Anode slurry and preparation method thereof, and application of anode slurry

Abstract

The invention discloses anode slurry and a preparation method thereof, and application of anode slurry. The anode slurry contains ceramic powder, a conductive agent, an anode active material, a binderand a solvent. Because the anode slurry contains ceramic powder, the conductive agent, the anode active material, the binder and the solvent, the high-compaction anode piece prepared by the anode slurry has high liquid absorption and retention, high electrolyte wettability and capability of reducing the soaking time of the high-energy battery electrolyte. Furthermore, the ceramic powder has low cost and low price, so that the cost of the anode slurry is relatively low.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, in particular, the invention relates to negative electrode slurry and its preparation method and application. Background technique [0002] High energy density lithium ion battery is the main development direction at present. In order to pursue high energy density, it is necessary to use high-pressure positive and negative electrode materials and high-pressure sheet production methods, but the high compaction of the electrode sheet will reduce the void space between the materials, which brings electrolyte infiltration. Problems such as difficulty and extreme ease. Among them, insufficient electrolyte infiltration will lead to the following problems: low battery capacity; lithium precipitation on the surface of the negative electrode sheet; decreased battery cycle performance, and even cycle diving; increased internal resistance of the battery. Pole pieces are easy to purify, which...

AI Technical Summary

Problems solved by technology

Among them, insufficient electrolyte infiltration will lead to the following problems: low battery capacity; lithium precipitation on the surface of the negative electrode sheet; decreased battery cycle performance, and even cycle diving; increased internal resistance of the battery

Pole pieces are easy to purify, which will lead to easy breakage during the preparation process, thereby reducing production efficiency and increasing production costs

[0003] At present, most of the existing preparation processes improve the above problems by prolonging the soaking time, but this method also prolongs the battery preparation time, which greatly increases the manufacturing and space costs.

For example, the shelf time at room temperature and high temperature increases, increasing the time cost of producing single cells; expanding the area of ​​the shelving warehouse, increasing the cost of plant infrastructure; turnover shelves and logistics lines, increasing the cost of production line equipment and control costs

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