Microemulsion synthesizing method for doping nanometer multiphase alpha-Ni(OH)2

A synthesis method and microemulsion technology, applied in chemical instruments and methods, nickel compounds, nickel oxide/nickel hydroxide and other directions, can solve the problems of poor stability, complicated preparation process, high cost, and achieve good electrochemical performance, Easy to control conditions, uniform particle size effect

Inactive Publication Date: 2005-01-26
GUILIN UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

The products synthesized by the chemical co-deposition method have low tap density and poor stability, so they have not been used in the industrial production of batteries; the electrochemical deposition method still needs to improve its process conditions and the cost is high; The preparation of the precursor phase, the preparation process is relatively complicated, and it is difficult to carry out large-scale production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Synthesis of Doped Nanocomposite Ni by Microemulsion Method Using Nickel Sulfate, Sodium Hydroxide, Sodium Carbonate and Aluminum Sulfate as Raw Materials 0.8 al 0.2 (OH) 2 (CO 3 ) 0.1 ·nH 2 O compounds.

[0014] 1. According to the chemical formula Ni of the synthesized product 0.8 al 0.2 (OH) 2 (CO 3 ) 0.1 ·nH 2 O Calculate the amount of various main raw materials.

[0015] Synthesize 1 mole of Ni 0.8 al 0.2 (OH) 2 (CO 3 ) 0.1 ·nH 2 O requires 0.8 moles of nickel sulfate, 0.2 moles of aluminum sulfate, 2.2 moles of sodium hydroxide and 0.1 moles of sodium carbonate. Considering that in order to make the reaction fully complete, 15% sodium hydroxide needs to be added, so the consumption of sodium hydroxide is 2.53 moles.

[0016] 2. According to experiments, it is found that when the consumption of AOT is 1.5 grams and cyclohexane is 50 milliliters, the performance of the prepared product is better.

[0017] 3. Accurately weigh the above raw material...

Embodiment 2

[0020] Synthesis of doped nanocomposite Ni by microemulsion method using nickel sulfate, sodium hydroxide, sodium carbonate and ferric hydroxide colloid as raw materials 0.9 Fe 0.1 (OH) 2 (CO 3 ) 0.05 ·nH 2 O compounds.

[0021] 1. According to the chemical formula Ni of the synthesized product 0.9 Fe 0.1 (OH) 2 (CO 3 ) 0.05 ·nH 2 O Calculate the amount of various main raw materials.

[0022] Synthesize 1 mole of Ni 0.9 Fe 0.1 (OH) 2 (CO 3 ) 0.05 ·nH 2 O requires 0.9 moles of nickel sulfate, 0.1 moles of ferric hydroxide colloid, 0.05 moles of sodium carbonate and 2.1 moles of sodium hydroxide. Considering that in order to make the reaction fully complete, 15% sodium hydroxide needs to be added, so the consumption of sodium hydroxide is 2.415 moles.

[0023] 2. According to experiments, it is found that when the consumption of AOT is 1.8 grams and cyclohexane is 60 milliliters, the performance of the prepared product is better.

[0024] 3. Accurately weigh t...

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Abstract

The invention relates to a synthesizing method of active material of metal hydroxide nickel-battery anode, especially a microemulsion synthesizing method that prepares nano diphase alpha-Ni(OH)2 superfine powder by doping chemical elements. (1) using nickel salt, alkali and sodium carbonate as well as sulphates of doping elements as main raw materials and AOT, organic solvent and cyclohexane as auxiliary raw materials; (2) placing raw materials in a reaction kettle in a certain proportion and in sequence, and making synthetic reaction on a certain condition; (3) placing still, layering, filtering, washing, drying, grinding and scattering the resultant to obtain it. The synthesizing method is simple and convenient to operate and easy to control reacting condition, the synthetic product has uniform crystal grains, able to reach nano level, having good electrochemical performance and suitable to act as active material of metal hydroxide nickel-battery anode.

Description

technical field [0001] The invention relates to a method for synthesizing positive electrode active materials of metal hydride nickel batteries, in particular to preparing nanocomposite α-Ni(OH) by doping chemical elements 2 Microemulsion synthesis method of ultrafine powder. Background technique [0002] The existing commercial Ni-MH battery industry generally uses β-Ni(OH) 2 For industrial production, but due to β-Ni(OH) 2 Only the transfer of one electron is involved in the charge and discharge process. With the development of miniaturization of electronic equipment, the weight and volume of the battery are required to be reduced accordingly, that is, the specific capacity of the battery must be doubled. Obviously, β-Ni( Oh) 2 It is difficult to adapt to the needs of this development trend. Due to α-Ni(OH) 2 During the charge and discharge process, the average ratio of Ni atoms per mole to β-Ni(OH) 2 Nearly 67% higher theoretical capacity, and α-Ni(OH) 2 There is n...

Claims

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Application Information

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IPC IPC(8): C01G53/00C01G53/04H01M4/04H01M4/52
CPCY02E60/12Y02E60/10
Inventor 刘长久钟胜奎柴小琴
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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