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109results about How to "Reduce flatulence" patented technology

Preparation method of high-nickel ternary cathode material

The invention discloses a preparation method of a high-nickel ternary cathode material. The method comprises the steps of 1) pre-oxidizing a high-nickel ternary cathode material precursor with an oxidizing agent to obtain an oxidized high-nickel ternary precursor; 2) uniformly mixing the pre-oxidized high-nickel ternary precursor with a lithium source and a modified assistant, and performing calcining to obtain an oxidized and modified high-nickel ternary cathode material; 3) carrying out coating modification of a lithium-containing compound on the oxidized and modified high-nickel ternary cathode material to obtain a coated and modified high-nickel ternary cathode material for a power battery. According to the method disclosed by the invention, the material precursor is pre-oxidized withthe oxidizing agent, so that Ni<2+> can be fully oxidized into Ni<3+>, the cation mixing degree of the material is reduced, and the capacity of the material is expanded; and through the coating modification of the lithium-containing compound, the content of residual alkali on the surface of the material can be reduced, the generation of side reactions can be effectively inhibited, the embedding and separation of lithium ions are improved, and finally the cycling performance and the rate performance of the material are improved.
Owner:郑州中科新兴产业技术研究院 +1

Y/La-doped Co/B co-coated nickel-cobalt-manganese ternary positive electrode material and preparation method thereof

The invention belongs to the technical field of lithium batteries, and provides a Y/La-doped Co/B co-coated nickel-cobalt-manganese ternary positive electrode material and a preparation method thereof. According to the present invention, the cycle performance and the safety performance are improved by doping a small amount of Y<3+> ions and La<3+> ions, wherein Y<3+>/La<3+> and Ni<3+> have the same valence state, the doped Y<3+>/La<3+> can enter the metal Ni<3+> position, the Y<3+>/La<3+> does not produce the valence change during the charge and discharge, is electrochemically inert, and doesnot produce the valence state change during the charge and discharge so as not to produce the volume change, such that the Y<3+>/La<3+> can act as the skeleton, stabilize the crystal structure, and improve the cycle life and the safety performance of the material; and under the high voltage, the Co/B co-coated positive electrode material can effectively improve the cycle performance and the electronic conductivity of the battery, reduce the residual alkali, and reduce the flatulence, such that the co-coated nickel-cobalt-manganese ternary positive electrode material can effectively prevent theoccurrence of side reactions so as to improve the cycle performance and the electrochemical performance of the lithium battery.
Owner:GEM (HUBEI) NEW ENERGY MATERIALS CO LTD

Lithium ion positive electrode material cladded by nanometer alumina membrane and preparation method thereof

The invention provides a lithium ion positive electrode material cladded by a nanometer alumina membrane and a preparation method thereof. The preparation method comprises the following steps: evenly mixing a positive electrode material with a deionized water solution of sodium bicarbonate; slowly adding an aluminum salt solution with a certain concentration into a mixed solution of the positive electrode material; continuously stirring at the temperature within 50 DEG C to 55 DEG C and regulating the pH value of the solution to reach 8-12 by adding a proper amount of ammonium hydroxide at the same time; stirring for 20-120 minutes; then standing for 60-100 minutes; filtering, washing and drying the solution; calcining for 2-10 hours at the temperature within 100 DEG C to 700 DEG C under the oxygen atmosphere after the drying of the solution, thereby obtaining the positive electrode material cladded by the nanometer alumina membrane, wherein the nanometer alumina membrane is within 10nm to 40nm in thickness. The method is simple in synthetic process, uniform in membrane cladding and easy in industrial production, and is used for optimizing the high-rate performance and high-temperature cycling performance of the material. Thus, the requirement of the market on the positive electrode material is satisfied well.
Owner:HENAN KELONG NEW ENERGY CO LTD

Fast charging lithium titanate composite negative electrode piece and lithium ion battery

The invention discloses a fast charging lithium titanate composite negativeelectrode piece and a lithium ion battery. The lithium titanate composite negative electrode piece comprises a negative electrode current collector, wherein one or both sides of the negative electrode current collector are sequentially provided with a lithium titanate composite layer and a lithium-supplementing layer in a direction away from the negative electrode current collector, and the lithium titanate composite layer comprises lithium titanate, graphene and carbon nanotubes according to a mass ratio of (90 to 94) : (1 to 3): (1 to 3); the lithium-supplementing layer comprises organic lithium. The composite negative electrode piece is in a layered structure, the carbon nanotubes and graphene doped in the lithium titanate composite layer have the characteristics of high conductivity and large current carrying capacity, and the lithium titanate has small particles and small transmission distance, so that the lithium ion transmission time is shortened; the lithium-supplementing layer supplies sufficient lithium ions in the charging and discharging process of the battery, and the transmission rate of the lithium ions in the battery is improved, thereby the cycling performance and the rate performance of the battery are improved, and the fast charging effect is good.
Owner:深圳博磊达新能源科技有限公司

