834 results about "Energy materials" patented technology

The invention belongs to energy materials, particularly relating to a method for preparing nanometer ferrous phosphate lithium /carbon composite material. In the invention, ferrous source, lithium source, phosphorus source are mixed with a small quantity of doped metal salt and organic macromolecular polymer carbon source according to certain ratio followed by the steps of ball milling, parching and calcining. High temperature sintering is carried out on the above mixture in the atmosphere of non-oxidation gas to obtain nanometer lithium iron phosphate LiMxFe(1-x)PO4/C coated with carbon and LiFe(1-x)NxPO4/C material, and the particle sizes of which are remarkably reduced and are less than 100nm. When the material is applied to battery assemble, 0.2C multiplying power discharge capacity can reach above 160mAh/g at room temperature, 1C multiplying power discharge capacity can be 140-155mAh/g, and 5C multiplying power discharge capacity is 130-150mAh/g. the initial capacity is 120-140mAh/g under the large multiplying power of 10C, and remains more than 90% through thousands of cycles, demonstrating good multiplying power and cycle properties. The invention features low cost, simple production process and fine safety. The prepared nanometer ferrous phosphate lithium /carbon composite material can be widely applied into manufacturing of convenient and fast equipment, electric vehicles and the like.

This invention discloses a high-density ball ferric phosphate lithium and manganous phosphate iron lithium process method used in lithium ion battery positive electrode material in energy material process technique field. The process method comprises the following steps: to use ferric persulfate, phosphor or complex builder or manganese sulfate to process the mixture liquid; to react with the hartshorn solution to generate ball ferrous phosphate ammonium or manganese phosphate ferrous front driver; to mix it with lithium carbonate with mole proportion of one to one after washing and drying; under protection of nitrogen gas and after 600 to 900 degrees for 8 to 48 hours to get the ferric phosphate lithium or manganese phosphate ferrous.

The invention discloses a cathode material of a lithium ion battery, a preparation method of the cathode, and the lithium ion battery using the cathode material, belonging to the technical field of energy material. According to the invention, a chemical dispersant is added into the cathode of an aqueous lithium-ion battery, thereby solving problems of uniform dispersion for active materials of positive electrode and a nano-carbon mixed conductive agent; and a mechanical dispersion method is combined, preferably with a revolution speed of the mechanical dispersion being 15-35 HZ and a rotation speed being 10-30 HZ, thereby realizing uniform dispersion of the nano-active substances in a relatively short time. The cathode material of a lithium ion battery and the preparation method provide technical approach for solving uniform dispersion of the aqueous nano-active substances, and are high in production efficiency and low in cost; the prepared battery is high in discharge capacity, and is significantly improved in low temperature, multiplying power and cycling performances; and a new approach is provided for a large scale application of the nanometer lithium batteries which are limited to a high cost and a high-polluting oil system in the field.

The invention relates to an ultraviolet-curable high temperature resistant pressure-sensitive adhesive. The ultraviolet-curable high temperature resistant pressure-sensitive adhesive comprises: a solvent-free ultraviolet-curable prepolymer comprising 80-98wt% of a soft monomer and 2-20wt% of a hard monomer; one or more functional monomers comprising monofunctional monomers, bifunctional monomers or multi-functional monomers; one or more organosilicone having reactive groups or acrylates grafted by the organosilicone having reactive groups; and photoinitiators comprising a free radical cracking type photoinitiator, a hydride abstraction type photoinitiator and an ion type photoinitiator. The whole preparation process of the pressure-sensitive adhesive does not use any volatile organic solvents and is environmentally-friendly; a pressure-sensitive adhesive tape using the pressure-sensitive adhesive has a good high temperature shear resistance, has a high peeling strength on low-surface-energy materials, has a one-piece structure, and can be processed to prepare thick products without inner liner base materials.

