40results about "Magnesium silicates" patented technology

The application provides a negative electrode material and a preparation method thereof and a secondary battery, and relates to the technical field of battery materials. The negative electrode material comprises a silicon-based inner core and a carbon layer coated on the surface of the silicon-based inner core, wherein the silicon-based inner core comprises nanosilicon and a silicate containing a metal element M; the negative electrode material is subjected to section analysis and energy spectrum analysis, and meets the conditions of k1<=10, k2<=5 and 0.1 The preparation method of the negative electrode material comprises the following steps: heating and evaporating pre-disproportionated silicon monoxide material and M metal source material to obtain silicon monoxide gas and metal source gas; mixing and condensing the two kinds of gas to obtain an inner core material; and performing carbon coating treatment to obtain the negative electrode material. In the negative electrode material prepared by the application, the metal silicate effectively separates the nanosilicon domain and the silicon oxide domain, and is uniformly distributed, and the negative electrode material has high initial efficiency and excellent cycle performance.

The invention provides a positive electrode material and a preparation method thereof, a battery monomer, a battery device and a power utilization device. The positive electrode material comprises a sodium transition metal oxide and a silicate material located on the surface of the sodium transition metal oxide, the positive electrode material has the following chemical formula: NaxMyNzO2 / (aNa2O.nSiO2-XrOt.SiO2) b, M comprises one or more of Fe, In, Co, Mn, Ni and Cr, N comprises one or more of Cu, Li, Ti, Zr, K, Sb, Nb, Mg, Ca, Mo, Zn, W, Bi, Sr, Sn, Ga and Al, and X comprises one or more of Na, Li, K, Mg, Ca, Zn, Al, Cr, Sr, Sn and Sb; 0.58 < = x < = 1.05, 0 < y < = 1, 0 < = z < = 1, 0 < y + z < = 1, 1 / 3 < = r / t < = 2, 1 < = n / a, and 0 < b < = 0.2. The positive electrode material provided by the invention can improve the rate capability and the processability of the battery monomer.

The present invention addresses the problem of providing a novel adsorbent that has a high adsorption capacity and that is capable of adsorbing a substance to be adsorbed with a small amount of use.　The present disclosure provides an adsorbent composed of an amorphous magnesium silicate compound. The magnesium silicate compound according to the present disclosure has an alkali metal content of 1.20 mass% or less. The magnesium silicate compound according to the present disclosure has a solid acid content of 0.70 mmol / g or more.

The present application relates to a negative electrode material and a manufacturing method thereof, and to a lithium ion battery, and belongs to the technical field of energy storage materials. The negative electrode material is Li x M y The Li x M y The SiO4 material and the carbon material both form a network structure, which in the negative electrode material independently form a first skeleton and a second skeleton, respectively, and the first skeleton and the second skeleton are intertwined with each other, and the Li x M y The nanosilicon is distributed in and / or on the surface of a SiO4 material matrix, among which the Li x M y In the SiO4 material, the values ​​of x and y satisfy the charge balance, and M includes a metal element other than Li that can reduce silicon oxide. The negative electrode material has better electrical conductivity, more stable structure, lower volume expansion, higher electrical conductivity, initial efficiency and excellent multiplication performance.

The application provides a palygorskite-based magnesium silicate anthraquinone regenerative catalyst and a preparation method thereof, the chemical formula of the anthraquinone regenerative catalyst is Mg4Si6O15(OH)2·6H2O, and the preparation method comprises the following steps: (1) obtaining a palygorskite-based SiO2 precursor through hydrothermal acidification of palygorskite; (2) uniformly mixing the palygorskite-based SiO2 precursor, an ammonium salt, a magnesium salt and ammonia water through ultrasonic mixing; and (3) transferring the mixed solution to a hydrothermal kettle to generate palygorskite-based magnesium silicate through hydrothermal reaction. The application takes palygorskite as a silicon source and a template, has the advantages of wide raw material source, simple preparation process, low production cost, green environmental protection and convenience for industrialized production, etc. The palygorskite-based magnesium silicate prepared by the application can be used as a solid alkali catalyst, and has the advantages of non-toxicity, environmental protection, high catalytic activity, long service life and the like.

