184results about "Borates" patented technology

The invention discloses an oxide-coated ion-doped sodium ferric sulfate positive electrode material as well as a preparation method and application thereof. The positive electrode material is formed by compounding a sodium ferric sulfate bulk phase material doped with various valence metal cations and anions and coated with carbon similar to a positive temperature coefficient thermosensitive metal oxide. Wherein the metal cations with various valence states are doped on Na or Na / Fe ion sites of the sodium ferric sulfate, the doped anions occupy part of three-dimensional S-O tetrahedron positions, the inorganic carbon in the carbon compound is uniformly distributed in the sodium ferric sulfate bulk phase material, and the organic carbon is uniformly distributed outside the sodium ferric sulfate bulk phase material. The positive electrode plate assembled battery prepared from the positive electrode material has the advantages of high reversible charge-discharge capacity, excellent cycle performance and rate capability and high electron and ion migration rate in a low-temperature environment. The method is low in raw material cost, simple in synthesis method, short in production period and suitable for large-scale continuous production.

The invention provides a polycrystalline ultrahigh-nickel ternary positive electrode material and a preparation method thereof, a lithium ion battery and electric equipment, and relates to the field of lithium ion batteries. The polycrystalline ultrahigh-nickel ternary positive electrode material comprises an inner core, a first coating layer and a second coating layer, the chemical general formula of the inner core is LiNiXMyM 'ZO2; m comprises at least two of Co, Mn and Al, and M'comprises at least two of Zr, Sr, Y, Sb, Al, W, Ta, Mg, Ca, Ti, Mo and Nb; the first coating layer comprises a lithium-M ''multi-element oxidation compound, and M'' comprises at least two of Sb, Al, Co, Ti, W and P; the second cladding layer includes a lithium-M ''oxidation complex, and M'' includes one or more of B, Al, W, and Ti. The polycrystalline ultrahigh-nickel ternary positive electrode material has excellent high-temperature storage performance and capacity.

A particulate nanocomposite material comprising, as determined by X-ray diffraction (XRD): elemental carbon (C); elemental nickel (Ni) in a cubic crystalline phase; a cubic nickel oxide (NiO) crystalline phase; an orthorhombic calcium borate (CaB2O4) crystalline phase; and, a magnesium borate (MgB2O4) crystalline phase. The porous particulate nanocomposite is characterized in that, based on the total number of atoms in the particulate nanocomposite material: the atomic concentration of carbon is from about 1 atomic percent (at. %) to about 10 at. %; the atomic concentration of nickel is from about 1 at. % to about 10 at. %; the atomic concentration of boron (B) is from about 1 at. % to about 10 at. %; the atomic concentration of magnesium (Mg) is from about 5 at. % to about 15 at. %; and, the atomic concentration of calcium (Ca) is from about 1 at. % to about 10 at. %.

The invention relates to the technical field of graphene modification, and particularly discloses a preparation method of zinc borate modified graphene, which comprises the following steps: ultrasonically dispersing graphene in water to obtain 0.5-1g / L graphene dispersion liquid; adding a dispersing agent, a 0.08-0.12 mol / L borax aqueous solution and ethanol into the graphene dispersion liquid, uniformly mixing, and then dropwise adding a 0.08-0.12 mol / L zinc sulfate aqueous solution under the stirring action; then carrying out a reaction through microwave heating at the temperature of 50-70 DEG C under the power of 100-300 W for 20-30 min; after the reaction is finished, filtering, washing and drying to obtain zinc borate modified graphene. According to the preparation method of the zinc borate modified graphene, provided by the invention, a uniform, complete and compact shell layer can be formed on the surface of the graphene through in-situ self-assembly, so that the surface of the graphene is textured, and the dispersion uniformity and dispersion stability of the graphene in an oil phase system are improved.

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.

This invention discloses a core-shell structured lithium-rich manganese-based cathode material with the general formula Li. 1+a Mn x Co y Ni z O 2‑b‑d (XO c ) b X d It has a core-shell structure, with the core being a disordered polyanion-doped lithium-rich manganese-based material, Li. 1+a Mn x Co y Ni z O 2‑b (XO c ) b The outer shell is made of lithium-rich manganese-based material Li, which is doped with gradient non-metallic ions. 1+ a Mn x Co y Ni z O 2‑d X d This application also provides a method for preparing a core-shell structured lithium-rich manganese-based cathode material. The method employs a combination of rapid Joule heating and surface plasma cleaning to prepare the aforementioned core-shell structured lithium-rich manganese-based cathode material, achieving a bulk disordered structure design with polyanion doping and a core-shell structure with surface gradient non-metallic ion doping. Specifically, the bulk polyanions can immobilize transition metal elements to suppress their migration to the lithium layer, reducing harmful consumption of active sites and stabilizing the crystal structure. Furthermore, the strong bond energy between the surface non-metallic elements and the transition metal elements can suppress transition metal dissolution during cycling, reducing irreversible oxygen oxidation and inhibiting harmful phase transitions.

