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

Lithium ion battery positive electrode material and preparation method thereof

A lithium-ion battery and cathode material technology, applied in the field of battery cathode material production, can solve problems such as high sintering temperature and energy waste

Inactive Publication Date: 2021-08-31
宜宾锂宝新材料有限公司
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the industrial production method of lithium-ion cathode materials is mainly to synthesize the precursor by high-temperature solid-state method, then mix the precursor and lithium salt in a certain proportion, and then sinter it in a bowl. Usually, the sintering temperature needs to be very high, which will cause energy waste.

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 battery positive electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Prepare lithium-ion battery cathode material according to the following method:

[0024] (1) Take the production raw material Ni (NO 3 ) 2 , Co(NO 3 ) 2 ·6H 2 O, Mn(NO 3 ) 2 and Li 2 CO 3 .

[0025] (2) After the above raw materials are mixed with distilled water and dissolved at 80°C, excess citric acid is added, the ratio of the molar weight of the added citric acid to the molar weight of metal ions in the raw material is 1.5:1, and the solution is stirred to Transparent and clear, get sol;

[0026] (3) drying the sol at a temperature of 120° C. to obtain a xerogel, and the measured water content of the xerogel is 0.8%;

[0027] (4) Put the obtained xerogel into a sagger, put it into a box-type furnace for sintering, first heat it at 500°C for 6h, then heat it to 830°C for 10h, and then pulverize it to obtain the ternary cathode material LiNi 0.5 co 0.2 mn 0.3 o 2 .

[0028] (5) Detect the electrical properties of the product, the results are shown in T...

Embodiment 2

[0030] Prepare lithium-ion battery cathode material according to the following method:

[0031] (1) Take by weighing production raw material Ni (NO 3 ) 2 , Co(NO 3 ) 2 ·6H 2 O, Mn(NO 3 ) 2 and Li 2 CO 3 .

[0032] (2) After the above raw materials are mixed with distilled water and dissolved at 80°C, excess citric acid is added, the ratio of the molar weight of the added citric acid to the molar weight of metal ions in the raw material is 1.5:1, and the solution is stirred to Transparent and clear, get sol;

[0033] (3) drying the sol at a temperature of 120° C. to obtain a xerogel, and the measured water content of the xerogel is 0.8%;

[0034] (4) Put the obtained xerogel into a sagger, put it into a box-type furnace for sintering, first keep it at 500°C for 6h, then heat it to 850°C for 10h, and grind it after calcination to get the ternary cathode material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 .

[0035] (5) Detect the electrical properties of the product, the results ...

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 discloses a preparation method of a lithium ion battery positive electrode material. The preparation method comprises: S1, weighing production raw materials such as soluble metal salt and Li2CO3, mixing and dissolving the raw materials with distilled water, adding excessive citric acid, and stirring until the solution is transparent and clarified to obtain a sol; S2, drying the sol at the temperature of 100 to 180 DEG C to obtain xerogel; and S3, putting the xerogel into a bowl, calcining, and crushing after calcining to obtain the product. The method has the advantages that the sintering temperature of the positive electrode material can be obviously reduced under the condition that the battery performance is not reduced, so that the production energy consumption is obviously reduced.

Description

technical field [0001] The invention relates to a battery production technology, in particular to a battery cathode material production technology. Background technique [0002] The production of cathode materials for lithium-ion batteries is an important link that affects the performance of lithium-ion batteries, because the specific capacity of batteries mainly depends on the properties of cathode materials, so the development of high-quality and low-cost cathode materials is a core link in the development of lithium-ion battery production technology . Due to the advantages of high capacity and long cycle life, ternary cathode materials are favored by people. [0003] At present, the industrial production method of lithium-ion cathode materials is mainly to synthesize the precursor by high-temperature solid-state method, then mix the precursor and lithium salt in a certain proportion, and then sinter it in a bowl. Usually, the sintering temperature needs to be very high, ...

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): H01M4/485H01M4/04H01M10/0525
CPCH01M4/485H01M4/0471H01M10/0525Y02E60/10
Inventor 刘美景袁海涛黄殿华刘玉孙天娥王政强张郑
Owner 宜宾锂宝新材料有限公司