328results about How to "Inhibit oxidative decomposition" patented technology

The invention discloses a lithium ion battery and a positive material, the positive material possesses a core-shell structure, the material of a core layer is at least one of lithium cobaltate, a ternary material and a lithium manganese material, the material of a shell layer is lithium nickel manganese spinel. The preparation method comprises the following steps: preparing the sol shell layer material, then adding the core layer material in the sol, stirring, drying and calcining to prepare the lithium ion battery positive material with the core-shell structure. In addition, the invention also discloses the lithium ion battery prepared by the positive material with the core-shell structure, the end of charge voltage is 4.3-4.7V(vs. Li), the lithium ion battery has excellent charge and discharge cycling performance and high temperature storage performance under high voltage.

The invention provides a molybdate-phosphonate compound corrosion inhibitior and the method for preparing the same. Said corrosion inhibitior comprises of solidum molybdate 1-20 wt%, organic phosphine 1-40 wt%, oxidant 1-10 wt% and excipient 97wt%. The compound corrosion inhibitior is characterized by convenient operation and management and satable corrosion inhibition performance.

The invention discloses a lithium ion secondary battery and an electrolyte thereof. The electrolyte comprises lithium salt, a non-aqueous organic solvent and an additive, wherein the additive contains a compound shown in a general formula (I); in the general formula (I), m is an integer of 0 to 2, n is an integer of 1 to 3, R1, R2 and R3 represent hydrogen atoms, fluorine atoms or C1-C6 straight-chain or branched-chain alkyl or fluoro-alkyl, and Rf1, Rf2, Rf3 and Rf4 represent the hydrogen atoms or the fluorine atoms. The compound shown in the general formula (I) can be used for effectively improving a positive pole / electrolyte interface and suppressing the oxidative decomposition of the electrolyte on the surface of a positive pole. Therefore, the storage performance of the lithium ion secondary battery under the condition of high temperature can be improved, and the cycle performance of the battery cannot be degraded, so that the electrical performance of the lithium ion secondary battery is remarkably improved.

The invention provides an electrolyte for a high-voltage lithium ion battery, and belongs to the field of a lithium ion battery. The electrolyte comprises a non-aqueous organic solvent, a lithium saltand an additive, wherein the non-aqueous organic solvent is an ester solvent, the mass percent of the non-aqueous organic solvent accounts for 95% or above, the lithium salt is LiPF6, the concentration of the lithium salt is (1.0-1.5)mol/L, the additive is a mixture of a dinitrile compound and a boron-containing compound, and the mass percent of the additive accounts for 1-5%. The electrolyte employing the mixture of the dinitrile compound and borate as an electrolyte additive is applicable to a high-voltage positive electrode material LiNi<0.5>Mn<1.5>O<4> system, it is found that the interface impedance of the lithium ion battery positive electrode material can be improved by such the electrolyte, and moreover, the cycle stability of the lithium ion battery under a normal temperature isimproved.

The invention discloses a preparation method of gamma-copper iodide. The preparation method comprises the following steps: adding iodine into water so as to obtain an iodic aqueous solution and adding hydrazine hydrate into the iodic aqueous solution for mixed reaction to obtain an iodide ion solution, wherein the molar ratio of the iodine to the water is controlled at 1:(50-90) and the molar ratio of the hydrazine hydrate to the iodine is controlled at (4.1-4.5):1.0; and adding the iodide ion solution into a copper sulfate solution under the stirring effect, controlling the molar ratio of copper sulfate to iodine at (2.0-2.2):1.0, fully reacting, filtering and drying to obtain gamma-copper iodide. According to the preparation method, the iodine utilization rate is high, a product is less in possibility of being oxidized and decomposed, the production cost is low, and the process is simple.

The invention relates to a developed injection preparation product. A preparation method for a polymer aqueous solution preparation for insoluble medicines of a taxanes antitumor medicine is used to prepare and produce a solution preparation product of the insoluble medicines, thereby the requirements for injection medicine are satisfied. The preparation method adopts technologies in multiple aspects such as surfactant solubilization, hydroxypropyl-beta-cyclodextrin inclusion and PEG cosolvent, PEG-modified phospholipid, additional protective agents, and the like. By adopting the technological method, the solubility of the insoluble medicines in aqueous solution can be dramatically enhanced such as paclitaxel and docetaxel, the dissolving ability of the insoluble medicines in the aqueous solution is enhanced from 2 mg/ml reported in literature to or exceeding 6 mg/ml.

