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Method for preparing spherical nickel hydroxide having high power charging-discharging ability

A spherical nickel hydroxide, charge-discharge capability technology, applied in nickel oxide/nickel hydroxide, circuits, electrical components, etc., can solve the problems of resource waste, battery capacity decline, serious polarization, etc., and achieve the effect of convenient post-processing

Inactive Publication Date: 2004-01-14
XIANGTAN UNIV
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Problems solved by technology

However, during the production process of this process, SO 4 2- The anions are relatively high, and the average particle size of the product spherical nickel hydroxide is large, usually 10-30 microns, so that the electrode reaction resistance increases, the polarization is serious, and the battery capacity decreases. It is still difficult to meet the high power of high-rate charge and discharge. The needs of batteries and power batteries. In addition, during the solid-liquid separation of this production method, the content of nickel ions in the filtrate is often high, which still needs to be treated. If it is discharged directly, it will not only cause waste of resources, but also cause environmental pollution.

Method used

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  • Method for preparing spherical nickel hydroxide having high power charging-discharging ability
  • Method for preparing spherical nickel hydroxide having high power charging-discharging ability
  • Method for preparing spherical nickel hydroxide having high power charging-discharging ability

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Experimental program
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Effect test

Embodiment 1

[0018] Embodiment 1, preparation ammonia concentration is 1.5 mol / liter, and the concentration of ammonium salt is 0.5 mol / liter, and the concentration of alkali is 0.02 mol / liter solution as base liquid, joins in the reactor of 1.8 cubic meters, 1.6 mol / liter A mixed solution of 1 liter of nickel sulfate, cobalt sulfate and zinc sulfate, wherein the ratio of the amount of material (moles) containing nickel, cobalt, and zinc elements is 94:1.5:4.5, 25% concentrated ammonia water and 10 mol / liter of hydrogen Sodium oxide solution was added to the above reaction kettle in parallel. The flow rates of nickel sulfate solution, concentrated ammonia water and sodium hydroxide solution were 100 liters / hour, 10.5 liters / hour and 33.6 liters / hour, respectively. The pH value of the solution in the reactor was maintained at 12.0±0.1, the reaction temperature was 60° C., the stirring speed was 180 rpm, the nickel coordination ion concentration was 25 mg / L, and the ammonia content was 13 g / ...

Embodiment 2

[0019]Embodiment 2, the concentration of ammonia in the base liquid is 1.3 mol / liter, the concentration of ammonium salt is 0.8 mol / liter, and the concentration of alkali is 0.01 mol / liter, other by the method for embodiment 1, the rotating speed that improves agitator is 280 rev / min, generate high-density spherical nickel hydroxide after reacting for 8 hours, its physical parameters are shown in Table 1, and the appearance of nickel hydroxide particles is similar figure 1 .

Embodiment 3

[0020] Embodiment 3, the concentration of ammonia in the base liquid is 1.5 mol / liter, the concentration of ammonium salt is 0.5 mol / liter, the concentration of alkali is 0.01 mol / liter, the nickel sulfate solution of 2.1 mol / liter (which contains cobalt sulfate, sulfuric acid Zinc, nickel, cobalt, the ratio of the mass of matter (moles) of zinc element is 94: 1.5: 4.5), 25% concentrated ammonia water and the sodium hydroxide solution of 10 mol / liter flow and add in the reactor of 1.8 cubic meters, The flow rates of nickel sulfate solution, concentrated ammonia water, and sodium hydroxide solution are 100 liters / hour, 13.7 liters / hour, and 44.4 liters / hour, respectively. Maintain the pH value of the suspension system at 12.0±0.1, the concentration of nickel coordination ions is 35 mg / L, the concentration of ligands is 14 g / L, the reaction temperature is 60°C, the stirring speed is 280 rpm, and high density is formed after 8 hours of reaction The spherical nickel hydroxide, its...

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Abstract

A spherical nickel hydroxide used as positive electrode with high-multiple charging-discharging power has a chemical formula: Ni1-xMx(OH)2, where M is chosen from Co, Zn, Cd, Mn, Mg, Ca, Fe, Al and their mixture and x=0.1-15. It is prepared through adding the solution of M's inorganic salt, Ni salt solution, ligand compound solution and alkaline solution to basic liquid in reactor, reacting whilecontrolling Ni ions concentration, pH value and stirring speed, and treating by hot alkali. The battery with it has high specific energy and long service life.

Description

technical field [0001] The invention relates to a preparation method of nickel hydroxide, a positive electrode active material used in alkaline rechargeable batteries, in particular to a preparation method of nickel hydroxide with high charge and discharge capacity. technical background [0002] At present, the total population of the world has reached 6 billion, and it is estimated that it will exceed 10 billion by 2050 (mainly from developing countries). With the increase of population, food, energy and environmental pollution will bring huge pressure to society. For example, oil, one of the energy issues, is speculated that the existing reserves can only be exploited for 30 to 45 years. If we estimate from the relationship between population growth and industrial development, by 2050, the total number of cars in the world will reach 3 billion. (Currently owns a total of 600 million units), followed by problems such as energy consumption and environmental pollution. There...

Claims

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Application Information

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IPC IPC(8): C01G53/04H01M4/52
CPCY02E60/10
Inventor 苏光耀李朝晖高德淑雷钢铁
Owner XIANGTAN UNIV
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