120results about "Magnesium silicates" patented technology

The present invention relates to a silicon-carbon composite, a preparation method therefor, and an anode active material comprising same. The silicon-carbon composite includes silicon particles, silicon oxides, magnesium compounds, and carbon. As a molar ratio (O / Si) of oxygen (O) atoms to silicon (Si) atoms in the silicon-carbon composite satisfies 0.01 to 0.60, when the silicon-carbon composite is applied to an anode active material, the discharge capacity, initial efficiency, and capacity retention ratio after cycles of a lithium secondary battery may be simultaneously improved.

A negative active material, a method of preparing the negative active material, and a rechargeable lithium battery including the negative active material are disclosed. The negative active material may include a crystalline carbon core and a magnesium (Mg)-included coating layer on a surface of the core, wherein the Mg-included coating layer may include MgO and MgxSiOy (1≤x≤2 and 3≤y≤4).

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 element Mg and element Mn.

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 present invention relates to the technical field of antibacterial materials, and in particular to an antibacterial material comprising black talc and manganese oxide, and a preparation method thereof. The antibacterial material comprising black talc and manganese oxide loaded on its surface, wherein the manganese oxide comprises Mn3O4 and MnOOH. The antibacterial material is obtained by loading manganese oxide on the surface of the black talc using potassium permanganate, urea, and hexadecyltrimethylammonium bromide as raw materials and employing a hydrothermal reaction in-situ synthesis method. The present invention utilizes the unique layered structure of black talc and synthesizes manganese oxide on the surface of the black talc using a liquid phase in-situ synthesis method. The crystal phase and morphology of the manganese oxide are controlled by adding black talc and regulating the synthesis temperature. This material not only improves the stability of the manganese oxide, reduces aggregation, and exhibits high antibacterial properties, but also enhances its biocompatibility, exhibits low cytotoxicity and low hemolytic properties, and is suitable for various biomedical applications.

The present application provides a method for removing impurities from multi-source photovoltaic wastewater and synergistically preparing fluorine products in a cascade manner, which realizes deep removal of fluoride and recovery of fluorine resources through a three-stage treatment system. The primary treatment uses concentrated alkaline wastewater to react with magnesium salts, effectively removes silicates through flocculation and precipitation, and recovers magnesium silicate products. In the secondary treatment, silicon-containing concentrated acid wastewater reacts with barium salts to remove silicate ions and is then mixed with the primary waste liquid. After adjusting to the optimal pH, aluminum salts are added for coagulation and precipitation to recover cryolite. The tertiary treatment uses crystal seeds to induce calcium fluoride crystallization, further reducing the fluoride ion concentration to below 8 mg / L to meet wastewater discharge standards, and at the same time recovering calcium fluoride products; the entire process is simple, low-cost, and the recovered product is of high quality, in line with national standards, and has significant economic and environmental benefits. In addition, the present application realizes "waste treatment with waste", reduces wastewater treatment costs, and meets the requirements of sustainable development.

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.

To provide a novel adsorbent that has a high adsorption capacity and that is capable of adsorbing a target material with a small amount of use.SOLUTION: 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.SELECTED DRAWING: Figure 1

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 disclosure relates to methods for producing hydrogen and calcium- or magnesium-bearing carbonates by capturing, converting, and storing carbon dioxide. The methods may include providing one or more calcium- or magnesium-bearing compounds; providing one or more water-soluble oxygenates; providing a plurality of catalysts; and reacting one or more calcium- or magnesium-bearing compounds and one or more water-soluble oxygenates with plurality of catalysts under conditions to produce hydrogen and calcium- or magnesium-bearing carbonates. The methods may include providing one or more calcium- or magnesium-bearing silicates; providing carbon monoxide; providing water vapor; and reacting one or more calcium- or magnesium-bearing silicates, carbon monoxide, and water vapor. The methods may include providing one or more calcium- or magnesium-bearing compounds; providing one or more water-soluble oxygenates; providing a catalyst; and reacting one or more calcium- or magnesium-bearing compounds and one or more water-soluble oxygenates with said catalyst.

