18 results about "Fluoride" patented technology

Positive electrode active materials are described that have a very high specific discharge capacity upon cycling at room temperature and at a moderate discharge rate. Some materials of interest have the formula Li_1+xNi_αMn_βCO_γO₂, where x ranges from about 0.05 to about 0.25, α ranges from about 0.1 to about 0.4, β ranges from about 0.4 to about 0.65, and γ ranges from about 0.05 to about 0.3. The materials can be coated with a metal fluoride to improve the performance of the materials especially upon cycling. Also, the coated materials can exhibit a very significant decrease in the irreversible capacity lose upon the first charge and discharge of the cell. Methods for producing these materials include, for example, a co-precipitation approach involving metal hydroxides and sol-gel approaches.

The invention relates to an electrolyte for a ternary cathode material lithium ion battery. The electrolyte comprises a lithium salt, organic solvent and an additive, wherein the lithium salt is an imidodisulfuryl fluoride lithium salt of which the concentration is greater than 1 mol/L; the organic solvent comprises cyanogen carboxylate and other non-water organic solvent; the addition mass of the cyanogen carboxylate is 5-35% of the total mass of the organic solvent; the cyanogen carboxylate is a combination of one or more selected from the following structural formulae in the specification; and at least one of R1 and R2 is a cyanogen radical or a cyanogen radical containing group. By using the electrolyte provided by the invention, the cycle performance of the ternary cathode material lithium ion battery at normal temperature can be stabilized, the aging and swelling phenomena of the ternary cathode material lithium ion battery under high-temperature conditions can be inhibited, and the internal resistance of the ternary cathode material lithium ion battery is reduced.

The invention discloses a preparation method of large-molecular weight perfluoropolyether acyl fluoride by negative-ion ring opening polymerization of hexafluoropropylene oxide. The negative-ion ring opening polymerization is carried out on hexafluoropropylene oxide to obtain the acyl fluoride of which the structural formula is CF3CF2 (CF2OCF (CF3)) nCOF under the condition of the composite catalyst which consists of a fluoride-containing organic solvent, alkali metal fluoride and polybasic ether, wherein the average molecular weight of the acyl fluoride is greater than 2000, molecular weight distribution is narrow, and the structure of the acyl fluoride can be converted into the structure of which the tail end is -OH, -COOH and -NH2 due to the activity of the acyl fluoride, so that the technology can be further used for the synthesis of polyester resin, epoxy resin and the like.

The invention relates to an aluminum alloy surface treating technology and particularly relates to an aluminum alloy surface titanium dioxide conversion coating solution and a using method thereof. The aluminum alloy surface titanium dioxide conversion coating solution is an aqueous solution which contains titanium salt and fluoride, and the pH value of the aqueous solution is regulated to 3.5-4.5 by using non-reducing acid. After being pretreated, the surface of aluminum alloy is soaked into the aluminum alloy surface titanium dioxide conversion coating solution for 1-15min, thus a conversion coating is formed on the surface of the aluminum alloy. According to the invention, the chemical conversion treatment is carried out by using titanium salt instead of chromic acid, the surface of the aluminum alloy is etched by using low-concentration fluorine ions, and titanyl sulfate or titanyl nitride is induced to hydrolyze to generate a titanium dioxide conversion coating on the surface of the aluminum alloy, wherein the titanium dioxide conversion coating is uniform in color and luster and excellent in corrosion resistance. The titanium salt is nonpoisonous, the conversion solution is simple in component, no great number of energy is consumed, and no environment hazards are caused, therefore, a clean production process is achieved.

The invention discloses novel rubber good in oil resistance. The novel rubber comprises 15-35 parts of chlorinated ethylene propylene rubber, 20-30 parts of butadiene-acrylonitrile rubber, 25-40 parts of fluoride rubber, 3-7 parts of zinc oxide, 5-10 parts of calcium borate, 3-8 parts of magnesium methacrylate, 10-15 parts of white carbon black, 20-40 parts of paraffin, 12-20 parts of bismaleimide resin, 15-28 parts of phenol-urea-formaldehyde copolycondensation resin, 2-7 parts of 2-(p-benzyl-chloride-sulfhydryl-thioxo) benzimidazole and 15-22 parts of anti-aging agent. The novel rubber is prepared through a process of plastication, mixing, vulcanization, drying, cooling and standing and the like. According to the prepared novel rubber, the use of a rubber material in the environment filled with oil is met, and original rubber performances are not affected. The oil resistance (the expansion rate after oil soaking) of the novel rubber is 6.5-8.5%, the heat-resistant coefficient (the coefficient of thermal aging) is 0.61-0.78, the air tightness is 2.5-2.8 m2/s.Pa, and the tear resistance is 58-63 kN.m.

