and the cycle performance of the lithium manganese iron phosphate positive electrode material are ensured by combined use of the two precursors. The combination of elements with different valence states is used, so that the doping and coating effects are achieved at the same time, and the performance of the material is synergistically improved; elements with relatively low valence states are easily doped in a lithium manganese iron phosphate crystal structure, so that the capacity of the material is improved; and elements with relatively high valence states are distributed on the surfaces of lithium manganese iron phosphate particles, so that the stability of the surface structure of the material is improved.

The invention provides a modified lithium cobalt oxide positive electrode material and a preparation method thereof.The modified lithium cobalt oxide positive electrode material is of a core-shell structure and comprises a magnesium-aluminum-doped lithium cobalt oxide core material serving as the core-shell structure and a coating layer formed on the surface of the magnesium-aluminum-doped lithium cobalt oxide core material, and the coating layer is lithium titanium aluminum phosphate, lithium niobate and lithium phosphate; the chemical formula of the lithium titanium aluminum phosphate is Li < 1 + x > Al < x > Ti < 1 + 1-x > (PO4) 3, the chemical formula of the lithium niobate is Li3NbO4, the weight of the coating layer accounts for 0.2-2% of the weight of the modified lithium cobalt oxide positive electrode material, the weight ratio of the lithium titanium aluminum phosphate to the lithium niobate in the coating layer is 1: (0.4-2), and the chemical formula of the magnesium-aluminum doped lithium cobalt oxide core material is LiCo < 1-a-b-c > Mg Al Nb < c > O2. The modified lithium cobalt oxide positive electrode material provided by the invention has better battery performance at high temperature, high voltage and high rate.

A modified lithium-rich manganese-based positive electrode material, and a preparation method therefor and the use thereof. The modified lithium-rich manganese-based positive electrode material comprises a lithium-rich manganese-based positive electrode material, wherein the bulk phase of the lithium-rich manganese-based positive electrode material is doped with a high-valent transition metal element, and the surface phase of the lithium-rich manganese-based positive electrode material has a lithium metal compound coating layer and an oxygen vacancy. In the modified lithium-rich manganese-based positive electrode material, the doping with a bulk-phase high-valence transition metal element, the coating with a surface-phase lithium metal compound coating layer and the construction of an oxygen vacancy are conducted at the same time; and by means of the co-action of the three, the rate capability and the cycling performance of the lithium-rich manganese-based positive electrode material can be significantly improved, which is of great significance for the further commercialization of the lithium-rich manganese-based positive electrode material.

The invention discloses a double-metal gradient diffusion layer modified high-nickel ternary positive electrode material and a preparation method thereof. The preparation method comprises the following steps: filtering and uniformly dispersing high-nickel ternary positive electrode material powder; introducing inert gas into the atomic layer deposition system, and raising the temperature to a target temperature; respectively preheating the metal precursors A and B to proper temperatures; the preparation method comprises the following steps: sequentially introducing a metal precursor A, precursor water, a metal precursor B and precursor water into a reaction chamber, alternately depositing according to a pulse-reaction-purging sequence, and repeatedly circulating the process to obtain the bimetallic oxide coated high-nickel ternary positive electrode material, and post-annealing treatment. According to the bimetal gradient diffusion layer modified high-nickel ternary positive electrode material prepared by the preparation method disclosed by the invention, the lithium storage performance of the high-nickel ternary material is greatly improved, excellent cycling stability and rate capability are obtained, the coating layer is accurate and controllable, the preparation process is simple, meanwhile, large-batch production can be realized, and relatively high application value is achieved.

The invention relates to the technical field of battery positive electrode materials, discloses a manganese-based battery positive electrode material precursor as well as a preparation method and application thereof, and belongs to the technical field of battery preparation. According to the technology for preparing the manganese-based battery positive electrode material precursor, a solid-phase method is mainly adopted, a high-temperature melting technology is adopted, the manganese-based positive electrode material is subjected to doping modification through multiple elements at the same time, then surface coating is carried out, the density of the synthesized positive electrode material is improved, the structural stability of the synthesized positive electrode material is enhanced, and the morphology, the crystal face and the crystal boundary of the positive electrode material are optimized; the side reaction between the crystal interface of the positive electrode material and electrolyte is inhibited, the service life is prolonged, and the safety performance during use is enhanced. A small amount of water vapor and carbon dioxide gas generated in the preparation process are discharged at high altitude, so that the environment is not polluted.

