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

A kind of precursor of hollow positive electrode material and preparation method thereof

A technology of cathode materials and precursors, applied in the field of precursors of hollow cathode materials and their preparation, can solve problems such as the inability to meet the requirements of high output power and high cycle characteristics of power batteries, and achieve improved output characteristics and cycle performance , Low production cost, wide application range

Active Publication Date: 2021-07-13
JINCHI ENERGY MATERIALS CO LTD +1
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ternary materials have become the main cathode materials for current power batteries due to their high energy density and good rate performance. However, traditional ternary materials cannot meet the requirements of battery manufacturers for high output power and high cycle characteristics of power batteries.
[0007] To sum up, existing technologies are difficult to produce precursors of hollow materials with narrow particle size and high specific surface area on a large scale and efficiently.

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
  • A kind of precursor of hollow positive electrode material and preparation method thereof
  • A kind of precursor of hollow positive electrode material and preparation method thereof
  • A kind of precursor of hollow positive electrode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Prepare a ternary metal salt solution of nickel sulfate, cobalt sulfate, and manganese sulfate with a total metal concentration of 2mol / L, the molar ratio of nickel, cobalt, and manganese is 50:20:30, and prepare a 2mol / L sodium hydroxide solution. Add pure water into the reaction kettle with a volume of 300L, control the temperature at 70°C, adjust the pH to 11.70 with lye, and continuously feed nitrogen into the reaction kettle.

[0045] During the reaction process of stage I, inject the ternary metal salt solution into the reactor at a flow rate of 60mL / min, control the reaction temperature at 70°C, enter the reaction of stage II after the pH value of the solution drops to 9.50, and start injecting sodium hydroxide Solution, maintain the pH value of the solution within the range of 9.50±0.02, after 6 hours of reaction, increase the flow rate of the ternary metal salt solution to 120mL / min, after 12 hours, increase the flow rate of the ternary metal salt solution to 18...

Embodiment 2

[0049] Prepare a ternary metal salt solution of nickel sulfate, cobalt sulfate, and manganese sulfate with a total metal concentration of 2mol / L, the molar ratio of nickel, cobalt, and manganese is 50:20:30, and prepare a 2mol / L sodium hydroxide solution. Add pure water into the reaction kettle with a volume of 300L, control the temperature at 70°C, adjust the pH to 11.50 with lye, and continuously feed nitrogen into the reaction kettle.

[0050] During the reaction process of stage I, inject the ternary metal salt solution into the reaction kettle at a flow rate of 60mL / min, control the reaction temperature at 70°C, enter stage II reaction after the pH value of the solution drops to 8.90, and start injecting sodium hydroxide solution , maintain the pH value of the solution within the range of 8.90±0.02, after 6 hours of reaction, increase the flow rate of the ternary metal salt solution to 100mL / min, after 10 hours, increase the flow rate of the ternary metal salt solution to ...

Embodiment 3

[0052] Prepare a ternary metal salt solution of nickel sulfate, cobalt sulfate, and manganese sulfate with a total metal concentration of 2mol / L. The molar ratio of nickel, cobalt, and manganese is 35:35:30, and prepare a 2mol / L sodium hydroxide solution. Pure water was added to a reaction kettle with a volume of 100 L, the temperature was controlled at 65° C., the pH was adjusted to 11.70 with lye, and nitrogen gas was continuously introduced into the reaction kettle.

[0053] During the reaction process of stage I, inject the ternary metal salt solution into the reaction kettle at a flow rate of 40mL / min, control the reaction temperature at 70°C, enter stage II reaction after the pH value of the solution drops to 8.90, and start injecting sodium hydroxide solution , maintain the pH value of the solution within the range of 9.8±0.02, after 6 hours of reaction, increase the flow rate of the ternary metal salt solution to 80mL / min, after 12 hours, increase the flow rate of the t...

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
specific surface areaaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of lithium ion battery materials, and discloses a precursor of a hollow positive electrode material and a preparation method thereof. The present invention is divided into two stages in the process of synthesizing the precursor, and by adjusting the flow and pH of the ternary metal salt solution in the reaction process of different stages, a hollow type with narrow particle size distribution and high specific surface area is prepared. Precursors of cathode materials. The process of the invention is simple, there is no additional cost on the basis of the existing mainstream discontinuous method, and it is not only suitable for manganese-containing precursors, but also suitable for nickel-cobalt-aluminum and other manganese-free precursors.

Description

technical field [0001] The invention relates to the technical field of lithium ion battery materials, in particular to a precursor of a hollow positive electrode material with a narrow particle size distribution and a high specific surface area and a preparation method thereof. Background technique [0002] In recent years, the energy crisis and environmental pollution have become increasingly serious. In order to reduce global carbon emissions, governments of various countries have begun to increase investment in the new energy vehicle industry. Hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs) and pure electric vehicles (EVs) and other electric drive devices loaded with lithium-ion batteries have begun to gradually replace pure fuel vehicles. Ternary materials have become the main cathode materials for current power batteries because of their high energy density and good rate performance. However, traditional ternary materials cannot meet the requir...

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 Patents(China)
IPC IPC(8): H01M4/00
CPCC01G53/006C01P2004/01C01P2004/32C01P2004/50C01P2004/61C01P2006/12H01M4/366H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 刘凯胡海诗张海艳胡志兵李玉云黎力苏帅张娉婷熊意球刘庭杰
Owner JINCHI ENERGY MATERIALS CO LTD
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