2792results about How to "Inhibit side effects" patented technology

A compound which is either A:or B:and salts and solvates thereof, as well as their conjugates with a cell-binding agent.

The present invention provides: (i) a nonaqueous electrolyte for batteries, which is characterized by containing halogen; (ii) a nonaqueous electrolyte for batteries, which is characterized by containing pyrrol or its derivative and halogen; and (iii) a lithium secondary battery which is characterized by including the nonaqueous electrolyte (i) or (ii). The inventive lithium secondary battery has improvements in charge / discharge and cycle life characteristics at ambient and high temperatures, and / or storage characteristics and safety at high temperature.

The invention discloses a preparation method of a lithium ion battery ternary cathode material. According to the preparation method, full grinding is performed through a colloid mill to improve the reactivity of a precursor and a lithium salt and the uniformity of a mixed material; and a carbon chain organic additive is added in the process of grinding to improve the viscosity of a sizing material, inhibit raw material segregation in the process of drying, quickly balance the temperature of each part of a system in the process of high-temperature reaction and inhibit agglomeration among particles, so that a uniform-appearance and regular mono-crystal ternary cathode material is obtained. Meanwhile, the ternary cathode material is doped and subjected to surface coating modification, so that the structure of the material is stabilized, the side reaction between the material and electrolyte is inhibited, and the high-temperature cycle performance of the material is improved.

A positive active material is provided which can inhibit side reactions between the positive electrode and an electrolyte even at a high potential and which, when applied to a battery, can improve charge / discharge cycle performance without impairing battery performances even in storage in a charged state. Also provided are: a process for producing the active material; a positive electrode for lithium secondary batteries which employs the active material; and a lithium secondary battery which has improved charge / discharge cycle performance while retaining intact battery performances even after storage in a charged state and which can exhibit excellent charge / discharge cycle performance even when used at a high upper-limit voltage. The positive active material comprises: base particles able to dope and release lithium ions; and an element in Group 3 of the periodic table present on at least part of that part of the base particles which is able to come into contact with an electrolyte. It is produced by, e.g., a process which comprises: producing base particles containing lithium and able to dope and release lithium ions; and then imparting an element in Group 3 of the periodic table to the base particles so that the element can be present on at least part of that part of the base particles which is able to come into contact with an electrolyte.

A positive electrode including a current collector; a positive active material layer disposed on the current collector; and a coating layer disposed on the positive active material layer. The coating layer includes a binder and a inorganic additive. The binder is a poly(vinylidenefluoride-hexafluoropropylene) copolymer comprising 2 to 16 mole % of hexafluoropropylene. The positive electrode for a rechargeable lithium battery suppresses side-reactions between a positive electrode and an electrolyte, at a high voltage.

The preparation process of modified Ti-Si molecular sieve TS-1 with MFI structure includes mixing water solution of Si and synthesized TS-1 molecular sieve, the reaction of the mixture at 80-190 deg.c in the reactor for 0.1-150 hr, filtering, washing and drying. The modified Ti-Si molecular sieve TS-1 has certain amount of inert component Si covering the surface and pores and less Ti content in the surface and pores and thus less side reaction in the said places, and these results in raised catalytic oxidation activity, prolonged service life and less side product.

The invention discloses a preparation method and an application of an acrylate heterozygotic emulsion. In the invention, the acrylate heterozygotic emulsion is synthesized by adopting a seed emulsion polymerization process and combining a process of instantly neutralizing and segmentally adding polar monomers. The acrylate heterozygotic emulsion comprises macroparticles consisting of polymers P2 rich in hydroxyl groups on a surface layer and microparticles consisting of polymers P1 rich in carboxylate on the surface layer. Compared with a conventional hydroxy acrylate emulsion, the acrylate heterozygotic emulsion has smaller mean grain size and wider grain size distribution on emulsion particles. The acrylate heterozygotic emulsion can be adopted to prepare aqueous bi-component polyurethane wood coatings, and a coating layer of the coating has excellent property of resisting water and solvents, high crosslinking density and hardness, good mechanical property, scratching resistance and wear resistance. The acrylate heterozygotic emulsion has compact coating structure, high glossiness and better combination property, and not only can be applied to high-grade wood coatings, but also can be applied to automotive refinish paint, metallic anti-corrosion paint, other industrial protective paint, and the like.

New polyol ether compounds and a process for their preparation. The process comprises reacting a polyol, a carbonyl compound, and hydrogen in the presence of hydrogenation catalyst, to provide the polyol ether. The molar ratio of polyol to carbonyl compound in the process is greater than 5:1.

