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

Lithium ion quaternary positive electrode material, preparation method thereof and lithium ion battery

A technology for lithium ion batteries and positive electrode materials, which is applied in the direction of positive electrodes, battery electrodes, secondary batteries, etc., can solve the problems of poor safety and cycle performance, decreased material structure stability, etc., and improve cycle performance and cycle life. , to avoid loosening and pulverization, the effect of excellent cycle performance

Pending Publication Date: 2021-10-08
BATTERO TECH CORP LTD
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the ternary cathode materials include lithium nickel cobalt aluminate and lithium nickel cobalt manganese oxide, and with the increase of nickel content, the capacity of the material increases and the cost decreases, but the structural stability of the material decreases, resulting in poor safety and cycle performance

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
  • Lithium ion quaternary positive electrode material, preparation method thereof and lithium ion battery
  • Lithium ion quaternary positive electrode material, preparation method thereof and lithium ion battery
  • Lithium ion quaternary positive electrode material, preparation method thereof and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0038] According to a first aspect of the present invention, the present invention provides a kind of preparation method of lithium-ion battery quaternary cathode material, comprises the following steps:

[0039] Co-precipitate the mixed solution of soluble nickel salt, soluble cobalt salt, and soluble manganese salt, aluminum hydroxide colloidal solution and alkali solution to prepare a quaternary transition metal hydroxide precursor. The quaternary transition metal hydroxide precursor The body and the lithium source are mixed and sintered to obtain a quaternary positive electrode material for a lithium-ion battery.

[0040] In the present invention, the quaternary transition metal hydroxide precursor is prepared by co-precipitation method by using aluminum hydroxide colloidal solution instead of soluble aluminum salt, soluble nickel salt, soluble cobalt salt and soluble manganese salt. Controlled, the quaternary transition metal hydroxide precursor with uniform distribution ...

Embodiment 1

[0076] This embodiment provides a quaternary cathode material for a lithium-ion battery, which is prepared according to the following steps:

[0077] (1) configure the first solution: take nickel sulfate hexahydrate, manganese sulfate monohydrate, and cobalt sulfate heptahydrate according to the molar ratio nickel: cobalt: manganese=0.88:0.06:0.03, utilize deionized water to dissolve, and configure to obtain mass concentration of 2mol / L transition metal salt solution, called the first solution;

[0078] (2) Configure the second solution: weigh aluminum nitrate nonahydrate and dissolve it in deionized water, then add concentrated ammonia water with a mass concentration of 25% into the aluminum salt solution drop by drop, and keep stirring, when pH=8-9 stop dripping concentrated ammonia water, and finally set the volume to the aluminum hydroxide concentration of 0.11mol / L, which is called the second solution;

[0079] (3) Preparation of quaternary transition metal hydroxide pre...

Embodiment 2

[0082] This embodiment provides a lithium-ion battery quaternary positive electrode material, the difference between its preparation method and embodiment 1 is that in step (4), when the hydroxide precursor and lithium hydroxide are mixed and sintered, 500 ℃ sintering for 3 hours, 850 ℃ sintering for 15 hours, and then the product was crushed and sieved to a D50 of 12 microns while cooling down.

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 provides a lithium ion quaternary positive electrode material, a preparation method thereof and a lithium ion battery, and relates to the technical field of positive electrode materials. The lithium ion quaternary positive electrode material is prepared according to the following steps: carrying out coprecipitation reaction on a mixed solution of soluble nickel salt, soluble cobalt salt and soluble manganese salt, an aluminum hydroxide colloidal solution and an alkali solution to prepare a quaternary transition metal hydroxide precursor; and mixing and sintering the quaternary transition metal hydroxide precursor and a lithium source to obtain the quaternary positive electrode material of the lithium ion battery. The mixed solution of soluble nickel salt, soluble cobalt salt and soluble manganese salt and an aluminum hydroxide colloidal solution are co-precipitated to prepare a quaternary transition metal hydroxide precursor with controllable particle size and morphology; and the quaternary transition metal hydroxide precursor and the lithium source are sintered to prepare the lithium ion battery quaternary positive electrode material with uniformly distributed nickel, cobalt, manganese and aluminum elements, high tap density, good safety performance and excellent cycle performance.

Description

technical field [0001] The invention relates to the technical field of cathode materials, in particular to a lithium-ion quaternary cathode material, a preparation method thereof, and a lithium-ion battery. Background technique [0002] At present, the positive electrode materials of lithium-ion batteries mainly include lithium cobaltate, lithium nickelate, lithium manganate, ternary materials and lithium iron phosphate. The above types of materials have their own advantages and disadvantages. Through the balance of cost and performance, current power batteries mainly use ternary materials and lithium iron phosphate materials. Among them, the ternary positive electrode materials include lithium nickel cobalt aluminate and lithium nickel cobalt manganese oxide, and with the increase of nickel content, the capacitance of the material increases and the cost decreases, but the structural stability of the material decreases, resulting in poor safety and cycle performance. [000...

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): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 王宝君
Owner BATTERO TECH CORP LTD