Preparation method of spherical nickel hydroxid

A technology of spherical nickel hydroxide and hydroxide, applied in the direction of nickel oxide/nickel hydroxide, etc., can solve problems such as uneven particle size distribution of products, affecting the quality consistency of nickel batteries, and difficult control of process conditions, so as to achieve product consistency Good performance, overcome consistency defects, uniform particle size distribution

Inactive Publication Date: 2007-10-31
HUNAN CORUN NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method also has a prominent defect: difficult control of process conditions, resulting in uneven particle size distribution of each batch of products, which affects the consistency of nickel battery quality. This defect is particularly prominent when nickel batteries are used as power sources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] Add the three reaction materials nickel sulfate, ammonia water and sodium hydroxide into the reaction vessel, the concentration of nickel ion is 2mol / l, the concentration of ammonia water is 8mol / L, and the concentration of sodium hydroxide is 7mol / L. The above three reaction materials are added at the same time and the flow ratio It is nickel sulfate: sodium hydroxide: ammonia water is 1: 0.8-0.9: 0.1, and the nucleation time is controlled to be 25 minutes. After that, the flow ratio of the three materials is adjusted to be 1: 0.5-0.6: 0.1, and the temperature is controlled at 50 -60°C, PH value 13, entering the growth stage, feed-reaction-collection is a continuous overall process, and this process is maintained for 24 hours, which is a cycle. Afterwards, the semi-finished products collected in one cycle are aged, washed, dehydrated, and dried to obtain spherical nickel hydroxide products, thus completing the preparation of one batch of products.

Embodiment 2

[0011] Add the mixed solution of the three reaction materials nickel sulfate and cobalt sulfate, ammonia water and sodium hydroxide into the reaction vessel, the concentration of nickel ion is 1.7mol / l, the concentration of ammonia water is 7mol / L, and the concentration of sodium hydroxide is 6mol / L. The reaction materials are added at the same time and the flow ratio is nickel sulfate: sodium hydroxide: ammonia water is 1: 0.5-0.6: 0.1, and the nucleation time is controlled to be 20 minutes. After that, the flow ratio of the three materials is maintained and the temperature is controlled at 50-60 ℃, PH value is 12, enters the growth stage, feeding-reaction-collection is a continuous overall process, and this process is maintained for 22 hours, which is a cycle. Afterwards, the semi-finished products collected in one cycle are aged, washed, dehydrated, and dried to obtain spherical nickel hydroxide products, thus completing the preparation of one batch of products.

Embodiment 3

[0013] Add the mixed solution of three reaction materials nickel chloride and zinc chloride, ammonia water and potassium hydroxide into the reaction vessel, the concentration of nickel ion is 2.2mol / l, the concentration of ammonia water is 10mol / L, and the concentration of sodium hydroxide is 8mol / L. The three reaction materials are added at the same time and the flow ratio is nickel sulfate: sodium hydroxide: ammonia water is 1: 0.8-0.9: 0.1, and the nucleation time is controlled to be 30 minutes. After that, the flow ratio of the three materials is adjusted to be 1: 0.5-0.6 : 0.1, and the temperature is controlled at 50-60°C, the pH value is 13.5, and enters the growth stage. The addition-reaction-collection is a continuous overall process, and this process is maintained for 24 hours, which is a cycle. Afterwards, the semi-finished products collected in one cycle are aged, washed, dehydrated, and dried to obtain spherical nickel hydroxide products, thus completing the prepara...

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Abstract

The invention discloses a preparing method of sphere nickel hydroxide, which comprises the following steps: adding nickel ion with density at 1. 7 -2. 2mol/L, ammonial solution with density at 7-10mol/L, alkali metal hydroxide solution with density at 6-8mol/L into reactor; making the reaction pass two steps of nucleation period and growing period through controlling flow-ratio and time; controlling the feed, reaction and collection period for 22-24 h; aging the half-finished product; washing; drying; getting the product. This invention possesses simple craft and even grain size distribution, which resolves the problem of 'consistency defect'.

Description

technical field [0001] The invention relates to a preparation method of nickel hydroxide, in particular to a preparation method of spherical nickel hydroxide, a positive electrode active material of a nickel battery. Background technique [0002] Spherical nickel hydroxide is the positive electrode active material of nickel series secondary batteries (nickel-hydrogen, nickel-cadmium, nickel-zinc batteries, etc.). At present, its production methods include buffer solution method, direct generation method, high pressure method, oxidation method, resin exchange method, Alcoholate electrolysis, etc. Compared with other methods, the buffer solution method has simple process principle, convenient operation method, low energy consumption, and relatively low requirements for raw materials and equipment. The prepared spherical Ni(OH) 2 With high packing density and electrochemical activity, it is the current domestic and foreign spherical Ni(OH) 2 The process ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/04
Inventor 张聚东陶维正唐振武戴桂中蒋素斌何亚登陈晓智邓美华彭伟才周小平
Owner HUNAN CORUN NEW ENERGY CO LTD
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