A metal nanoparticle colloid solution, metal-polymer nanocomposites, and methods for preparing the same are provided. The metal nanoparticle colloid solution and the metal-polymer nanocomposites can be prepared with a variety of polymeric stabilizers and have uniform particle diameter and shape. The metal nanoparticle colloid solution and the metal-polymer nanocomposites have wide applications, for example, as an antibacterial agent, a sterilizer, a conductive adhesiv, conductive ink or an electromagnetic wave shielder for an image display.

The invention specifically relates to a high-voltage lithium ion battery electrolyte, which belongs to the technical field of lithium ion battery electrolytes. The high-voltage lithium ion battery electrolyte provided by the invention comprises a non-aqueous solvent, a lithium salt and an additive, wherein the additive comprises a mixture of a fluoro-ether additive and an alkyl dinitrile additive. A lithium ion battery using the high-voltage lithium ion battery electrolyte has stable cycle performance at normal temperature, no gas generation at a high temperature condition and small changes of internal resistance. A preparation process for the high-voltage lithium ion battery electrolyte is simple and easy to implement and has good market prospects.

The present invention provides a method for the production of an aqueous dispersion containing an electroconductive polymer component which enables electroconductive thin films which are outstanding in their transparency and electroconductivity to be formed, together with the aqueous dispersion obtained by said method. This method includes a stage in which a 3,4-dialkoxythiophene is polymerized in an aqueous solvent using an oxidizing agent in the presence of a polyanion and, in this stage, said oxidizing agent is added by the dropwise addition of a solution or dispersion containing said oxidizing agent to the reaction solution or, alternatively, in the polymerization stage, the alkali metal ion concentration in the reaction liquid is maintained at no more than 400 ppm.

The invention provides a positive pole material of a lithium ion battery and a preparation method of the positive pole material. Secondary particles of the positive pole material of the lithium ion battery comprise primary particles of lithium-containing multi-transition metal oxide and second-phase materials; in a process of forming the secondary particles through the primary particles, the second-phase materials form second-phase material layers which are distributed on the surfaces of the primary particles, and are diffused with the lithium-containing multi-transition metal oxide through atoms to form diffusion layers so as to enable the second-phase material layers to be combined with the primary particles. Therefore, pulverization of the secondary particles of the positive pole material of the lithium ion battery along interfaces between the primary particles can be effectively suppressed, and the sizes of the primary particles and the secondary particles can be effectively controlled. When the positive pole material is applied to the lithium ion battery, the lithium ion battery is high in specific capacity, good in cycle performance and good in safety performance.

The invention relates to a polyisocyanate curing agent and a preparation method thereof, belonging to the curing agent field. The preparation method comprises the following steps: adopting diisocyanate monomer and a mixture of divalent alcohol and trivalent alcohol to react in cosolvent and obtain branched polyisocyanate, performing hydrophilic chain-extending reaction in the presence of catalyst,adding sealing agent to seal end and protect, adding neutralizer for neutralization and salt-formation, using a small amount of visbreaking protective solvent for dilution to ensure the total mass content to be 50-70% and preparing the ionic room temperature hydrolysis capped polyisocyanate curing agent, wherein, the molar ratio of diisocyanate monomer to divalent alcohol and trivalent alcohol 1:0.1-0.4:0.01-0.20. The invention is a polyisocyanate curing agent with low viscosity, good dispersibility and dendritic molecular structure which can increase the mechanical properties, water resistance and adhesive force of waterborne polyurethane surface material in sport fields and meet the pavement demand of sport fields and venues.

The invention relates to a catalyst for a normal paraffin hydroisomerization reaction and a preparation method as well as an application thereof. The catalyst has the characteristics that the activity is high in an n-hexane hydroisomerization reaction, and the selectivity and stability are good for a double-branched-chain product. The catalyst comprises modified zeolite molecular sieve ZSM-12 treated by alkaline solution and noble metal of family VIII, wherein the zeolite molecular sieve ZSM-12 adopts zeolite molecular sieve ZSM-12 containing organic amine template. The preparation method of the catalyst comprises the following steps of: desilication of zeolite molecular sieve ZSM-12 containing template after being treated with alkaline solution to obtain zeolite molecular sieve ZSM-12 with high content of mesoporous, and preparing isomerized catalyst by loading Pt. The catalyst is applied in the normal paraffin hydroisomerization reaction, when the catalyst is applied, the n-hexane hydroisomerization reaction is carried out on a fixed bed miniature reactor, the reacting raw material n-hexane is fed into the reactor by a force pump, and is contacted with the catalyst to react in the reactor after being mixed with hydrogen in a mixer.

