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115results about How to "High degree of practicality" patented technology

Preparation method of silicon and carbon-coated graphene composite cathode material

ActiveCN103050666ARealize in situ restorationThe preparation process is simple, convenient and practicalMaterial nanotechnologyCell electrodesCarbon coatedStructural stability
The invention discloses a preparation method of a silicon and carbon-coated graphene composite cathode material. The technical problem to be solved is to enhance the electronic conductivity of the silicon-based cathode material, buffer the volume effect produced in the process of deintercalation of the lithium in the silicon-based cathode material and enhance the structure stability in the circulation process of the material at the same time. The material is prepared by using a spray drying-thermally decomposing treatment process in the invention. The preparation method comprises the following steps of: evenly dispersing nano silicon and graphite micro powder in a dispersion solution of oxidized graphene, carrying out thermal treatment under an inert protection atmosphere after spray drying, subsequently cooling along a furnace to obtain the silicon and carbon-coated graphene composite cathode material. The extra binder does not need to add in the process of manufacturing balls in the invention and the outer oxidized graphene is thermally reduced in situ to graphene in the thermal treatment process of the composite precursor, so that the process is simple and easy to operate; and the practical degree is high. The prepared composite material has the advantages of great reversible capacity, designable capacity, good cycling performance and high-current discharging performance, high tap density and the like.
Owner:CENT SOUTH UNIV

Three-dimensional model attitude angle video measuring system for wind tunnel model test

The invention relates to a three-dimensional model attitude angle video measuring system for a wind tunnel model test, in particular to a three-dimensional model attitude angle video measuring system for wind tunnel model three freedom degrees. For increasing the precision of wind tunnel model angle real-time measurement, the three-dimensional model attitude angle video measuring system overcomes the common problems of systems that the prior device has single-angle measuring ability, can not measure a side slip angle of a model, has no real-time performance, and needs postprocessing and the like. The three-dimensional model attitude angle video measuring system is composed of digital cameras, a zoom lens, a zoom lens controller, a driving lightening marking point, a high-speed computer and collection controlling and measuring software, wherein the driving lightening marking point (4) is arranged on the model, the two digital cameras (6) are used for recording, collecting and measuring in real time, the zoom lens controller (2) is connected with the high-speed computer (3) and is used for controlling the zoom lens (1), collecting images and transmitting the images to the high-speed computer (3), and the image data is processed by the collection controlling and measuring software (5) to measure and process the device in real time so as to obtain the real three-dimensional attitude angle of the model.
Owner:中国航空工业空气动力研究院

Preparation method for composite cathode material of lithium ion battery

The invention discloses a preparation method for a composite cathode material of a lithium ion battery by means of spray drying pyrolysis treatment. The preparation method includes the steps: dissolving a first type of binder organic carbon source into solvent of a proper quantity, adding a silicon source, a second type of binder and a dispersing agent, dispersing uniformly, adding graphite, dispersing for a certain time, subjecting uniformly dispersed suspension to spray drying, and using the first type of binder organic carbon source to bond the silicon source, the graphite and the second type of binder particles into spherical or spherical-like forms to obtain a composite precursor; and transferring the precursor into a shielding atmosphere for sintering, heating the second type of binder to a certain temperature to be melted into a liquid crystal state, bonding the particle silicon source and the graphite into cores, subjecting the organic carbon source to pyrolysis at the high temperature to form a coating, and furnace cooling to obtain the carbon-silicon composite cathode material of the lithium ion battery. The preparation method is simple, easy in implementation and high in practicality. The carbon-silicon composite prepared by the method has the advantages of high reversible capacity, designable capacity, high circulating performance and high-current discharging performance, high tap density and the like.
Owner:CENT SOUTH UNIV

Multi-core core-shell-structure silicon carbon composite negative pole material and preparation method thereof

