Preparation method of manganese lithium borate anode material cladded by carbon nano tubes of lithium ion battery

Abstract

The invention provides a preparation method of a manganese lithium borate anode material cladded by carbon nano tubes of a lithium ion battery. The method comprises the following steps of: (1) mixing boric acid, lithium nitrate and manganese nitrate at a mol ratio of 1:1:1.01 and dissolving the mixture into distilled water; heating, agitating and evaporating until a colloidal substance is formed; (2) placing the colloidal substance into an oven and drying the colloidal substance at a temperature of 120 DEG C; and grinding and crushing the dried substance to obtain a mixed material; and (3) raising the temperature of the mixed material to 750 DEG C at a speed of 2 DEG C / min under the protection of mixed gas of hydrogen gas and argon gas at a volume ratio of 1:20; and then reacting in the mixed gas of acetylene and the argon gas at the volume ratio of 1:15 for 8 hours at the temperature of 750 DEG C and naturally cooling the product to obtain the anode material. The preparation method has the advantages that: the grain of the prepared anode material is spherical, the grain diameter is uniformly distributed, the electronic conductivity is high and the crystallization degree is high; and the preparation cost of the anode material is reduced and the electrochemical performance of the material is improved at the same time.

Description

technical field [0001] The invention relates to a lithium ion battery cathode material, in particular to a preparation method for a lithium ion battery carbon nanotube-coated lithium manganese borate cathode material. Background technique [0002] Among all kinds of chemical power sources, lithium-ion batteries are widely used in communication equipment, electric vehicles, etc. Tools, energy storage devices, electric vehicles and hybrid vehicles. Lithium-ion batteries are generally composed of positive electrode materials, negative electrode materials, electrolytes, separators, current collectors, and casings. Among these components, positive electrode materials are the most important components of lithium-ion batteries and key materials for energy storage. , and its cost accounts for about 40% of the entire battery. Therefore, the composition, preparation process and performance of the positive electrode material largely determine the final performance and price of the lit...

AI Technical Summary

Problems solved by technology

[0004] The existing preparation method of carbon nanotube-coated lithium manganese borate positive electrode material for lithium ion battery is mainly a high-temperature solid-phase multi-step reaction method under the protection of inert gas, but this kind of synthesis process has too many intermediate steps so that the preparation technology is limited. The process is complex and changeable, excessive energy consumption, high cost and other disadvantages, and the obtained material is not high in purity, large and uneven in size, low in crystallinity, low in electronic conductivity and poor in electrochemical performance. Therefore, this type of The method is not conducive to the realization of industrial mass production

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