The present disclosure provides a lithium-ion battery positive electrode material and a preparation method thereof. In the lithium-ion battery positive electrode material, a secondary particle comprises lithium-containing multi-element transition metal oxide primary particles and a second phase material, a second phase material forms a second phase material layer distributed on a surface of the primary particle and forms a diffusion layer together with the lithium-containing multi-element transition metal oxide by means of atoms mutual diffusion to make the second phase material layer combined with the primary particle during formation of the secondary particle from the primary particles, thereby effectively suppressing chalking of the secondary particle along boundary among the primary particles, and effectively controlling size of the primary particles and the secondary particles, and improving specific capacity, cycling performance and safety performance of a lithium-ion battery to which the lithium-ion battery positive electrode material is applied.

The invention relates to the technical field of thermoplastic polyurethane elastomer (TPU), and specifically relates to a formula and a production technology of transparent film-grade TPU. According to the invention, 20-40% of diisocyanate, 45-75% of polymer polyhydric alcohol with a molecular weight of 1000-4000, 4-10% of 1,4-butylene glycol, 0.2-1% of an anti-oxidant, 0.2-1.5% of a lubricant, 0.001-0.02% of an environment-friendly catalyst, 0.2-1.0% of an ultraviolet ray absorbing agent, 0-0.8% of a hydrolysis-resisting agent, 0.1-1% of a light stabilizing agent, and 0-2% of other auxiliary agents are processed through steps such as premixing, reacting, dicing and dehydrating, and drying and curing, such that the transparent film-grade TPU is obtained. According to the invention, with the innovations on formula, equipment and technology, a defect of fisheye generation in TPU preparation processes in prior arts is solved. Factors such as a filling manner, an auxiliary agent adding manner, distributive mixing and dispersive mixing effects of an extruder, extruder retention time, and drying and curing are comprehensively considered, such that a stable product with high quality is produced.

The invention relates to a process for indirectly producing alcohol with synthetic gas. The process comprises the steps that the synthetic gas formed by mixing industrial carbon monoxide with hydrogen is taken as a raw material to synthesize methanol; methanol is dehydrated to prepare dimethyl ether; dimethyl ether, carbon monoxide and hydrogen are mixed for carbonylation reaction to prepare methyl acetate; methyl acetate is purified and hydrogenated; a hydrogenated product is purified; and an alcohol product is obtained. An adopted catalyst, the process and a device have the characteristics of high conversion per pass and high effective utilization rate of reaction heat; the load of separating a crude product is reduced greatly; the production flow is shortened; and the production energy consumption is reduced greatly.

The invention belongs to the technical field of anode materials for lithium ion batteries and particularly discloses a doped monocrystal multi-component material for lithium ion batteries and a preparation method of such doped monocrystal multi-component material. The doped monocrystal multi-component material and the preparation method thereof have the advantages that nickel-cobalt-manganese ternary materials are modified, and M-source metals are doped when a precursor is prepared to decrease the material sintering temperature and improve material tapping density, so that the mixed arrangement degree of Ni<2+> in a Li<+> layer is weakened obviously; through high-temperature sintering and tempering processes, the precursor of the multi-composite material, prepared through a coprecipitation method, is more stable in crystal structure, metal ions in the material are inhibited from dissolving through surface coating, side reaction between the metal ions and electrolyte is inhibited, and stability and electrochemical performance of an active material are further enhanced; a doped monocrystal multi-component material finished product is stable in crystal structure, high in safety and compaction density and excellent in rate capability and cycle performance, so that specific capacity and charge-discharge voltage of the material are further enhanced; the preparation method is small in doping quantity, simple to operate, easy to control, widely applicable and suitable for large-scale production.

The invention relates to a high-performance silicon-carbon cathode material and a preparation method thereof. The preparation method comprises the following steps: (1) dispersing silicon into a solvent, carrying out liquid-phase ball-milling, so as to obtain nano-silicon dispersion liquid, adding graphite, and carrying out liquid-phase ball milling so as to uniformly mix nano-silicon with graphite; (2) carrying out granulation on slurry obtained the step (1), so as to obtain graphite / nano-silicon composite particles; (3) carrying out granulation on the product of the step (2) and asphalt by virtue of a mixed kneading-pressing-crushing method, so as to obtain graphite / nano-silicon / asphalt composite particles, and carrying out mechanical fusion so as to realize spheroidization and uniform coating of the graphite / nano-silicon / asphalt composite particles in one step; and (4) carrying out carbonization, scattering and sieving, so as to obtain the high-performance silicon-carbon cathode material. The preparation method is simple and low in cost and can be used for easily producing the high-performance silicon-carbon cathode material in large scale.