Lithium-ion battery with anti-gas-expansion automatic liquid replenishing device

The invention relates to the technical field of safety of lithium-ion batteries, and discloses a lithium-ion battery with an anti-gas-expansion automatic liquid replenishing device. The lithium-ion battery comprises a battery shell, a battery top cover board, a positive pole, a negative pole and a battery core, wherein the battery core is arranged in the battery shell; the inside of the battery shell is divided into a battery core cavity, a backup electrolyte cavity and a gas buffer cavity; the backup electrolyte cavity is filled with backup electrolyte; a fixed first partition plate is located between the battery core cavity and the backup electrolyte cavity; a second partition plate capable of moving up and down is located between the backup electrolyte cavity and the gas buffer cavity; a one-way valve A is arranged on the first partition plate; one-way valves B are arranged on the first partition plate and the second partition plate; a one-way exhaust valve is arranged on the battery top cover board; and breathable moisture absorption layers are arranged at air inlets of the one-way valve A located at the bottom of the first partition plate and the one-way exhaust valve. According to the lithium-ion battery with the anti-gas-expansion automatic liquid replenishing device, the potential safety hazard caused by battery gas expansion can be effectively solved; and the electrolyte can be automatically replenished timely.
Owner:WANXIANG 123 CO LTD

Silicon-anode lithium battery electrolyte and silicon-anode lithium battery

The invention relates to silicon-anode lithium battery electrolyte. The silicon-anode lithium battery electrolyte consists of an organic solvent, a lithium salt and additives, wherein the concentration of the lithium salt is 0.001-2 mol/L; the additives consist of an additive A and fluorinated ethylene carbonate; the mass of the additive A accounts for 0.1-20% of the mass of the electrolyte; the mass of the fluorinated ethylene carbonate accounts for 0.1-10% of the mass of the electrolyte; the additive A is a sulfite compound. In a silicon-anode lithium ion battery, in non-aqueous electrolyte, the sulfite compound and the FEC (fluorinated ethylene carbonate) are used, and in EC (ethylene carbonate)-based electrolyte, electrochemical improvement effect on a silicon anode is good, and a formed SEI (solid electrolyte interface) film is thicker, so that the defect that the silicon anode has large volume expansion change in the cycle is made up, the charge and discharge performance of the silicon-anode lithium ion battery can be improved more effectively, side reactions can be reduced, thereby reducing battery expansion and improving the cycle life of the battery, and thus the room temperature performance and the high temperature performance of the battery are very good.
Owner:ZHANGJIAGANG GUOTAI HUARONG NEW CHEM MATERIALS CO LTD

Graphite negative electrode material and preparation method thereof, negative electrode plate and lithium ion battery

The invention belongs to the technical field of lithium ion batteries and particularly relates to a graphite negative electrode material. The graphite negative electrode material comprises a natural graphite nodule base which is coated with oxide layers at a surface functional group position and a surface defect position, and the surfaces of the oxide layers and the surface, except for the oxide layer positions, of the natural graphite nodule base are coated with asphalt carbide layers or phenolic resin carbide layers. The invention further provides a preparation method of the graphite negative electrode material. The method includes steps: adopting an atomic layer deposition method for coating the surface of the natural graphite nodule base with the oxide layers, adding asphalt or phenolic resin, mixing and performing vacuum carbonizing and heat treatment. The invention further provides a negative electrode plate prepared from the graphite negative electrode material and a lithium ionbattery prepared from the negative electrode plate. The surface of the natural graphite nodule base is coated with the oxide layers only at the surface functional group position and the surface defect position, overall coating of the natural graphite surface is avoided, and ion deintercalation and electron export are less affected.
Owner:宁波柔创纳米科技有限公司

Electrolyte additive for improving battery high-temperature gas expansion, electrolyte and lithium ion battery containing electrolyte

The invention discloses an electrolyte additive for improving high-temperature flatulence of a battery, and relates to the technical field of lithium ion batteries, the additive comprises a 1,3-diphosphate-isothiazole compound and a water removal additive. The structural general formula of the 1,3-diphosphate-isothiazole compound is shown in the specification, wherein R1 and R2 are respectively and independently selected from one of H, C1-8 alkyl, C4-10 cycloalkyl, C2-10 alkenyl, C2-10 alkynyl, C6-16 aryl, C6-16 heteroaryl and part of fluoro or perfluoro compounds of the H, the C1-8 alkyl, the C4-10 cycloalkyl, the C2-10 alkenyl, the C2-10 alkynyl, the C6-16 heteroaryl and the part of fluoro or perfluoro compounds of the C6-16 heteroaryl. The invention also provides an electrolyte containing the additive and a lithium ion battery. The electrolyte has the beneficial effects that the special high-temperature gas expansion improving additive is added into the electrolyte, so that the reaction between the electrolyte and positive and negative electrode materials in the lithium ion battery under a high-temperature condition is inhibited, the stability of the positive and negative electrode materials under a high-temperature environment is improved, and the storage gas expansion and cycle performance of the battery under the high-temperature condition is improved.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY

