Method for preparing hexagonal plate cobaltosic oxide

A technology of tricobalt tetroxide and hexagonal flakes, applied in cobalt oxide/cobalt hydroxide and other directions, can solve the problems of long preparation time, cracks on the surface of product hexagonal flakes, etc., achieve uniform particle size, reduce energy consumption and preparation cost, and high yield Effect

Active Publication Date: 2013-05-15
HUNAN YACHENG NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The biggest disadvantage of this method is that the highly toxic substance potassium cyanide is used, the preparation time is long, and the surface of the product hexagonal sheet has cracks

Method used

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  • Method for preparing hexagonal plate cobaltosic oxide
  • Method for preparing hexagonal plate cobaltosic oxide
  • Method for preparing hexagonal plate cobaltosic oxide

Examples

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Effect test

Embodiment 1

[0024] Embodiment 1 The preparation method of hexagonal sheet cobalt tetroxide, comprising the following steps:

[0025] (1) Mixing: the cobalt raw material - CoCl 2 ·6H 2 O, strong alkali saturated solution - sodium hydroxide saturated solution and flux - H 3 BO 3 The sintered material was obtained by stirring at a molar ratio of 1:3:1 for 20 minutes to make it fully mixed, and then placed in an oven for 24 hours at a temperature of 80°C.

[0026] (2) Roasting: After pulverizing the sintered material to 40-80 mesh, transfer it to a roasting crucible, send it to a roasting furnace to heat up at a rate of 5-10°C / min, roast at 750°C for 3 hours, and then cool it naturally, A sintered product was obtained.

[0027] (3) Immersion: the sintered product with the crucible was soaked in 0.1M hydrochloric acid for 1 hour, washed and filtered to obtain a wet product of cobalt tetroxide hexagonal sheet.

[0028] (4) Drying: put the wet product of hexagonal tricobalt tetroxide into a...

Embodiment 2

[0029] Embodiment 2 The preparation method of hexagonal sheet cobalt tetroxide, comprising the following steps:

[0030] (1) Mixing: the cobalt raw material - CoCl 2 ·6H 2 O, strong alkali saturated solution - potassium hydroxide saturated solution and flux - KCl is stirred at a molar ratio of 1:4:5 for 20min to make it fully mixed, and then put into an oven and dried at 80 ° C for 24h After that, a sintered material is obtained.

[0031] (2) Roasting: After pulverizing the sintered material to 40-80 mesh, transfer it to a roasting crucible, send it into a roasting furnace to heat up at a rate of 5-10°C / min, roast at 900°C for 6 hours, and cool it naturally. A sintered product was obtained.

[0032] (3) Immersion: The sintered product with the crucible was soaked in 1M hydrochloric acid for 0.5h, washed and filtered to obtain a wet product of cobalt tetroxide hexagonal sheet.

[0033] (4) Drying: Put the wet product of hexagonal tricobalt tetroxide into an oven, adjust the...

Embodiment 3

[0034] Embodiment 3 The preparation method of hexagonal sheet cobalt tetroxide, comprising the following steps:

[0035] (1) Mixing: the cobalt raw material - CoSO 4 ·7H 2 O, strong alkali saturated solution - sodium hydroxide saturated solution and flux - Na 2 B 4 O 7 ·10H 2 O was stirred at a molar ratio of 1:6:2 for 20 minutes to make it fully mixed, and then placed in an oven for 48 hours at a temperature of 80°C to obtain a sintered material.

[0036](2) Roasting: After pulverizing the sintered material to 40-80 mesh, transfer it to a roasting crucible, send it to a roasting furnace to heat up at a rate of 5-10°C / min, and calcinate at 800°C for 0.5h, then cool it naturally. , to obtain a sintered product.

[0037] (3) leaching: the sintered product with the crucible was soaked in 2M hydrochloric acid for 3 hours, washed and filtered to obtain a wet product of cobalt tetroxide hexagonal sheet.

[0038] (4) Drying: put the wet product of hexagonal tricobalt tetroxide...

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Abstract

The invention relates to a method for preparing hexagonal plate cobaltosic oxide. The method comprises the following steps of: (1) mixing materials, namely uniformly mixing a cobalt raw material, alkali saturated solution and fluxing agent, and drying to obtain a sintering material; (2) roasting, namely crushing and roasting the sintering material, and naturally cooling to obtain sinter; (3) infiltrating, namely placing the sinter in 0.1 to 2.0M hydrochloric acid, soaking, washing and filtering to obtain a cobaltosic oxide hexagonal plate wet product; and (4) drying, namely drying the cobaltosic oxide hexagonal plate wet product to obtain a hexagonal plate cobaltosic oxide product. The hexagonal plate cobaltosic oxide is directly synthesized through calcining at one time, so that the synthesis of precursor precipitate is avoided, the reaction steps, temperature and time are effectively reduced, the energy consumption and preparation cost are reduced, reaction conditions are easy to control, and the large-scale industrial production can be realized conveniently; meanwhile, the product has high purity and yield, uniform particle size and stable performance.

Description

technical field [0001] The invention relates to the technical field of inorganic salt materials, in particular to a preparation method of hexagonal tricobalt tetroxide. Background technique [0002] Cobalt tetroxide (Co 3 O 4 ) is an important functional material, which is the main raw material for the preparation of lithium cobalt oxide, a cathode material for lithium-ion batteries, and is also widely used in supercapacitors, ceramics, catalysts, sensors, magnetic materials and other fields; its preparation methods are many: chemical Precipitation-thermal decomposition method, direct precipitation method, colloidal chemical method, mechanical ball milling method, hydrothermal method, etc. At present, the method of industrialized production is mainly chemical precipitation-calcination method, that is, under the control of temperature, pH value and other process conditions, various thermal decomposition precursors can be prepared, and the morphology and particle size of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/04
Inventor 孟庆芬朱东海刘鑫乃学瑛董亚萍李武
Owner HUNAN YACHENG NEW MATERIAL CO LTD
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