Lithium ion anode material and preparation method thereof

Abstract

The invention relates to a lithium ion anode material and a preparation method thereof. The preparation method comprises the steps that: lithium iron phosphate with certain dynamics is selected as an anode active substance; graphite or carbon black with a uniform texture is selected as a conductive agent; polytetrafluoroethylene is adopted as an adhesive; the anode active substance and the conductive agent are mixed and filled into a ball mill; the mixture is subjected to mixed milling, such that anode powder is obtained; the adhesive is placed into a mixer; dimethylformamide as a solvent is added into the mixer; the mixture is heated and stirred, such that the adhesive is fully dissolved; the anode powder is added into the mixer; the mixture is stirred, such that anode slurry is obtained; the prepared anode slurry is coated on an aluminum foil or an aluminum mesh by using a coating machine; the aluminum foil or the aluminum mesh coated with the anode slurry is placed in a bake-drying machine; the aluminum foil or the aluminum mesh is rolled by using a film rolling machine; the aluminum foil or the aluminum mesh is cut into an appropriated dimension according to a requirement; and two electrode lugs are welded in the pole piece. The lithium ion anode material prepared with the method is advantaged in simple production technology, low cost, good conductivity, and suitability for large-scale productions.

Description

technical field [0001] The invention relates to a preparation method of a positive electrode material, in particular to a lithium ion positive electrode material capable of effectively improving the electrical conductivity of the material and a preparation method thereof. Background technique [0002] Lithium-ion battery, as the latest generation of green high-energy storage battery, developed rapidly in the early 1990s. It has the advantages of high working voltage, high energy density, good cycle performance, and low self-discharge, and has obvious cost-effective advantages. It has been widely used in mobile In phones, notebook computers, and small video cameras. Cathode materials are an important part of lithium-ion batteries, and the performance of cathode materials greatly affects the performance of batteries and determines the cost of batteries. [0003] At present, the manufacturing process of the positive electrode material of the known lithium ion battery is compli...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of complex manufacturing process and high cost of existing lithium ion positive electrode materials, the present invention provides a lithium ion positive electrode material and a preparation method thereof, the method The prepared lithium ion positive electrode material has simple and easy production process, low cost, good electrical conductivity, and is suitable for large-scale industrial production