Method for alleviating air expansion of lithium ion battery

The invention relates to a method for alleviating air expansion of a lithium ion battery. The method comprises the following steps: a, arranging an electrode sample in a reaction cavity of an atomic layer deposition instrument, vacuumizing, and heating a reaction chamber till the temperature of the reaction chamber is 300-1000 Kelvin, wherein the electrode sample is kept at the set temperature for 5-30 minutes, and the air pressure in the reaction cavity is lower than 0.01 atmospheric pressure; b, opening an air outlet valve, pulsing cleaning gas, and cleaning for 3-60 seconds; c, closing the air outlet valve, and pulsing a gaseous precursor A or a mixture of a precursor A and carrier gas; d, opening the air outlet valve, pulsing cleaning gas, closing the air outlet valve, vacuumizing, and removing excessive reaction byproducts; and g, returning to the step c, and cyclically executing the steps after c until the needed coating thickness of 2-30 angstroms is obtained. According to the invention, as a uniform metallic oxide coating is formed on the surface of an electrode, charge-discharge air expansion of the lithium ion battery can be effectively alleviated, so that the service life of the lithium battery is prolonged, and the safety of the lithium battery is improved. Moreover, the method is worthy of popularization and application.
Owner:镇江智联德科技有限公司

Aluminium and erbium coated high-nickel lithium-ion cathode material and preparation method thereof

The invention is applicable to the technical field of a lithium battery, and provides an aluminium and erbium coated high-nickel lithium-ion cathode material and a preparation method thereof. The method comprises the steps of: preparing aluminium and erbium coating liquid; dispersing a lithium-ion cathode material into water, regulating pH into an alkaline state, in a stirring state, firstly adding erbium coating liquid and then adding the aluminium coating liquid, and continuously stirring to obtain suspension; and filtering the suspension, and drying, roasting and sieving precipitates to obtain the aluminium and erbium coated lithium-ion cathode material. According to the method provided by the invention, metal aluminium and erbium ions can be well dissolved in solution and are uniformlycoated on the surface of the cathode material so as to fulfill the aim of integrating washing with coating. Residual alkali of the high-nickel lithium-ion cathode material is efficiently reduced in the aspect of physical and chemical performance, reaction of the cathode material and electrolyte is inhibited, normal temperature and high temperature cycle performance of the high-nickel cathode material are improved, and flatulence is reduced.
Owner:GEM (HUBEI) NEW ENERGY MATERIALS CO LTD

Lithium titanate electrode material with core-shell structure, preparation method and application

The invention discloses a lithium titanate electrode material with a core-shell structure, a preparation method and application, and belongs to the technical field of lithium ion battery materials and battery preparation. The lithium titanate electrode material is of the core-shell structure, lithium titanate serves as an inner core, a middle carbon layer and a lithium metaaluminate composite layer are sequentially arranged along the inner core outwards, and a shell of the material is formed by the middle carbon layer and the lithium metaaluminate composite layer. In the structure, the middle carbon layer can obstruct electron transfer between lithium titanate and electrolyte, lithium titanate and the electrolyte are prevented from being in direct contact, therefore, side reactions are reduced, the battery bloating amount is reduced, and the expansion rate of a battery is reduced. Meanwhile, a lithium metaaluminate material covering the surface of the electrode material has the advantage of being high in lithium ion conductivity, the lithium ion transmission rate of the lithium titanate battery under the large-rate condition can be increased, and therefore the rate performance of the battery is improved. Nano/micro holes formed in the lithium metaaluminate composite layer due to decomposition of a binding agent at high temperature can absorb and store the electrolyte, and therefore the circulating performance of the electrode material can be improved.
Owner:深圳博磊达新能源科技有限公司

Compound fresh-keeping method for hot peppers through control in secondary fermentation low-salt mode

The invention discloses a compound fresh-keeping method for hot peppers through control in a secondary fermentation low-salt mode. The method comprises the following steps: taking fresh pod peppers, sterilizing, washing, chopping, adding salt, weight of which accounts for 10-15% of hot peppers, sealing and fermenting under normal temperature, and performing gas-exhausting treatment; adding cold boiled water, rice wine, lysozyme, potassium sorbate and sodium benzoate, continuously sealing and fermenting at the room temperature, and directly filling. According to the compound fresh-keeping method disclosed by the invention, the pod peppers and low salt (10-15%) fermentation are adopted, fermentation is performed in stages (primary fermentation mainly refers to gas exhaustion and continuous fermentation after seasoning), and direct filling is performed without sterilizing, so that product salinity is reduced, loss of nutrient ingredients is reduced, waste emission is avoided in the whole production process, production process links are reduced, stability of product quality is guaranteed, and a processing process can be standardized. The obtained product is bright in color and luster, is strong in sauce smell, is salt and delicious in taste, and is good in fermenting flavor.
Owner:HUNAN TANTANXIANG FOODS TECH
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