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Preparation method of spherical nickel hydroxide anode material coated with gamma-hydroxy cobalt oxide

A technology of spherical nickel hydroxide and cobalt oxyhydroxide, which is applied in battery electrodes, alkaline storage battery electrodes, electrical components, etc., can solve problems such as too much sieve material, affecting product yield, etc., and achieve high capacity, good battery capacity, The effect of small internal pressure

Inactive Publication Date: 2011-08-03
JIANGMEN CHANCSUN UMICORE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] (3) During the production, the mixed granular matter is sieved with a 20-150 mesh screen, which will produce more materials that cannot pass through the screen, thus affecting the yield of the product

Method used

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  • Preparation method of spherical nickel hydroxide anode material coated with gamma-hydroxy cobalt oxide
  • Preparation method of spherical nickel hydroxide anode material coated with gamma-hydroxy cobalt oxide
  • Preparation method of spherical nickel hydroxide anode material coated with gamma-hydroxy cobalt oxide

Examples

Experimental program
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Effect test

Embodiment 1

[0052] Weigh 5Kg of spherical nickel hydroxide coated with cobalt hydroxide as a precursor and place it in a closed oxidation reactor, heat it to 80°C, and use mechanical stirring for 10 minutes to keep the surface temperature of the precursor uniform. at 500 rpm.

[0053] 200 g of NaOH was weighed and dissolved in deionized water to prepare 250 g of an alkaline aqueous solution with a NaOH mass percentage of 80%, and the temperature of the alkaline aqueous solution was 100° C.

[0054] Add 250g of the above prepared alkaline aqueous solution into the airtight oxidation reactor by spraying, and mechanically stir for 5 minutes, so that the surface of the spherical nickel hydroxide coated with cobalt hydroxide is uniformly infiltrated by the lye, and the mechanically stirred The stirring speed is 500 rpm.

[0055] Access O 2 into a closed oxidation reactor, O 2 The flow rate is 5 meters 3 / hour, and at the same time open the exhaust valve of the closed oxidation reactor to ...

Embodiment 2

[0063] Weigh 5Kg of spherical nickel hydroxide coated with cobalt hydroxide as a precursor and place it in a closed oxidation reactor, heat it to 150°C, and use mechanical stirring for 30 minutes to keep the surface temperature of the precursor uniform. at 50 rpm.

[0064] Weigh 400g of potassium hydroxide (KOH) and dissolve it in distilled water to prepare 1Kg of alkaline aqueous solution with a KOH content of 40% by mass. The temperature of the alkaline aqueous solution is 150°C.

[0065] Add the 1Kg alkaline aqueous solution prepared above into the airtight oxidation reactor by spraying, adopt mechanical stirring, and the stirring time is 20 minutes, so that the surface of the spherical nickel hydroxide coated with cobalt hydroxide is uniformly infiltrated by alkali solution, and the mechanical stirring The stirring speed is 50 rpm.

[0066] Access O 2 into a closed oxidation reactor, O 2 The flow rate is 30 meters 3 / hour, and at the same time open the exhaust valve o...

Embodiment 3

[0074] Weigh 5Kg of spherical nickel hydroxide coated with cobalt hydroxide as a precursor and place it in a closed oxidation reactor, heat it to 130°C, and use mechanical stirring for 20 minutes to keep the surface temperature of the precursor uniform. at 250 rpm.

[0075] Weigh 165g of NaOH and 165g of KOH and dissolve them in tap water and prepare 550g of NaOH and KOH mixed alkaline aqueous solution with 30% by mass of NaOH and KOH respectively. The temperature of the mixed alkaline aqueous solution is 130°C.

[0076] Add 550g of the above-mentioned mixed alkaline aqueous solution into the airtight oxidation reactor by spraying, and use mechanical stirring for 10 minutes, so that the surface of the spherical nickel hydroxide coated with cobalt hydroxide is uniformly infiltrated by the alkali solution, and mechanically stir The stirring speed is 250 rpm.

[0077] Access O 2 into a closed oxidation reactor, O 2 The flow rate is 15 meters 3 / hour, and at the same time ope...

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Abstract

The invention relates to a preparation method of a spherical nickel hydroxide anode material coated with gamma-hydroxy cobalt oxide, comprising the following steps: heating cobalt hydroxide coated spherical nickel hydroxide which is utilized as a precursor, and spraying an alkali metal hydroxide aqueous solution; evenly mixing the precursor with the alkali metal hydroxide aqueous solution; introducing oxygen to oxidize the cobalt hydroxide to convert the cobalt hydroxide into high-valency gamma-hydroxy cobalt oxide; and during oxidation, combining mechanical agitation and ultrasonic agitation to prevent the spherical nickel hydroxide anode material coated with gamma-hydroxy cobalt oxide from gathering and cause alkali metal ions to be embedded into a crystal lattice with the laminated structure of the gamma-hydroxy cobalt oxide. After oxidation reaction is over, a lithium hydroxide alkaline solution at certain temperature is added into an oxidation reaction pot to carry out heat preservation on the spherical nickel hydroxide anode material coated with gamma-hydroxy cobalt oxide; when heat preservation is carried out, mechanical agitation and ultrasonic agitation are adopted to cause the lithium ions to be embedded into the laminated structure of the gamma-hydroxy cobalt oxide; and the obtained spherical nickel hydroxide anode material coated with gamma-hydroxy cobalt oxide is screened by an ultrasonic sieve shaker after being washed and dried.

Description

technical field [0001] The present invention relates to the field of battery materials, and more specifically relates to the preparation method of positive electrode materials for metal hydride nickel batteries (MH / Ni), cadmium-nickel batteries and other batteries with nickel compounds as active materials, such as zinc-nickel batteries, iron Nickel hydroxide (Ni (OH) 2 ) method of preparation. Background technique [0002] At present, automobile emission pollution has become an important factor of urban air pollution. my country's carbon dioxide emission ranks second in the world, and the pressure to reduce carbon dioxide emissions will become greater and greater. In recent years, my country's automobile industry has developed rapidly and has become the world's fourth largest automobile producer and third largest automobile consumer. my country's oil resources are short, and the annual oil imports increase by double-digit percentages. In the context of global resource sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/26H01M4/52
CPCY02E60/124Y02E60/10
Inventor 田吉平刘澧浦刘华力舒长红唐植祥
Owner JIANGMEN CHANCSUN UMICORE IND
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