The present invention relates to a secondary battery electrolyte additive comprising milled magnesium silicate, a secondary battery electrolyte comprising same, and a method for producing same and, more specifically, to magnesium silicate for a secondary battery electrolyte additive which is prepared by subjecting a mixture of magnesium silicate and a methyl ethyl ketone (MEK) solvent to primary milling using a bead mill and to secondary milling using a nano mill, as well as to a secondary battery electrolyte comprising same and a method for producing same. The present invention can provide an optimal content of the secondary battery electrolyte additive for enhancing capacity retention in a secondary battery electrolyte, and can provide a method for producing nano-sized magnesium silicate capable of reducing the process time through mechanical milling.

The present invention improves at least one of initial efficiency, battery capacity, and cycle characteristics of a non-aqueous electrolyte secondary battery. A negative electrode active material for a non-aqueous electrolyte secondary battery according to one embodiment of the present invention contains porous composite particles containing silicon and a silicon oxide (SiOx, 0 < x < = 2), in which some or all of pores of the porous composite particles are filled with carbon, and some or all of surfaces of the porous composite particles are coated with carbon.

A talc particulate, a polymer composition comprising said talc particulate, methods of making said talc particulate and said polymer composition, and the various uses of said talc particulate.

The present disclosure relates to a method of treating a material comprising a mineral, which comprises subjecting the material to radiant heating, for example a high flux and rapid radiant heating. In a particular form, the mineral is a hydrous mineral.

The invention discloses a preparation method of a fullerene-containing metal wear self-repairing material for a transmission lubricating system, and relates to the technical field of lubricating materials. Comprising the following steps: (1) pretreating raw materials, and preparing artificially synthesized nano hydroxyl magnesium silicate, fullerene-nano indium composite powder and micro-nano composite hydroxyl magnesium silicate powder; (2) preparing a fullerene-indium-copper-lithium quaternary composite dispersion liquid; (3) mixing the micro-nano composite hydroxyl magnesium silicate powder and the composite dispersion liquid in the modified base oil in a gradient manner, and adding an antioxidant and an anti-settling agent; and (4) regulating the particle size to D50 = 500-800nm and the viscosity to 150-200mm / s at 40 DEG C, and carrying out vacuum degassing and packaging to obtain a finished product. According to the method, shutdown-free in-situ repair of the worn surface of the transmission system is achieved, the friction coefficient is reduced to 0.02-0.06, the hardness of the metal surface is improved by 1-2 times, and the service life of equipment is prolonged by one time or above.

The invention discloses a process for reducing moisture of talcum powder and improving yield by high-temperature compressed gas, which comprises the following steps of: A, preheating and feeding raw materials, namely starting a system, setting a target moisture value of a final product, setting an initial temperature parameter of each stage of drying unit, and adding wet talcum powder raw materials with the initial moisture content of 2-8% into the drying unit; the wet materials are continuously and stably fed into a multi-stage serial preheating conveyor (for example, the wet materials flow to the second stage from the third stage and finally enter the first stage, and the flowing direction of the hot air is opposite) through a screw feeder or a star-shaped feeding valve, and the wet materials are pre-dried by utilizing waste heat of the system. Deep coupling and synergistic interaction of drying and depolymerization are achieved, moisture is reduced from 0.7% to 0.1% under the conditions of 80 DEG C high-temperature gas and 8 MPa, the yield is increased by 35%, the processes of source high-temperature dehydration, pipeline heat preservation and precise pressure control are integrated, and the industrial pain points of high energy consumption and large moisture fluctuation of traditional rear-section drying are solved.

The present application relates to the technical field of batteries, and in particular to a negative electrode material containing a silicon-based active material and a matrix material, a method for producing the same, and a secondary battery. [Solution] The negative electrode material contains hydrogen, halogen, nitrogen, and sulfur, and the mass content of hydrogen is m H The mass content of the halogen element is m X The mass content of sulfur element is m S The mass content of nitrogen is m N When this is the case, 0.02≦m X / m H ≦5.00, 0.02≦m N / m H ≦20.00, 0.05≦m S / m H The technical solution of the present application adjusts the contents of hydrogen, nitrogen, sulfur and halogen elements within an appropriate range, thereby effectively suppressing the volume expansion of the negative electrode material and improving the capacity, initial coulombic efficiency, powder conductivity, cycle performance and rate performance of the negative electrode material.

