Production method of lithium ion battery positive electrode material

Abstract

The invention discloses a production method of a lithium ion battery positive electrode material. The production method comprises the following steps: S1, preparing a lithium salt; s2, mixing and dispersing lithium salt and pure water to obtain a lithium salt mixture; s3, phosphoric acid and iron powder are blended respectively, the blended phosphoric acid and iron powder react with each other, and a ferrophosphorus compound is prepared; s4, hydrogen peroxide, pure water and a lithium salt mixture are added into the ferrophosphorus compound for mixing and grinding, and mixed slurry is obtained; s5, preparing a carbon source; s6, a carbon source is added into the mixed slurry for mixing and grinding, and finished slurry is obtained.The finished slurry prepared through the method is smaller in fineness, a nanoscale slurry product can be obtained, the stacking density of the positive electrode material lithium iron phosphate can be effectively improved or increased, the monomer particle can reach the quality requirement of 0.3-0.5 micrometer, the quality and carbon coating performance are greatly improved, and the application range is wide. And the production purposes of energy conservation and emission reduction can be achieved, conversion to an energy-saving, emission-reduction and low-carbon production mode is facilitated, and the cost is lower.

Description

technical field [0001] The invention relates to an electrode, in particular to a production method of a cathode material of a lithium ion battery. Background technique [0002] The traditional positive electrode material preparation process uses finished lithium source compounds, iron source compounds, phosphorus iron compounds, carbon sources and other additives to be mixed and ground in a certain proportion to prepare positive electrode materials. During the process of mixing and grinding, due to the different characteristics of various compounds, resulting in The particle size of the mixed slurry after grinding is multi-peak linear, which can easily lead to low battery capacity density, low mileage, flammability, etc., that is, the particle size of the mixed slurry after mixing and grinding is uneven, and the quality of the battery product Difficult to improve. Contents of the invention [0003] The purpose of the present invention is to provide a method for producing ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for producing positive electrode materials for lithium-ion batteries, to solve one or more technical problems in the prior art, and at least provide a beneficial choice or create conditions