The invention provides a coated microcrystal lithium-rich manganese-based positive electrode material as well as a preparation method and application thereof. The positive electrode material is a lithium-rich manganese-based positive electrode material which is prepared from a lithium-rich manganese-based precursor and has primary particles formed in situ and secondary spheres with surface coatings. The positive electrode material has a unique core-shell structure, the core is a microcrystal lithium-rich material, the shell is a nanoscale solid electrolyte layer, and the shell layer coats primary particles and secondary spheres at the same time; the structure effectively inhibits the interface side reaction between the positive electrode material and the solid electrolyte, and stabilizes the interface structure; a continuous and short Li and charge transmission path is provided, the interface impedance in an all-solid-state battery is remarkably reduced, and the rate capability and the cycling stability of the material are improved.

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 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 particulate nanocomposite material comprising, as determined by X-ray diffraction (XRD): elemental carbon (C); elemental nickel (Ni) in a cubic crystalline phase; a cubic nickel oxide (NiO) crystalline phase; an orthorhombic calcium borate (CaB2O4) crystalline phase; and, a magnesium borate (MgB2O4) crystalline phase. The particulate nanocomposite material is characterized in that, based on the total number of atoms in the nanocomposite material: the atomic concentration of carbon is from about 1 atomic percent (at. %) to about 10 at. %; the atomic concentration of nickel is from about 1 at. % to about 10 at. %; the atomic concentration of boron (B) is from about 1 at. % to about 10 at. %; the atomic concentration of magnesium (Mg) is from about 5 at. % to about 15 at. %; and, the atomic concentration of calcium (Ca) is from about 1 at. % to about 10 at. %.

The invention discloses a positive electrode material and a preparation method and application thereof and belongs to the technical field of positive electrode materials. The positive electrode material disclosed by the invention comprises a positive electrode active substance, wherein the positive electrode active substance comprises xNa < 3.64-a > Fe < 2.64-a > Ma (PO4) < 1.64-b > (BO3) P2O7. YNa < 4-2c > Fe < 2 + c > (P2O7) 2; in the formula, Na < 3.64-a > Fe < 2.64-a > Ma (PO4) < 1.64-b > (BO3) P2O7 is an NFPP superlattice solid solution phase; m comprises one or more of La, Ce and Mo, x is more than or equal to 80 wt% and less than or equal to 100 wt%, y is more than or equal to 0 wt% and less than or equal to 20 wt%, and 0 lt; a is less than 0.1, 0lt; blt; 0 < = c < = 1, and x + y = 100 wt%. The capacity and the working voltage of the positive electrode material are remarkably improved.

The present invention relates to a rubidium fluoro-scandium borate compound, a rubidium fluoro-scandium borate nonlinear optical crystal, and a preparation method and application thereof. The rubidium fluoro-scandium borate compound has a chemical formula Rb2ScB3O6F2, does not contain a symmetry center and has a molecular weight of 382.33 g / mol. The rubidium fluoro-scandium borate nonlinear optical crystal belongs to the monoclinic crystal system, and belongs to the non-centrosymmetric space group P21, and the unit cell parameters are: a=4.0372(10) Å, b=11.800(3) Å, c=8.823(2) Å, α=γ=90°, β=98.327(11)°, Z=2. The present invention adopts a high-temperature vacuum packaging method or a solid-state synthesis method to prepare rubidium fluoro-scandium borate compounds. The present invention adopts a fluxing agent method to prepare a rubidium fluoro-scandium borate nonlinear optical crystal, which have the advantages of short absorption cutoff edge, large nonlinear optical effect, good thermal stability, and stable physical and chemical properties. The rubidium fluoro-scandium borate nonlinear optical crystal of the present invention can be used to fabricate nonlinear optical devices, which have important applications in fields such as optics, military, laser lithography, and communication, etc.

