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Method for preparing beta-Ni(OH)2 flower-like microsphere

A microsphere and flower-like technology, which is applied in the field of preparing β-Ni2 flower-like microspheres, can solve the problems of poor repeatability and achieve the effects of low cost, simple process, and easy large-scale synthesis

Inactive Publication Date: 2014-01-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the flower-like morphology of β-Ni(OH) 2 have many advantages, but their controlled synthesis remains the greatest challenge for researchers
[0003] Usually, nickel hydroxide is produced by the direct reaction of nickel salt and alkali, but the rapid hydrolysis rate of nickel salt makes the repeatability of the preparation process poor

Method used

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  • Method for preparing beta-Ni(OH)2 flower-like microsphere
  • Method for preparing beta-Ni(OH)2 flower-like microsphere
  • Method for preparing beta-Ni(OH)2 flower-like microsphere

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) Dissolve 1.08 g of nickel chloride hexahydrate in 30 ml of ethanol and stir until uniform to obtain a clear solution.

[0017] 2) Transfer the solution prepared in step 1) to a solvothermal device, conduct a solvothermal reaction at 170°C for 6 h, then centrifuge the obtained substance, and then dry it at 80°C to obtain basic nickel chloride powder.

[0018] 3) Disperse 0.1 g basic nickel chloride powder in 20 ml of 3 M potassium hydroxide solution, react for 24 h, wash and dry to obtain β-Ni(OH) 2 Flower-shaped microspheres.

[0019] Prepared β-Ni(OH) 2 The X-ray diffraction pattern is shown in Fig. Its diffraction peaks are similar to those of β-Ni(OH) 2 The standard spectra are consistent, indicating that the obtained product is β-Ni(OH) 2 . Calculated by Scherrer's formula, the average crystal diameter is 4 nm. Prepared β-Ni(OH) 2 The scanning electron microscope photo as figure 2 As shown, it can be seen from the figure that the prepared β-Ni(OH) 2 It ...

Embodiment 2

[0021] 1) Dissolve 1.08 g of nickel chloride hexahydrate in 30 ml of ethanol and stir until uniform to obtain a clear solution.

[0022] 2) Transfer the solution prepared in step 1) to a solvothermal device, perform a solvothermal reaction at 180°C for 9 h, then centrifuge the obtained substance, and then dry it at 80°C to obtain basic nickel chloride powder.

[0023] 3) Disperse 0.1 g basic nickel chloride powder in 20 ml of 6 M sodium hydroxide solution, react for 24 h, wash and dry to obtain β-Ni(OH) 2 Flower-shaped microspheres.

[0024] Prepared β-Ni(OH) 2 The scanning electron microscope photo as image 3 As shown, it can be seen from the figure that the prepared β-Ni(OH) 2 It has a flower-like structure, which is composed of nanosheets.

Embodiment 3

[0026] 1) Dissolve 1.08 g of nickel chloride hexahydrate in 30 ml of ethanol and stir until uniform to obtain a clear solution.

[0027] 2) Transfer the solution prepared in step 1) to a solvothermal device, perform a solvothermal reaction at 130°C for 100 h, then centrifuge the obtained substance, and then dry it at 80°C to obtain basic nickel chloride powder.

[0028] 3) Disperse 0.1 g basic nickel chloride powder in 20 ml of 2 M sodium hydroxide solution, react for 24 h, wash and dry to obtain β-Ni(OH) 2 Flower-shaped microspheres.

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Abstract

The invention discloses a method of preparing a beta-Ni(OH)2 flower-like microsphere. The method comprises the steps of dissolving nickel chloride hexahydrate in an organic solvent, then, transferring liquor to a solvothermal device for carrying out solvothermal reaction, centrifuging and drying to obtain basic nickel chloride powder; and dispersing the basic nickel chloride powder in alkali liquor with concentration of 0.1 M-10M to obtain the beta-Ni(OH)2 flower-like microsphere. The beta-Ni(OH)2 flower-like microsphere prepared by the method consists of beta-Ni(OH)2 nanosheets which consist of beta-Ni(OH)2 nanoparticles. The preparation method disclosed by the invention does not need a template, is simple in process, low in cost and easy to synthesize on large scale.

Description

technical field [0001] The invention relates to a method for preparing β-Ni(OH) 2 Method for flower-like microspheres. Background technique [0002] β-Ni(OH) 2 It is an active electrode material for secondary alkaline batteries. At present, researchers have obtained β-Ni(OH) with various shapes such as tubes, rods, flakes, and flowers. 2 Nano-structure. β-Ni(OH) with flower-like morphology 2 With a larger specific surface area and more active sites, it can improve the specific capacity and cycle performance of electrode materials, so it has attracted people's attention. Although the flower-like morphology of β-Ni(OH) 2 have many advantages, but their controllable synthesis remains the biggest challenge for researchers. [0003] Usually, people generate nickel hydroxide through the direct reaction of nickel salt and alkali, but the rapid hydrolysis rate of nickel salt makes the repeatability of the preparation process worse. The researchers reduced the rate of nickel ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/04B82Y30/00B82Y40/00
Inventor 赵高凌何凯韩高荣
Owner ZHEJIANG UNIV
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