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Preparation method of nano petaline Ni(OH)2

A petal-shaped and nano-technology, applied in the direction of nano-technology, nickel oxide/nickel hydroxide, etc., can solve the problems of no nano-petal-shaped nickel hydroxide reported in the literature, complicated preparation process, and large environmental load, etc., to achieve good crystal shape , Uniform grain size and low cost

Inactive Publication Date: 2012-11-14
INNER MONGOLIA UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The traditional hydrothermal synthesis method is to add auxiliary substances such as ethylene glycol, macrocyclic polyamines and ionic liquids to the hydrothermal synthesis system. In the preparation process, most of them use high-molecular organic compounds as templates, supplemented by solvents or surfactants, and prepare Complex process, heavy environmental load, and high cost
[0011] However, there is no bibliographical report on the preparation of nanometer petal-shaped nickel hydroxide by hydrothermal synthesis.

Method used

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  • Preparation method of nano petaline Ni(OH)2
  • Preparation method of nano petaline Ni(OH)2
  • Preparation method of nano petaline Ni(OH)2

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0026] Measure 0.02 mol / L NiSO 4 Put 150 mL of aqueous solution in a 500 mL beaker at room temperature, under stirring with a magnetic stirrer, slowly add 3 mL of 1.00 mol / L urea aqueous solution to the above NiSO 4 In the aqueous solution, continue to stir for 10 minutes, transfer the reaction mixture (the molar ratio of nickel to urea is 1:1) into a 200mL stainless steel reaction kettle lined with polytetrafluoroethylene, and put it in an electric thermostat at 170°C for 18 hours. Cool to room temperature. Filter, wash with deionized water until neutral, dry at 80°C to constant weight, and the petals become thinner to obtain nano-petal Ni(OH) 2 .

Embodiment 2

[0028] Measure 0.02 mol / L NiSO 4 Put 150 mL of aqueous solution in a 500 mL beaker at room temperature, under stirring with a magnetic stirrer, slowly add 6 mL of 1.00 mol / L aqueous urea solution to the above NiSO 4 In the aqueous solution, continue to stir for 10 minutes, transfer the reaction mixture into a 200mL stainless steel reaction kettle lined with polytetrafluoroethylene, put it in a 170°C electric thermostat for 2 hours, and then cool it down to room temperature naturally. Filter, wash with deionized water until neutral, dry at 80°C to constant weight, and the petals become thinner to obtain nano-petal Ni(OH) 2 .

[0029] Analysis example

[0030] 1. SEM analysis of prepared samples:

[0031] figure 1 Shown are the scanning electron micrographs of the prepared samples under different nickel: urea molar ratios. figure 1 where b, d, and e correspond to nickel:urea molar ratios of 1:2, 1:5, and 1:6, respectively.

[0032] from figure 1 It can be seen that the sa...

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Abstract

The invention discloses a preparation method of nano petaline Ni(OH)2. The method comprises the steps of taking nickel sulfate and urea as materials, preparing mixed solution of which the molar ratio of nickel to urea is 1:1 to 1:6 and then transferring the mixed solution to a 200mL of self-pressure lining polytetrafluoroethylene stainless steel reaction kettle, wherein the loading degree of a hydrothermal reaction kettle can be up to 80%; covering an inner cover and an outer cover to feed to an electric heating constant-temperature tank, heating the solution to 170 DEG C, reacting for 2-20 hours at constant temperature, then naturally cooling the solution to room temperature, filtering and washing the solution into a neutral state by deionized water; drying the solution into constant weight at 80 DEG C, and thinning the petals to prepare the nano petaline Ni(OH)2. According to the preparation method, the urea is taken as a precipitator, and a nano petaline Ni(OH)2 microsphere is directly prepared by hydrothermal syntheses; the method is simple in process, low in cost and easy to control without high-temperature sintering or a template agent, the obtained product crystal particle has the advantages that the size is uniform; the particle purity is high; the dispersity is good, and the crystalline form is good and controllable.

Description

[0001] technical field [0002] The invention relates to a kind of nano petal Ni(OH) 2 The preparation method belongs to the technical field of power storage batteries, and in particular relates to a preparation method of a positive electrode material of a nickel-hydrogen power battery. Background technique [0003] The MH-Ni battery, known as the green battery, has the advantages of low production cost, long cycle life, good low temperature performance, fast charge and discharge, high specific power, strong overcharge and discharge resistance, no memory effect and environmental friendliness. Advantages, and is considered to be the most competitive power source of electric vehicles or hybrid electric vehicles, and thus become a hot research and development in various countries. Nickel hydroxide, as the main positive electrode active material of nickel-metal hydride secondary batteries, is usually the key material to increase the battery capacity, so the preparation of highe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/04B82Y40/00
Inventor 赫文秀张永强安胜利蒋文全孙海峰梁倩卿郎中敏
Owner INNER MONGOLIA UNIV OF SCI & TECH
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