The invention provides a single-crystallized and coating-modified lithium-rich manganese-based material as well as a preparation method and application thereof, the preparation method comprises the following steps: carrying out ball-milling mixing on a cobalt-free carbonate precursor material, a lithium source and molten salt, and then carrying out primary calcination, washing and repair heat treatment to obtain a single-crystal cobalt-free positive electrode material; the method comprises the following steps: mixing a single-crystal cobalt-free positive electrode material with a boron source solution, carrying out first coating to obtain a mixture, adding a magnesium source solution into the mixture, carrying out second coating, carrying out solid-liquid separation after coating, washing, drying and carrying out secondary calcination to obtain a gradient coating layer on the surface of the single-crystal cobalt-free positive electrode material, and one side far away from the single-crystal cobalt-free positive electrode material is rich in magnesium. The cobalt-free lithium-rich manganese-based positive electrode material is modified through single crystallization and coating synergistically, so that the problems of structural distortion, poor cycling stability, capacity fading and the like of the lithium-rich manganese-based material are solved, and the electrochemical performance of the lithium-rich manganese-based material is improved synergistically.

The invention discloses a ternary material precursor, a ternary material and a preparation method, and belongs to the field of lithium ion battery positive electrode materials. The ternary material precursor is of a multi-layer composite structure and sequentially comprises a core layer, a first transition layer and a second transition layer from inside to outside, and all the layers are prepared by adopting the same ternary (nickel-cobalt-aluminum) system. Through reasonable design of the proportion and thickness of the ternary system of the core layer and the transition layer, the ternary material precursor gives consideration to the high-capacity characteristic of the high-nickel core and the stability of the shell, and the stable structure of the shell can effectively inhibit the structural change and interface side reaction of the high-nickel material in the charging and discharging process. The phenomena of particle cracking and shell layer falling are reduced, and the material shows excellent specific discharge capacity, good cycle performance and thermal stability when being used as a lithium ion battery positive electrode material.

The mixed powder is a mixed powder for an annealing separator containing MgO as a main agent, wherein the mixed powder contains Al and B, an Al content contained in the entire mixed powder is 0.0007 mass% or more and 0.050 mass% or less, a B content contained in the entire mixed powder is 0.005 mass% or more and 0.040 mass% or less, the B contains tri-coordinated boron, an average particle size of the mixed powder is 0.08 µm or more and 9.0 µm or less, and a formula (1) below is satisfied. 0.06≤Al / BO3<5.00 In the formula (1), [Al] is an Al content (mass%) in the mixed powder, and [BO3] is a content (mass%) of the tri-coordinated boron in the mixed powder.

The embodiment of the invention provides a positive active material and a preparation method thereof, a positive plate, a battery, a battery pack and electric equipment. The positive electrode active material comprises a spherical or sphere-like central particle and a plurality of synapse structures protruding out of the surface of the central particle, and any two synapses form a groove structure on at least part of the surface of the central particle; the positive electrode active material comprises an element M, and the element M comprises one or more of B, Zr, Sr, Mo and W. The positive electrode active material provided by the embodiment of the invention can improve the ion conduction capability and the pole piece stability of the battery, thereby improving the rate capability and the capacity retention rate of the solid-state battery.

The invention discloses a rare earth modified silicone rubber anti-radiation adhesive and a preparation method thereof, and the rare earth modified silicone rubber anti-radiation adhesive is prepared by mixing dealcoholized single-component room temperature vulcanized silicone rubber and an anti-radiation rare earth compound according to a ratio of 92-98 wt%: 2-8 wt%, the anti-radiation rare earth compound is prepared by mixing a mixed rare earth compound, deionized water and a composite rare earth coupling agent according to the mass ratio of 10: 90: 0.08, and the mixed rare earth compound is prepared by reacting raw materials including gadolinium chloride, samarium chloride, europium chloride, boric acid and deionized water. The neutron relative attenuation rate of the adhesive can reach 71-85%, the gamma ray relative attenuation rate of the adhesive can reach 88-95%, only microcracks appear on the surface after radiation, and the adhesive is easy to construct, can be used for aerospace circuit boards, equipment circuit boards in nuclear energy facilities and parts needing anti-radiation protection and the like, and has good practicability and popularization value.