The invention relates to a multi-core core-shell-structure silicon carbon composite negative pole material and a preparation method thereof. The preparation method comprises the following steps: 1. preparation method of high-dispersivity multi-core porous spheres; 2. preparation of high-dispersivity asphalt suspension; and 3. preparation of multi-core core-shell-structure silicon carbon composite negative pole material: adding the porous spheres prepared in the step 1 into the high-dispersivity asphalt suspension prepared in the step 2, carrying out ultrasonic dispersion, heating and drying by distillation while intensely stirring to remove the solvent, transferring the powder particles into a protective atmosphere, and holding at low temperature so that the asphalt liquid enters the inside of the porous spheres to enhance the binding strength between the silicon source and the conducting carbon mesh, carry out secondary coating on the silicon source, overcome the defects in the coating in the step 1 and enhance the capacity performance of the silicon; and carrying out high-heat treatment. The invention is simple and easy to implement, and has the advantage of high practicality. The prepared silicon carbon composite material has the advantages of high reversible capacity, designable capacity, favorable cycle performance, favorable heavy-current discharge capacity, high tap density and the like.
Owner:CENT SOUTH UNIV

Preparation method and application of prussian blue complex/carbon composite material

The invention discloses a preparation method of a prussian blue complex / carbon composite material and an application of the composite material as a positive electrode material for lithium ion and sodium ion batteries. The preparation method of the prussian blue complex / carbon composite material comprises at least the steps of uniformly dispersing a transition metal cyano complex, an inorganic acid and a carbon material in water to obtain a reaction solution; and heating the solution for a certain time to obtain the prussian blue complex / carbon composite material. The method is simple in preparation, can be controlled easily and has high practical degree. Crystal water content and coordinated water content in the obtained prussian blue complex / carbon composite material are little, so that the prussian blue complex / carbon composite material presents high capacity and excellent cycle performance when being used as the positive electrode material for the lithium ion and sodium ion batteries.
Owner:INST OF CHEM CHINESE ACAD OF SCI

Composite lithium-rich anode material, its preparation method and its application

InactiveCN102244259AReduce the first irreversible capacity lossImproved magnification performanceCell electrodesCapacity lossPower performance
The invention discloses a composite lithium-rich anode material of a lithium battery, its preparation method and its application. According to the invention, the surface modified lithium-rich material comprises a metal salt of a coating layer (M' denotes Mo, Zn, Ti, V, W) and a main phase Li[Li1-x-y-zMnxCoyNiz] O2 (0.1<=y=z<x<=2 / 3), wherein the mass ratio of the two is 0-50%. The preparation method comprises the following steps: dissolving the obtained Li [Li1-x-y-zMnxCoyNiz]O2 (0.1<=y=z<x<=2 / 3) lithium-rich material in a transition metal salt solution of 0.02-10g / L, well mixing and drying the solution under the temperature of 50 - 150 DEG C, and then calcining under the temperature of 200 DEG C - 800 DEG C for 2 - 12 hours to obtain the surface modified Li [Li1-x-y-zMnxCoyNiz]O2 (0.1<=y=z<x<=2 / 3) lithium ion battery anode materials. The present invention reduces initial irreversible capacity loss of the lithium-rich material, and is capable of greatly improving the multiplying power performance and the cycle performance, as well as meeting the requirement of the high-power lithium ion battery.
Owner:INST OF CHEM CHINESE ACAD OF SCI

Method for preparing silicon carbide composite particles and application thereof as cathode material of lithium ion battery

The invention discloses a method for preparing silicon carbide composite particles and application thereof as a cathode material of a lithium ion battery. The method for preparing silicon carbide composite particles comprises the following steps: 1) performing electrostatic spraying on solution containing a silicon source and a carbon source so as to obtain spherical particles, wherein the carbon source is a carbon-containing high-molecular polymer; and 2) sintering the spherical particles in a non-oxidizing atmosphere to obtain the silicon carbide particles. The method enables one-step forming without needing a template and has high practicality; and moreover, the obtained silicon carbide composite particle integrates the advantages of the silicon carbide composite material with the advantages of a porous material, and improves the problems of weak cyclicity and low coulombic efficiency of using silicon-based material as the cathode material of the lithium ion battery.
Owner:BEIJING IAMETAL NEW ENERGY TECH CO LTD