The invention relates to a resource processing method for oily sludge. First, the oily sludge is sent to a closed retorting cracking furnace to be pyrolyzed, and the pyrolyzed period is 1-5 hours under 200-600 DEG C, then the oil, gas, and water are recovered. Second, sulfate or hydrochloride is put into the pyrobitumen of sludge containing inorganic aluminum salt or iron salt flocculant according to the chemical equivalent of the aluminum salt or iron salt 1 to 1-1.5 to do acid-soluble processing. The products after the two processes can be reclaimed and used as the flocculant of the sewage processing system, or reclaimed as the concentrating agent of sludge. The pyrobitumen containing mostly clay mineral can be used as decolorizing and absorbing material of waste water and oil, or used as absorbent for lube-oil complementing and refining process. The method used in oilfield gathering transportation and treatment system can realize zero discharge in course of the gathering transportation and treatment, and can effectively solve the pollution problem of the oily sludge and find the automate answer for the oily sludge. Meanwhile, by adopting the method, the cost for the treatment of sewage flocculation and for adding sludge concentration agent can be reduced and the energy material can be reclaimed from sludge and the wastage of oil can be reduced.

The invention relates to a preparation method of 5V level anode material of a lithium ion battery, namely, ball LiNi0.5Mn1.5O4, and pertains to the energy material and novel material preparation technology field. The method includes the steps that: a liquid mixture of manganese salt and nickel salt which is prepared according to a molar ration of 3:1, reacts with dissoluble carbonate or bicarbonate water solution and ammonia or ethylene diamine water solution to obtain ball MnCO3-NiCO3, processes of centrifugal separation, washing and drying are carried out, ball Mn2O3-Ni2O3 powder is obtained by heat treatment at 400 DEG C to 600 DEG C, the ball Mn2O3-Ni2O3 powder is mixed with lithium salt compound, ball LiNi0.5Mn1.5O4 is obtained by heat treatment at 700 DEG C to 900 DEG C. The LiNi0.5Mn1.5O4 anode material obtained by the method has high purity and relatively high specific capacity; the product grain is a ball shape, with high tap density which can reach 2.2 to 2.5 g question mark cm <-3>; the ball grain can provide a beneficial condition to the further carrying out of surface coating and to the improvement of the cycle stability of the material, and has great practical value in the field of high energy density and high power lithium ion battery.

The invention relates to a method for preparing uniformly dispersed spherical lithium iron phosphate-an anode material for a lithium ion battery, and belongs to the field of green energy materials. The method comprises the following steps: firstly, preparing a spherical iron phosphate precursor through liquid-phase homogeneous precipitation; secondly, performing predecomposition on the spherical iron phosphate precursor at a temperature of between 350 and 450 DEG C for 2 to 8 hours under the protection of inert gas; and thirdly, performing reaction at the temperature of between 550 and 800 DEG C for 2 to 24 hours to obtain the uniformly dispersed spherical lithium iron phosphate. The particle diameter of the product is between 100 and 200 nanometers, the tap density is between 1.6 and 2.0 g/cm, and the specific capacity of initial discharge at the room temperature reaches 140 to 160 mAh/g. The method utilizes a liquid-phase spheroidization process to prepare the uniformly dispersed spherical lithium iron phosphate, has simple process, and is easy to realize industrialized production.

The present invention belongs to energy material, and in particular relates to a method of using high-activity disordered iron phosphate to prepare ferrous phosphate lithium/carbon composite material. A ferrous iron source is mixed with phosphorus source solution according to stoichiometric ratio, has hydrogen peroxide added in, has pH value controlled and is stirred so as to prepare high-activity disordered iron phosphate. iron phosphate, a lithium source and a carbon source are mixed pro rata, ball-milled uniformly, spray-dried and treated via high temperature under protective atmosphere, so as to obtain high specific capacity ferrous phosphate lithium/carbon composite material of which the average particle diameter is 200-500nm, 0.25C rate specific discharge capacity reaches 145-150mAh/g, 1C rate specific discharge capacity reaches 130-140mAh/g, and 5C rate specific discharge capacity reaches 105-110mAh/g. The method is low in cost and simple in process. Prepared material is good in electrochemical performance and especially excellent in rate performance, which is applicable to battery anode material of electric vehicles and other large-scale mobile devices.

