Nano spherical lithium hydroxide and preparation method thereof

A lithium hydroxide and nanosphere technology, applied in the preparation of microspheres, lithium oxide;/hydroxide, microcapsule preparation, etc., to achieve the effects of improving economy, increasing dispersibility, and improving physical appearance and size

Active Publication Date: 2020-05-08
苏州众鑫凯能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, many scientific researchers have done a lot of scientific research on improving the quality of lithium hydroxide, but most of them are based on the purpose of purifying its components, and there are relatively few reports on its morphology and size.

Method used

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  • Nano spherical lithium hydroxide and preparation method thereof
  • Nano spherical lithium hydroxide and preparation method thereof
  • Nano spherical lithium hydroxide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] This example is made through the following steps:

[0029] (1) Preparation of lithium hydroxide solution: Take 125.7 parts by mass of lithium hydroxide (analytically pure, with a purity of 99.9%), put it into 1000 parts by mass of deionized water and stir to dissolve it, and prepare a lithium hydroxide solution with a concentration of 3mol / L ;

[0030] (2) Preparation of lithium hydroxide emulsion: add 40 parts by mass of sulfonated kerosene to the lithium hydroxide solution prepared in step (1), add 0.20 parts by mass of sodium tetradecyl sulfate, and stir evenly to obtain lithium hydroxide emulsion;

[0031] (3) Ball making: the lithium hydroxide emulsion prepared in step (2) is dried by spray drying equipment at 250°C to make lithium hydroxide nanospheres;

[0032] (4) Drying: place the lithium hydroxide nanospheres prepared in step (3) in a drying device at 220°C for sufficient drying to remove organic matter and structural water, and obtain nano-spherical lithium...

Embodiment 2

[0034] This example is made through the following steps:

[0035] (1) Preparation of lithium hydroxide solution: Take 41.9 parts by mass of lithium hydroxide (analytically pure, with a purity of 99.9%), put it into 10,000 parts by mass of deionized water, stir and dissolve it fully, and prepare lithium hydroxide with a concentration of 0.1mol / L solution;

[0036] (2) Preparation of lithium hydroxide emulsion: add 2072 parts by mass of propylene glycol to the lithium hydroxide solution prepared in step (1), add 0.02 parts by mass of sodium dodecylsulfonate, and stir evenly to obtain lithium hydroxide emulsion turbid liquid;

[0037] (3) Ball making: the lithium hydroxide emulsion prepared in step (2) is dried by spray drying equipment at 100°C to make lithium hydroxide nanospheres;

[0038] (4) Drying: The lithium hydroxide nanospheres prepared in step (3) are placed in a drying device at 400°C for sufficient drying to remove organic matter and structural water to obtain nano...

Embodiment 3

[0040] This example is made through the following steps:

[0041] (1) Preparation of lithium hydroxide solution: Take 41.9 parts by mass of lithium hydroxide (analytically pure, with a purity of 99.9%), put it into 1000 parts by mass of deionized water and fully stir and dissolve it to prepare a lithium hydroxide solution with a concentration of 1mol / L ;

[0042] (2) Preparation of lithium hydroxide emulsion: add 127 parts by mass of polyethylene glycol to the lithium hydroxide solution prepared in step (1), add 0.02 parts by mass of sodium dodecylsulfonate, and stir evenly to obtain hydrogen Lithium oxide emulsion;

[0043] (3) Ball making: the lithium hydroxide emulsion prepared in step (2) is sprayed and dried at 400°C by spray drying equipment to prepare lithium hydroxide nanospheres;

[0044] (4) Drying: After the lithium hydroxide nanospheres prepared in step (3) are fully stirred by a three-dimensional mixer, they are placed in a drying device for sufficient drying at...

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Abstract

The invention discloses nano spherical lithium hydroxide and a preparation method thereof. The nano spherical lithium hydroxide and the preparation method thereof are characterized in that the particle size of primary particles of the lithium hydroxide nanospheres is 10-600nm, the particle size D50 of laser particle size test is 50-2000nm, the purity of the lithium hydroxide nanospheres is greaterthan 99.7%, and the balance is 0.01-0.2% of non-polar organic matters and a proper amount of impurities. According to the nanospheres, a lithium hydroxide solution is matched with a non-polar organicsolvent and an ionic surfactant with a hydrophobic group according to a certain proportion to form stable water-in-oil, namely the structure is a structure that an organic matter wraps a water phase(W/O), the solution system is enabled to form emulsion liquid beads with nanometer and micrometer sizes, then, the lithium hydroxide of the liquid beads can be dried in the spraying process to separate out spherical nanoparticles, and in the drying process, a small amount of non-polar organic matters are remained, so that the dispersity of the lithium hydroxide nanospheres is improved, the hardening of the lithium hydroxide particles is favorably prevented, and the better physical morphology and size of the lithium hydroxide nanospheres are maintained.

Description

technical field [0001] The invention belongs to the technical field of physically preparing electrode raw materials, and in particular relates to a nano-spherical lithium hydroxide and a preparation method thereof. Background technique [0002] In recent years, the rapid development of the new energy industry has led to a sharp increase in the output of power lithium-ion batteries. Lithium hydroxide is selected as one of the important lithium sources in the cathode materials of lithium-ion batteries, and its quality directly affects the performance of lithium-ion cathode materials. For this reason, many scientific researchers have done a lot of scientific research on improving the quality of lithium hydroxide, but most of them are based on the purpose of purifying its components, and there are relatively few reports on its morphology and size. [0003] With the continuous improvement of the performance requirements of lithium-ion ternary cathode materials, ternary materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D15/02B01J13/04
CPCB01J13/043C01D15/02C01P2004/32C01P2004/60C01P2004/61
Inventor 吴嘉华
Owner 苏州众鑫凯能源科技有限公司
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