High-compaction density silicon-carbon negative electrode material and preparation method and application thereof

The invention provides a high-compaction density silicon-carbon negative electrode material and a preparation method and an application thereof. The silicon-carbon negative electrode material is formed by mixing silicon powder, graphite and an additive at a certain ratio; and the final product is obtained by burning, coating and re-burning the silicon-carbon negative electrode material, wherein the silicon-carbon composite material is of a porous spherical structure; silicon is evenly dispersed into porous silicon carbon balls in a form of nanometer silicon; the particle sizes of the silicon are smaller than 200nm; and a uniform coating layer is formed on the surface of the silicon. The high-compaction density silicon-carbon negative electrode material is high in efficiency, high in capacity and good in cycling stability when applied to a lithium-ion battery, low in cost and suitable for large-scale production and the preparation method is simple.
Owner:JIANGXI IAMETAL NEW ENERGY TECH CO LTD

Spherical silicon/carbon composite material for lithium ion battery as well as preparation method and application thereof

The invention provides a spherical silicon / carbon composite material for a lithium ion battery and a preparation method thereof. The spherical silicon / carbon composite material for the lithium ion battery comprises a porous silicon / carbon composite material and an organic or inorganic carbon source filling the porous silicon / carbon composite material, wherein the content of silicon in the porous silicon / carbon composite material is 20% to 80%, and the content of carbon in the porous silicon / carbon composite material is 20% to 80%. The spherical silicon / carbon composite material for the lithium ion battery is high in cycling stability and high in tap density if applied to a lithium ion battery, and can be produced on a large scale.
Owner:BEIJING IAMETAL NEW ENERGY TECH CO LTD

Method for preparing Prussian blue positive electrode material, and sodium ion battery

The invention discloses a method for preparing a Prussian blue positive electrode material, and a sodium ion battery, wherein the molecular formula of the Prussian blue positive electrode material is Na2-xMyFe(CN)6, x is more than o 0 and is less than 2, y is more than 0 and is less than 1, and M is a transition metal. The preparation method comprises: adding a Na4Fe(CN)6 solution into a solution 2 containing the salt solution of M, a sodium salt and a pH value adjusting agent in a dropwise manner, maintain the pH value of the mixed solution at 6-7, and heating for a certain time in a protection atmosphere to obtain the Prussian blue positive electrode material. According to the present invention, the method has characteristics of simple process, easy control and continuous and scale production, and can be used for preparing the high sodium content Prussian blue positive electrode material; and the prepared Prussian blue positive electrode material as the sodium ion battery positive electrode material can improve the specific capacity of the battery, can reduce the polarization in the battery charging and discharging process, and has wide application prospects in the field of electric energy storage in the power grid.
Owner:GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +2

Alkaline earth metal germanate nanomaterial and preparation method thereof and use thereof as cathode material of lithium ion battery

The invention discloses an alkaline earth metal germanate nanomaterial and a preparation method thereof and use of the nanomaterial as a cathode material of lithium ion batteries. The method comprises the following steps of: (1) mixing an aqueous solution of alkaline earth metal salt and germanium source compound GeO2 to obtain a liquid mixture; (2) allowing reaction of the liquid mixture obtained in the step (1) to take place in a polytetrafluoroethylene-lined high-pressure reaction kettle after heating, and cooling after the reaction is completed to obtain the alkaline earth metal germanate nanomaterial. The method is simple, has abundant and easily-available raw materials, is suitable for large-scale production and has a high level of practicability. The obtained alkaline earth metal germanate is a nanomaterial, has a high actual capacity, can be directly used as a cathode material of lithium ion batteries, solves the problem that the germanium-based material as lithium ion battery cathode material has a poor cycling property and takes a violent change of volume during charging / discharging process, and can be directly used as the cathode material of lithium ion batteries.
Owner:INST OF CHEM CHINESE ACAD OF SCI

Real-time power generation plan optimization method with consideration of depth peak regulation of thermal power generating unit

