Lead powder with lead oxide-graphene core-shell structure and preparation method thereof

Abstract

The invention discloses lead powder with a lead oxide graphene core-shell structure and a preparation method thereof, relates to the technical field of lead-carbon batteries, and is used for solving the problems that in the prior art, the charge retention capacity is reduced, the manufacturing difficulty and cost are increased, and the sulfation weakening effect of a carbon material is reduced. The lead powder comprises lead oxide particles, an activated carbon layer wrapping the lead oxide particles and graphene dispersed in the activated carbon layer, the activated carbon layer is of a porous structure, and the graphene is dispersed in holes of the porous structure. The preparation method comprises the following steps: mixing a lead acetate solution, saccharides and graphene; mixing the alkaline solution with a mixed solution of lead acetate, saccharides and graphene; mixing a surfactant, an emulsifier and the mixed solution containing the lead hydroxide particles to obtain a suspension; and enabling the suspension liquid to be sequentially subjected to spray drying and sintering, and obtaining the lead powder of the lead oxide graphene core-shell structure. The lead powder and the preparation method can be used for the lead-carbon battery.

Description

technical field [0001] The invention relates to the technical field of lead-carbon batteries, in particular to lead powder with a lead oxide graphene core-shell structure and a preparation method thereof. Background technique [0002] As the leading research technology of lead-acid battery, lead-carbon battery has the characteristics of weakening the sulfation of negative electrode and improving the battery's high-current charge and discharge performance. [0003] At present, the research work of lead-carbon batteries mainly includes the following three aspects: on the one hand, the use of capacitive pure carbon negative electrodes, because only the capacitive properties of carbon materials are used, so the charge retention ability is greatly reduced; The carbon negative electrode is connected in parallel with the normal lead-acid battery negative electrode. The complex carbon negative electrode prepared by this process is difficult to match and connect well with the plate, ...

AI Technical Summary

Problems solved by technology

[0003] At present, the research work of lead-carbon batteries mainly includes the following three aspects: on the one hand, the use of capacitive pure carbon negative electrodes, because only the capacitive properties of carbon materials are used, so the charge retention ability is greatly reduced; The carbon negative electrode is connected in parallel with the normal lead-acid battery negative electrode. The complex carbon negative electrode prepared by this process is difficult to match and connect well with the plate, resulting in increased manufacturing difficulty and cost; on the other hand, the high specific surface area of ​​activated carbon and carbon black The carbon material and the negative electrode material are physically mixed to make the negative electrode of the lead-carbon battery. Due to the large difference in density between the carbon material and the negative electrode active material of the lead-acid battery, it is difficult to mix uniformly, which will reduce the effect of the carbon material on weakening sulfation.

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