Preparation method of cathode material lithium nickel cobalt manganese oxide of lithium battery

Abstract

The invention aims to provide a preparation method of a cathode material lithium nickel cobalt manganese oxide of a lithium battery. Soluble nickel, cobalt and manganese salt are taken as raw materials, and the method is characterized by comprising specific process steps as follows: 1) preparation of a nickel-cobalt-manganese precursor through coprecipitation: soluble nickel, cobalt sulfate and manganese chloride are taken as the raw materials, water is added, a nickel, cobalt and manganese salt mixed aqueous solution is prepared, a sodium hydroxide aqueous solution is added as a precipitant, ammonia water is taken as a complexing agent, coprecipitation is performed under conditions of heating and alkali presence, a filtrate and filer residues are obtained through filtering, the filter residues are cleaned, and the nickel-cobalt-manganese precursor is prepared; 2) preparation of a lithium nickel cobalt manganese oxide product through mixing: the prepared nickel-cobalt-manganese precursor is dried, ground and stirred and mixed sufficiently with lithium salt, the mixture is loaded in a bowl, calcined, sintered, broken screened, dried and packaged, and the cathode material lithium nickel cobalt manganese oxide is obtained; the calcining and sintering time and the sintering temperature are controlled. Full-automatic controlled production is adopted in the production process, the production operation is convenient, reaction conditions are mild, and the prepared ternary cathode material lithium nickel cobalt manganese oxide has excellent performance.

Description

[0001] Technical field: [0002] The invention relates to the preparation of a positive electrode material of a lithium battery, in particular to a preparation method of nickel cobalt lithium manganese oxide, a positive electrode material of a lithium battery. [0003] Background technique: [0004] As a new type of green secondary battery, lithium-ion batteries are widely used in wireless communication, transportation, aerospace and other aspects. Lithium-ion batteries are mainly composed of positive electrode materials, lithium-intercalated transition metal oxides, negative electrode materials such as highly graphitized Carbon, separators such as polyolefin microporous membranes and electrolyte materials. The lithium-ion cathode material is a crucial factor restricting the performance of lithium-ion batteries in all aspects. [0005] Lithium-ion battery cathode material is one of the key materials in lithium-ion batteries, and its performance will directly affect the perform...

AI Technical Summary

Problems solved by technology

However, there are many compounds added in the above method, the reaction process steps are too long, and the reaction process cannot be automatically controlled.

Manual operation is labor-intensive, and the reaction process is not easy to control

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