The present invention relates to films made of PVOH and phyllosilicates, which are particularly suitable for producing food packaging. The film can be used to produce a layer of a multi-layer packaging. The film can form both a gas barrier and a water barrier and can in particular provide excellent adhesion between layers.

The present invention relates to films made of PVOH and phyllosilicates, which are particularly suitable for the production of food packaging. The film can be used to produce one layer of a multilayer packaging. The film can form both a gas and a water barrier and, in particular, can provide excellent adhesion between layers.

A polyester polymer composition is disclosed containing reinforcing fibers and having improved adhesion to elastomeric materials while also being formulated for medical applications and / or food service applications. The polyester polymer composition can contain a blend of different polyester polymers and can be free of hindered phenolic antioxidants. The polyester polymer composition can be used in overmolding applications in which the composition is initially molded into a polymer component and then overmolded with an elastomeric material. The elastomeric material can contain a copolyester elastomer and can serve as a sealing member.

The present disclosure relates to a negative electrode material, a preparation method thereof, and a lithium ion battery. The negative electrode material includes an active material, the active material includes a framework structure and a silicon-oxygen material embedded in the framework structure, the framework structure includes a lithium silicate framework located inside the active material and a water-insoluble silicate framework located on the surface layer of the active material, the water-insoluble silicate framework and the lithium silicate framework are connected, and in the XRD pattern of the negative electrode material, the intensity of the strongest characteristic diffraction peak of the lithium silicate is I A and the intensity of the strongest characteristic diffraction peak of water-insoluble silicates is I B and I B / I A is 0.03≦I B / I A The negative electrode material and the preparation method thereof according to the present disclosure are simple to prepare, low-cost, and suitable for mass production. The prepared negative electrode material can improve processability, and has excellent electrochemical performance, cycle performance, and expansion inhibition performance, and can extend the service life of lithium-ion batteries.

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 invention relates to the field of anode materials for lithium-ion batteries, and discloses a preparation method of a silicon-based anode material with high capacity and high initial efficiency, comprising: (1) mixing silicon monoxide with glucose and gluconate to obtain precursor A; (2) dispersing precursor A in deionized water to dissolve glucose and gluconate in water to form a dispersion, and freeze-drying the dispersion to obtain a material to be sintered B; (3) placing the material to be sintered in an atmosphere of protective gas, heating and holding the temperature, and finally cooling to obtain a finished product of a silicon-oxygen anode material for a lithium-ion battery with high capacity and high initial efficiency. The silicon-oxygen anode material prepared by the present invention has the characteristics of high capacity and high initial efficiency. When at a voltage of 0.8V, the initial efficiency of the prepared silicon monoxide anode material reaches 85%, and the capacity is greater than 1300 mAh / g.

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 provides a negative electrode material, a manufacturing method thereof, and a secondary battery, and relates to the technical field of battery materials. The negative electrode material includes a silicon-based core and a carbon layer covering at least a portion of the surface of the silicon-based core, the silicon-based core including nanosilicon and a silicate containing a metal M element; and when the negative electrode material is cut and energy spectrum analysis is performed on the cut surface, k1≦10, k2≦5, and k3≦0.1

The invention discloses a method for converting red mud into mineral resources for use, which realizes efficient extraction of FeO, AlO and TiO in the red mud and recycling of NaOH through an acid leaching-alkali precipitation-membrane separation process. The method specifically comprises the following steps: leaching red mud by using dilute sulfuric acid, precipitating metal hydroxides step by step, regenerating NaOH through electrodialysis, extracting TiO by using concentrated sulfuric acid through acidolysis, and finally performing innocent treatment on residues. The method has the advantages of high resource recovery rate, low cost, environmental friendliness and the like, and is suitable for large-scale resource utilization of the red mud.

