143results about How to "Reduce oxidative decomposition" patented technology

A surfactant-containing aqueous antimicrobially effective cleaning agent for hard surfaces includes at least one amphoteric polymer, a quaternary ammonium compound and formic acid. The agent may be used for the cleaning and/or antimicrobial treatment of hard surfaces, in particular in damp rooms such as bathrooms.

The invention discloses an electrolyte additive, a high-voltage electrolyte and a lithium ion battery containing the electrolyte additive. The high-voltage electrolyte is prepared by adding the electrolyte additive into the conventional electrolyte; the conventional electrolyte comprises a non-aqueous organic solvent and lithium salt, wherein the content of the non-aqueous organic solvent is 80-85 percent of the total mass; the mass of the electrolyte additive is 0.01-10 percent of the total mass; and the electrolyte additive is maleic anhydride C4H2O3 or one of derivatives thereof and has the structure formula as shown in the abstract. According to the high-voltage electrolyte, a stable interfacial film can be formed on the surfaces of a positive electrode and a negative electrode, the reaction activity on the electrode surface is inhibited, oxidative decomposition of the electrolyte is reduced, and gas swelling is effectively inhibited, so that the safety performance and the cycle performance of the lithium ion battery under normal pressure and high voltage are improved and the service life of the lithium ion battery under normal pressure and high voltage is prolonged. The electrolyte is simple in preparation process and is suitable for industrial production.

The invention discloses a preparation method of lithium ion battery coating pole piece. The preparation method comprises following steps: (1) weighing and dissolving a binder in a solvent, vacuum stirring for 1 to 10 hours to obtain a homogenous solution; (2) adding solid electrolyte powder to the solution prepared in the step (1), vacuum stirring for 1 to 12hours to obtain a solid electrolyte-binder-solvent mixture; (3) evenly coating the mixture prepared in the step (2) on the surface of the battery anode electrode, obtaining a solid electrolyte coating layer, which has a dry thickness between 2 and 5 [mu]m, after the mixture dries; (4) rolling the whole anode electrode prepared in the step (3) with a roller machine, and obtaining the lithium ion battery coating pole piece. The preparation method adds a solid electrolyte layer between the electrolyte liquid and the electrode active material, so that in the situation that active material lithium ion de-intercalation is not affected, contact between active material and electrolyte liquid can be effectively prohibited, oxygenolysis of electrolyte liquid under high voltage is reduced, and battery circulation lifetime is increased.

A granulate for particulate detergents or cleaning agents, the granulate containing a detergent or cleaning agent active ingredient and an outer encapsulation layer formed of polyvalent metal salts of an unbranched or branched, unsaturated or saturated, mono- or polyhydroxylated fatty acid having at least 12 carbon atoms or a mixture of the salts. Also, a process for making the granulate by applying to the granules an encapsulation material that comprises one or more polyvalent metal salt or salts, preferably in the form of an aqueous dispersion in a fluidized bed process.

The disclosed electrode piece of LiMn2O4 is modified by polymer, which contains functional group of possessing complexation capability with Mn ion. The electrode piece solves issue of difficulties for cladding oxide and thin grains in LiMn2O4 material modified by conductive polymer as well as issue of easy dropping-out clad caused by regrinding. Since effects of complexation and valence bond between polar group of polymer and Mn ions at surfaces of LiMn2O4 grains, oxygenolysis ability of Mn4+ ions for electrolyte and disproportionation degree happened in Mn3+ ions are reduced so as to prevent digestion and migration of lithium ions and increase cyclical stability in high temperature of lithium cell by using LiMn2O4 as positive pole. Features of preparing technique are: simple, feasible and value of industrialization.

The present invention is an agent for treating a hard surface comprising at least two components selected from the group consisting of (a) multi-armed stellate polyalkoxylates; (b) polyesteramides; and (c) copolymers prepared from a quaternary ammonium acrylamide and acrylic acid. The agents of the present invention find use in cleaning hard surfaces and/or providing a soil-repellant finish to hard surfaces such as ceramic, glass, stainless steel and plastic.

The invention belongs to the technical field of the lithium ion battery, and discloses a high-voltage functional electrolyte and a preparation method and an application therefor. The high-voltage functional electrolyte is prepared by adding a functional additive into the common electrolyte, wherein the functional additive accounts for 0.25-5% of the common electrolyte based on mass percentage; and the structural formula of the functional additive is as shown in the formula (1). The functional additive which is diethyl (thiophene-2-methyl) phosphate can be used as the high-voltage film-forming agent and the flame-retardant additive of the lithium ion electrolyte; the electrolyte containing the functional additive is non-combustible; and the room-temperature and high-temperature cycling performances of the lithium ion battery prepared from the electrolyte are both improved under 3-5.0V, so that the high-voltage functional electrolyte is wide in the application prospect.

The present invention is nanometer modified photocatalytic bamboo charcoal and its preparation process. The preparation process includes the steps of: high pressure spraying nanometer hybridized and red shifted anatase type titania in fineness of 4-7 nm and in the mass fraction of 1-5 to 500 to the surface of bamboo, high temperature sealed heating at 100-800 deg.c for 20-25 days to carbonize, and crushing. It has bamboo charcoal grain size of 3-10 mm, fixed carbon content of 78-85 wt% and titania content of 0.2-1 wt%. Compared with common bamboo charcoal purificant, the present invention has powerful adsorption on vapor, harmful matter, impurity, etc, capacity of irreversibly decomposing adsorbed harmful matter and antibiotic effect. It has also longer photocatalytic response wavelength and higher air purifying effect.

