48results about How to "Suppress flatulence" patented technology

The invention discloses a preparation method of aluminum-oxide-coated nano lithium titanate composite material, which comprises the steps of: adding aluminum salt solution into prepared Li4Ti5O12 suspending liquid under the stirring condition, wherein the adding quantity of the aluminum salt solution is in accordance with the molar ratio as follows: Ti: Al=5: x, and x=0.01-0.55; simultaneously, adding a right amount of ammonia water, and adjusting the pH value to be 8-10; stirring for reaction for 30-50 minutes, and standing still for about 6 hours; after filtering, washing and drying, obtaining precursor of the aluminum-oxide-coated nano lithium titanate composite material; and finally, sintering the obtained precursor of the aluminum-oxide-coated nano lithium titanate composite materialat 400-600 DEG C for 4-10 hours, naturally cooling to be room temperature, and obtaining the aluminum-oxide-coated nano lithium titanate composite material.

The invention discloses electrolyte, a preparation method for the same and a high-voltage lithium ion battery. The electrolyte mainly comprises an organic solvent, conductive lithium salt and an additive, wherein the organic solvent is prepared from more than one of a cyclic carbonate solvent, an aromatic hydrocarbon solvent and a linear solvent; the concentration of the conductive lithium salt in the organic solvent is 0.8 to 1.5mol / L; the using amount of the additive is 0.1 to 10.0 percent based on the weight of the organic solvent, and the additive is a halogenated cyanophenyl compound. After the additive is added into the electrolyte, a polymer film can be formed on the surface of each of a positive electrode and a negative electrode, so that the interface impedance of the electrodes / electrolyte is reduced, the decomposition of the electrolyte on the surface of an electrode material is suppressed, and the prolonging of cycle life of the high-voltage lithium ion battery (higher than 4.4V), the improvement of high / low-temperature performance of the high-voltage lithium ion battery and the suppression of gas expansion of the battery are facilitated.

The invention discloses a battery electrolyte, and also discloses a lithium-ion battery containing the electrolyte. By adding acid anhydride derivative additives to the battery electrolyte, the problem of flatulence of the battery can be improved. At the same time, the acid anhydride derivative The additive contains O, N, Si, F and other elements. When it is used as an electrolyte additive, it has good compatibility with positive and negative electrode materials, which can effectively inhibit battery flatulence and improve battery high-temperature cycle performance.

The invention belongs to the technical field of a lithium ion battery, and particularly relates to an electrolyte applicable to a silicon carbon negative and a lithium ion battery comprising the electrolyte. The electrolyte comprises an electrolyte lithium salt, a non-aqueous organic solvent and an additive. Wherein the additive comprises a negative film formation additive, a fluorine-substitutedphenyl isocyanate compound additive with a formula I structure and a dosilane nitrogen-based compound additive. Compared with the prior art, the actual discharging capability, the cycle stability andthe high-temperature storage performance of a silicon carbon negative electrode lithium ion battery are effectively improved by means of a synergic effect generated by combined application of variousadditives, gas generation is prevented, the problems of volume expansion and pole plate pulverization of the battery during the charge-discharge process are solved very well, and meanwhile, the electrolyte is compatible with relatively good high- and low-temperature performance.

A stock oil composition as a stock oil for production of needle coke or for production of an active carbon for electric double layer capacitor electrode, comprising a first heavy oil of 300 DEG C or higher initial boiling point, 12 mass percent or less asphaltene contents, 50 mass percent or more saturated contents and 0.3 mass percent or less sulfur contents as obtained by vacuum distillation ofpetroleums as residual oil and a second heavy oil of 150 DEG C or higher initial boiling point and 0.5 mass percent or less sulfur contents as obtained by fluid catalytic cracking of hydrocarbon oil.