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Preparation method of cobalt phosphate powder material

A technology of cobalt phosphate powder and bulk material, which is applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of high cost, low yield and high impurity content, and achieves low cost, simple preparation process and high impurity content. low effect

Active Publication Date: 2015-01-07
北京盟固利新材料科技有限公司
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Problems solved by technology

[0007] One is the reaction of soluble cobalt salt and phosphate to generate cobalt phosphate precipitation. Although the method is low in cost, the impurity content is high;
[0008] The other is prepared by heating cobalt pyrophosphate hydrate and water to 250°C in a sealed tube. The disadvantages are low yield and high cost.

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  • Preparation method of cobalt phosphate powder material
  • Preparation method of cobalt phosphate powder material
  • Preparation method of cobalt phosphate powder material

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preparation example Construction

[0028] According to one aspect of the present invention, a kind of preparation method of cobalt phosphate powder material is provided, and the method comprises the following three steps:

[0029] Step 1. Add soluble cobalt salt to the water in container I to prepare aqueous solution A, and add soluble phosphate to the water in container II to prepare aqueous solution B.

[0030] In the above step 1, the soluble cobalt salt is one or more of cobalt chloride, cobalt nitrate and cobalt sulfate.

[0031] Among them, the chemical formula of cobalt chloride specifically mentions: CoCl 2 and CoCl 2 6H 2 O; the chemical formula of cobalt nitrate is specifically mentioned: Co(NO 3 ) 2 ·6H 2 O; the chemical formula of cobalt sulfate specifically mentions: CoSO 4 ·7H 2 O.

[0032] In one of the above steps, the soluble phosphate is one or more of ammonium dihydrogen phosphate, diammonium hydrogen phosphate, sodium dihydrogen phosphate, disodium hydrogen phosphate, potassium dihyd...

Embodiment 1

[0066] 1) Weigh 84.0g CoSO 4 ·7H 2 O was added to 734mL of deionized water in container I to prepare aqueous solution A, and 26.4g (NH 4 ) 2 HPO 4 Add it to 734mL of deionized water in container II to make aqueous solution B;

[0067] 2) Add the aqueous solution B to the aqueous solution A, the reaction temperature is 25° C., and the stirring rate is 200 rpm. After the reaction is completed, the reaction temperature remains unchanged, and ammonia water is added to adjust the reaction system so that the reaction system is neutral;

[0068] 3) Suction filter the reaction system obtained in step 2, wash twice with deionization, then dry at 120°C for 24 hours, and finally pass through a 300-mesh sieve to obtain cobalt phosphate powder material.

[0069] Measured by a Beckman particle size tester: the median diameter (D50) of the obtained cobalt phosphate powder material is 3.1 microns, D10 is 1.2 microns, and D90 is 15.1 microns.

[0070] After ICP detection, the impurity con...

Embodiment 2

[0074] 1) Weigh 87.3gCo(NO 3 ) 2 ·6H 2 O was added to 200mL of deionized water in container I to prepare aqueous solution A, and 26.4g (NH 4 ) 2 HPO 4 Add it to 150mL of deionized water in container II to make aqueous solution B;

[0075] 2) Add aqueous solution B to aqueous solution A at a rate of 3ml / min, the reaction temperature is 60°C, and the stirring rate is 100rpm. After the reaction is completed, the reaction temperature remains unchanged, and the reaction system is adjusted by adding ammonia water dropwise, so that the reaction system is neutral , after adding ammonia water, continue to stir for 0.5h;

[0076] 3) Suction filter the reaction system obtained in step 2, wash with deionization for 3 times, then dry at 150° C. for 24 hours, and finally pass through a 300-mesh sieve to obtain cobalt phosphate powder material.

[0077] Measured by a Beckman particle size tester: the median diameter (D50) of the obtained cobalt phosphate powder material is 12.7 microns...

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Abstract

The invention discloses a preparation method of cobalt phosphate powder material. The method comprises the steps of reacting soluble cobalt salt and soluble phosphate to obtain precipitate cobalt phosphate, and then adjusting the reaction system to be neutral with ammonia water; then carrying out suction filtration on the reaction system, washing, drying, grinding, and screening to obtain the cobalt phosphate powder material. The preparation method is simple, convenient to operate and low in cost; furthermore, the obtained product cobalt phosphate powder material is less in impurity content; the morphology and the particle size of the cobalt phosphate powder material obtained by the preparation technology are controllable, so that the demands on different battery materials can be met.

Description

technical field [0001] The invention relates to the field of lithium ion secondary positive electrode materials, in particular to a preparation method of cobalt phosphate powder material. Background technique [0002] Since Japan's Sony Corporation successfully developed lithium-ion batteries in 1991, after more than 20 years of development, lithium-ion batteries have been widely used in various fields, such as 3C electronic products, electric vehicles, and energy storage. [0003] Lithium-ion battery is a new generation of green high-energy battery. It has the characteristics of high energy, long service life, and low pollution. Among them, the positive electrode material is an important part of lithium-ion batteries and occupies the most important position in the structure of lithium-ion batteries. , its performance directly determines the performance of the final secondary battery product, and its performance and price will directly affect the performance and price of lit...

Claims

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Application Information

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IPC IPC(8): H01M4/1397
CPCC01B25/37C01P2004/03C01P2004/51C01P2004/61H01M4/1397Y02E60/10
Inventor 白珍辉高利亭江卫军魏卫张溪苏迎春
Owner 北京盟固利新材料科技有限公司
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