The invention discloses nitrogen-doped porous carbon and a preparation method as well as application of the nitrogen-doped porous carbon to a super-capacitor electrode material and belongs to the technical field of energy source materials and application. The nitrogen-doped porous carbon is prepared by taking natural waste products, namely peanut shells, as raw materials through steps of carrying out ball milling, sieving, carrying out high-temperature activation and washing. The nitrogen-doped porous carbon prepared by the invention has graded pores including micro-pores and medium pores; a main pore diameter range is 2nm to 5nm, the specific surface area is 1000 square meters per gram to 1200 square meters per gram, the nitrogen mass ratio is 8 percent to 10 percent and the mass specific capacitance is 290 Faraday per gram to 310 Faraday per gram; the mass energy density of a nitrogen-doped porous carbon based super-capacitor prepared from the nitrogen-doped porous carbon is 40 watt-hour per kilogram to 43 watt-hour per kilogram; the nitrogen-doped porous carbon has excellent circulating stability so that the nitrogen-doped porous carbon can be better applied to the field of super-capacitor electrodes.

The invention discloses a Ni-Mn layered double hydroxide@nickel foam@carbon three-dimensional hierarchically-structured electrode material and a preparation method thereof. The preparation method comprises the following steps: firstly carrying out one-step hydrothermal treatment by respectively taking nickel chloride hexahydrate, anhydrous manganese chloride and nickel foam as a nickel source, a manganese source and a substrate, so as to obtain Ni-Mn LDH@NF; and coating Ni-Mn LDH@NF by virtue of glucose or graphene as a carbon source, and carrying out hydrothermal treatment, so as to obtain Ni-Mn LDH@NF@C. According to the preparation method, by virtue of a stepwise hydrothermal-drying method, the preparation process and the required equipment are simple, raw material sources are rich, the reaction temperature is relatively low, the high temperature carbonization is not needed, and the large-scale production is easy to realize; and the Ni-Mn LDH@NF@C composite material is good in thermal stability, high in crystalline degree, large in specific surface area and strong in shape controllability and is one of ideal energy source materials.

The present invention is microwave synthesis process of high density spherical lithium ferric phosphate as the positive electrode material of lithium ion cell, and belongs to the field of energy source material preparing technology. Spherical lithium ferric phosphate is prepared through mixing ferrous sulfate and solid phosphorus in the required Fe/P ratio; adding in certain speed into deionized water; adding alkali matter to regulate pH value to form the precursor ammonium ferrous phosphate; drying the precursor, mixing with lithium acetate in the same ratio, adding proper amount of conducting agent, and high temperature treatment at 600-800 deg.c for 3-30 hr in the protecting atmosphere. Thus prepared spherical lithium ferric phosphate has average grain size of 5-10 microns, tap density 2.0-2.3 g/cu cm, and room temperature initial specific discharge capacity of 140-160 mA/g. The process is simple, low in cost, high in yield and suitable for industrial production.

The invention relates to a monocrystal Ni-Co-Mn battery positive pole material and a preparing method thereof and belongs to the technical field of energy materials. The chemical formula of the monocrystal Ni-Co-Mg battery positive pole material is LiNixCoyMn1-x-yO2, wherein 0.3 < x < 0.8, and 0.1 < y < 0.4. The preparing method of the monocrystal Ni-Co-Mn battery positive pole material comprises the following steps: (1) preparation of seed crystals: adding amino water of which the concentration is 0.5-1.5 mol/L to a carbonate or acetate solution of Ni-Co-Mn; then adding a 1-4 mol/L of LiOH solution; standing, filtering and drying; mixing with LiOH.H2O and forging; (2) preparation of a precursor: adding amino water of which the concentration is 0.5-1.5 mol/L to a carbonate or acetate solution of Ni-Co-Mn, and adding a 1-4 mol/L of LiOH solution; standing, ageing and vacuum drying; (3) preparation of the monocrystal Ni-Co-Mn battery positive pole material through sintering: mixing the precursor with a lithium source and the seed crystal according to a stoichiometric ratio, compacting into a block form, sintering, cooling and pulverizing. The monocrystal Ni-Co-Mn battery positive pole material and the preparing method thereof have the advantages of simplicity in operation, easiness in the control of grain size, narrow grain size distribution range, high product purity, excellent circulating performance, excellent safety performance and the like.

