Unlock instant, AI-driven research and patent intelligence for your innovation.

Production method of 811 type ternary precursor material

A production method and precursor technology, applied in the field of lithium battery ternary materials, can solve problems such as cracking, looseness, and unstable performance of positive electrode materials, and achieve the effect of solving cracking problems and maintaining performance stability

Pending Publication Date: 2022-02-15
JINGMEN GEM NEW MATERIAL
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The large particle 811 type ternary precursor material is loose inside and the outer layer has a tight structure. The ternary precursor is prone to cracking during the drying process, resulting in unstable and fluctuating performance of the positive electrode material.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Production method of 811 type ternary precursor material
  • Production method of 811 type ternary precursor material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for producing an 811-type ternary precursor material, comprising:

[0020] (1) Mix nickel sulfate, cobalt sulfate and manganese sulfate according to the molar ratio of nickel, cobalt and manganese of 80:10:10, prepare a ternary metal salt solution with a concentration of 80g / L, and prepare a ternary metal salt solution with a concentration of 32 % liquid caustic soda solution and concentration of 15% ammonia solution are added into the first reaction kettle containing the first bottom liquid at the same time, and the first reaction kettle is 6m 3 Reactor, the first bottom liquid is a mixture of pure water, ammonia water and liquid caustic soda, wherein, the addition amount is pure water 3.8m 3 , 30L of liquid caustic soda, 20L of ammonia water, and the reaction was carried out at a stirring rate of 110r / min. During the reaction, the pH of the reaction system was controlled to be 11.0-12.0, the ammonia concentration was 9-12g / L, the reaction residence time was 5...

Embodiment 2

[0023] A method for producing an 811-type ternary precursor material, comprising:

[0024] (1) Nickel sulfate, cobalt sulfate and manganese sulfate are mixed by nickel, cobalt, manganese molar ratio as 81:10:09, preparation concentration is 100g / L ternary metal salt solution, and ternary metal salt solution, concentration is 32 % liquid caustic soda solution, concentration is that 16% ammonia solution is added in the first reactor containing the first bottom liquid simultaneously, and the first reactor is 6m 3 Reactor, wherein the first bottom liquid is a mixture of pure water, ammonia water and liquid caustic soda, and the amount of pure water added is 4.0m 3 , 40L of liquid caustic soda, 25L of ammonia water, and the reaction was carried out at a stirring rate of 150r / min. During the reaction, the pH of the reaction system was controlled to be 11.0-12.0, the ammonia concentration was 10-12g / L, the reaction residence time was 60h, and the reaction particle size D50 reached 4...

Embodiment 3

[0027] A method for producing an 811-type ternary precursor material, comprising:

[0028] (1) Nickel sulfate, cobalt sulfate and manganese sulfate are mixed by nickel, cobalt, manganese molar ratio is 83:07:10, preparation concentration is 120g / L ternary metal salt solution, and ternary metal salt solution, concentration is 32 % liquid caustic soda solution and concentration of 18% ammonia solution are added into the first reaction kettle containing the first bottom liquid at the same time, and the first reaction kettle is 6m 3 Reactor, wherein the first bottom liquid is a mixture of pure water, ammonia water and liquid caustic soda, and the addition amount is pure water 4.2m 3 , 58L of liquid caustic soda, 32L of ammonia water, the reaction was carried out at a stirring rate of 200r / min. During the reaction, the pH of the reaction system was controlled to be 12.0-13.0, the ammonia concentration was 10-13g / L, the reaction residence time was 70h, and the reaction particle size...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a production method of an 811 type ternary precursor material, and the method comprises the following steps: adding a ternary metal salt solution, a liquid alkali solution and an ammonia water solution into a first reaction kettle containing a first base solution, controlling the pH value, ammonia concentration and reaction retention time of a reaction system in the reaction process, and stopping the reaction when the reaction particle size D50 reaches 4.0-5.0 microns; (2) adding one part of the material obtained in the step (1) as a second base solution into a second reaction kettle, simultaneously adding the ternary metal salt solution, the liquid alkali solution, the ammonia water solution and the rest part of the material obtained in the step (1) into the second reaction kettle for reaction, controlling the pH and the ammonia concentration of the reaction system in the reaction process, and performing thickening by adopting a thickener to obtain the 811 type ternary precursor material slurry; and obtaining the 811 type ternary precursor after ageing, washing, drying and packaging, so the cracking problem is solved, and the performance stability in the downstream positive electrode material preparation process is maintained.

Description

technical field [0001] The invention relates to the technical field of ternary materials for lithium batteries, in particular to a method for producing 811-type ternary precursor materials. Background technique [0002] The large particle 811 type ternary precursor material is loose inside and the outer layer has a tight structure. The ternary precursor is prone to cracking during the drying process, resulting in unstable and fluctuating performance of the positive electrode material. Contents of the invention [0003] In view of the deficiencies in the above-mentioned prior art, the present invention provides a method for producing 811-type ternary precursor material. [0004] The present invention is achieved through the following technical solutions. [0005] A 811-type ternary precursor material production method, characterized in that the method comprises: [0006] (1) Add ternary metal salt solution, liquid caustic soda solution and ammonia solution into the first ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C01G53/00
CPCC01G53/006C01P2004/51C01P2006/11C01P2006/12C01P2004/01
Inventor 许开华陈龙李涛黎俊蒋世凤朱大明陈彩
Owner JINGMEN GEM NEW MATERIAL