Preparation method of a new type of high-rate ternary nickel-cobalt-aluminum power battery

Abstract

The invention discloses a preparation method of a novel high-rate ternary nickel-cobalt-aluminum power battery, which belongs to the technical field of new energy sources. The battery includes a positive electrode active material and a negative electrode active material, wherein the positive electrode active material includes the following components in parts by weight: 90-95 parts of ternary nickel-cobalt-aluminum material, 3-4 parts of positive electrode conductive agent, 3-5 parts of polyvinylidene fluoride parts; the negative electrode active material includes the following components in parts by weight: 90-94 parts of artificial graphite, 2-4 parts of water-based binder, 1-2 parts of carbon black, and 2-4 parts of styrene-butadiene rubber. The positive electrode active material obtained by the method of step-by-step feeding and multiple times of stirring is different from other battery materials and has the characteristics of more delicate material and better performance. At the same time, the negative electrode active material is not only the combination of binder and conductive Simply mix, but adjust the viscosity by adding deionized water, so that the negative active material can be better bonded with the positive active material, which is beneficial to battery charging and discharging.

Description

technical field [0001] The invention belongs to the technical field of new energy, and in particular relates to a preparation method of a novel high-rate ternary nickel-cobalt-aluminum power battery. Background technique [0002] The 21st century will enter the era of hybrid electric vehicles (HEV) and electric vehicles (EV). Among the existing power batteries for new energy vehicles, the production cost of lithium-ion batteries is relatively low, and it is very convenient to recharge and utilize. Compared with other portable energy sources, it has a higher cost advantage. Therefore, this type of battery has become the most popular power source at present. The global lithium-ion battery market has maintained continuous positive growth, and the demand for power lithium-ion batteries has also shown a continuous growth trend. [0003] In recent years, my country's lithium-ion battery industry (including batteries, positive and negative electrode materials, separators, electrol...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of current new energy vehicle batteries such as poor comprehensive performance and weak battery life, Publication No. 106784812A improves the preparation method of lithium iron phosphate batteries to make the batteries have the advantages of fast charging and low temperature use

However, the gram capacity and working voltage of lithium iron phosphate batteries still cannot be improved

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