The invention provides a method of synthesizing a diketopiperazine of the formula: wherein:R1 is —CH2COR3, or —CH2CH2COR3;R2 is the side chain of an amino acid selected from the group consisting of glycine, alanine, valine, leucine, isoleucine, serine, threonine, aspartic acid, asparagine, glutamic acid, glutamine, lysine, hydroxylysine, histidine, arginine, phenylalanine, tyrosine, tryptophan, thyroxine, cysteine, methionine, norvaline and ornithine;R3 is —OH, —NH2, —OR4, —NHR4, or —NR4R4; andeach R4 is independently an alkyl, aryl, alkylaryl, or arylalkyl.

The invention specifically relates to an electrolyte for inhibiting lithium dendrites and a preparation method thereof, and a lithium battery, belonging to the technical field of lithium batteries. The electrolyte comprises a lithium salt, a nanometer additive, a dispersant and an organic solvent, wherein the concentration of the lithium salt is 0.5 to 10 mol / L, and the mass percent of the nanometer additive is 0.01 to 10%. The nonaqueous electrolyte prepared with fluoride-containing nanoparticles as the nanometer additive enables the battery to have better stability and security and longer service life; the fluoride-containing electrolyte has continuous and stable effect in the battery; compared with traditional film-forming nanometer additives, the fluoride-containing nanoparticles achieves the effect of on-site rapid film formation on the surface of a negative electrode, so the growth of lithium dendrites and side reactions on the surface of a positive electrode are effectively inhibited; moreover, the fluoride-containing nanoparticles stably exist in the electrolyte and is free of problems like decline in effect.

The invention provides a high-nickel cathode material, which comprises a base material and a lithium cobaltate layer, wherein the base material is a compound as shown in a formula I; and the lithium cobaltate layer coats the surface of the base material. The high-nickel cathode material provided by the invention comprises the lithium cobaltate layer; the lithium cobaltate layer can interact with the residual lithium on the surface of the base material, so that the alkali content of the surface of the high-nickel cathode material provided by the invention is relatively low; meanwhile, the lithium cobaltate layer can strengthen intercalation / deintercalation of lithium ions in battery charging and discharging processes; side reaction of the cathode material and electrolyte can also be suppressed; and the high-nickel cathode material provided by the invention has relatively high energy density and long cycle life, so that a lithium-ion battery prepared from the high-nickel cathode material has relatively high capacity, cycle performance and heat stability. The invention further provides a preparation method of the high-nickel cathode material and the lithium-ion battery.

The invention discloses a surface coating method of a 5V lithium ion battery positive pole material LiNi0.5-xMn1.5MxO4, which comprises the following steps: (1) grinding and mixing a coating material or precursor thereof and a positive pole active material in a mass ratio of (1-50):100; (2) dispersing the mixture in a certain liquid-phase medium, and carrying out ultrasonic pulverization; (3) mixing the mixture and the medium by ball milling; (4) filtering and drying; and (5) putting the dried mixture in the step (4) into a pipe furnace, heating in inert gas at the heating speed of 1-30 DEG C / minute, calcining at the constant temperature of 200-500 DEG C for 1-5 hours, carrying out quick cooling or furnace cooling to room temperature, and grinding the coated high-voltage lithium ion battery positive pole material LiNi0.5-xMn1.5MxO4. The product obtained by the method disclosed by the invention has high reversible specific capacity: the capacity retentivity after 500 2C charging / discharging cycles is higher than 95%, and the specific capacity of 5C discharge is more than 96% of 0.2C. The method has the advantages of simple and controllable synthesis technique and uniform coating, and is suitable for industrial production.

