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Microemulsion rapid precipitation method for preparing amorphous nickel hydroxide electrode active material

An electrode active material, nickel hydroxide technology, used in nickel oxide/nickel hydroxide, alkaline battery electrodes, etc.

Inactive Publication Date: 2005-11-23
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention adopts microemulsion fast precipitation method to prepare amorphous nickel hydroxide electrode active material and has not been reported yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Preparation of Amorphous Ni by Microemulsion Method Using Nickel Sulfate, Sodium Hydroxide and Zinc Hydroxide as Raw Materials 0.8 Zn 0.2 (OH) 2 compound.

[0014] 1. According to the chemical formula Ni of the prepared product 0.8 Zn 0.2 (OH) 2 Calculate the amount of each main raw material used. Synthesize 1 mole of Ni 0.8 Zn 0.2 (OH) 2 Requires 0.8 moles of nickel sulfate, 0.2 moles of zinc hydroxide, and 1.6 moles of sodium hydroxide. At the same time, the amount of cetyltrimethylammonium bromide to be added is 0.4 g, n-butanol is 8 ml, and cyclohexane is 8 ml.

[0015] 2. Accurately weigh the above raw materials and add water to make a solution. Add cetyltrimethylammonium bromide, n-butanol, and cyclohexane to the prepared solution in sequence and place them in the reaction kettle. By controlling the temperature of the water bath at 50° C., the reaction is carried out under stirring for two hours.

[0016] 3. After the reaction of the system is completed...

Embodiment 2

[0018] Preparation of Amorphous Ni by Microemulsion Method Using Nickel Sulfate, Sodium Hydroxide and Magnesium Hydroxide as Raw Materials 0.9 Mg 0.1 (OH) 2 compound.

[0019] 1. According to the chemical formula Ni of the prepared product 0.9 Mg 0.1 (OH) 2 Calculate the amount of each main raw material used. Synthesize 1 mole of Ni 0.9 Mg 0.1 (OH) 2 Requires 0.9 moles of nickel sulfate, 0.1 moles of magnesium hydroxide, and 1.8 moles of sodium hydroxide. At the same time, the amount of cetyltrimethylammonium bromide to be added is 0.6 g, n-butanol is 10 ml, and cyclohexane is 8 ml.

[0020] 2. Accurately weigh the above raw materials and add water to make a solution. Add cetyltrimethylammonium bromide, n-butanol, and cyclohexane to the prepared solution in sequence and place them in a reaction kettle. By controlling the temperature of the water bath at 55° C., the reaction is carried out under stirring for two hours.

[0021] 3. After the reaction of the system is ...

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Abstract

The invention relates to a method for preparing amorphous nickel hydroxide electrode active material, which comprises using nickel salt, alkali and hydroxides of doped metallic elements as the main raw material, using hexadecyl trimethyl-ammonium bromide, normal butyl alcohol, cyclohexane as the auxiliary raw material, and employing micro emulsion fast precipitation method. The nickel electrode synthesized from the material can be used for forming cells with high specific capacity, stable operating voltage and better circularity property.

Description

technical field [0001] The invention relates to a synthesis technology of a metal hydride nickel battery positive electrode active material, in particular to a microemulsion rapid precipitation preparation method of an amorphous nickel hydroxide electrode active material. Background technique [0002] There are no grain boundaries, dislocations, twins, etc. of crystalline particles inside the amorphous material, which affect the electrochemical performance of the material. The disorder is strong, and its electrochemical active points are not limited by the crystal structure, and the structure is stable. , showing many special physical and chemical properties different from crystalline materials, and are closely related to the electrochemical activity of electrode materials. Therefore, research and development of nickel hydroxide electrode active materials from the perspective of amorphous state can overcome the β-Ni(OH) in the current application of MH-Ni. 2 Insufficiency o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/04
CPCY02E60/124Y02E60/10
Inventor 刘长久钟胜奎程洪平袁贵发李珍
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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