A preparation method of a Cu1.8+xS binary thermoelectric material belongs to the technical field of energy materials, and is characterized by comprising the following steps of: using an elemental copper powder (its mass fraction is greater than 99.9%) and an elemental sulfur powder (its mass fraction is greater than 99.8%) as raw materials, preparing a compound powder by a mechanical alloying method according to the ratio of Cu1.8+xS (x is less than or equal to 0.1 and greater than or equal to minus 0.1), and preparing the Cu1.8+xS bulk thermoelectric material which has a rhombohedral structure at room temperature by the adoption of a spark plasma sintering technology. The thermoelectric material has high conductivity and good mechanical properties. The raw materials required by the preparation method are cheap and easily available. The preparation method has advantages of no pollution and short technological process, and is convenient and fast.

The invention relates to a Cu-S-Se ternary thermoelectric material and a preparation method of the material, belonging to the technical field of energy material. The method for preparing the Cu-S-Se ternary thermoelectric material is characterized in that high-pure metal simple substance Cu powder, high-pure Se powder and high-pure S powder are taken as raw materials and are proportioned according to the chemical general formula Cu 1.8 S 1-x Se x (wherein x is the mole fraction of Se component element and is more than or equal to 0.01 and less than or equal to 0.99); and the compound powder is synthesized by a mechanical alloying method, and a block is prepared by spark plasma sintering. The method can be used for preparing the Cu-S-Se ternary thermoelectric material simply, conveniently and accurately, and the Cu-S-Se ternary thermoelectric material has the excellent thermoelectric property at the medium temperature area.

The invention belongs to the technical field of energy materials, and specifically relates to a modified diaphragm for a lithium-sulfur battery, a preparation method of the modified diaphragm and the lithium-sulfur battery with the diaphragm; the diaphragm adopts a diaphragm body of a commercial battery as a skeleton, and a decorative coating is coated on one side of the diaphragm body; and the decorative coating consists of nanometer inorganic particles containing molybdenum element, a conductive agent and a binder. Through the diaphragm for the commercial battery and the nanometer inorganic particles containing molybdenum element as raw material and a proportional relation among the raw materials, the composite diaphragm for the lithium-sulfur battery is formed through a simple technology, the technology is simple and controllable, a complex and energy-consuming sulfur-filling process is not needed, the raw materials are wide in sources, the cost is low, and the technology is beneficial for large-scale implementation. The lithium-sulfur assembled in the invention is high in capacity and good in cycle performance, and the preparation technology is simple and controllable, economical and environmentally-friendly, and is applicable for large-scale production.

The invention provides a method for manufacturing a metal surface self-cleaning high-protection film. The method comprises two steps of molybdate solution soaking treatment and plant corrosion inhibitor-low-surface-energy material collaborative modification treatment. According to the molybdate solution soaking treatment step, a composite film which is of a specific micro/nano coarse structure, has the good protection effect and is composed of metallic oxides, molybdenum oxide and metal molybdate can be formed on a metal surface, and therefore according to the plant corrosion inhibitor-low-surface-energy material collaborative modification treatment step, efficient green plant corrosion inhibitors can be introduced into the film, and the protection effect can be obviously improved. Due to the hydrophobization effect of the low-surface-energy material on the film, the film has the self-cleaning function, the pollution can be avoided, the probability of direct contact of metal materials and corrosive media can be reduced, and the protection effect of the film can be further improved. The method has the advantages of being environmentally friendly, simple in process, convenient to operate, capable of being easily and industrially produced in a large-scale mode and the like.