The invention discloses a high-voltage electrolyte for a lithium ion battery and the lithium ion battery. The electrolyte comprises the following raw materials of a lithium salt, a non-aqueous solvent, an additive A and an additive B, wherein the non-aqueous solvent is a mixed solvent of linear carbonate ester and cyclic carbonate ester, the additive A is a benzothiophene or dibenzothiophene solvent, and the additive B is propenyl-1, 3-sultone. In the high-voltage electrolyte for the lithium ion battery and the lithium ion battery, a solvent containing a sulfur element is used as a high-voltage additive of the lithium ion electrolyte, oxidization and decomposition of the carbonate solvent on a surface of an electrode can be reduced, the propenyl-1, 3-sultone has good negative electrode film formation performance, a negative electrode material can be effectively coated, and the room-temperature cycle property under a high voltage can be greatly improved.

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.

The invention relates to a positive electrode plate and a preparing method thereof and a lithium ion battery. The positive electrode plate aims at solving the problems that for a positive electrode plate in the prior art, under the situation of high charging voltage, the battery circulation performance and the high-temperature storage performance are poor. The positive electrode plate comprises a positive electrode current collector and a positive electrode material layer attached to the surface of the positive electrode current collector. A poly-dopamine layer is further attached to the surface of the positive electrode material layer. Meanwhile, the invention discloses the preparing method of the positive electrode plate and the lithium ion battery with the positive electrode plate. The battery circulation performance and the high-temperature storage performance of the lithium ion battery prepared from the positive electrode plate are excellent under the situation of high changing voltage.

The invention discloses a process for preparing copolyether polyphenylene sulfide composite fiber, raw materials use copolyether polyphenylene sulfide resins which are 80-100 percent by weight, polyester resins which are 5-0 percent by weight, and polyetheretherketone which is 15-0 percent by weight are used in a resin premixed compound treatment. After being stirred and mixed in a high speed, the raw materials are extruded by an extruder, and compound resin resins are obtained, and the weight average molecular weight of polyphenylene sulfide copolymer resin is 40-50 thousand. A spinning extruder has eight temperature ranges, a first range is 150 DEG C, a second range is 300 DGE C, a third range is 315 DGE C, a forth range is 330 DGE C, a fifth range is 330 DGE C, a sixth range is 315 DGE C, a seventh range is 300 DGE C, and an eighth range is 300 DEG C. The holding temperature of a spinning box is 325 DEG C, the crystal curing temperature is controlled at 256 DEG, the drafting rate of strand silk is 6-6.8 times, the roll-up speed of raw silk is 2300-2600 m/min, and the temperature range of crystal curing of the strand silk is 480-510m. The fracture strength of the manufactured copolyether polyphenylene sulfide composite fiber is 7.3 cm/dtex, and the average limited oxygen index is bigger than 47.

The invention provides a high-voltage additive and a high-voltage electrolyte for a lithium battery. The high-voltage additive is a compound containing cyclic enamine and a thiophosphonate structure;the structural formula I is shown in the specification, wherein R1 and R2 are respectively one of an alkyl group with 1-8 carbon atoms, a halogenated alkyl group, an alkenyl group with 2-8 carbon atoms, a halogenated alkenyl group, an alkynyl group with 2-8 carbon atoms, a halogenated alkynyl group, an aryl group with 6-8 carbon atoms or a halogenated aryl group. According to the high-voltage additive, a stable and compact CEI film can be formed on a positive electrode, transition metal ions on the surface of a positive electrode material are stabilized, oxygen precipitation of the positive electrode material is inhibited, and oxygenolysis of an electrolyte is reduced; and a film can be formed on the negative electrode, so that the stability of a negative electrode SEI film is improved, and the performance of the lithium battery under a high-voltage condition is improved.

The invention discloses a preparation method of a modified lithium nickel manganese oxide cathode material. The preparation method comprises the following steps: at first, mixing cerium-iron composite compounds with lithium salts, nickel salts, and manganese salts, carrying out ball milling to disperse the mixture, carrying out vacuum drying to obtain a cerium-iron composite compound coated precursor of a lithium nickel manganese oxide material; burning the precursor for 5 to 20 hours at a constant temperature of 700 to 1000 DEG C in air atmosphere, and naturally cooling the precursor to obtain the modified lithium nickel manganese oxide cathode material. The cerium-iron composite compound is coated on the surface of lithium nickel manganese oxide, a stable protective layer is formed, the contact between electrolyte and lithium nickel manganese oxide is reduced, the oxidation and degradation of electrolyte on the anode surface are reduced, thus the chemical stability of the anode material in a cell system is improved, and at the same time, the circulation performance is enhanced.

The invention belongs to the field of a lithium ion battery material, and discloses an electrolyte additive and an electrolyte comprising the additive, and a lithium secondary battery. The electrolyteadditive is 4-methyl-N-tosyl benzene sulfonamide. A cyclic carbonate solvent and a linear carbonate solvent are mixed, and then are subjected to purification, impurity removal and dewatering, and a conductive lithium salt is added in the room temperature condition to obtain a common electrolyte; and next, an additive which accounts for 0.5-3.0% of the mass of the common electrolyte is added to the common electrolyte to obtain the final electrolyte. By taking 4-methyl-N-tosyl benzene sulfonamide as the additive of the lithium ion electrolyte, the cycle performance of the lithium secondary battery at a high pressure is improved.