The invention relates to a preparation method of polyvinylidene fluoride. An emulsifier and a dispersing agent are replaced by increasing the stirring speed. The preparation method disclosed by the invention comprises the following steps: adding a fluorine-containing organic solvent, a vinylidene fluoride monomer, an initiator and a chain transfer agent into a reaction kettle containing paraffin and water, stirring, increasing the temperature to 55-110 DEG C, reacting for 3-8 h, stopping reaction, washing, filtering, and drying to obtain high-purity polyvinylidene fluoride resin. The preparation method disclosed by the invention is simple in post-treatment process; the prepared powdery polyvinylidene fluoride resin has higher purity and better heat stability, physical and mechanical properties and is convenient to control; and thus, the preparation method of the polyvinylidene fluoride resin disclosed by the invention is applied to industrialization production.

A process for the treatment or pretreatment of containers made of aluminum, aluminum-containing alloys, magnesium-containing alloys, iron-containing materials such as steel, coated iron-containing materials such as galvanized steel, or aluminum alloys, tinplate, brass or bronze, in particular the treatment or pretreatment of bags, tubs, bottles, cans, canisters, casks or tubes, wherein the process steps for the treatment or pretreatment take place at the same time as the application of the lubricant, with the agent used for the pretreatment or treatment, which also contains or is a lubricant, not essentially consisting of titanium or zirconium with fluoride and polymer, the lubricant possibly being formed first in the agent for the pretreatment or treatment or in the formation of the coating produced therefrom.

The invention pertains to a fluoropolymer composition based on a thermoplastic vinylidene fluoride (VDF) polymer and a thermoplastic fluorinated elastomer, possessing advantageous performances, including improved compromise between flexibility and stiffness, and suitable for being notably used in the manufacture of parts and accessories of mobile electronic devices, to a method of making the said composition, and to a method of manufacturing said parts from said composition and mobile electronic devices using said parts.

The invention discloses a production method of a vanadium-nitrogen alloy, which comprises the following steps of: uniformly stirring and mixing a powdery vanadium-containing compound, a carbon reducing agent, a binder and a fluoride mineralizer; and performing compression moulding to obtain a regular mixture blank, wherein 138-146 parts of vanadium-containing compound, 43-49 parts of carbon reducing agent, 13-20 parts of binder and 1-5 parts of fluoride mineralizer by weight are mixed; putting the obtained mixture blank into a heat-resistant stainless steel container under the protection of nitrogen atmosphere and performing carbonization reaction pretreatment to obtain a pretreated product; putting the pretreated product into a resistance sintering furnace under the protection of argon or nitrogen atmosphere and performing further carbonization reaction treatment to obtain a treated product; putting the treated product into a nitriding furnace in nitrogen atmosphere and performing nitriding reaction treatment; and cooling and discharging to obtain a product of vanadium-nitrogen alloy. The method disclosed by the invention has a simple structure and short reaction time, and realizes high apparent density, stable quality and high nitrogen content of the product.

The invention discloses a setting agent used after wool stretch and refinement. The setting agent is characterized by comprising, by weight parts, 3-12 parts of trimethylolmelamine, 0.09-0.8 part of boron fluoride, 1.2-2 parts of vinyl chloride-vinyl acetate resin, 4-8 parts of butanone, 6-12 parts of dicumyl peroxide, 4-6 parts of polystyrene foam plastics and 100-120 parts of water. According tothe setting agent, wool which is stretched and refined can be quickly oxidized, and the goal of quick forming is achieved.

A method for cracking hydrocarbons is carried out by making a hydrocarbon contacting with a cracking catalyst. The cracking catalyst consists of molecular sieves 10 - 70wt%, fluoride 0.01 - 5wt%, which is carried by the former, a binding material 10 - 60wt%, and clay 0 - 75wt%. It achieves higher conversion rate of hydrocarbon to produce gasoline with higher octane value.