The invention discloses a lithium-ion power battery electrolyte for a high / low temperature environment. The electrolyte comprises a lithium salt, an organic solvent and a negative electrode film forming additive. The lithium salt is a mixture of lithium hexafluorophosphate and lithium dis(trifluoromethanesulfonyl)imide or a mixture of lithium hexafluorophosphate and lithium difluoro(oxalato)borate. The organic solvent is a mixture of a carbonic ester solvent and a carboxylate solvent and a volume ratio of the carbonic ester solvent to the carboxylate solvent is 7-9: 1-3. Through modification of the lithium salt, the organic solvent and the film forming additive, charging-discharging, cycle and storage performances of the lithium-ion battery under condition of high / low temperature are obtained, and the problem that the existing lithium-ion power battery electrolyte has a low charging-discharging capacity, a short cycle life and poor storage performances in a high / low temperature environment is solved.

The invention relates to a preparation method of lithium iron silicate cathode material. In the method, ferric saline, Na2SiO3 and lye are added into a reactor in a flowing way; the pH value of the reaction system is controlled, so that the hysrolysis reaction between the ferric iron and the SiO3 can occur; the common deposit of iron and silicon is prepared by filtering and washing; the common deposit of iron and silicon, the lithium source compound, the oxalic acid solution and the carbon source compound are mixedto become pulp state; the Fe is reduced to be Fe through ball milling; the precursor material of lithium iron silicate can be prepared by drying; the precursor material is calcinated under the conditions with the protective atmosphere and at the low temperature to form the agglomerated acidic lithium-iron anode material which is composed of nanoparticles. The method has the strong process adaptability; the industrial production can be easily realized; and the product has higher density and excellent electrochemical properties.

The invention discloses a making method of C1-C4 alkyl ester of nitrous acid, which comprises the following steps: doing the oxidizing reaction and esterifying reaction in two reactors separately; doing the oxidizing reaction in the oxidizing reactor; doing the esterifying reaction in the esterifying tower reactor; inputting nitrogen oxide, oxygen and one or more of inert gas into oxidizing reactor; selecting the nitrogen oxide from one or more composite gas of NO, N2O3, NO2 and N2O4 with NO constantly; making the mole of NO more than the mole of NO2; using 0.15-0.3 m oxygen for each NO m; making the bulk of inert gas at 0-90% corresponding to total gas; inputting the oxidizing reacting product into the esterifying tower reactor to react with C1-C4 alkanol; using 0.8-3.0 m alkanol for each gram atom nitrogen. The invention can transfer heat effectively to reduce by-product, which is smaller than traditional equipment.

The present invention provides a positive active material for a secondary lithium battery, a method of preparing the positive active material, and a secondary lithium battery including the positive active material, wherein the positive active material includes a lithium metal composite oxide core represented by the following Chemical Formula 1, and a coating layer including a fluorine compound and positioned at a shell of the lithium metal composite oxide core.LiwNixCoyMn1-x-y-zMzO2  [Chemical Formula 1](1.2≦w≦1.5, 0<x<1, 0≦y<1, 0.5≦1-x-y-z, and M is at least one metal selected from the group consisting of Al, Mg, Fe, Cu, Zn, Cr, Ag, Ca, Na, K, In, Ga, Ge, V, Mo, Nb, Si, Ti, and Zr).

Catalysts that include at least one catalytically active element and one helper catalyst can be used to increase the rate or lower the overpotential of chemical reactions. The helper catalyst can simultaneously act as a director molecule, suppressing undesired reactions and thus increasing selectivity toward the desired reaction. These catalysts can be useful for a variety of chemical reactions including, in particular, the electrochemical conversion of CO2 or formic acid. The catalysts can also suppress H2 evolution, permitting electrochemical cell operation at potentials below RHE. Chemical processes and devices using the catalysts are also disclosed, including processes to produce CO, OH−, HCO−, H2CO, (HCO2)−, H2CO2, CH3OH, CH4, C2H4, CH3CH2OH, CH3COO−, CH3COOH, C2H6, O2, H2, (COOH)2, or (COO−)2, and a specific device, namely, a CO2 sensor.

The invention discloses a multi-element alloy foam material and a preparation method thereof. The multi-element alloy foam material is a porous alloy material, and consists of two, three or more elements of metallic nickel, molybdenum, cobalt, zinc, ferrum, tungsten, copper and zirconium. In the preparation method, an organic foam material is used as a precursor; and the preparation method comprises the following steps of: performing conductive treatment on the organic foam material; electroplating the organic foam material which is subjected to conductive treatment; taking out the organic foam material from the electroplated organic foam material; and performing heat treatment to prepare the multi-element alloy foam material. The multi-element alloy foam material has a large specific surface area and high hydrogen-evolution catalytic activity, so the multi-element alloy foam material has multiple purposes in functional fields, such as electrolysis hydrogen production industry, battery industry and the like.