Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Positive electrode material and preparation method thereof, positive plate and lithium ion battery

A technology of positive electrode material and positive electrode sheet, which is applied in the field of positive electrode sheet and lithium ion battery, positive electrode material and its preparation, can solve the problems of volume change, battery safety performance degradation, accelerated Co metal dissolution and O precipitation, etc., to expand the diffusion channel , stable structure and high energy density

Pending Publication Date: 2022-05-27
惠州锂威新能源科技有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since lithium cobaltate is a layered structure material, the crystal structure of lithium cobaltate changes with the deep extraction of lithium ions, and a phase transition process leads to a volume change; under high voltage, it will accelerate the dissolution of Co metal and O precipitation, resulting in battery safety performance Decline

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
  • Positive electrode material and preparation method thereof, positive plate and lithium ion battery
  • Positive electrode material and preparation method thereof, positive plate and lithium ion battery
  • Positive electrode material and preparation method thereof, positive plate and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1. Weigh the raw material Co according to the weight ratio of 688:317:2:1 3 O 4 , Li 2 CO 3 , Mg(OH) 2 and Y 2 O 3 ;

[0035] 2. Put the Co in step 1 3 O 4 , Li 2 CO 3 , Mg(OH) 2 and Y 2 O 3 Placed in a ball mill for ball milling and mixing for 10 hours at a speed of 500 r / min to obtain a Mg-Y co-doped lithium cobalt oxide precursor, that is, a pretreatment reactant;

[0036] 3. Put the Mg-Y co-doped lithium cobalt oxide precursor (pretreatment reactant) into a muffle furnace for 400 ℃ low temperature pre-sintering treatment for 10 hours, and then heat up to 850 ℃ for 8 hours for high temperature calcination treatment to obtain Mg -Ln co-doped lithium cobalt oxide crude sample;

[0037]4. The Mg-Y co-doped lithium cobalt oxide coarse sample is sieved and processed to finally obtain LiMg 0.008 Y x Co 1-x O 2 Cathode materials such as figure 1 and figure 2 As shown, the surface of the doped lithium cobalt oxide is rougher, and small particles appear o...

Embodiment 2

[0039] The difference from Example 1 is that the metal compound containing A-type elements is ZrO 2 .

[0040] The rest are the same as those in Embodiment 1, and are not repeated here.

Embodiment 3

[0042] The difference from Example 1 is that the metal compound containing A-type elements is Ln 2 O 3 .

[0043] The rest are the same as those in Embodiment 1, and are not repeated here.

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 belongs to the technical field of lithium ion batteries, and particularly relates to a positive electrode material and a preparation method thereof, a positive plate and a lithium ion battery, the positive electrode material comprises bimetal doped lithium cobalt oxide, the chemical formula of the bimetal doped lithium cobalt oxide is LiMg0. 008AxCo1-xO2, x is more than or equal to 0.0005 and less than or equal to 0.0012, and A is any one of Eu, Mn, Ni, La, Y, W and Zr. The positive electrode material disclosed by the invention has the bimetal doped lithium cobalt oxide, the layered structure of the lithium cobalt oxide material is optimized by a bimetal doping system, the structure is more stable, a lithium ion diffusion channel is expanded, lithium ions are favorably separated and embedded, the energy density is higher, the cycle performance is better, and the positive electrode material can stably operate under the condition of high voltage of 4.45 V and above.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a positive electrode material and a preparation method thereof, a positive electrode sheet and a lithium ion battery. Background technique [0002] Lithium-ion secondary batteries are widely used in consumer electronic products, portable electronic equipment, drone aerial photography and new energy vehicles because of their advantages of high specific energy, miniaturization, ultra-thinness, light weight and high safety. and other fields. A lithium ion secondary battery is mainly composed of a positive electrode, a negative electrode, a separator and an electrolyte. In recent years, with the rapid development of mobile terminals such as smartphones, tablets, watches, drones, and home robots, people have higher requirements for the safety performance and cycle life of lithium-ion secondary batteries. The energy exertion of negative electrode materials s...

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): C01G51/00H01M4/525H01M10/0525
CPCC01G51/42H01M4/525H01M10/0525H01M2004/028C01P2004/03C01P2006/40Y02P70/50Y02E60/10
Inventor 蔡泽林杨山陈杰项海标其他发明人请求不公开姓名
Owner 惠州锂威新能源科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com