Alkaline zinc cell complex additive, preparation method thereof and application thereof

Abstract

The invention provides an alkaline zinc cell complex additive, a preparation method thereof and application thereof. The method comprises the step of mixing polyethylene glycol with iminazole to obtain a complex additive for preparing negative electrode liquid and negative electrode zinc cream of the alkaline zinc cell, wherein the negative electrode cover or the current collector of the alkaline zinc cell does not need electroplating or to be replaced with noble metal such as plated indium, and the like; zinc powder does not need to add heavy metal or harmful metal such as mercury, indium, lead and cadmium, and the like; the zinc cream does not need to add rare noble metal compound such as indium oxide, indium hydroxide, lean compound, mercury and compound thereof, and the like, and materials which pollute the environment; the negative electrode liquid does not need to add organic additive with high price; the obtained cell can completely meet the requirement of cell international level in the field of air expansion; and the discharging capacitance is improved at less extent, compared with a common cell. Therefore, the alkaline zinc cell made from the alkaline zinc cell complex additive is environmentally friendly, and has low cost and large market potential.

Description

technical field [0001] The invention relates to the manufacturing technology of alkaline zinc batteries, in particular to a compound additive for alkaline zinc batteries and its preparation method and application. Background technique [0002] my country is a big producer and consumer of alkaline zinc batteries, including alkaline zinc-manganese batteries, zinc-silver batteries, zinc-nickel batteries, and zinc-air batteries. However, due to the high activity of zinc, zinc is easily corroded in alkaline solution, and the corrosion of Zn is the result of the conjugation reaction of Zn anodic dissolution and hydrogen cathodic precipitation. The conjugation reaction is: [0003] Anodizing reaction: [0004] Zn+2OH - ~2e - →ZnO+H 2 o [0005] ZnO+OH - →HZnO 2 - or ZnO 2 2- +H 2 o [0006] Cathodic reduction reaction: [0007] 2H 2 O+2e - →2OH - +H 2 ↑ [0008] The overall response is: [0009] Zn+H 2 O→H 2 ↑+ZnO [0010] The self-discharge of negative elect...

AI Technical Summary

Problems solved by technology

[0012] Plating indium or zinc-indium alloy on the negative electrode current collector and adding mercury, lead, cadmium, indium and other polluting or expensive rare metals to the zinc paste make the battery production process more complicated and the cost is relatively high, which is obviously not in line with modern Social environmental protection, production and consumption concepts

Although some people have developed mercury substitute additives or mercury-free technology, the cost is relatively high, the corrosion inhibition effect is greatly affected by the battery working environment, or the process is complicated, which is extremely unfavorable to the sustainable development of alkaline zinc batteries.

Images