A kind of positive electrode slurry, its preparation method and application

Abstract

The invention discloses a positive pole sizing and a preparation method and application thereof. The method includes the following steps that firstly, an adhesive, a conductive agent, a positive pole active substance and a part of N-methyl-pyrrolidone (NMP) are mixed to obtain a premix; secondly, the premix obtained in the first step is kneaded and stirred; thirdly, the remaining NMP is added and stirred to obtain the positive pole sizing. By means of the method, the overall stirring and pulping time can be shortened to 165-195 min, the solid content of the obtained positive pole sizing is as high as 56+ / -1%, and the cost can be remarkably reduced. When the positive pole sizing is used for preparing negative poles, and the coating production efficiency is increased by 25% and reaches 25-30 m / min.

Description

technical field

[0001] The invention relates to the technical field of electrochemical materials, and relates to a slurry, its preparation method and application, and in particular to a positive electrode slurry, its preparation method and its application in lithium-ion batteries. Background technique

[0002] Lithium-ion batteries have been widely used in portable mobile electronic devices, electric vehicles and energy storage systems due to their advantages such as large specific energy, high working voltage, long cycle life, no memory effect, small self-discharge, no pollution and environmental protection. With the development of lithium-ion batteries, higher requirements are put forward for the consistency and self-discharge rate of batteries, and whether the slurry is uniform and stable directly affects the quality of slurry coating, which in turn affects the consistency and final performance of the battery. The homogenization process of the electrode is mainly related ...

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