The invention discloses a real-time power generation plan optimization method with consideration of depth peak regulation of a thermal power generating unit. The method comprises: various power system operation data needed by an existing real-time power generation plane model and related parameter information of depth peak regulation of a thermal power generating unit are obtained, wherein the related parameters include a depth peak regulation discrete output point, a discrete point price, a minimum depth peak regulation time length, and a minimum non-depth peak regulation time length; on the basis of the existing real-time power generation plan model, a related depth peak regulation constraint of the thermal power generating unit is introduced, and a real-time power generation plan optimization model with consideration of depth peak regulation of the thermal power generating unit is generated based on the data obtained at the previous step; and optimized calculation and security checking are carried out on the optimization model to obtain a real-time power generation plan. According to the invention, the output level of the thermal power generating unit in a depth peak regulation state can be optimized automatically based on the ultra-short-term system load and new energy changing situations; on the basis of real-time cooperation with other energy, the power usage demand of the system can be satisfied; and maximum receiving of the system new energy and peak regulation requirements can be met.
Owner:CENT CHINA BRANCH OF STATE GRID CORP OF CHINA +2

Porous silicon-carbon composite material and preparation method thereof

The invention discloses a porous silicon-carbon composite material and a preparation method thereof. The porous silicon-carbon composite material is formed by bonding a silicon-based material and a carbon-based material. The silicon-based material comprises silicon, a silicon oxide and silicate, and the silicate is dispersed in a silicon oxide substrate. The carbon-based material comprises a carbon material and an amorphous carbon coating material. The carbon material and the silicon-based material are in contact with each other and are bonded together to form a porous structure, and the amorphous carbon coating material coats the surface of the porous structure. The condition is that the total mass of the porous silicon-carbon composite material is 100%, and the mass percentage content ofsilicate is 5%-30%. The porous silicon-carbon composite material shows an extremely low expansion rate when used as a lithium ion battery negative electrode material, and has high specific capacity,high initial coulombic efficiency, excellent cycle performance and excellent rate capability. In addition, the preparation method is simple, and is a method suitable for industrial large-scale production of the silicon-carbon composite material for lithium ion batteries.
Owner:BEIJING IAMETAL NEW ENERGY TECH CO LTD +1

Lithium-rich cathode material of lithium ion battery and preparation method thereof

The invention discloses a lithium-rich cathode material of a lithium ion battery and a preparation method thereof. The cathode material is a Li [LixNiyMnzCo1-x-y-z]O2+delta nanoparticle with a particle size of 10 nanometers-2 micrometers, wherein, x is greater than or equal to 0.05 and smaller than or equal to 0.5, y is greater than or equal to 0 and smaller than or equal to 0.95, x is smaller than or equal to 2z, z is greater than or equal to 0.025 and smaller than or equal to 0.95, and x+y+z is greater than or equal to 0.075 and smaller than or equal to 1, delta ranges from -0.2 to +0.2. The preparation method comprises the following steps of: subjecting a lithium salt, a transition metal salt and a gelatinizing agent to a reaction in a solvent so as to obtain a sol; drying the sol, thus obtaining precursor powder; carrying out pre-sintering and sintering in order to the precursor powder, thus obtaining the cathode material. The transition metal salt is a mixture of a manganese salt and at least one of a nickel salt and a cobalt salt. The lithium-rich cathode material provided in the invention is a nano-material, and can be used as a battery electrode material and presents an excellent electrochemical property.
Owner:INST OF CHEM CHINESE ACAD OF SCI

Preparation method of zinc ferrite nano-material

The invention discloses a preparation method of a zinc ferrite nano-material and belongs to the technical field of nano-material preparation. The ZnFe2O4 nano-material is prepared in the way that a solvothermal method is adopted to prepare a metal-organic precursor material, and then a high-temperature calcining method is adopted for treatment. The zinc ferrite nano-material is prepared by the following steps: zinc nitrate hexahydrate, ferric acetylacetonate, terephthalic acid and polyvinylpyrrolidone are dissolved in a N,N-dimethylacetamide and ethyl alcohol mixed solution; stirring is performed at the room temperature, an obtained turbid liquid is transferred into a reaction kettle, heating is performed under a certain temperature condition, and centrifugal separation and vacuum drying are performed to obtain a precursor Fe III-MOF-5 nano-material; and high-temperature calcination is performed at a certain temperature to obtain the ZnFe2O4 nano-material. The preparation method is simple, green, pollution-free and high in degree of practicability, and the prepared ZnFe2O4 nano-material can directly serve as a gas-sensitive material for use.
Owner:DALIAN UNIV OF TECH

