Preparation method and use of Cox(OH)yM

A PO43-, product technology, applied in chemical instruments and methods, inorganic chemistry, cobalt compounds, etc., can solve problems such as complex preparation processes, and achieve the effects of simple and easy operation, good electrochemical energy storage performance, and uniform size

Inactive Publication Date: 2018-08-31
NINGXIA UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of these methods is relatively complicated, and requires high temperature or rela

Method used

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  • Preparation method and use of Cox(OH)yM
  • Preparation method and use of Cox(OH)yM
  • Preparation method and use of Cox(OH)yM

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Co x (OH) y Preparation method of M, where M is F or Cl or PO 4 3- , Including the following steps:

[0033] (1) Mixed organic alcohol amine: CoM a ·NH 2 O was added to the organic alcohol amine solution and stirred for 30 minutes to completely dissolve to obtain a mixture; where M is 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 the autoclave for hydrothermal reaction. The hydrothermal reaction temperature is 160~200℃, and the reaction time is 6~24 hours. After the reaction, the product is washed by distillation and centrifugation. After at least one time, use ethanol to centrifuge at least one time, and then dry at 70 ℃, the obtained powdery product 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 includes the following steps:

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

[0038] (2) Reaction in the reactor: Transfer the mixture to the high-pressure reactor. The volume of the mixture accounts for about 60% of the total volume of the reactor. The hydrothermal reaction is carried out. The hydrothermal reaction temperature is 200°C and the reaction time is 24 hours. After the reaction, cool to room temperature naturally. After washing the product by distillation and centrifugation at least once, then washing it by ethanol centrifugation at least once, and then drying at 70℃ for 12 hours, the obtained powdery product is Co 2 (OH) 3...

Embodiment 3

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

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

[0042] (2) Reaction in the reactor: Transfer the mixture to the high-pressure reactor. The volume of the mixture accounts for about 60% of the total volume of the reactor. The hydrothermal reaction is carried out. The hydrothermal reaction temperature is 200°C and the reaction time is 24 hours. After the reaction is over, the product is naturally cooled to room temperature, and the product is 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 hours to obtain a powdered product of Co(OH...

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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 and use of M, where 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, and sol-gel method. The preparation processes of these methods are relatively complicated, requiring high temperature or harsh environment for reaction synthesis, and each product requires different reaction conditions. Summary of the invention [0003] The purpose of the present invention is to provide a method for preparing Co with different morphologies by low-temperature hydrothermal method. x (OH) y The M method is simple and safe to make, and at the same time, a set of methods and different reactants can be used to synthesize Co with different morphologies. x (OH) y M, where M is ...

Claims

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Application Information

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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
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