The invention provides a comprehensive recovery method of lithium-aluminum-silicon-boron-magnesium glass, which comprises the following steps: (1) crushing waste lithium-aluminum-silicon-boron-magnesium glass, slurrying, heating and carrying out acid leaching treatment to obtain silicon slag and an acid leaching solution, and carrying out membrane separation and concentration treatment on the acid leaching solution to obtain a concentrated solution; performing solid-liquid separation to obtain a lithium-boron-containing fresh water solution and an aluminum-magnesium-containing concentrated water solution; (2) mixing the lithium-boron-containing fresh water solution with a phosphorus source to carry out lithium precipitation reaction, carrying out solid-liquid separation to obtain lithium precipitation mother liquor and lithium phosphate, mixing the lithium precipitation mother liquor with a magnesium source to carry out boron precipitation reaction, and carrying out solid-liquid separation to obtain magnesium borate and wastewater; and (3) carrying out concentration crystallization treatment on the concentrated aqueous solution containing aluminum and magnesium to obtain aluminum salt crystals and crystallization mother liquor, carrying out magnesium precipitation treatment on the crystallization mother liquor, and carrying out solid-liquid separation to obtain magnesium hydroxide. According to the method disclosed by the invention, efficient and comprehensive recovery of metal elements in the lithium aluminum silicon boron magnesium glass is realized.

The invention provides a preparation process of a ceramic zinc borate flame retardant, and relates to the technical field of preparation of zinc borate flame retardants. The preparation process of the ceramic zinc borate flame retardant comprises the following steps: step 1, mixing boric acid and water according to a mass ratio of 1: (1.6-1.9), heating a preparation device to 70 DEG C, adding fatty alcohol-polyoxyethylene ether, and stirring until the fatty alcohol-polyoxyethylene ether is completely dissolved; 2, mixing zinc oxide and boric acid according to the mass ratio of 1: (4-5), stirring for 6-7 hours at the constant temperature of 70-85 DEG C, and then filtering and drying to obtain a zinc borate flame retardant; and 3, mixing the zinc borate flame retardant and the sodium sulfonate modified silane according to a mass ratio of 4: (0.6-1.2), and mechanically grinding to obtain the ceramic zinc borate flame retardant. The zinc borate flame retardant is uniformly mixed during preparation, does not settle and is thorough in reaction.

The present invention relates to the field of lithium-ion batteries, and discloses a cathode material, a method for manufacturing the same, and a lithium-ion battery. The cathode material is Li 1+a (Ni x Co y Mn z G b )T c O2, where 0.02 ≦ a ≦ 0.1, 0.6 ≦ x ≦ 1, 0 < y ≦ 0.5, 0 < z ≦ 0.5, 0 < b ≦ 0.02, 0 < c ≦ 0.02, and at 45 °C, the (003) characteristic peak around 80 cycles satisfies the relationship of 0° ≦ ΔP = P 前 -P 後 ≦ 0.2°. The cathode material has high particle strength and further excellent crystal structure stability, and the cycle performance of the cathode material is significantly improved.

The invention relates to the technical field of lithium ion battery positive electrode materials, in particular to an aluminum-yttrium-boric acid coated high-nickel positive electrode material and a preparation method and application thereof. The preparation method of the material comprises the following steps: synthesizing a doped and modified high-nickel ternary precursor from a mixed metal salt solution and a first aluminum source and / or a first yttrium source through a coprecipitation reaction; mixing the precursor with a lithium source, and performing first sintering treatment to obtain a base material; and mixing the base material with a solution containing boric acid, a second aluminum source and a second yttrium source, and carrying out solvent evaporation and second sintering treatment to obtain a final product. Through the synergistic effect of bulk phase doping and surface composite coating, generation of intragranular cracks and interface side reaction of the material in the circulation process are inhibited at the same time. The obtained positive electrode material successfully overcomes the technical problem that high capacity and long service life are difficult to consider at the same time, and the cycling stability is remarkably improved while the high specific capacity is kept.

This invention belongs to the field of magnetic refrigeration technology, specifically relating to the application of a hexagonal crystal material Sr6GdSc(BO3)6 in ultra-low temperature magnetic refrigeration. This hexagonal crystal material Sr6GdSc(BO3)6 does not undergo a phase transition at temperatures above 100 mK and exhibits a large magnetocaloric effect near 1 K. The maximum magnetic entropy changes under magnetic field variations of 0–1 T, 0–2 T, and 0–3 T are 39.36 mJ·cm⁻¹, respectively. ‑3 · K ‑1 Or 9.01 J·kg ‑1 ·K ‑1 53.95 mJ·cm ‑3 ·K ‑1 Or 12.34 J·kg ‑1 ·K ‑1 and 59.49 mJ·cm ‑3 ·K ‑1 Or 13.61 J·kg ‑1 ·K ‑1 The hexagonal crystal material Sr6GdSc(BO3)6 of this invention exhibits significant magnetocaloric effects and superior low-temperature performance, and has great application prospects in the field of ultra-low temperature magnetic refrigeration technology.