Day-ahead generation schedule optimization method considering thermal power and electric thermal storage combined peaking

The invention belongs to the technical field of dispatching automation of an electric power system, and relates to a day-ahead generation schedule optimization method considering thermal power and electric thermal storage combined peaking. Based on day-ahead generation schedule planning input data, on the basis of a conventional optimization model, relevant parameters of thermal power generating unit deep peaking and electric thermal storage energy storage peaking are maintained, relevant constraint conditions of thermal power generating unit deep peaking and electric thermal storage energy storage peaking are introduced, and a day-ahead generation schedule optimization model, namely an SCED model, considering thermal power and electric thermal storage combined peaking is formed; through the optimization model, the future operation condition of a power grid can be combined, a more reliable and effective thermal power and electric thermal storage energy storage active plan is programmedunder the condition that system new energy consumption capacity and system load peaking requirement are sufficiently evaluated, the unit planning implementation rate is improved, the system peaking pressure is alleviated, the maximum consumption of new energy is realized, and the increasingly refined large power grid safety operation requirement is met.
Owner:STATE GRID LIAONING ELECTRIC POWER RES INST +3

Preparation method and application of in-situ carbon-compounded prussian blue type compound thin film

The invention discloses a preparation method and application of an in-situ carbon-compounded prussian blue type compound thin film. The preparation method comprises the following steps: (1) carrying out ultrasonic dispersion on carbon materials in a NaCl solution; (2) weighing transition metal cyano complexes, a reducing agent and inorganic acid in a ratio and adding into the solution; (3) electrolyzing for 3-5 minutes in water to clean the surface of an ITO conducting substrate; and (4) generating the in-situ carbon-compounded prussian blue type compound thin film on the ITO conducting substrate under a constant-voltage condition relative to voltage from -2.0V to 2.0V of a standard Ag / AgCl electrode. According to the preparation method and the application, the film is formed in one step, the preparation method is rapid and simple and low in cost and the electrical conductivity of the obtained compound material is greatly improved; and the content of sodium is high, and vacancy and the water content are low. As a sodium-ion battery positive electrode material, the material has the characteristics of high specific capacity, high cycling stability, excellent rate performance and the like, and has a bright prospect in large-scale development and application of sodium-ion batteries.
Owner:ZHEJIANG UNIV

Method and system for measuring effective value of electric parameter of electric motor powered up by frequency converter

The invention relates to a measuring method for an effective value of an electric parameter of an electric motor powered up by a frequency converter and a frequency control system. The method comprises the following steps of: (a) obtaining a period T of the electric parameter, determining the sampling frequency N according to the period T, and establishing an array {p(0)2, p(1)2, p(2)2, to p(N)2, p'} for data storage; (b) sampling the electric parameter N times in one period T, and sequentially storing the square of the sampling value to p(1)2, p(2)2, to p(N)2; and (c) utilizing a formula to compute the effective value P of the electric parameter in the period T. By adopting the method, the effective value of a non-sinusoidal periodic electric signal can be precisely obtained in real time, the computational method is simple, the treatment of an arithmetic unit is convenient and fast, the requirements for hardware are low, and the practical degree is high.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1

