Preparation method of beta-type nickel oxide hydroxide

Abstract

The invention provides a preparation method of beta-type nickel oxide hydroxide. The method comprises the following steps: mixing nickel hydroxide and an alkaline solution to obtain a mixture with a concentration of hydroxyl ions of 1-1.5 mol / L; mixing the mixture with the concentration of the hydroxyl ions of 1-1.5 mol / L and an oxidizing agent, and performing an oxidation reaction to obtain an oxidation reaction product; and washing the oxidation reaction product, performing filtration, and performing drying to obtain the beta-type nickel oxide hydroxide, wherein the oxidizing agent is at least one selected from hypochlorites and persulfates, and the amount of the oxidizing agent is 105%-150% of a reaction equivalent. The method provided by the invention has low costs and a high conversion rate, is easy to clean, and can be used for mass production.

Description

technical field [0001] The invention belongs to the field of chemistry, and in particular, the invention relates to a preparation method of a positive electrode active material of an alkaline battery, that is, beta-type nickel oxyhydroxide. Background technique [0002] Batteries, such as alkaline zinc-manganese batteries, are commonly used as energy storage means. Compared with zinc-manganese dry batteries, alkaline zinc-manganese batteries have greatly improved in electrical performance and various aspects. With the advancement of technology, more and more electrical appliances require high-rate batteries, such as digital cameras, PDAs, and remote-controlled electric toys. In order to meet the development needs of electrical appliances, the high-rate discharge performance of the battery must be further improved. For example, U.S. Pat. No. 6492062 discloses an alkaline battery whose positive electrode contains nickel oxyhydroxide (NiOOH) as the active material. Compared wi...

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Problems solved by technology

However, the disadvantage of this method is that it takes a long time to feed the ozone, the production cost is very high, the ozone is unstable and toxic, and has potential safety hazards.

In addition, in the document "Preparation and charge-discharge performance of β-NiOOH" ("Applied Chemistry", Volume 18, No. 1, January 2001, pages 76-78), a method of using potassium persulfate to oxidize The method of nickel hydroxide, this method also has deficient place, as the amount of added oxidizing agent is too much, during mass production, does not have cost advantage, and excessive potassium persulfate solid is difficult to clean

[0004] Patent CN 1187270C discloses a preparation method of nickel oxyhydroxide, but the conversion rate of this method is low, only 40%-80%, too much oxidant is added, resulting in waste of resources, and the cleaning efficiency is low, and the economic benefit is not good enough in mass production

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