A positive-electrode material according to the present disclosure includes a positive-electrode active material and a coating layer covering the positive-electrode active material, wherein the coating layer contains niobium and carbon, the positive-electrode active material and the coating layer constitute a coated active material, and the ratio Nb / C of the niobium content to the carbon content in a surface layer portion of the coated active material is 0.11 or more based on the atomic ratio.

The invention provides a temperature-resistant radar infrared compatible stealth coating and a preparation method thereof. The problems that an existing radar infrared compatible stealth coating is insufficient in temperature resistance and poor in low-frequency wave absorbing performance are solved. The temperature-resistant radar and infrared compatible stealth coating sequentially comprises a bonding layer, a wave absorbing layer and an infrared stealth layer from bottom to top, the bonding layer is made of NiCrAlY or NiCoCrAlY, and the bonding layer is made of NiCoCrAlY; the material of the wave absorbing layer is 20 wt%-65 wt% of a ceramic matrix and 80 wt%-35 wt% of an absorbent; the chemical formula of the absorbent is Fe0. 7Al0. 3Ti (1-x) RxO3, in the formula, x is equal to 0.2-0.55, and R is Ni, Nb or Ta; the infrared stealth layer is a precious metal layer arranged in a periodic structure.

The invention provides a halide solid electrolyte as well as a preparation method and application thereof, and particularly relates to the technical field of lithium batteries. The chemical formula of the halide solid electrolyte is Li < 2.8 > In M X < 6 >, m is a doping element and is selected from at least one of Nb, Ta, Zr, Mo, W, Gd, Al, Sc, Sb, Sn and V; x is halogen and is selected from at least one of F, Cl, Br and I; a and b satisfy 3a + mb = 3.2, wherein m is the valence state of M. According to the halide solid electrolyte provided by the invention, In is partially replaced by the doping element, a cation vacancy is introduced by the high valence state of the doping element, a three-dimensional diffusion channel of lithium ions is expanded, and the ionic conductivity of the solid electrolyte at room temperature is improved; meanwhile, halide generates a stable halogen-rich interface layer on the surface of the positive electrode in situ, so that side reaction is inhibited, and the cycle performance is improved. The halide solid electrolyte is better matched with a positive electrode material, the loading capacity and the reversible capacity of a positive electrode active material can be further improved, and the energy density of the battery is improved.

The invention provides a beneficiation-metallurgy combined comprehensive utilization process for dilute separation tailings, which comprises the following steps: carrying out ore grinding and flotation treatment on the dilute separation tailings to obtain fluorite rough concentrate and flotation tailings; magnetically roasting the mixed reducing agent and the flotation tailings, and magnetically separating to obtain magnetically separated rough concentrate and magnetically separated rough tailings; carrying out fine grinding and magnetic separation on the magnetic separation rough concentrate to obtain a magnetic separation iron concentrate product and magnetic separation concentrate tailings; the magnetic separation coarse tailings and the magnetic separation fine tailings are mixed, and then acid washing liquid and acid washing residues are obtained after acid washing and solid-liquid separation are conducted in sequence; and carrying out pressurized acid leaching, solid-liquid separation and extraction on the pickling residues to obtain scandium oxide and niobium oxide. By adopting the flotation-magnetizing roasting-magnetic separation-acid pickling-pressurized acid leaching combined process, the fluorite coarse ore, the iron ore concentrate, the rare earth leaching solution and the niobium-scandium leaching solution are obtained, the comprehensive utilization rate of the tailings is greatly increased, the discharge amount of the tailings is reduced, the acid consumption of tailings treatment is reduced, the environmental pressure is reduced, and the benefits of enterprises are improved.

The present invention provides a method for manufacturing a dental prosthesis in which defective baking of a porcelain material is suppressed by using a zirconia composite sintered body that contains Nb2O5 and / or Ta2O5. The present invention relates to a method for manufacturing a dental prosthesis, the method comprising a step for performing a heat treatment or a polishing treatment as a pretreatment on a zirconia composite sintered body that contains Nb2O5 and / or Ta2O5, and a step for building up a porcelain material on the pretreated zirconia composite sintered body and performing firing.

