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co x (oh) y The preparation method of m and its use

A technology of triethanolamine and reaction, which is applied in the field of preparation of CoxyM, can solve the problems of complex preparation process and achieve the effect of simple operation, good electrochemical energy storage performance and uniform size

Inactive Publication Date: 2020-08-04
NINGXIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation process of these methods is relatively complicated, and requires high temperature or relatively harsh environment for reaction synthesis, and each product requires different reaction conditions.

Method used

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  • co <sub>x</sub> (oh) <sub>y</sub> The preparation method of m and its use
  • co <sub>x</sub> (oh) <sub>y</sub> The preparation method of m and its use
  • co <sub>x</sub> (oh) <sub>y</sub> The preparation method of m and its use

Examples

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Embodiment 1

[0032] co x (OH) y The preparation method of M, wherein M is F or Cl or PO 4 3- , including the following steps:

[0033] (1) Mixed organic alcohol amines: the CoM a ·nH 2 O was added to the organic alcohol amine solution, stirred for 30 minutes so that it was completely dissolved to obtain a mixture; wherein M was F or Cl or PO 4 3- ; wherein the organic alcohol amine is at least one of ethanolamine, diethanolamine, triethanolamine, and isopropanolamine.

[0034] (2) Reaction in the reactor: transfer the mixture to a high-pressure reactor for hydrothermal reaction. The temperature of the hydrothermal reaction is 160-200°C, and the reaction time is 6-24 hours. After the reaction, the product is washed by distillation and centrifugation After at least one time, centrifuge and wash with ethanol for at least one time, and then dry at 70°C to obtain a powdery product that is Co x (OH) y M, where M is F or Cl or PO 4 3- .

Embodiment 2

[0036] co 2 (OH) 3 The preparation method of Cl comprises the following steps:

[0037] (1) Mixing organic alcohol amines: Weigh 0.4 g of triethanolamine (abbreviated as TEOA) into a beaker containing 20 mL of distilled water, stir and dissolve to obtain a prepared triethanolamine solution. 1mmol of CoCl 2 .6H 2 O was added to the prepared triethanolamine solution, stirred for 30 minutes until completely dissolved to obtain a mixture;

[0038] (2) Reaction in the reactor: the mixture is transferred to a high-pressure reactor, the volume of the mixture accounts for about 60% of the total volume of the reactor, and a hydrothermal reaction is carried out. The hydrothermal reaction temperature is 200 ° C, and the reaction time is 24 hours. After the reaction was finished, it was naturally cooled to room temperature, and the product was washed by distillation and centrifugation at least once, and then washed by ethanol centrifugation at least once, and then dried at 70°C for 12...

Embodiment 3

[0040] The preparation method of Co(OH)F comprises the following steps:

[0041](1) Mixing organic alcohol amines: Weigh 0.4 g of triethanolamine (abbreviated as TEOA) into a beaker containing 20 mL of distilled water, stir and dissolve to obtain a prepared triethanolamine solution. 1mmol of CoF 2 Add it into the prepared triethanolamine solution, stir for 20 minutes until completely dissolved, and obtain the mixture;

[0042] (2) Reaction in the reactor: the mixture is transferred to the high-pressure reactor, the volume of the mixture accounts for about 60% of the total volume of the reactor, and a hydrothermal reaction is carried out. The hydrothermal reaction temperature is 200 ° C, and the reaction time is 24 hours. Naturally cool to room temperature after the reaction, wash the product by distillation and centrifugation at least once, and then wash it by centrifugation with ethanol at least once, and then dry it at 70°C for 12 hours. The powdery product obtained is Co(O...

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Abstract

The invention provides a preparation method and use of Cox(OH)yM, wherein M is F or Cl or PO4<3->, CoMa.nH2O is added to an organic alcohol amine solution and stirred until completely dissolved to obtain a mixture; and the mixture is transferred to an autoclave for hydrothermal reaction, and after the end of the reaction, a product is washed and dried to obtain the Cox(OH)yM, wherein M is F or Clor PO4<3->. A low temperature hydrothermal method is adopted in the preparation process, and the steps are simple and easy to operate. The product prepared by the method has large specific surface area, uniform size, and good electrochemical energy storage performance, and can be used as a negative electrode material for high performance lithium ion batteries.

Description

technical field [0001] The invention relates to the field of preparation of high-performance inorganic functional materials, in particular to Co x (OH) y The preparation method of M and its use, wherein M is F or Cl or PO 4 3- . Background technique [0002] co x (OH) y M, where M is F or Cl or PO 4 3- , the existing preparation methods usually include microwave hydrothermal method, spray pyrolysis method, sol-gel method. The preparation process of these methods is relatively complicated, and requires high temperature or relatively harsh environment for reaction synthesis, and each product requires different reaction conditions. Contents of the invention [0003] The object of the present invention is to provide a kind of utilizing low-temperature hydrothermal method to prepare Co x (OH) y The M method, while the production method is simple and safe, can use a set of methods and different reactants to synthesize Co with different morphologies. x (OH) y M, where...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G51/08C01B25/37H01M4/525H01M10/0525
CPCC01B25/37C01G51/085C01P2002/72C01P2002/80C01P2004/03C01P2006/40H01M4/525H01M10/0525Y02E60/10
Inventor 梁军芦佳雪柴尧李萌李德利李莉
Owner NINGXIA UNIVERSITY