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

Ternary precursor material with internally dense and externally loose structure primary particle bulk density, anode material and preparation method thereof

A particle packing density and positive electrode material technology, applied in the direction of structural parts, electrical components, battery electrodes, etc., can solve the problems of high initial capacity, harsh conditions, and large irreversible capacity of layered lithium manganate, and achieve high rate and cycle performance Excellent, simple preparation process, and low material cost

Active Publication Date: 2015-10-21
HARBIN INST OF TECH
View PDF8 Cites 27 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The actual specific capacity of lithium nickelate material is higher, and the cost is lower than that of lithium cobaltate, but the conditions in the preparation process are harsh, and the irreversible capacity of the material is also large due to the structure change caused by cation mixing. In addition, the safety performance of the material is not good. not ideal
Layered lithium manganate has high initial capacity and low cost, but the capacity retention rate is not ideal due to the John-Teller effect during the cycle
[0004] As mentioned above, layered LiMO 2 The practical application of materials (M=Ni, Co, Mn, etc.) is limited due to the defects of their own 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
  • Ternary precursor material with internally dense and externally loose structure primary particle bulk density, anode material and preparation method thereof
  • Ternary precursor material with internally dense and externally loose structure primary particle bulk density, anode material and preparation method thereof
  • Ternary precursor material with internally dense and externally loose structure primary particle bulk density, anode material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The preparation molar ratio is Ni:Co:Mn=8:1:1 and the nickel sulfate, manganese sulfate, cobalt sulfate metal salt solution that total concentration is 2mol / L, the complexing agent ammonia solution of 2.8mol / L, the 2mol / L Precipitating agent Sodium hydroxide solution, 1mol / L sodium dodecylsulfonate hot water solution. Add complexing agent solution, deionized water, and surfactant aqueous solution into the reaction kettle in a total of 800ml according to the molar ratio of 1:6:1, as the reaction bottom liquid at zero time; metal salt solution, 2.8mol / L complexing agent Mixture ammonia solution and 2mol / L precipitant sodium hydroxide solution are added into the high-speed stirring reaction kettle at a certain rate ratio (1:1:2), and the mixed solution of sodium dodecylsulfonate is introduced in the first 12 hours. Control the pH of the entire reaction system at 10±0.3, and control the temperature at 58°C. After 12 hours of reaction, suspend the feeding, and let the soluti...

Embodiment 2

[0061] The preparation molar ratio is Ni:Co:Mn=8:1:1 and the nickel sulfate, manganese sulfate, cobalt sulfate metal salt solution that total concentration is 2mol / L, the complexing agent ammonia solution of 2.8mol / L, the 2mol / L Precipitating agent Sodium carbonate solution, 1mol / L sodium dodecylsulfonate hot water solution. Add complexing agent solution, deionized water, and surfactant aqueous solution into the reaction kettle in a total of 800ml according to the molar ratio of 1:6:1, as the reaction bottom liquid at zero time; metal salt solution, 2.8mol / L complexing agent Mixture ammonia solution and 2mol / L precipitant sodium carbonate solution are added into the high-speed stirring reaction kettle at a certain rate ratio (1:1:1), and the mixed solution of sodium dodecylsulfonate is introduced in the first 12 hours, and the control The pH of the entire reaction system is 10±0.3, and the temperature is controlled at 58°C. After 12 hours of reaction, the feeding is suspended,...

Embodiment 3

[0063] The difference between this example and Example 1 is that the precipitation agent is a mixture of sodium hydroxide and potassium hydroxide, and the molar ratio of the two is 1:1; the lithium source is a mixture of lithium hydroxide, lithium nitrate and lithium sulfate, and hydrogen The molar ratio of lithium oxide, lithium nitrate and lithium sulfate is 1:1:2.

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
densityaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to View More

Abstract

The invention discloses a ternary precursor material with an internally dense and externally loose structure primary particle bulk density, an anode material and a preparation method thereof. The particle of the ternary precursor material has an internally dense and externally loose structure bulk density. The ternary precursor material is NixCoyMn2M1-x-y-z(OH)2 or NixCoyMnzM1-x-y-zCO3, x is greater than 0 and smaller than 1, y is greater than 0 and smaller than 1, z is greater than 0 and smaller than 1, x+y+z is smaller than or equal to 1, M is one or more of Zr, Fe, Sm, Pr, Nb, Ga, Zn, Y, Mg, Al, Cr, Ca, Na, Ti, Cu, K, Sr, Mo, Ba, Ce, Sn, Sb, La and Bi. According to the invention, based on comprehensive consideration of the tap density and rate performance changing situation, the introduction position and concentration of a surfactant are designed, and the accumulation compactness of particles from the inside to the outside at all parts is regulated, thus finally realizing development of the optimal overall performance of the material. The materials prepared by the method provided by the invention have the characteristics of excellent post-sintering rate and cycle performance, and high tap density.

Description

technical field [0001] The invention relates to a ternary precursor material for a lithium ion battery and a preparation method, as well as a positive electrode material prepared from the material and a preparation method. Background technique [0002] Lithium-ion batteries were commercialized in the 1990s and became the most important and widely used secondary batteries. Compared with traditional lead-acid batteries and nickel-based batteries, lithium-ion batteries have the advantages of high energy density (about 100-150Wh / kg), long cycle life, good environmental compatibility, and light weight. As a convenient energy source, lithium-ion batteries are widely used in a variety of portable electronic products, and have greatly promoted the development of industrial society including electronic technology. It is also one of the most promising candidates for energy sources for electric vehicles (EV) and hybrid electric vehicles (HEV). In the current lithium-ion battery techn...

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): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525H01M2004/021Y02E60/10
Inventor 杜春雨闫春秋尹鸽平高云智左朋建程新群马玉林
Owner HARBIN INST OF TECH
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