Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

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

A technology for lithium-ion batteries and positive electrode materials, which is applied in the field of lithium-ion battery positive electrode material precursors and its preparation, can solve problems such as low capacity of positive electrode materials, improve processability and structural stability, improve power performance, and simple parameters Effect

Pending Publication Date: 2021-10-01
HEFEI GUOXUAN HIGH TECH POWER ENERGY
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the CN110931772 A patent, the risk of low capacity of the positive electrode material caused by element segregation is prone to occur.

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 precursor, preparation method thereof and lithium ion battery positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation of cathode material precursors for lithium-ion batteries:

[0027] S1, according to coprecipitation reaction product is (Ni 0.85 co 0.1 mn 0.05 ) 0.99 Al 0.01 (OH) 2 The ratio of nickel sulfate, cobalt sulfate, manganese sulfate, aluminum sulfate is dissolved in water, obtains the first mixed solution that metal ion concentration is 2mol / L;

[0028] S2, according to the co-precipitation reaction product is Ni 0.85 co 0.1 mn 0.05 (OH) 2 The ratio of nickel sulfate, cobalt sulfate, manganese sulfate is dissolved in water, obtains the second mixed solution that metal ion concentration is 2mol / L;

[0029] S3. Under nitrogen protection, continuously add the first mixed solution, the sodium hydroxide solution with a concentration of 4.5mol / L and the ammonia solution with a concentration of 9mol / L in the reactor, and control the feeding flow rate of the first mixed solution to be 30mL / L. min, NH in the reaction system 3 The concentration is 9g / L, the pH ...

Embodiment 2

[0035] Preparation of cathode material precursors for lithium-ion batteries:

[0036] S1, according to coprecipitation reaction product is (Ni 0.6 co 0.2 mn 0.2 ) 0.99 Al 0.01 (OH) 2 The ratio of nickel sulfate, cobalt sulfate, manganese sulfate, aluminum sulfate is dissolved in water, obtains the first mixed solution that metal ion concentration is 2.2mol / L;

[0037] S2, according to the co-precipitation reaction product is Ni 0.6 co 0.2 mn 0.2 (OH) 2 The ratio of nickel sulfate, cobalt sulfate, manganese sulfate is dissolved in water, obtains the second mixed solution that metal ion concentration is 2.2mol / L;

[0038] S3. Under the protection of nitrogen, continuously add the first mixed solution, the sodium hydroxide solution with a concentration of 6mol / L and the ammonia solution with a concentration of 10mol / L to the reactor, and control the feeding flow rate of the first mixed solution to 30mL / min, NH in the reaction system 3 The concentration of the concentr...

Embodiment 3

[0044] Preparation of cathode material precursors for lithium-ion batteries:

[0045] S1, according to coprecipitation reaction product is (Ni 0.5 co 0.2 mn 0.3 ) 0.99 Al 0.01 (OH) 2 The ratio of nickel sulfate, cobalt sulfate, manganese sulfate, aluminum sulfate is dissolved in water, obtains the first mixed solution that metal ion concentration is 1.8mol / L;

[0046] S2, according to the co-precipitation reaction product is Ni 0.5 co 0.2 mn 0.3 (OH) 2 The ratio of nickel sulfate, cobalt sulfate, manganese sulfate is dissolved in water, obtains the second mixed solution that metal ion concentration is 1.8mol / L;

[0047] S3. Under the protection of nitrogen, continuously add the first mixed solution, the sodium hydroxide solution with a concentration of 4mol / L and the ammonia solution with a concentration of 7mol / L to the reactor, and control the feeding flow rate of the first mixed solution to 30mL / min, NH in the reaction system 3 The concentration is 5g / L, the pH ...

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 precursor. The precursor obtained by regulating raw material components and reaction conditions at different stages of a coprecipitation method comprises an inner core and a shell wrapping the outer surface of the inner core, the inner core is loose and has a porous structure, and the chemical composition of the inner core is shown as a general formula (NiaCobMnc)1-xAlx(OH)2; and the shell is compact, and the chemical composition of the shell is shown as a general formula of NidCoeMnf(OH)2. The process for preparing the precursor is simple, the ammonia water consumption is low, the element precipitation uniformity is good, the method is suitable for large-scale industrial production, the positive electrode material prepared from the precursor has an obvious hollow structure, the wettability of an electrolyte can be improved after the positive electrode material is prepared into a lithium ion battery, and the power performance of the battery is improved.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery cathode materials, in particular to a lithium-ion battery cathode material precursor, a preparation method thereof, and a lithium-ion battery cathode material. Background technique [0002] In recent years, with the rapid development of new energy vehicles, higher requirements have been placed on the capacity, power, safety, and cycle performance of lithium-ion power batteries. Especially for hybrid electric vehicles, the power performance requirements of batteries are particularly significant, and the current main development direction of power batteries is the structural design of power batteries, and there is little research on the bottleneck condition of positive electrode materials. At present, the main modification direction of positive electrode materials for power lithium-ion batteries is to control the particle size distribution and size of the materials, and then improve the ...

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): C01G53/00H01M4/485H01M4/505H01M4/525H01M10/0525
CPCC01G53/006H01M4/485H01M4/505H01M4/525H01M10/0525H01M2004/028C01P2004/03C01P2006/40Y02E60/10
Inventor 雷天起陈龙李道聪杨茂萍
Owner HEFEI GUOXUAN HIGH TECH POWER ENERGY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
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