The invention provides composite coated high-stability lithium-rich lithium ferrite and a preparation method thereof, and belongs to the field of lithium ion battery positive electrode lithium supplements.The preparation method of the composite coated high-stability lithium-rich lithium ferrite comprises the steps that an iron source and a lithium source are mixed, and a first mixture is obtained; performing first calcining treatment on the first mixture to obtain a calcined product; mixing and dispersing the calcined product and a metal compound to obtain a second mixture; carrying out second calcining treatment on the second mixture to obtain composite coated high-stability lithium-rich lithium ferrite; wherein the ratio of the amount of substance of the lithium element in the lithium source to the amount of substance of the iron element in the iron source is greater than 5. According to the method, excessive lithium sources are introduced, so that a large amount of residual lithium on the surface of Li5FeO4 forms a residual alkali layer, the residual alkali layer is converted into a compact and complete metal lithium oxide coating layer under the action of the metal compound and the second calcination treatment, and the air stability of Li5FeO4 is effectively improved.

The invention relates to the technical field of niobium-tantalum-iron ore purification, in particular to a method for preparing high-purity tantalum pentoxide and niobium pentoxide from niobium-tantalum-iron ore. The method comprises the following steps: firstly, adding ammonium fluoride and ammonium sulfate to help mineral decomposition and reduce the roasting temperature, then treating the niobium-tantalum iron ore by using a sulfuric acid-hydrofluoric acid mixed solution to fully dissolve niobium-tantalum oxides, then extracting and separating niobium and tantalum by using a specific solvent system, and finally adding ammonia water to precipitate and calcine to obtain the niobium-tantalum iron ore. The high-purity niobium pentoxide and tantalum pentoxide are prepared, the product yield is high, the impurity content is low, and the niobium pentoxide and tantalum pentoxide are suitable for being used as raw materials of capacitor-grade tantalum powder and niobium powder.

A positive electrode material 1000 in one embodiment of the present disclosure comprises a positive electrode active material 110, a coating layer 111 that includes a first solid electrolyte and covers at least part of the surface of the positive electrode active material 110, and a second solid electrolyte 100. The first solid electrolyte contains Li, M1, and F. M1 is at least one selected from the group consisting of Ti, Al, and Zr. The second solid electrolyte 100 contains Li, M2, O, and X. M2 is at least one selected from the group consisting of Ta and Nb. X is at least one selected from the group consisting of F, Cl, Br, and I.

The invention belongs to the technical field of positive electrode materials, and provides a lithium-rich manganese-based positive electrode material and a preparation method and application thereof. The preparation method comprises the following steps: mixing a manganese-based metal ion solution, a precipitator solution and a complexing agent solution to obtain a manganese-based composite material precursor suspension, and drying to obtain a precursor; mixing the precursor with a lithium source, and then sequentially mixing and reacting with a phosphate radical source, a borate radical source and a niobium source to obtain a phosphorus boron niobate coated precursor; and mixing the precursor with a lithium source, and sintering. The invention also discloses the lithium-rich manganese-based positive electrode material prepared by the method. The positive electrode of the lithium ion battery comprises the positive electrode material. The lithium-rich manganese-based positive electrode material disclosed by the invention has a gradient coating structure, and the structure enables the positive electrode material to be high in capacity, good in cycle performance and less in interface side reaction; according to the invention, an in-situ co-firing bonding process is adopted, and a liquid-phase impregnation-segmented sintering integrated process is adopted, so that chemical bonding of a coating layer and a matrix is realized, interface falling is avoided, and the structural stability is enhanced.

The invention provides a preparation method of a niobium-based oxide negative electrode material with a three-dimensional hierarchical porous structure. The preparation method comprises the following steps: step 1, preparing precursor suspension slurry; the preparation method comprises the following steps: preparing a niobium oxide precursor according to a molar ratio, adding 0.4-5wt% of a dispersing agent, adding a water solvent to prepare a solution with the solid phase content of 10-40% in volume fraction, and putting the solution into a ball milling tank; stirring and grinding the solution; 2, freezing, forming and drying; vacuumizing in a vacuum drying box to remove bubbles in the solution, injecting the solution into a polytetrafluoroethylene tubular mold with the volume of 50-200ml, freezing in liquid nitrogen, and drying in a freeze dryer after the slurry is completely frozen; 3, high-temperature sintering molding; and calcining the dried sample in a muffle furnace in an air atmosphere, and naturally cooling to obtain the niobium-based oxide with the hierarchical pore structure. The uniformity of the negative electrode structure and the wettability of the electrolyte to the interior of the material are improved by regulating and controlling the pore channel distribution and the specific surface area, so that the rate capability and the cycling stability of the material are improved.

