Method for preparing anode material of ferroferric oxide and carbon composite lithium battery

Abstract

The invention relates to a method for preparing an anode material of a ferroferric oxide and carbon composite lithium battery. The method comprises the following steps of: weighing raw materials according to ferrum elements in a ferrum source and carbon elements in graphite; adding the weighed raw materials and a grinding ball into a ball grinding pot, adding a certain amount of distilled or deionized water into the ball grinding pot, and performing wet ball grinding or directly performing dry grinding; placing the ball grinding pot on a ball grinder, performing ball grinding for certain time at certain rotating speed, and discharging a product; when the ferrum source is hydroxide, chloride or various ferric salts, performing thermal treatment on the product subjected to ball grinding for several hours under the protection of inertia gas; performing magnetic separation on the product to separate out graphite particles which are not composited fully; and finally screening the graphite particles in sequence according to different apertures, drying the product subjected to wet grinding before screening, and screening to obtain the carbon-based ferroferric oxide composite material. The method has the characteristics of low cost, no pollution and simple process, and the material can be produced in a large scale.

Description

technical field [0001] The invention relates to a preparation method of a negative electrode material of a lithium battery, in particular to a preparation method of a negative electrode material of a ferric oxide-carbon composite lithium battery. Background technique [0002] As a new type of chemical power source, lithium-ion batteries have been widely used in various portable electronic devices due to their fast charging speed, long cycle life, good load performance, high energy density and working voltage, safety and no pollution. Production date grows. Lithium-ion battery anode materials, as an important factor to improve the energy and cycle life of lithium-ion secondary batteries, have been extensively studied worldwide. As anode materials for lithium-ion batteries, carbon-based materials have the advantages of high discharge capacity, long cycle life, and low cost. Therefore, as an economical and applicable raw material, most of the anode materials currently used i...

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Problems solved by technology

[0010] But so far, there are no literature and patent reports to prepare composite materials of ferric oxide and carbon by high energy ball milling

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