Manufacturing method for electrode slice and electrode slice

Abstract

The invention discloses a manufacturing method for an electrode slice, which comprises the following steps of: 1) manufacturing a conducting basal body; 2) coating an adhesive solution on the surface of the conducting basal body; 3) coating an active substance on the conducting basal body; and 4) rolling the conducting basal body into the electrode slice, wherein the adhesive solution is sprayed on the surface of the conducting basal body by an ultrasonic atomization method in the step 2). The electrode slice manufactured by the manufacturing method for the electrode slice disclosed by the invention has the advantages of uniformity and softness of the electrode slice manufactured through a wet process and also has the advantage of low internal-resistance performance of the electrode slice manufactured by a dry process.

Description

technical field [0001] The invention relates to an electrode sheet of a battery, in particular to a method for making the electrode sheet. Background technique [0002] In recent years, the market demand for secondary batteries for wireless telephones, automobiles, digital processors, portable computers, digital products and other equipment has grown rapidly. Driven by this market demand, high-capacity, low self-discharge, and long-life batteries have been promoted. , high-power and high-safety secondary battery research and development. In particular, rechargeable batteries based on nickel electrodes as positive electrodes, such as nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries, are favored because of their high capacity, high power, and long life. They are an important development direction for secondary batteries today. one. [0003] Alkaline batteries such as cadmium batteries, nickel-metal hydride batteries, and nickel-zinc batteries ar...

AI Technical Summary

Problems solved by technology

However, the preparation of viscous slurry in the wet process requires a large amount of binder. After the conductive substrate is dried, a large amount of excess binder is attached to the conductive substrate, which makes it difficult to activate the battery and the internal resistance of the battery is relatively high. Large, high current performance is poor

Therefore, the advantage of the electrode sheet prepared by the wet process is that it is relatively soft and uniform, but the disadvantage is that the battery made of the prepared electrode sheet is difficult to activate and the internal resistance of the battery is large

However, the electrode sheet made by the dry process is more brittle than the wet electrode sheet, and the electrode sheet is prone to micro-cracks and powder drop during the battery winding process.

Therefore, the advantage of the electrode sheet prepared by the dry process is that the internal resistance of the battery made of the prepared electrode sheet is small, but the disadvantage is that the electrode sheet is not soft and relatively brittle, which leads to serious micro-short circuit and short life of the battery.

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