The invention discloses a current collector active material and a preparation method and application thereof, and relates to the technical field of electrochemical energy storage. Comprising the following steps: dissolving acid, a niobium precursor and aniline in water to form a solution A; dissolving ammonium persulfate in water to form a solution B, adding the solution B into the solution A, uniformly mixing, standing for reaction, carrying out suction filtration and drying to obtain niobium-doped polyaniline carbon nanotubes, and carrying out heat treatment on the niobium-doped polyaniline carbon nanotubes in a protective atmosphere to obtain amorphous carbon nanotubes embedded with niobium pentoxide nanoparticles. The method can be used for preparing a negative-electrode-free sodium metal battery current collector and a negative-electrode-free sodium metal battery. According to the method, hectogram or even kilogram-level superfine amorphous carbon nanotubes embedded with niobium pentoxide nanoparticles can be prepared in a single batch in a macroscopic manner, and Nb2O5 nanoparticles anchored in the carbon tubes are subjected to reversible intercalation pseudocapacitance reaction, so that the sodium ion migration rate is remarkably increased, sodium ions are preferentially adsorbed, the nucleation overpotential is greatly reduced, and the performance of the carbon nanotubes is improved. And the assembled negative-electrode-free sodium metal total battery shows an extremely high capacity retention ratio.

The invention relates to active electrode materials and to methods for the manufacture of active electrode materials. Such materials are of interest as active electrode materials in lithium-ion or sodium-ion batteries. The invention provides an active electrode material expressed by the general formula [M1]x[M2](1−x)[Nb]y[O]z, wherein: M1 and M2 are different; M1 represents one or more of Ti, Mg, V, Cr, W, Zr, Mo, Cu, Fe, Ga, Ge, Ca, K, Ni, Co, Al, Sn, Mn, Ce, Te, Se, Si, Sb, Y, La, Hf, Ta, Re, Zn, In, or Cd; M2 represents one or more of Mg, V, Cr, W, Zr, Mo, Cu, Ga, Ge, Ca, K, Ni, Co, Al, Sn, Mn, Ce, Sb, Y, La, Hf, Ta, Zn, In, or Cd; and wherein x satisfies 0<x<0.5; y satisfies 0.5≤y≤49 z satisfies 4≤z≤124.

The invention discloses an iron-doped lithium niobate material as well as a preparation method and application thereof, and belongs to the technical field of photoelectric materials. The preparation method of the material comprises the following steps: (1) mixing and grinding 10-100 mg of an iron salt precursor, 200-300 mg of lithium niobate and 500 mg of molten salt to obtain mixture powder; (2) calcining the mixture powder for 0.5-5 hours at the temperature of 350-800 DEG C; and (3) cooling the calcined mixture powder in air, and washing to remove the molten salt to obtain the iron-doped lithium niobate material. The iron-doped lithium niobate material prepared by the preparation method has a relatively stable structure, the light absorption capability is remarkably enhanced, and the application of the iron-doped lithium niobate material in the optical field is facilitated.

The invention discloses a modified solid-state electrolyte and a preparation method and application thereof, and relates to the field of solid-state batteries, in 300 crystal face grain size distribution of the modified solid-state electrolyte, Kn90 = (Ln90-Ln10) / Ln50, and Kn90 is more than or equal to 0.5 and less than or equal to 1.7; wherein Ln10 is the corresponding grain size when the volume distribution cumulative percentage of the 300 crystal face sub-grain size Ln of the modified solid electrolyte reaches 10%, and Ln50 is the corresponding grain size when the volume distribution cumulative percentage of the 300 crystal face sub-grain size Ln of the modified solid electrolyte reaches 50%; ln90 is the corresponding grain size when the volume distribution cumulative percentage of the 300 crystal face sub-grain size Ln of the modified solid electrolyte reaches 90%. According to the invention, the modified solid electrolyte has excellent ionic conductivity, good air stability, interface stability to metal lithium and relatively high oxidation potential stability.

The invention relates to the technical field of electrolyte preparation, in particular to a solid electrolyte and a preparation method and application thereof, and a modified positive electrode material and a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing a lithium source, a metal halogen compound and a solvent, and uniformly stirring to obtain a mixed material; the solvent comprises water and an organic solvent, and the mass content of the water in the solvent is 5%-10%; (2) heating the mixed material, and drying to obtain a solid electrolyte precursor; and (3) microwave sintering. The solid electrolyte precursor is prepared by adopting a wet process, the batch consistency of the solid electrolyte is remarkably improved and the synthesis efficiency is improved by matching with a microwave sintering technology, the preparation of the solid electrolyte with high compactness and uniform grain size is facilitated, and the ionic conductivity is greater than 5mS / cm and is remarkably higher than that of the solid electrolyte prepared by a traditional ball milling method.