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 negative electrode material and a preparation method therefor, and a secondary battery, relating to the technical field of battery materials. The negative electrode material comprises: a silicon-based core; and a carbon layer coated on at least part of the surface of the silicon-based core, the silicon-based core comprising nano-silicon, and silicate containing a metal element M; the negative electrode material is sectioned and subjected to energy spectrum analysis, k1 is less than or equal to 10, k2 is less than or equal to 5, and k2 / k1 is greater than 0.1 and less than or equal to 1. The preparation method for the negative electrode material comprises: heating and evaporating a pre-disproportionated silicon monoxide material and an M metal source material, to obtain a silicon monoxide gas and a metal source gas; mixing the two gases, and performing condensation to obtain a core material; and performing carbon coating treatment, to obtain a negative electrode material. Metal silicate in the prepared negative electrode material effectively separates a nano silicon domain and a silicon oxide domain, and is uniformly distributed; thus, the negative electrode material has high first-time efficiency and excellent 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.

The invention discloses a method for preparing a novel broadband wave-absorbing material from ferro-nickel alloy ore heat furnace slag, and belongs to the technical field of preparation of novel wave-absorbing materials. According to the method, the ferro-nickel alloy submerged arc furnace slag with high chemical stability and a magnesium silicate solid solution as a main component is used as a raw material, chemical treatment and preliminary surface construction are performed through hydrofluoric acid, and meanwhile elements with good wave absorbing performance, such as iron, chromium, manganese and nickel, contained in the submerged arc furnace slag are released into the solution in a free-state ion form; different alkaline reagents (ammonia water, a sodium hydroxide solution, a calcium hydroxide solution or a sodium silicate solution) are selected to enrich the free-state ion elements with the good wave-absorbing performance, and the selected different alkaline reagents are used for carrying out secondary microscopic construction on the submerged arc furnace slag, so that the preparation method of the novel broadband wave-absorbing material is provided.

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 provides a negative electrode material, 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 nano silicon and silicate containing a metal M element; tangent plane and energy spectrum analysis is carried out on the negative electrode material, k1 < = 10, k2 < = 5, and 0.1 < k2 / k1 < = 1. The preparation method of the negative electrode material comprises the following steps: heating and evaporating a pre-disproportionated silicon monoxide material and an M metal source material to obtain silicon monoxide gas and metal source gas; mixing the two gases, and condensing to obtain an inner core material; and then carrying out carbon coating treatment to obtain the negative electrode material. In the prepared negative electrode material, the metal silicate effectively separates a nano silicon domain and a silicon oxide domain, the distribution is relatively uniform, and the negative electrode material has high first efficiency and excellent cycle performance.

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 present invention discloses a method for increasing the whiteness of talc by low-temperature calcination. Low-whiteness talc with a particle size of ≤2 mm is mixed with a calcination additive and pulverized to a particle size of ≤0.045 mm to obtain a mixed ore sample. The mixed ore sample is subjected to calcination treatment in a weakly reducing atmosphere, with a calcination temperature of 500-600 °C and a time of 10-60 min. After cooling to room temperature, acid leaching, multi-stage magnetic separation, filtration, and drying are carried out to obtain the finished talc powder. The method of the present invention overcomes the drawbacks such as high calcination temperature and long calcination time in the process of increasing the whiteness of low-whiteness and low-grade talc, and has the advantages of low energy consumption, environmental friendliness, simple operation, and low cost. It can significantly improve the whiteness of talc powder on the premise of maximizing the preservation of the talc phase, and has good economic and social benefits.

The invention belongs to the technical field of novel thermal insulation materials, and particularly relates to a preparation method of a magnesium silicate compound for a thermal insulation material, which comprises the following steps: S1, preparing water glass, sulfuric acid and a magnesium salt solution; s2, adding a magnesium salt solution, a part of the water glass solution and water into a reaction kettle, and then adding sulfuric acid to form a silicon-magnesium sol compound; s3, aging and stirring the silicon-magnesium sol compound, pressurizing and heating to adjust the pH value, adding the residual water glass, sulfuric acid and an amino silane coupling agent, carrying out aging reaction, adjusting the pH value, and aging to form a silicon-magnesium compound; and S4, washing, drying and carrying out jet milling. The magnesium silicate compound for the thermal insulation material has good comprehensive application performance in the thermal insulation aspect, the synthesis process is simple, the production cost is low, and large-scale industrial application is easy.