The invention relates to the technical field of energy materials, and discloses a hydrate accelerator and an application thereof in preparing a high-gas-storage-density gas hydrate. The accelerant comprises amino acid and water, and is prepared by well mixing 100 parts by mass of water and 0.05-5 parts by mass of amino acid. The application comprises the specific steps that 100 parts by mass of water and 0.05-5 parts by mass of amino acid are well mixed, such that an accelerant water solution is obtained; the accelerant water solution is placed in an autoclave; high-pressure gas is delivered in under a low temperature; and a reaction is allowed for a period of time, such that the high-gas-storage-density solid gas hydrate is obtained. The accelerant provided by the invention is green and environment-friendly. With the accelerant, hydration induction time can be reduced, gas storage capacity can be increased, and gas storage density can be improved. The accelerant provided by the invention also has the advantages of low price, low dosage, and wide source. The accelerant is recyclable, and has no special requirement on temperature and pressure conditions. The method for preparing the high-gas-storage-density gas hydrate is fast, highly efficient, simple, and easy to realize.

A La-doped strontium titanate (SrTiO3)-based oxide thermoelectric material and a preparation method thereof, belonging to the technical field of energy materials. The method is divided into two parts of powder synthesis and forming of bulk materials. The powder synthesis adopts the sol-gel method, takes tetrabutyl titanate, strontium nitrate and lanthanum nitrate as raw materials, takes deionized water and ethanol as solvents and takes acetic acid and glycerol as a catalyst and a chelating agent to prepare SrTiO3 gel with different La doping amount, and the temperature is kept at the temperature of 500-560 DEG C for 1-2 hours to obtain precursor powder. The bulk forming adopts the spark plasma sintering method, and the sintering conditions are as follows: the vacuum degree is 2-10Pa, the pressure is 40-50MPa, the heating rate is 100 DEG C/min, the sintering temperature is 900-1000 DEG C, and the holding time is 5-10min. The method synthesizes the La-doped SrTiO3-based bulk thermoelectric material with high chemical homogeneity, uniform and fine grains and single-phase perovskite structure under the conditions of lower reaction temperature and shorter reaction time. The preparation method has the advantages of simple and convenient process, short synthesis and forming time, and the like.

The invention discloses a process for preparing super activated carbon from nut shell carbon and a waste liquid activation treatment method of the process, belonging to the field of biochemical engineering and energy materials. The process comprises the following steps: soaking nut shell carbon which is subjected to pre-washing and thermal treatment A into an oxidization substance in a vacuum reaction kettle; performing thermal treatment B on the nut shell carbon soaked into the oxidization substance, and soaking into an alkali aquo-complex activating agent in the vacuum reaction kettle; in inert gas or reductive atmosphere, heating the nut shell carbon to perform thermal treatment C so as to obtain activated nut shell carbon; adding water to leach and separate the activated nut shell carbon so as to obtain alkali activated mother liquor A and a solid; adding water into the solid for leaching again so as to obtain carbonate mother liquor B and activated carbon slurry; performing multi-stage washing and acidization treatment on the activated carbon slurry, washing with water, and separating so as to obtain a crude activated carbon product; and performing thermal treatment D of different stages on the crude activated carbon product, thereby obtaining an activated carbon product. The super activated carbon with high yield and good properties can be prepared, and meanwhile useful byproducts such as bicarbonate and hydrated silica can be prepared.

The invention relates to a method for recycling lithium in lithium iron phosphate through an electrochemical method, and belongs to the technical field of energy materials. The method for recycling the lithium in the lithium iron phosphate through the electrochemical method is the technical purpose needing to be achieved. According to the method, the lithium iron phosphate serves as a positive electrode, a metal or carbon type electrode serves as a negative electrode, a water-based solution serves as an electrolyte, the electric potential is applied, and lithium ions in a positive electrode material of a lithium battery move into the electrolyte water solution to form a lithium-containing solution. By means of the method, the lithium can be extracted from the lithium iron phosphate at a time, the lithium solution is formed, the emigration rate of the lithium is high and can reach 90% or above and even reach up to 99%, the content of impurities in the obtained lithium solution is low, and therefore the lithium element can be easily and efficiently recycled from the lithium iron phosphate.