The invention provides a preparation method and application of a pre-magnesium silicon oxide negative electrode material, belongs to the technical field of lithium ion batteries, and aims to solve the technical problems of poor initial coulombic efficiency and stability of silicon monoxide. The preparation method comprises the following steps: S1, preparing an alkoxy silane-ethanol / water solution and an alcohol-based magnesium salt-ethanol solution; s2, dropwise adding the alcohol-based magnesium salt-ethanol solution in the step S1 into the alkoxy silane-ethanol / aqueous solution in the step S1, carrying out hydrolysis-condensation chain chemical reaction on alkoxy silane, centrifuging, and drying to obtain a pre-magnesium-silicon-oxygen precursor; and S3, carrying out high-temperature calcination on the pre-magnesium silica precursor obtained in S2 in an inert atmosphere to obtain the pre-magnesium silica composite material. The pre-magnesium silicon-oxygen composite material can be used as a lithium ion battery negative electrode, can effectively improve the initial coulombic efficiency of the silicon-oxygen negative electrode, and considers the volume expansion and cyclicity of the material.

This application provides a silicon-based negative electrode active material that contains an alkali metal element-containing silicate and also contains both Mg and Mn elements.

One embodiment of the present invention relates to a porous silicon composite, a porous silicon carbon composite containing the same, and an anode active material, in which the porous silicon composite and the porous silicon carbon composite each contain both silicon particles and a magnesium compound, and have a molar ratio (O / Si) of oxygen (O) atoms to silicon (Si) atoms that satisfies a specific range, and by applying the porous silicon composite and the porous silicon carbon composite to the anode active material, it is possible to realize an excellent capacity retention rate, and to significantly improve the discharge capacity and initial efficiency.

The present invention relates to a silicon oxide composite for a lithium secondary battery anode material and a method for manufacturing same and, more specifically, to a silicon oxide composite for a lithium secondary battery anode material and a method for manufacturing same, wherein the silicon oxide composite comprises a Si cluster and MgxSiOy(0≤x≤3, 0≤y≤5) formed on a peripheral portion of the Si cluster.

A method for producing magnesium and forsythite by silicon-thermal method using magnesite resources belongs to the technical field of magnesium smelting. The method uses vacuum or relative vacuum technology, takes magnesite resources as raw materials, and uses ferrosilicon as a reducing agent. The method produces magnesium metal and separates the produced magnesium slag to obtain metal iron and high-quality magnesium-silicon forsythite, realizes high-value and full-quantitative utilization of the magnesium slag, and avoids large storage of the magnesium slag. Meanwhile, the method accurately judges the calcination endpoint based on online detection of CO2 concentration, realizes calcination-reduction integration, promotes the reaction of SiO2 and MgO in the magnesium slag to generate magnesium-silicon forsythite by adjusting the temperature and atmosphere, and can be directly used for refractory materials or building materials, thereby improving the resource utilization rate and greatly shortening the production cycle.

An anode material including a silicon-based core and a carbon layer disposed on at least part of a surface of the silicon-based core are described. The silicon-based core includes nano-silicon and a silicate containing a metal M element. The anode material is subjected to section and energy spectrum analysis, k1≤10, k2≤5, and 0.1<k2 / k1≤1 are satisfied. The method for preparing the anode material includes: heating and evaporating the pre-disproportionated silicon oxide material and M metal source material to obtain silicon oxide gas and metal source gas; mixing and condensing these two gases to obtain the core material; and performing carbon coating treatment to obtain the anode material. The metal silicate in the prepared anode material effectively separates a nano-silicon domain and a silicon oxide domain, is relatively uniform in distribution, and has high initial Coulombic efficiency and good cycle performance.

A talc particulate, a polymer composition comprising said talc particulate, methods of making said talc particulate and said polymer composition, and the various uses of said talc particulate.

This application provides a silicon-based negative electrode active material. The silicon-based negative electrode active material includes a silicate containing an alkali metal element. The silicon-based negative electrode active material contains both element S and element Mg.

The invention discloses a calcining method for preparing enstatite by using a talc ore raw material, which is characterized by comprising the following steps: pretreatment: putting black talc into a crushing device for crushing, grinding and crushing, and crushing and grading to obtain talcum powder; and calcining: putting the treated talcum powder into a bowl container, then putting the bowl container into a calcining furnace, and calcining at the calcining temperature of 900-1200 DEG C for 15-40 minutes, so as to obtain the enstatite after the calcining is finished. After the black talc is ground into powder, the surface of the black talc possibly has roughness or water caltrops, then the powdery black talc is placed in the bowl container and then calcined, it can be guaranteed that the surface can be more uniform and smoother in the firing and softening process, due to the fact that the powdery black talc is placed in the bowl container and then calcined, gaps between particles are larger, and the particle size of the black talc is larger. And after burning, the brick is not easy to stick into blocks.