The invention discloses a preparation method of a vitamin C micro-pill, comprising the following process steps: taking auxiliary materials including dextrin, microcrystalline cellulose, citric acid and the like to prepare a vitamin C pill core; taking No. II enteric acrylic resin as a coating material, wherein the concentrating of a coating solution is 4%; and carrying out dynamic coating under the condition that the temperature is 40-50 DEG C to prepare the vitamin C micro-pill with better stability. According to the vitamin C micro-pill prepared by the method disclosed by the invention, the surface of the vitamin C micro-pill is covered so that a formed coating has very good blocking effects on oxygen and water, so as to have a very good protection effect on easily-oxidized vitamin C and improve the stability; and the fineness distribution of the micro-pill is reasonable and the mobility is good, so as to be good for mixing the micro-pill with other auxiliary materials or medicines to carry out preparation production in the next step.

The invention discloses a heavy metal polluted soil solidification and repairing composite compound and a solidification and repairing method. The composite compound comprises the following componentsin percentage by mass: 20-40% of quicklime and 60-80% of an iron-based biochar modified phosphate mineral, wherein the iron-based biochar modified phosphate mineral is obtained by uniformly mixing and drying an iron salt and biomass, further mixing the mixture with a phosphate mineral uniformly and performing co-pyrolysis. The method for solidifying and repairing heavy metal polluted oil by usingthe composite compound comprises the following steps: firstly, uniformly mixing the iron-based biochar modified phosphorate mineral with quicklime so as to obtain the heavy metal polluted soil solidification and repairing composite compound; applying the composite compound into heavy metal polluted soil, adding water, and performing uniform stirring; and performing maintenance of the best standards, so as to complete solidification repairing on the heavy metal polluted soil. By adopting the heavy metal polluted soil solidification and repairing composite compound, secondary dissolution of heavy metals can be greatly avoided, and the long-term stability of solidification of the heavy metal polluted soil can be greatly enhanced.

The invention discloses a lithium ion battery electrolyte suitable for a NCM811 and SiO-C material system and a preparation method. In the electrolyte of the present invention, an organic solvent composed of ethyl methyl carbonate, diethyl carbonate, and ethylene carbonate, a lithium salt composed of lithium hexafluorophosphate and lithium difluorophosphate, and an additive composed of vinylene carbonate, fluoroethylene carbonate, ethylene sulfate, and 1,3-propane sultone are compounded in a certain proportion, and cooperate to react, during a lithium ion battery cycle, on the surface of NCM811 and SiO-C and form a stable solid electrolyte protective film to prevent direct contact between the electrolyte and NCM811 and SiO, thereby reducing the side reactions between the electrode and theelectrolyte, and reducing the phase transition and volume change of the material, and further improving the cycling performance of the lithium ion battery. Experimental results show that by using theelectrolyte of the present invention, the lithium ions of the NCM811 and SiO-C material system has a capacity retention rate of more than 90% after 500 cycles of 1C/1C at room temperature, and has excellent cycle performance.

In order to solve the problems of gas generation during battery high-temperature storage, poor high-temperature cycle performance and the like of the existing lithium ion battery electrolyte, the invention provides lithium ion battery nonaqueous electrolyte. The lithium ion battery nonaqueous electrolyte contains a compound with the structure shown as a formula I shown in description, wherein in the formula I, R1, R2, R3 and R4 are respectively and independently selected from hydrogen atoms, fluorine atoms, cyano-groups, alkyl or halogenated alkyl with the carbon atom number being 1 to 5, oxygen-containing alkyl with the carbon atom number being 1 to 5 and silicon-containing alkyl with the carbo atom number being 1 to 5; X is a -O-R5-CN group; R5 is hydrocarbyl or halogenated alkyl with the carbon number being 1 to 5; m, n, z and y are an integer being 0 or 1; m+n+y+z is not equal to 0. When the nonaqueous electrolyte is used for the lithium ion battery, the decomposition of the electrolyte on the electrode surface can be inhibited; the high-temperature storage performance of the battery is improved; the generated gas is little; the expansion rate of the battery is small, so that the high-temperature cycle performance and the high-temperature storage performance of the lithium ion battery are effectively improved.