Porous carbon/sulfur composite material, its preparation method and application

The invention discloses a porous carbon / sulfur composite material and its preparation method. The method comprises the following steps of: (1) adding water into a mixture of alginic acid and a metal hydroxide, and stirring them uniformly to obtain a reaction solution; (2) evaporating the water of the reaction solution, and then conducting heating under a non-oxidizing atmosphere so as to obtain a porous carbon material precursor; (3) treating the porous carbon material precursor with water or an acid solution, then drying the precursor so as to obtain a porous carbon material; and (4) heating a mixture of the porous carbon material and sulfur powder, thus obtaining the porous carbon / sulfur composite material. The invention also provides application of the porous carbon / sulfur composite material as a battery electrode material, especially its application as a lithium sulfur battery positive electrode material. Compared with the prior art, the preparation method of the porous carbon / sulfur composite material provided in the invention has the advantages of simple preparation method, easily available raw materials, suitability for mass production, and high degree of utility. The porous carbon / sulfur composite material provided in the invention can be directly used as a battery electrode material.
Owner:INST OF CHEM CHINESE ACAD OF SCI

Cathode material of lithium ion battery and preparation method thereof

The invention provides a cathode material of a lithium ion battery and a preparation method thereof. The cathode material comprises LiNixMnyCo(1-x-y)O2 nanoparticles, and the particle size of the nanoparticles is 10nm-2 mu m, wherein 0.1 <= x <= 0.9, 0.1<= y <= 0.9, and x + y <= 0.9. The preparation method of the cathode material comprises the following steps: enabling a lithium salt, a nickel salt, a cobalt salt, a manganese salt and a gelatinizing agent to perform reaction in water for getting sol; drying the sol to get precursor powder; and sequentially performing pre-sintering and sintering on the precursor powder and then getting the cathode material. The preparation method of the cathode material of the lithium ion battery, which comprises lithium, nickel, manganese, cobalt and oxygen is simple and easy to operate, raw materials are easy to get, and components in a product can be strictly controlled through feed ratio, thereby being suitable for large-scale production and being high in degree of practical degree. The cathode material of the lithium ion battery, which comprises the lithium, the nickel, the manganese, the cobalt and the oxygen is nano-material, can be directlyused as an electrode material of the battery and represents excellent electrochemical performance.
Owner:INST OF CHEM CHINESE ACAD OF SCI

Preparation method and application of reduced graphene oxide

The invention discloses a preparation method and an application of reduced graphene oxide. The reduced graphene oxide is prepared through an ionothermal technology. The method comprises the following steps: adding graphene oxide into an ionic liquid, carrying out ultrasonic dispersion to obtain an ionic liquid solution of graphene oxide, heating the solution to 150-220DEGC, reacting for 6-30h, cleaning, and freeze-drying to obtain the reduced graphene oxide. The preparation method has the advantages of simplicity, no pollution and high practicality degree, and the obtained reduced graphene oxide can be directly used as a super capacitor electrode material.
Owner:DALIAN UNIV OF TECH

Day-ahead power generation plan optimization method and system thermal power fusion and electric energy storage combined peak shaving

The invention discloses a day-ahead power generation plan optimization method based on thermal power fusion and electric energy storage combined peak shaving. The day-ahead power generation plan optimization method comprises the following steps: S1, acquiring relevant parameter information of deep peak regulation and electric energy storage bidirectional peak regulation of a thermal power generating unit, and generating a day-ahead power generation plan calculation scene of thermal power fusion and electric energy storage combined peak regulation in combination with various parameter information required by a day-ahead power generation plan; S2, generating a day-ahead power generation plan optimization model of thermal power fusion electric energy storage combined peak regulation accordingto the parameter information in S1; and S3, carrying out optimization calculation and safety check on the day-ahead power generation plan optimization model of thermal power fusion electric energy storage combined peak regulation generated in the S2 to obtain a day-ahead power generation plan, and clearing the price of a peak regulation auxiliary service market. The day-ahead power generation plan optimization method can improve the day-ahead plan execution rate, promote the new energy consumption and meet the increasingly lean large power grid safety operation demands under the condition offully evaluating the next-day new energy consumption capability and the system load peak regulation demands in combination with the next-day power grid operation mode.
Owner:NARI TECH CO LTD +4

Nano silicon alloy based composite negative pole material and preparation method thereof