This invention discloses a pre-magnesium silicon suboxide anode material and its preparation method. The method involves mixing silicon suboxide powder, halide molten salt, and a magnesium source in a specific ratio, followed by heat treatment under a slightly positive pressure inert atmosphere. The acid washing process is precisely controlled to obtain a pre-magnesium silicon suboxide anode material with Mg₂SiO₄ as the absolute main phase. This method uses a molten salt with a lower melting point and addresses the issues of excessively high pre-magnesium temperatures and molten salt volatilization under vacuum conditions, resulting in a novel anode material that exhibits superior electrochemical performance.

The purpose of the present invention is to provide: needle coke for graphite electrodes for which a huge cost is not required at the time of manufacturing, in which puffing of the needle coke is suppressed, and which improves manufacturing yield and properties of graphite electrodes; a manufacturing method thereof; and an inhibitor. This inhibitor for graphite electrode production is volatile at a temperature of 2100-6000°C and comprises: a metal comprising at least one element (Mβ) selected from the group consisting of Group 4 elements, Group 8 elements, Group 9 elements, Group 10 elements, Group 13 elements, Group 14 elements, and Group 15 elements of the long form of periodic table, and / or one oxide including the element (Mβ); or a metal comprising the element (Mβ) and / or a compound including the element (Mβ).

An anode material includes a silicon-based core and a carbon layer coated on at least part of a surface of the silicon-based core. The silicon-based core includes nano-silicon and a silicate containing a metal M element. The anode material is subjected to section and energy spectrum analysis, k1≤10, k2≤5, and 0.1<k2 / k1≤ 1 are satisfied. The method for preparing the anode material includes: heating and evaporating the pre-disproportionated silicon oxide material and M metal source material to obtain silicon oxide gas and metal source gas; mixing and condensing these two gases to obtain the core material; and performing carbon coating treatment to obtain the anode material. The metal silicate in the prepared anode material effectively separates a nano-silicon domain and a silicon oxide domain, is relatively uniform in distribution, and has high initial Coulombic efficiency and good cycle performance.

Provided is a talc powder having a B / A value of 0.10 or less wherein A (m2 / g) represents a BET specific surface area of the talc powder and B (% by mass) represents a weight loss determined by a thermogravimetry-differential thermal analysis at 200 to 700°C.

The object of the present invention is to provide a needle coke for a graphite electrode, which suppresses puffing of the needle coke and improves the production yield and performances of graphite electrodes without incurring a large cost in the production of a needle coke, and also provide a production method and an inhibitor therefor. An inhibitor for graphite electrode production, including at least one of a metal consisting of an element (Mβ) and an oxide comprising the element (Mβ), wherein the element (Mβ) is at least one element selected from the group consisting of group 4 elements, group 8 elements, group 9 elements, group 10 elements, group 13 elements, group 14 elements and group 15 elements of the long-form periodic table, or including at least one of the metal consisting of an element (Mβ) and a compound including the element (Mβ), wherein the inhibitor volatilizes at a temperature of 2100 to 6000 °C.

The application discloses a colloidal battery repairing agent and a preparation method thereof. The colloidal battery repairing agent has the characteristics of low electrolyte density, less active material falling and long service life. The colloidal battery repairing agent is prepared by using a powder and a solvent, and is configured on site. The colloidal battery repairing agent is prepared from natural magnesium-rich silicate ore, modified serpentine and 8-hydroxyquinoline (HQ). The solvent is obtained by combining nano carbon particles, N-(2-hydroxyethyl) acrylamide, sodium sulfate, potassium sulfate and deionized water. The colloidal battery repairing agent can reduce the internal resistance of the colloidal battery, and can make the colloidal battery with a nominal capacity of 50% or more meet the requirement of a nominal capacity of 80% or more after repair, so that the colloidal battery meets the qualified requirement and the service life of the colloidal battery is prolonged.

A talc particulate, a polymer composition comprising said talc particulate, methods of making said talc particulate and said polymer composition, and the various uses of said talc particulate.

The present invention improves at least one among the initial efficiency, the battery capacity, and the cycle characteristics of a non-aqueous electrolyte secondary battery. A negative electrode active material for a non-aqueous electrolyte secondary battery according to an embodiment of the present invention comprises porous composite particles containing silicon and silicon oxide (SiOx, 0 < x≤2), wherein some or all of the pores of the porous composite particles are filled with carbon, and some or all of the surfaces of the porous composite particles are coated with carbon.