The invention provides a fresh keeping agent, a preparation method thereof, and the application of the fresh keeping agent in fresh keeping treatment of dishcloth gourds. The fresh keeping agent comprises chitosan, L-cysteine, cinnamic aldehyde and water, and the pH of the fresh keeping agent is 5.6-6.5. The chitosan can form semipermeable membranes on the surfaces of the dishcloth gourds, so that restraining the loss of water on the cuticle of the dishcloth gourds is facilitated, and the depletion of substances in the dishcloth gourds is delayed; the L-cysteine is beneficial to protecting the color of the cuticle of the dishcloth gourd, restraining the oxygenolysis of cuticle chlorophyll and avoiding generating black spots; the cinnamic aldehyde is beneficial to restraining the dishcloth gourds from infecting pathogenic bacteria microorganisms during storage and restraining the dishcloth gourds from being decomposed; the chitosan, the L-cysteine and the cinnamic aldehyde all contain functional groups which are easy to form hydrogen bonds, so that when synergistic effects of the chitosan, the L-cysteine and the cinnamic aldehyde are exerted, improving the compactability, the inoxidizability and the bacteriocidal property of the semipermeable membranes formed on the surfaces of the dishcloth gourds by the chitosan is facilitated. The pH is controlled within the range, which is close to the autologous pH of the dishcloth gourds, so that further improving the fresh keeping effect of the fresh keeping agent is facilitated.

There is provided a method for production of a conjugated diene from a monoolefin having four or more carbon atoms by a fluidized bed reaction. The method for production of a conjugated diolefin includes bringing a catalyst in which an oxide is supported on a carrier into contact with a monoolefin having four or more carbon atoms in a fluidized bed reactor in which the catalyst and oxygen are present, wherein the method satisfies the following (1) to (3):

• • (1) the catalyst contains Mo, Bi, and Fe;
  • (2) a reaction temperature is in the range of 300 to 420° C.; and
  • (3) an oxygen concentration in a reactor outlet gas is in the range of 0.05 to 3.0% by volume.

The invention provides a lithium ion battery electrolyte suitable for quick charging and a lithium ion battery. By adding a lithium salt compound shown in the formula 1, an imidazole carboxylic estercompound shown in the formula 2 and the lithium difluorophosphate into the electrolyte, when the electrolyte is applied to the lithium ion battery, the high-voltage lithium ion battery suitable for high-rate charging and discharging can have excellent high-temperature storage and low-temperature discharging performance at the same time, wherein the sulfur-oxygen bonds and phosphorus-oxygen bonds in the lithium salt compound shown in the formula 1 jointly form a firm solid electrolyte interface film at a negative electrode, so that the oxidative decomposition of the electrolyte during high-ratecharging and discharging is effectively inhibited; the lithium difluorophosphate can reduce the charging impedance of the negative electrode, so that the sitation that the lithium ions are rapidly transferred in the electrolyte is guaranteed; and meanwhile, the imidazole carboxylate compound shown in the formula 2 can generate a complexing action on the surface of the positive electrode to inhibit the dissolution of metal ions of the positive electrode, so that the polarization side reaction in a battery cell during high-rate charging and discharging is reduced.

The invention belongs to the field of chemistry and chemical engineering, in particular to high voltage lithium ion battery functional electrolyte and a preparation method and application. The high voltage lithium ion battery functional electrolyte is obtained by adding a functional addictive with the mass equivalent to 0.1-5% of the mass of ordinary electrolyte into the ordinary electrolyte, the ordinary electrolyte is formed by cyclic carbonate solvent, linear carbonate solvent and conductive lithium salt. The functional addictive is dialkyl phenyl phosphonic acid salt, the structural formula of the ordinary electrolyte is shown as formula 1, wherein 0<=n<=5. The high voltage lithium ion battery functional electrolyte can remarkably improve circulating stability of a high voltage lithium ion battery under the condition of high temperature and high potential and can be widely applied to the field of lithium ion battery manufacture. (Please find the formula in the specification).

