A kind of preparation method of lead-acid storage battery lead paste mixed with graphene

Abstract

The invention discloses a preparation method of a graphene-doped lead acid battery lead paste. The method comprises the following steps: adding 0.1-5 parts of aqueous disperser in 100 parts of deionized water, stirring at high speed and mixing, slowly adding 0.5-5 parts of graphene to prepare a graphene aqueous dispersion liquid; slowly adding 39-130 parts of sulfuric acid with concentration being 98% in 100 parts of deionized water to obtain dilute sulfuric acid; adding 0.1-5 parts of aqueous disperser in the dilute sulfuric acid for stirring at high speed and mixing, slowly adding 0.5-5 parts of graphene to prepare the graphene dilute sulfuric acid dispersion liquid; slowly adding 8-15 parts of the graphene aqueous dispersion liquid in 100 parts of leadoxide mixing material flow for stirring and mixing; adding 5.3-20 parts of graphene dilute sulfuric acid dispersion liquid in the material flow, and stirring and mixing during a conveying process to form a lead paste. The method can fully disperse graphene in a lead acid battery active substance, charge acceptance as well as heavy current charge and discharge performance of the lead acid battery can be greatly increased, and usage life of the storage battery can be prolonged.

Description

technical field [0001] The invention belongs to the field of lead-acid battery manufacturing, and relates to a preparation method of lead-acid battery lead paste mixed with graphene. Background technique [0002] While industry and technology have brought civilization to mankind, resources and the environment are also suffering unprecedented damage. The environment and resources have increasingly become two major challenges facing mankind. The development of electric vehicles has become one of the effective solutions. The core of electric vehicles is the power source. At present, lead-carbon batteries, lithium-ion batteries and flow batteries are the three major development directions of electric vehicle batteries. Among them, the cost of lithium batteries is relatively high, and consistency problems still exist; the cost of flow batteries is also high; and lead-carbon batteries have gradually become a relatively practical and feasible energy storage technology route in the ...

AI Technical Summary

Problems solved by technology

However, the effective dispersion of carbon additives such as graphene in the active materials of lead-acid batteries has been a key factor that has plagued the development of lead-carbon batteries. Since the specific gravity of graphene is quite different from that of lead oxide powder in the active materials of lead-acid batteries, the powder Shaped graphene is very easy to agglomerate and difficult to disperse during the preparation of active materials; and graphene is a nano-material, it is difficult to achieve nano-scale dispersion in the ordinary lead-acid battery active material mixing method so that graphene can be fully dispersed in the active material. As a result, graphene cannot play its advantageous role, and the resulting lead-acid battery cannot achieve the above-mentioned purpose of greatly improving the charging receiving capacity and high-current charging and discharging performance, and prolonging the life of the lead-acid battery.

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