The invention provides a preparation method and application of MAX phase derived polymetallic sulfide, and belongs to the field of lithium ion battery negative electrode material preparation. A MAX phase is used as a precursor, metal chlorides such as CuCl2, FeCl2 and CoCl2 are used as etching agents, K2S is used as a sulfur source, and etching in-situ vulcanization is performed under a NaCl / KCl molten salt system to obtain a series of multi-metal sulfide materials. When the prepared multi-metal sulfide material is used as a lithium ion battery negative electrode material, excellent cycle and rate performance is shown.

This invention belongs to the field of microwave absorbing material preparation technology, and discloses a two-step partial oxidation method to improve the microwave absorption performance of MXene materials. By performing hydrothermal pre-oxidation and heat treatment on MXene materials, oxide nanoparticles are grown in situ on their surface, achieving controllable partial oxidation. The MXene matrix retains a two-dimensional layered structure, and a heterogeneous interface is formed between the oxide nanoparticles and the MXene matrix. This adjusts the conductivity, optimizes impedance matching, enhances interface polarization, improves microwave absorption performance, and provides high-temperature stability.

To provide an active material which can realize a secondary battery that can show the excellent output characteristics and cycle life characteristics.SOLUTION: There is provided an active material according to one embodiment. The active material includes a primary particle including an Nb10Ti2O29 phase and at least one Nb rich phase selected from a group consisting of an Nb14TiO37 phase and an Nb24TiO64 phase. In the primary particle, a ratio MNb / MTi of a substance quantity of niobium to a substance quantity of titanium satisfies 5.0<MNb / MTi≤24.0. A diffraction chart by a wide-angle X-ray diffraction method that uses a CuKα ray to the active material as an X-ray source includes: a peak A and a peak C which belong to the Nb10Ti2O29 phase; and a peak B in which 2θ appears within a range of 25.5±0.2° and which belongs to the Nb rich phase. The active material satisfies a peak intensity ratio expressed by a formula (1). (1) 0<IB / IA<5.0. A half value width of the peak C is within a range between 0.15° and 0.80°.SELECTED DRAWING: Figure 12

The invention provides a positive electrode active material, a preparation method thereof, a positive electrode plate containing the positive electrode active material, a full-tab battery cell and an electric device, and relates to the technical field of lithium ion batteries. The positive electrode active material is of a double-spherical particle structure with a glass-phase neck bridge at a contact neck part, each spherical particle comprises an active material body and a coating layer coating the active material body, and the active material body is lithium iron phosphate dispersed with Fe2P; the average thickness tsh of the coating shell layer is equal to 5 to 9 nm; the thickness tcheck of the glass phase neck bridge is 5-25nm, and the total content G of the glass phase in the positive electrode active material is 1.5-2.2 wt%; the volume average particle size of the positive electrode active material is 7-9 [mu] m. According to the positive electrode active material disclosed by the invention, through the cooperation of the coating shell layer, the embedded Fe2P nano second phase and the glass phase neck bridge, the comprehensive performance of a full-tab battery cell and an electric device can be effectively improved.

A negative electrode active material is provided. A composition is expressed by a formula AlNb11-xMxO29. 0.5<x<5 is satisfied. The M is a transition metal element with a valence of 4 or more.

The invention relates to the field of solid-state batteries, in particular to a positive electrode active material for an all-solid-state battery, a preparation method of the positive electrode active material, a composite positive electrode material for the all-solid-state battery and the all-solid-state battery. The positive electrode active material for the all-solid-state battery is secondary particles formed by aggregating strip-shaped primary particles, the length of the strip-shaped primary particles is 0.5-1 [mu] m, the diameter of the secondary particles is 3-5 [mu] m, the specific surface area is 0.3-1 m < 2 > / g, and the porosity is lt; and 10%. The positive electrode active material for the all-solid-state battery can solve the problems of physical contact failure of a solid-solid interface of a positive electrode, relatively poor structural stability of a positive electrode base material, relatively poor transmission kinetics of Li < + > in the positive electrode and the like in the prior art.