Preparation method of lithium battery cathode slurry

Abstract

The invention discloses a preparation method of lithium battery positive electrode slurry. The method comprises the following steps: 1, preparing raw materials, and smashing an alloy to obtain alloy powder, wherein the alloy comprises the following components by mass: 25% of chromium, 18% of aluminum, 12% of iron, 9% of copper, 2% of carbon, 1.5% of boron, 0.2% of silicon, 0.15% of molybdenum, 0.1% of cerium, 0.05% of silver and the balance nickel, and the particle size of the alloy powder is less than 40 micrometers; 2, mixing and stirring conductive carbon black, a binder, lithium cobalt oxide, N-methyl pyrrolidone and the alloy powder at step 1 according to a mass ratio of 15: 45: 35: 80: 5 until the viscosity is 8,000 MPa.s, stopping stirring, performing sieving through a 200-mesh sieve, and taking the screen underflow to obtain the lithium battery positive electrode slurry. The method has the beneficial effect of improving the capacity retention ratio of the battery.

Description

technical field [0001] The invention relates to the field of lithium batteries. More specifically, the present invention relates to a preparation method of lithium battery cathode slurry. Background technique [0002] Lithium batteries have the characteristics of light weight, high capacity, high working voltage, and long service life, and can be widely used. However, human beings have higher and higher requirements on the performance of lithium-ion batteries. For example, after cyclic charging and discharging, the capacity retention rate of batteries will drop rapidly , and the more the number of cycles, the faster the capacity retention rate declines, and the factor that has the greatest impact on the capacity retention rate of lithium batteries is the positive electrode slurry. Therefore, it is a person skilled in the art to study a positive slurry that can improve the capacity retention rate. Worth thinking about. Contents of the invention [0003] It is an object of...

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Problems solved by technology

[0002] Lithium batteries have the characteristics of light weight, high capacity, high working voltage, and long service life, and can be widely used. However, human beings have higher and higher requirements on the performance of lithium-ion batteries. For example, after cyclic charging and discharging, the capacity retention rate of batteries will drop rapidly , and the more the number of cycles, the faster the capacity retention rate declines, and the factor that has the greatest impact on the capacity retention rate of lithium batteries is the positive electrode slurry. Therefore, it is a person skilled in the art to study a positive slurry that can improve the capacity retention rate. worthy of consideration

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