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Gamma-hydroxyl nickel oxide and producing process thereof

A technology of nickel oxyhydroxide and oxidant, which is applied in nickel oxide/nickel hydroxide, nickel carbonyl, electrode manufacturing, etc. It can solve the problems of battery positive and negative electrode capacity mismatch, waste of power resources, and poor electrode conductivity. The discharge cycle performance is stable, the discharge specific capacity is improved, and the effect of improving the conductivity

Inactive Publication Date: 2006-05-24
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mismatch between the positive and negative capacities of the zinc / nickel battery also brings a large cost waste to the manufacture of the battery.
[0005] Third, the conductivity of the electrode composed of nickel hydroxide is poor, and the activated electrode active material affects its own discharge efficiency due to its insufficient conductivity, resulting in a low discharge capacity of the battery.
This method also has serious deficiencies: First, the relative content of the γ-nickel oxyhydroxide prepared by this method is difficult to control, because the side reaction of oxygen evolution in the electrode cannot be avoided during the electrolysis process, resulting in incomplete electrolytic oxidation of nickel hydroxide or over-electrolysis And waste power resources; the second, the synthesis process of this method is very complicated, the synthesis cost is high, and lacks practical commercial application value; the third, the process of preparing gamma-nickel oxyhydroxide by this method needs to consume a large amount of electric power, and the production cost is high, resulting in The production cost of batteries is also very high, making it difficult to achieve industrialized and commercialized production

Method used

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  • Gamma-hydroxyl nickel oxide and producing process thereof
  • Gamma-hydroxyl nickel oxide and producing process thereof
  • Gamma-hydroxyl nickel oxide and producing process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The first step takes 1.0 moles of nickel nitrate (Ni(NO 3 ) 2 ·6H 2 O) and 0.01 moles (equivalent to 1% of the moles of nickel salt) of aluminum nitrate (Al(NO 3 ) 3 9H 2 0) dissolve with natural water, be mixed with the reaction solution that 100ml nickel ion concentration is 10M;

[0031] In the second step, 0.5 moles (50% of the moles of nickel ions) of potassium peroxodisulfate (K 2 S 2 o 8 ) and 1.2 moles of Potassium Hydroxide, dissolved in 100ml of natural water to make Potassium Hydroxide with a concentration of 12M oxidant solution;

[0032] The third step is to add the reaction solution to the oxidant solution drop by drop under the condition of stirring with the mixer and dispersing with ultrasonic waves at the same time. Disperse for 20 minutes to obtain a black sol-like nickel oxyhydroxide precipitation product;

[0033] The fourth step is to wash the nickel oxyhydroxide with an appropriate amount of water for 5 times, filter it with suction, and c...

Embodiment 2

[0036] The first step takes 0.05 mole of nickel sulfate (NiSO 4 ·6H 2 O), 0.001 moles (equivalent to 2% of the moles of nickel salt) iron nitrate (Fe(NO 3 ) 3 ·7H 2O) and 0.0015 moles (equivalent to 3% of the moles of nickel salt) cadmium chloride (CdCl 2 ), dissolving with distilled water and being mixed with 500ml nickel ion concentration is the reaction solution of 0.1M;

[0037] The second step takes 0.15 moles (equivalent to 300% of the moles of nickel ions) of potassium peroxodisulfate (K 2 S 2 o 8 ), 1.5 moles of potassium hydroxide, dissolved in distilled water to be mixed with 500ml potassium hydroxide concentration is the oxidizing agent solution of 3M;

[0038] The third step is to add the reaction solution dropwise to the oxidant solution under the condition of agitator stirring and ultrasonic dispersion at the same time, control the reaction temperature at 30°C, and the dropwise reaction time is 5 minutes. In 180 minutes, black sol-like nickel oxyhydroxide...

Embodiment 3

[0042] The first step takes 0.1 mole of nickel chloride (NiCl 2 ·6H 2 O), 0.005 moles (equivalent to 5% of the moles of nickel salt) of ferric chloride (FeCl 3 ), was dissolved in deionized water and was mixed with 500ml nickel ion concentration as the reaction solution of 0.2M;

[0043] The second step takes 0.08 moles (equivalent to 80% of the moles of nickel ions) of potassium peroxodisulfate (K 2 S 2 o 8 ), 3.5 moles of sodium hydroxide, dissolved in deionized water to be mixed with 500ml potassium hydroxide concentration is the oxidant solution of 7M;

[0044] The third step is to add the reaction solution to the oxidant solution drop by drop under the condition of agitator stirring and ultrasonic dispersion at the same time, control the reaction temperature to 35°C, and the dropwise reaction time is 10 minutes. In 60 minutes, black sol-like nickel oxyhydroxide precipitation product was obtained;

[0045] The fourth step is to wash the nickel oxyhydroxide with an ap...

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Abstract

The present invention is gamma-hydroxy nickel oxide and its preparation process. The preparation process includes adding doping metal salt into bivalent nickel salt as main material to compound reaction solution; adding potassium hydroxide or sodium hydroxide into oxidant to compounding oxidant solution; adding the reaction solution into the oxidant solution under stirring and ultrasonic dispersion to obtain hydroxy nickel oxide; washing and drying to constant weight. The prepared gamma-hydroxy nickel oxide has small grain size, homogeneous grain, great specific surface area, high heat stability, high stability in alkali medium, high specific discharge capacity, and other advantages. The gamma-hydroxy nickel oxide may be used as the positive pole material for primary and secondary batteries.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a gamma-nickel oxyhydroxide and a preparation method thereof. Background technique [0002] For traditional Ni / Zn, Ni / Cd, Ni / M-H, Ni / Fe and other alkaline primary and secondary batteries, the positive electrodes are all made of β-nickel hydroxide or doped with Co, Cd, Mn and other compounds as additives. The β-Nickel Hydroxide is produced as the active material. This nickel electrode material mainly has the following three deficiencies: [0003] First, the uncharged state of the nickel hydroxide electrode cannot match the charge of the zinc electrode in the charged state to form a battery that can be discharged immediately, but needs to be charged and formed separately, and it needs to be charged several times before the battery reaches the best performance. , Discharge formation. This brings technical complexity, energy waste, and increased b...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/04H01M4/52C01G53/02C01G53/04
CPCY02E60/10
Inventor 周震涛周环波
Owner SOUTH CHINA UNIV OF TECH
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