The invention relates to a method for preparing fresh lycium ruthenicum granule medicinal granules, in particular to a method for preparing fresh lycium ruthenicum granule medicinal granules from fresh lycium ruthenicum. The method is characterized by comprising the following steps of firstly, cleaning fresh lycium ruthenicum which is just picked, performing color protection, performing pulping to obtain fruit juice, and then adding the fruit juice and fruit flesh to a colloid mill and a nanoscale superhigh pressure homogenizing machine for wet grinding so as to obtain homogenate; and compounding the homogenate, performing spray drying, and finally, mixing lycium ruthenicum atomized powder with an adhesive for preparing granules, performing drying and then performing packaging. The fresh lycium ruthenicum granule medicinal granules made by the method disclosed by the invention have the functions and pharmacological action of reducing blood lipid, improving immune function, reliving weariness, resisting ageing and the like, particularly have notable effects in respects of resisting oxidation, resisting ageing, and improving immunity of organisms, can reserve activity of functional components to the maximum extent, and are convenient to drink and suitable for various crowds to drink.

The invention discloses a lithium ion battery high-voltage electrolyte solution capable of constructing a double-layer positive electrode surface film, and belongs to the technical field of manufacturing of lithium ion batteries. The electrolyte solution is composed of an organic solvent, a lithium salt and a film-forming additive; the organic solvent is composed of cyclocarbonate, linear carbonate and fluoroethylene carbonate; the film-forming additive is composed of a film-forming additive A, a film-forming additive B and a film-forming additive C, wherein the film-forming additive A is oneof tri(trimethylsilane)borate or tri(trimethylsilane)phosphate, the film-forming additive B is methylene methanedisulfonate, and the film-forming additive C is one of thiophene or 3,4-ethylenedioxythiophene. Through combined use of the three film-forming additives, the electrolyte solution generates double layers of positive electrode surface films with different components, an electrode/electrolyte solution interface can be stabilized, oxidation decomposition of the electrolyte solution and damage of a positive electrode material structure are inhibited, the battery cycle stability and thermal stability are improved, the internal resistance of the battery is reduced, and the battery multiplying power performance is improved.

The invention discloses esomeprazole magnesium enteric capsules and a preparation method thereof. Esomeprazole magnesium is prepared into enteric coated pellets, and the enteric coated pellets are filled into gastric coated capsules. Each enteric coated pellet consists of an empty pellet core, a medicine carrying layer, two isolating layers, an enteric coated layer and a film coating layer. In order to guarantee stability of medicines, alkaline materials are added in the empty pellet cores; alkali stabilizers and antioxidant are added in the medicine carrying layer; and a high-alkalinity modifier and a low-alkalinity modifier are respectively added in the two isolating layers of each enteric coated pellet. In order to guarantee a dissolution effect, surfactant is added in the enteric coated layers; and stability of products is improved owing to the film coating layers wrapping the outer layers of the enteric coated pellets. Owing to optimized formulation and technology of the pellets, smoothness of a technology is improved, work efficiency is also improved, coating time is shortened, consumption of labor and materials is reduced, and production cost is reduced.

Embodiments of the invention provide a non-aqueous organic high-voltage electrolyte additive. The chemical structural formula of the additive is shown in a formula (1); and in the formula, i is 0 or 1, j is 0 or 1, and R1 and R2 are independently selected from the group consisting of oxygen, an alkyl group, a halogenated alkyl group, an alkyloxy group and a halogenated aromatic group. In the process of charging and discharging of a high-voltage lithium ion secondary battery, the non-aqueous organic high-voltage electrolyte additive can promote formation of a layer of a compact and stable SEI protection film on the surface of a positive electrode material, inhibit contact between an electrolyte and electrode active materials and reduce oxygenolysis of the electrolyte on the surfaces of electrodes, thereby improving cycle performance and discharge capacity of the lithium ion secondary battery under the condition of high voltage. Embodiments of the invention also provide a non-aqueous organic high-voltage electrolyte containing the non-aqueous organic high-voltage electrolyte additive and a lithium ion secondary battery.