Zirconium added nickel hydroxide and its preparing method

A technology of nickel hydroxide and zirconium hydroxide is applied in the preparation of zirconium-added nickel hydroxide and the field of zirconium-added nickel hydroxide, which can solve the problems of not being able to improve the electrical performance of batteries well.

Inactive Publication Date: 2007-04-11
JIANGSU XINXING CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Judging from the current situation of nickel hydroxide produced by various manufacturers, for special-purpose secondary bat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1, zirconium-added nickel hydroxide, nickel hydroxide coated with embedded zirconium hydroxide, wherein the weight content of zirconium element accounts for 2%, the preparation method is:

[0022] (1) Add water to nickel sulfate, cobalt sulfate, zinc sulfate, and zirconium sulfate to form a mixed aqueous solution of sulfate, wherein: [Ni 2+ ]105-145g / L; [Zn 2+ ]6-9g / L; [Co 2+ ]2-4g / L; [Zr 2+ ]0.2-10g / L;

[0023] (2) Configure ammonia solution, [NH 4 + ] Concentration is 6-9mol / L; Configure sodium hydroxide alkali solution, [OH - ] Concentration is 6-9mol / L;

[0024] (3) Sulphate mixed aqueous solution, ammoniacal liquor, alkaline solution are continuously injected into the reactor simultaneously, react under strong stirring to generate spherical nickel hydroxide, the flow rate of the mixed aqueous solution of sulfate: alkaline solution flow rate: ammonia solution flow rate=100:50:6 , the pH value is 11.5, the temperature is 55°C, and the ion concentration...

Embodiment 2

[0028] Example 2, zirconium-added nickel hydroxide, nickel hydroxide coated with embedded zirconium hydroxide, wherein the weight content of zirconium element material accounts for 0.5%, the preparation method is the same as that of Example 1, wherein the flow rate of the sulfate mixed aqueous solution in the co-precipitation reaction : Alkaline solution flow rate: Ammonia solution flow rate=100: 60: 9, pH value is 12.5, and temperature is 50 ℃; During aging, add sodium hydroxide alkali solution amount in the product reaction solution after co-precipitation is the total weight of precipitate 1%, aged for 2 hours.

Embodiment 3

[0029] Example 3, zirconium-added nickel hydroxide, zirconium hydroxide is coated and embedded in nickel hydroxide, wherein the weight content of zirconium element material accounts for 4%, the preparation method is the same as that of Example 1, and the flow rate of the sulfate mixed aqueous solution in the co-precipitation reaction : Alkali solution flow rate: Ammonia solution flow rate=100: 65: 11, pH value is 13, and temperature is 45 ℃; During aging, add sodium hydroxide alkali solution amount in the product reaction solution after co-precipitation is the total weight of precipitate 0.5%, aged for 1.5 hours.

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Abstract

The present invention relates to positive electrode material for NiH cell and is especially zirconium adding nickel hydroxide material and its preparation process. The nickel hydroxide material with zirconium hydroxide content of 0.1-4 wt% is prepared through a coprecipitation process, in which zirconium salt is added into the nickel hydroxide producing material and made to react together with Ni, Zn, Co and other elements to form the product of nickel hydroxide with embedded zirconium hydroxide. The addition of Zr can raise the high temperature discharge performance and density of the positive electrode material.

Description

technical field [0001] The invention relates to a positive electrode material for a nickel-hydrogen battery, in particular to a zirconium-added nickel hydroxide, and simultaneously provides a preparation method for the zirconium-added nickel hydroxide. Background technique [0002] Nickel hydroxide is used as a positive electrode material for secondary batteries such as nickel hydrogen and nickel cadmium. Judging from the current situation of nickel hydroxide produced by various manufacturers, for special-purpose secondary batteries such as high-temperature batteries, the electrical performance of batteries cannot be improved well for the time being. Now many battery manufacturers, in the production of characteristic batteries, mostly add a small amount of additives to the positive electrode or electrolyte for assistance, so as to achieve the production purpose, such as Chinese patent CN02159508.9 discloses "the preparation method of yttrium-containing spherical nickel hydro...

Claims

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Application Information

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IPC IPC(8): C01G53/04C01G25/00H01M4/52
CPCY02E60/12Y02E60/10
Inventor 杨新民王洪钧杨永成徐燕
Owner JIANGSU XINXING CHEM
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