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

Grafting type positive electrode material precursor as well as preparation method and application thereof

A technology of cathode materials and precursors, which is applied in the field of grafted cathode material precursors and its preparation, can solve the problems of inconsistent electrochemical performance of materials, uneven dispersion of slurry, and poor uniformity of pole pieces, so as to solve the problem of slurry dispersion Unevenness, avoiding the effect of uneven dispersion

Pending Publication Date: 2022-08-09
高点(深圳)科技有限公司 +1
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the objectives of the present invention is to provide a grafted positive electrode material precursor to solve the problems of uneven dispersion of slurry, poor uniformity of the electrode sheet and material electrical conductivity when various positive electrode materials are mixed and used in the current application process of lithium ion batteries. The problem of inconsistent chemical properties

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
  • Grafting type positive electrode material precursor as well as preparation method and application thereof
  • Grafting type positive electrode material precursor as well as preparation method and application thereof
  • Grafting type positive electrode material precursor as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0046] A second aspect of the present invention aims to provide a method for preparing the grafted positive electrode material precursor, comprising the following steps:

[0047] S1, the aqueous solution containing nickel salt, cobalt salt, manganese salt and Z salt is mixed and reacted with the hydroxide aqueous solution, the pH of the solution in the control reaction process is 10~13, ageing, suction filtration obtains hydroxide type salt A ( OH) 2 ;

[0048] S2, mix and react the aqueous solution containing nickel salt, cobalt salt, manganese salt and Z salt with the carbonate aqueous solution, control the pH of the solution in the reaction process to be 6~9, age, and suction filtration to obtain carbonate type salt BCO 3 ;

[0049] S3, the hydroxide type salt A (OH) 2 with carbonate salt BCO 3 Mixing at 25~70℃ to make slurry; adding the solution for liquid phase reaction to form grafting agent R into the slurry, stirring and reacting for 30~90min, washing and drying to...

Embodiment 1

[0069] A method for preparing a grafted positive electrode material, the structural formula of which is LiNi 0.5 Co 0.2 Mn 0.3 O 2 -LiCoO 2 . The structural formula of the precursor is (Ni 0.5 Co 0.2 Mn 0.3 )(OH) 2 -(Co 0.5 Mn 0.5 )CO 3 -CoCO 3 .

[0070] The preparation method of the grafted positive electrode material precursor includes the following steps:

[0071] S1, (Ni 0.5 Co 0.2 Mn 0.3 )(OH) 2 (i.e. NCM523-OH) precursor preparation: NiSO was formulated in a molar ratio of 5:2:3 4 , CoSO 4 , MnSO 4 aqueous solution (Ni 2+ , Co 2+ , Mn 2+ The total concentration is 2mol*L -1 ) 500mL, marked as solution 1; prepare 4mol*L -1 500mL of NaOH solution, marked as solution 2; solution 1 and solution 2 were added to a five-necked flask reactor with 100mL of deionized water at a speed of about 1mL / min through a peristaltic pump, and the reaction was stirred. 2 protection, and keep the reaction temperature at 30-80 °C and the stirring speed at 500 rpm / min;...

Embodiment 2

[0077] Different from Example 1, the preparation step S3 of the precursor of the grafted positive electrode material.

[0078] S3. Preparation of grafted cathode material precursor: Weigh 40g NCM523-OH and 20g CoCO 3 , dispersed in 60 g of deionized water and stirred at 60 ° C to make a slurry; preparation solution (for generating grafting agent R through liquid phase reaction): including the first solution (CoSO 4 : MnSO 4 The molar ratio is 1:1) the concentration is 2mol / L, the second solution is NaHCO 3 The concentration is 1 mol / L; the first solution and the second solution are pumped into the slurry at the rate of 0.5mL / min and 3.5mL / min respectively, and after the reaction for 30min, the remaining first solution and the second solution are pumped into the slurry Continue to stir and react in the slurry for 30min, wash, filter and dry the slurry to obtain the grafted positive electrode material precursor NCM523-OH grafted CoCO 3 , denoted as NCM523-OH-(Co 0.5 Mn 0.5 ...

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 grafting type positive electrode material precursor and a preparation method and application thereof, the structural formula of the grafting type positive electrode material precursor is A (OH) 2-R-BCO3, A and B are Ni1-a-bCoaMnbZc, and a is more than or equal to 0 and less than or equal to 1; 0 < = b < = 1; 0 < a + b < = 1; c is larger than or equal to 0 and smaller than or equal to 1, the molar ratio of nickel to cobalt to manganese in A is different from the molar ratio of nickel to cobalt to manganese in B, and Z is at least one of Al, Mg, Ti, B, Zr, Bi, Mo, P, F and rare earth elements; r is a grafting agent comprising at least one of Ni, Co, Mn, Al, Mg, Si, Ti, B, Zr, Bi, Mo, P and rare earth elements. Compared with the prior art, the precursor is grafted at the precursor end, so that the purpose of uniformly mixing different types of materials is achieved, and the problems of non-uniform slurry dispersion, poor pole piece uniformity and inconsistent material electrochemical performance of the current mixed positive electrode material are solved.

Description

technical field [0001] The invention relates to the field of lithium batteries, in particular to a graft-type positive electrode material precursor and a preparation method and application thereof. Background technique [0002] Lithium-ion batteries are more and more widely used in daily life. At present, lithium-ion battery cathode materials mainly include lithium cobalt oxide, lithium manganate, lithium iron phosphate and lithium nickel cobalt manganate. Different types of cathode materials have different electrochemical properties and match different application scenarios. [0003] With the continuous expansion of the application scenarios of lithium-ion batteries, it is difficult for lithium-ion batteries made of a single cathode material to meet the requirements of various segments in terms of performance and cost at the same time. A variety of cathode materials (usually two types) can usually be mixed to achieve a balance between cost control and performance requirem...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00C01G51/00C01G51/04C01G51/06H01M4/505H01M4/525H01M10/0525
CPCC01G53/006C01G51/006C01G51/06C01G53/50C01G51/42C01G51/04C01G53/00H01M4/525H01M4/505H01M10/0525C01P2002/72C01P2004/03C01P2006/40C01P2004/80Y02E60/10
Inventor 赵孝连方刚
Owner 高点(深圳)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