A kind of active material granulation method for zinc electrode

Abstract

The invention relates to an active substance granulation method used for a zinc electrode, which comprises the following steps: 1) weighting zinc oxide powder, electrolytic zinc powder, a corrosion inhibitor, starch and a forming agent, dumping in a single shaft powder mixer for mixing for 1-3 hours to form mixed zinc powder; 2) sieving the mixed zinc powder in the step 1), then dumping the sieved mixed zinc powder and a polyvinyl alcohol aqueous solution in a three-cylinder powder mixer for granulating for 1-2 hours to form active substance particles; 3) sieving the active substance from the step 2), completing the preparing process of the active substance used for the zinc electrode. According to the invention, the three-cylinder powder mixer is employed, starch and the forming agent are added, so that the prepared active substance has the advantages of uniform granularity, smooth particle and good fluidity, the zinc electrode prepared by the active substance is capable of obviously reducing the attenuation phenomenon of the electrode capacity and finally raising the performance of zinc silver accumulator, the operation is simple and the production efficiency can be enhanced.

Description

technical field [0001] The invention belongs to the technical field of zinc-silver storage batteries, and in particular relates to a method for granulating active materials for zinc electrodes. Background technique [0002] Zinc-silver batteries are widely used in high-power discharge equipment due to their high weight-to-weight ratio, stable discharge voltage, high voltage accuracy, good reliability and safety, etc. [0003] Zinc-silver batteries have obvious disadvantages while having the above-mentioned advantages. In particular, the wet life and cycle life indicators of zinc-silver batteries are on the low side. This is caused by two reasons: 1. The separator is oxidized and corroded after long-term wet storage and circulation, and loses the ability to block the migration of silver ions, resulting in a short circuit of the battery; During use, due to the large volume change of the charge and discharge products, the electrodes will loosen or even sink, resulting in the ...

AI Technical Summary

Problems solved by technology

The deficiencies of the active material prepared by this method are: (1) manual operation, low production efficiency; (2) uneven particle size distribution of the active material after treatment, poor fluidity, and difficulty in powder spreading; (3) zinc after pressing Poor electrode uniformity and obvious capacity fading

Images