The invention discloses a nano silicon alloy based composite negative pole material. The nano silicon alloy based composite negative pole material has a three-shell layer structure, wherein a core layer is a nano carbon material coated nano silicon alloy core layer, and a three-shell layer is of a three-shell layer structure and is a conductive polymer film layer which is prepared by taking Fe3O4 nano-microspheres as sacrificial templates. The invention further discloses a preparation method of the nano silicon alloy based composite negative pole material. According to the preparation method, firstly, a nano silicon alloy material is prepared by a ball milling method and is subjected to wet grinding with a nano carbon material, then, hot coating is carried out so as to form the nano carbon material coated nano silicon alloy core layer, and then, the conductive polymer film layer with the three-shell layer structure is formed on the surface of the core layer by using a sacrificial Fe3O4 microsphere template method, so that the volume expansion of the nano silicon alloy material is effectively buffered. The nano silicon alloy based composite material disclosed by the invention has the advantages of high specific capacity, excellent cycle performance and rate performance, high tap density, and the like. The preparation method of the negative pole material, provided by the invention, is simple, environmentally friendly and pollution-free.
Owner:威海南海碳材料有限公司 +1

Chlorine-doped modified lithium ion battery lithium-rich cathode material and preparation method thereof

The invention relates to a chlorine-doped modified lithium ion battery lithium-rich cathode material and a preparation method thereof and belongs to the field of lithium ion batteries. The cathode material is Li[Li0.2Ni(0.2-0.5b+0.5a)CobMn(0.6-0.5b-0.5a)]O(2-a)Cl(a), wherein a is more than 0 and not more than 0.1, and b is not less than 0 and not more than 0.13; and lithium salt, nickel salt, manganese salt, cobalt salt, lithium chloride and a combustion improver are ground into fine powder, a solvent is added and then uniformly mixed, and the lithium ion battery lithium-rich cathode material is obtained by firing. The lithium ion battery lithium-rich cathode material is high in discharge specific capacity, high in cycle stability, high in magnification performance and compatible in high-temperature performance and low-temperature performance, and can meet requirements of a power battery. The chloride salt for doping is rich in source, low in cost, environment-friendly, simple and practicable in synthesis process, low in manufacturing cost, convenient for large-scale industrial production and high in practicability.
Owner:JIANGNAN UNIV

Silicon oxide/carbon/metal element composite material and preparation method and application thereof

ActiveCN105870415AWell mixedSolve the defect of poor conductivityCell electrodesSecondary cellsSilicon oxidePollution
The invention relates to an SiOx / C / M composite material and a preparation method and an application thereof. The SiOx / C / M composite material is prepared from an SiOx material, a carbon material and an M component and is prepared through a simple, efficient, low-cost and pollution-free production technology on a large scale. The composite material is taken as a negative electrode material for a lithium-ion battery, so that the electrochemical properties of the SiOx negative electrode material are significantly improved; and the defects that the SiOx negative electrode material is extremely poor in conductivity, poor in capacity development and relatively low in initial coulomb efficiency are overcome.
Owner:BEIJING IAMETAL NEW ENERGY TECH CO LTD

Method for preparing heteroatom co-doped porous carbon materials based on direct ionic liquid carbonization method

The invention belongs to the field of battery electrode materials, and relates to a method for preparing heteroatom co-doped porous carbon materials based on a direct ionic liquid carbonization method. The heteroatom co-doped porous carbon materials prepared by the direct ionic liquid carbonization method have proper pore size distribution and high specific surface area, and show high specific capacity and excellent circulating stability when serving as super-capacitor and lithium secondary battery electrode materials. The synthesis process of the heteroatom co-doped porous carbon materials synthesized by the direct ionic liquid carbonization method is simple, and other heteroatom sources are omitted. The heteroatom co-doped porous carbon materials synthesized by ionic liquid serving as a green solvent is green, environmentally friendly and high in practical level, and the problems of toxicity and complexity of a current preparation process of heteroatom doped electrode materials are solved.
Owner:DALIAN UNIV OF TECH

