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Preparation method of spherical nickel hydroxide used as battery cathode material

A technology of spherical nickel hydroxide and battery positive electrode, which is applied in the direction of nickel oxide/nickel hydroxide, battery electrodes, circuits, etc., can solve the problems of very strict control of reaction conditions, and achieve uniform particle size distribution of products, good thermal stability, low cost effect

Inactive Publication Date: 2013-06-12
HEFEI UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned chemical precipitation crystal growth method uses aqueous solution as the reaction medium, and the main problem is that in order to obtain spherical nickel hydroxide with satisfactory average particle size and particle size distribution, the reaction conditions are very strictly controlled.

Method used

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  • Preparation method of spherical nickel hydroxide used as battery cathode material
  • Preparation method of spherical nickel hydroxide used as battery cathode material
  • Preparation method of spherical nickel hydroxide used as battery cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 4.71g of nickel chloride and add it into a round-bottomed flask filled with 50mL of 1H-1,2,4-triazoleacetic acid ionic liquid, add 0.4g of sodium dodecylsulfonate at the same time, stir to make it dissolve in the ionic liquid Under the condition of stirring, add dropwise the solution formed by 0.8g sodium hydroxide and 4mL water, heat to 100°C for 12h; after cooling, separate, wash and dry the precipitate to obtain spherical nickel hydroxide.

[0028] According to the XRD test of the spherical nickel hydroxide sample prepared according to Example 1, no other miscellaneous phase diffraction peaks appear, which shows that the prepared sample is good in crystallinity and β crystal form Ni(OH) with complete crystal structure. 2 .

Embodiment 2

[0030] Weigh 4.71g of nickel chloride and add it into a round bottom flask filled with 50mL of 11H-1,2,4-triazoleacetic acid ionic liquid, add 0.4g of sodium dodecylsulfonate at the same time, stir to make it dissolve in the ionic liquid Under the condition of stirring, add dropwise the solution formed by 1.12g potassium hydroxide and 4mL water, heat to 50°C for 20h; after cooling, separate, wash and dry the precipitate to obtain spherical nickel hydroxide.

[0031] The spherical nickel hydroxide sample prepared according to Example 2 shows that it is spherical and has uniform particles through SEM testing; through electrochemical performance testing, its initial discharge capacity reaches 262.4mAh / g, and there is a relatively flat discharge platform, which shows that the prepared sample Has good electrochemical performance.

Embodiment 3

[0033] Weigh 2.5g of nickel acetate and add it to a round-bottomed flask filled with 50mL of 1H-1,2,4-triazoleacetic acid ionic liquid, and add 0.25g of sodium dodecylbenzenesulfonate at the same time, stir to make it dissolve in the ionic liquid Disperse evenly in the medium; under the condition of stirring, add dropwise the solution formed by 3.4g sodium hydroxide and 3.4mL water, heat to 220°C for 1.5h; after cooling, the precipitates are separated, washed and dried in sequence to obtain spherical nickel hydroxide .

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Abstract

The invention discloses a preparation method of spherical nickel hydroxide used as a battery cathode material, and the preparation method comprises the following steps: adding a nickel source into a cyclamine ionic liquid to obtain a nickel source solution, adding an additive into the nickel source solution and mixing evenly; and then adding a crystallizing agent aqueous solution, reacting while stirring at the temperature of 50-220 DEG C for 1.5-36 hours, cooling to room temperature, separating, washing and drying to obtain spherical nickel hydroxide. In the invention, an ionothermal preparation technology of spherical nickel hydroxide used as a cathode material at low temperature and normal pressure is provided, thereby avoiding the requirements of a hydrothermal method on high pressure; and the ionic liquid not only is used as a reaction medium but also is a structure adjusting and controlling agent for crystal growth, thus spherical nickel hydroxide used as the cathode material with uniform particle size and morphology structure is easily obtained.

Description

1. Technical field [0001] The invention relates to a method for preparing a positive electrode material of a battery, in particular to a method for preparing spherical nickel hydroxide for the positive electrode material of a battery. 2. Background technology [0002] Ni(OH) 2 It is the main positive electrode active material of various alkaline storage batteries (such as Ni / Cd, Ni / Zn, Ni / MH), and plays a key role in the capacity and life of the battery. With the wide application of the new generation of high specific energy green nickel metal hydride batteries in mobile communications, electric tools and electric vehicles, the research on nickel hydroxide materials and their preparation technology has also received more and more attention. [0003] At present, the chemical precipitation crystal growth method is generally used to prepare spherical nickel hydroxide in industrial production, that is: nickel salt (such as NiSO 4 , or NiCl 2 , or Ni(NO 3 ) 2 etc.) solution,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/52C01G53/04
CPCY02E60/12Y02E60/10
Inventor 李学良刘沛罗梅肖正辉孙卫华李世辉
Owner HEFEI UNIV OF TECH
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