The present invention generally discloses a metalloid metal oxide coating composition of Formula (I) for the alkali mixed metal oxide based battery cathode. The coating of said composition reduces reaction based degradation of the cathode as well as electrolyte, thereby improving performance, cycle life, and rate capacity of the battery. The present invention further relates to a method of preparing the coated cathode active material and process thereof.

The application provides a high-nickel positive electrode material and a preparation method and application thereof. The high-nickel positive electrode material is a secondary particle formed by primary grains gathering, and a crystal boundary is included between adjacent primary grains; the mass ratio of cobalt elements to nickel elements at the crystal boundary of a surface layer of the secondary particle is A, the mass ratio of cobalt elements to nickel elements at the crystal boundary of a core of the secondary particle is B, and the mass ratio of cobalt elements to nickel elements of a primary grain of the surface layer of the secondary particle is C, wherein A is greater than B, and A is greater than C. The high-nickel positive electrode material has a secondary particle surface layer crystal boundary cobalt-rich structure, can enhance the structural stability of the material, reduces the side reaction between the material and an electrolyte, and thus makes the battery have excellent discharge capacity, coulomb efficiency and capacity retention rate.

One or more methods are described for extracting boron. The one or more methods include combining a combination comprising an alcohol, an organic solvent and boron, with an aqueous solution comprising an alkali hydroxide so as to form an organic layer and an aqueous layer. The aqueous layer may be separated from the organic layer.

The present invention provides a sodium battery positive electrode material, the chemical formula of the sodium battery positive electrode material is xNaMBO3.yNa2Ti3O7.zNa3V2(BO3)3 / C, where the molar ratio of x, y and z is 0.94-0.96:0.02-0.03:0.02-0.03, M is Fe and Mn, the molar ratio of Fe and Mn is 8-9:1-2, and the mass fraction of carbon in the sodium battery positive electrode material is 1.2%-1.5%. The sodium battery positive electrode material provided by the present invention has high capacity, high voltage platform, stable structure, high cycle performance, and its manufacturing method is simple, low cost, and short process flow.

Provided are a pure inorganic stimuli-responsive sol, a preparation method therefor, and a use thereof. The sol comprises an inorganic one-dimensional nanomaterial and a solution for dispersing the inorganic one-dimensional nanomaterial. The inorganic one-dimensional nanomaterial at least comprises a rare earth metal element, and the positive charge of the rare earth metal element causes the inorganic one-dimensional nanomaterials to repel each other to form the sol. The preparation method comprises: step (1). adding an inducer to a metal salt solution while stirring to form a uniform liquid; step (2). adding a liquid to a reaction kettle for reaction; and step (3). controlling the environmental hydroxyl concentration to obtain a sol product. Further provided is a method for the stimuli-responsive conversion of a pure inorganic stimuli-responsive sol into a gel, a method for the conversion of a pure inorganic stimuli-responsive gel into a pure inorganic stimuli-responsive sol, and a use thereof in sterilization, hemostasis, wound recovery, drug carriers, medical auxiliary materials, cosmetic materials, or sunscreen products. The method has low cost, can achieve the adjustment of the interaction between one-dimensional inorganic nanomaterials without the need to replace ligands, and has extremely high advantages in stimuli-responsive sol-gel conversion capacity.

The present invention belongs to the field of electrocatalysis technology, and specifically relates to a hollow nano-spherical copper borate material and its preparation method and application. The present invention forms a hollow structure by self-assembly of two-dimensional nanosheets, with a specific surface area of ​​20-100 m 2 / g, with a total pore volume of 0.3~0.6 cm 3 / g; the particle size of the hollow nanosphere particles is 5~8μm, which significantly increases the specific surface area and the exposure of active sites, solves the defects of the existing preparation method, and the application of the prepared hollow nanosphere copper borate material in the electroreduction of furfural has achieved a breakthrough in the electrocatalytic performance of copper borate materials, with the advantages of high conversion rate, high selectivity and high stability, providing a new catalyst option for the green preparation of furfuryl alcohol and has important industrial application value.

This invention provides a silicon-based anode composite material, its preparation method, and its application. The silicon-based anode composite material comprises a silicon-based core, a boronoxy lattice stabilizer, and an inert material. At least a portion of the boronoxy lattice stabilizer is embedded in the lattice structure of the silicon-based core, and the inert material coats the surface of the silicon-based core. This invention helps improve the initial coulombic efficiency and cycle performance of the silicon-based anode composite material.