Wave soldering tank

A wave soldering tank is provided on which it is easy to perform maintenance, which does not have fluctuation of the height of spouted solder, which does not damage the rotating shaft of a discharge pump, and which can be stably used for long periods.The wave soldering tank 1 has a tank body 1a which houses molten solder S, a discharge pump 5 which pumps molten solder S, a discharge nozzle 4 which spouts molten solder S which was sent to it by the discharge pump 5 upwards, a duct 2 having the discharge pump 5 installed at one of its ends and the discharge nozzle 4 installed at its other end, an oxidation preventing member 22 which has a prescribed size and which floats on the surface of the molten solder S, and an engaging means 13 which controls rotation of the oxidation preventing member 22 in a horizontal plane. The oxidation preventing member 22 has a surrounding member 28 which extends downwards at its center and which surrounds the rotating shaft 10 with a gap between it and the rotating shaft 10, and a hollow space 26 in its interior for providing buoyancy.
Owner:SENJU METAL IND CO LTD

Waste heat recovery system of liquid cooling data center

The invention discloses a waste heat recovery system of a liquid cooling data center. The waste heat recovery system comprises a first heat exchanger, a heat dissipation system, a solar heat collection and heat storage system and a heat energy utilization system, wherein each system is a circulation loop internally provided with a working medium flow, the first heat exchanger is a part of the heatdissipation system, the heat dissipation system and the solar heat collection and storage system are connected with the heat energy utilization system through a heat exchange pipeline and the solar heat collection and storage system to provide heat energy, and the waste heat of the solar heat collection and heat storage system is used for civil heating. The solar heat collection and heat storagesystem is used for upgrading a low-temperature waste heat source, energy storage is carried out, the input energy fluctuation in the daytime and at night is balanced, the heat source is utilized for heat energy utilization, the waste heat is used for providing hot water and heating for a building, redundant low-grade heat is discharged into the environment through a cooling tower, and the waste heat recovery efficiency of the liquid cooling data center is improved, the energy consumption of the data center is reduced, the energy utilization efficiency is improved, the energy consumption is reduced, and meanwhile, the operation cost of the data center is reduced.
Owner:广东西江数据科技有限公司

Air quality management method, air quality management system and computer-readable storage medium

The invention discloses an air quality management method which comprises the steps that after an execution terminal is started up, the execution terminal detects whether the execution terminal has anair quality active management authority authorized by a user in advance, and if so, an air quality parameter of a site where the execution terminal is located is acquired and the acquired air qualityparameter is transmitted to a cloud server; the cloud server generates a corresponding air quality executive instruction according to the received air quality parameter and user authorization information which is stored in advance and corresponds to the execution terminal, and the cloud server issues the generated air quality executive instruction to the execution terminal; and the execution terminal executes a corresponding air conditioning function according to the air quality executive instruction. The invention further discloses an air quality management system and a computer-readable storage medium. System product design related to air quality management can be simplified, the cost is lowered, and the intelligent degree, the practical degree and the user privacy protection degree of the air quality management are improved.
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1

Synthetic method of zinc-cobalt Prussian blue compound

The invention relates to the technical field of Prussian blue compound synthesis, in particular to a synthesis method of a zinc-cobalt Prussian blue compound, which comprises the following steps: (1)adding polyvinylpyrrolidone, zinc acetate dihydrate and sodium citrate into deionized water, and carrying out ultrasonic treatment until the components are completely dissolved to obtain a zinc acetate solution A; (2) adding potassium hexacyanocobaltate into deionized water, and carrying out ultrasonic treatment until the components are completely dissolved to obtain a potassium hexacyanocobaltatesolution B; (3) quickly adding the zinc acetate solution A into the potassium hexacyanocobaltate solution B to obtain a mixed solution; (4) carrying out ultrasonic treatment on the mixed solution until the mixed solution becomes turbid to obtain a mixed dispersion C of zinc acetate and potassium hexacyanocobaltate, standing the dispersion C at room temperature, and sequentially carrying out centrifugation, washing and drying treatment to obtain products in cubic, cubooctahedral or octahedral morphologies; or directly stirring the mixed solution at room temperature to prepare a rod-shaped product. The synthesis method is simple, and the morphology of the product is easy to control.
Owner:HUAIHAI INST OF TECH
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