Preparation method of lithium battery anode slurry

Abstract

The invention relates to a preparation method of lithium battery anode slurry. The preparation method comprises the following steps of 1, preparing a glue solution through the processes of putting a right amount of N-methylpyrrolidone (NMP) and a right amount of polyvinylidene fluoride (PVDF) into a vacuum dispersator, and carrying out vacuum-pumping and stirring, b, carrying out preblend of a conductive agent, an active material and Li2CO3, adding the mixture of the conductive agent, the active material and Li2CO3 into the glue solution obtained by the step 1, and stirring for 3 to 5 hours, and c, testing viscosity of the solid-liquid mixture obtained by the step b, and adding N-methylpyrrolidone (NMP) into the solid-liquid mixture to adjust the viscosity of the solid-liquid mixture so that the viscosity the solid-liquid mixture satisfies a coating requirement. The preparation method of the lithium battery anode slurry has the advantages of simple operation and preparation processes. The preparation method of the lithium battery anode slurry also has the advantages of improving production efficiency, reducing energy consumption, reducing a total amount of gas produced by subsequent formation of a lithium battery prepared from the lithium battery anode slurry, increasing battery reversible capacity, and realizing the optimal cycle performance.

Description

technical field [0001] The invention relates to a method for preparing lithium battery cathode slurry, which belongs to the technical field of battery materials. Background technique [0002] With the development of microelectronics technology in the 20th century, miniaturized equipment is increasing day by day, which puts forward high requirements on power supply. Lithium batteries have entered a large-scale practical stage. Now, lithium batteries are widely used in mobile phones, notebook computers, power tools, electric vehicles, street lamp backup power, miner's lamps, and small household appliances, which can be said to be the largest application group. [0003] The existing preparation method of lithium battery positive electrode slurry is to add conductive agent and active material into the prepared glue in turn, and then stir and mix successively. In this way, it is not only difficult to stir the mixture evenly, but also the operation is complicated and the steps ar...

AI Technical Summary

Problems solved by technology

[0003] The existing preparation method of lithium battery positive electrode slurry is to add conductive agent and active material into the prepared glue in turn, and then stir and mix successively. In this way, it is not only difficult to stir the mixture evenly, but also the operation is complicated and the steps are cumbersome, which reduces the production capacity. efficiency, increased energy consumption

In addition, the battery made by using the existing positive electrode slurry will generate more gas in the subsequent formation, the battery has a smaller reversible capacity, and the cycle performance is not good.

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