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

Method for modification of lithium ion battery anode material

A technology for lithium-ion batteries and cathode materials, which is applied in battery electrodes, chemical instruments and methods, circuits, etc., can solve the problems of reducing the specific capacity of the material for the first discharge, the secondary sintering temperature has a great influence, and prolonging the production cycle of the product. The effect of improving cycle stability, improving high temperature storage performance, and environmental pollution-free

Active Publication Date: 2013-10-02
BTR NEW MATERIAL GRP CO LTD
View PDF3 Cites 25 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires secondary high-temperature sintering treatment, and the process is relatively complicated, which not only prolongs the production cycle of the product, increases energy consumption, but also produces more industrial wastewater
Studies have shown that for layered nickel-based cathode materials LiNi 0.8 co 0.1 mn 0.1 o 2 After washing with water, the structural stability and cycle stability of the material in the electrolyte are significantly improved, but the first discharge specific capacity of the material is significantly reduced, and it is greatly affected by the secondary sintering temperature

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
  • Method for modification of lithium ion battery anode material
  • Method for modification of lithium ion battery anode material
  • Method for modification of lithium ion battery anode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] 950 g of ethanol and 50 g of formic acid were placed in a container and stirred and mixed, the rotational speed was controlled at 300 rpm, and the stirring time was 10 min to obtain a mixed organic solution. 1000g LiNi 0.8 co 0.2 o 2 Slowly add the positive electrode material into the above mixed organic solution, continue to stir, control the rotation speed to 100rpm, and stir for 120min to obtain a suspension; put the suspension in a centrifuge and centrifuge at a centrifugal speed of 6000rpm for 10min , and then washed with ethanol for 3 times, the washed material was transferred to a vacuum bench furnace, and dried at 80° C. to obtain a modified positive electrode material. At the same time of centrifugal separation, the waste liquid is transferred to the high-gravity bed equipment for rectification and separation of solvents. The purified and separated organic acids and alcohol solvents are stored in special containers for recycling and reuse.

Embodiment 2

[0043] 500 g of methanol and 500 g of acetic acid were placed in a container and stirred and mixed at a controlled speed of 400 rpm for 30 minutes to obtain a mixed organic solution. 2000g LiNi 0.8 co 0.1 mn 0.1 o 2 Slowly add the positive electrode material into the above mixed organic solution, continue to stir, control the rotation speed to 300rpm, and stir for 240min to obtain a suspension; put the suspension in a centrifuge and centrifuge at a centrifugal speed of 5000rpm for 15min , and then washed with methanol for 5 times, the washed material was transferred to a vacuum bench furnace, dried at 40° C., sieved and classified to obtain a modified positive electrode material. At the same time of centrifugal separation, the waste liquid is transferred to the high-gravity bed equipment for rectification and separation of solvents. The purified and separated organic acids and alcohol solvents are stored in special containers for recycling and reuse.

Embodiment 3

[0045] 800 g of ethanol and 200 g of isopropionic acid were placed in a container and stirred and mixed at a controlled speed of 100 rpm for 10 minutes to obtain a mixed organic solution. 250g LiNi 0.8 co 0.15 Al 0.05 o 2 Slowly add the positive electrode material into the above mixed organic solution, continue to stir, control the rotation speed to 400rpm, and take 30min to obtain a suspension; place the suspension in a centrifuge and centrifuge at a centrifugal speed of 8000rpm for 5min, then Washed with ethanol for 8 times, the washed material was transferred to a vacuum bench furnace, dried at 90°C, screened and classified to obtain a modified positive electrode material. At the same time of centrifugal separation, the waste liquid is transferred to the high-gravity bed equipment for rectification and separation of solvents. The purified and separated organic acids and alcohol solvents are stored in special containers for recycling and reuse.

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 method for modification of a lithium ion battery anode material. The method comprises the following steps of 1, mixing an organic acid and an alcohol into an organic solution, 2, adding an anode material into the organic solution and carrying out mixing to obtain a suspension liquid, 3, carrying out centrifugal separation and carrying out washing by an alcohol solvent, and 4, carrying out drying. The anode material is a Ni-based metal-oxide anode material LiNixM1-xO2, wherein x is greater than or equal to 0.5 and is less than 1 and M represents one or two of Co, Mn, Al, Cr, Mg, Cu, Ti, Mg, Zn, Zr and V. Compared with the prior art, the method utilizes the mixed solution of the alcohol and the organic acid to wash the anode material so that soluble Li salt impurities on the surface of the anode material are removed and a material pH value is obviously reduced. Through low-temperature drying, the washed anode material is coated with alcohol molecules for blocking air so that the binding of water molecules and the anode material is avoided; pole piece gluing is prevented; and high-temperature storage performances and cycle stability of a battery are improved obviously. After washing, the mixed solution of the alcohol and the organic acid can be recycled and thus a cost is low and pollution on the environment is avoided.

Description

technical field [0001] The invention relates to the technical field of a treatment method for a cathode material of a lithium ion battery, in particular to a method for modifying an anode material of a lithium ion battery. Background technique [0002] At present, the commonly used cathode material for high energy density lithium-ion batteries is LiCoO 2 , under the constraints of compaction density, upper limit voltage and other conditions, its energy density has reached the limit, and the polarization of the battery is very large under this energy density, it is difficult to meet the requirements of high output power and long service life. Same as LiCoO 2 Compared with the layered lithium-nickel composite oxide cathode material LiNi x m 1-x o 2 (Where M is one or two of Co, Mn, Al, Cr, Mg, Cu, Ti, Zn, Zr, V, 0.5≤x<1)) Due to its high discharge specific capacity (170~230mAh / g ) and the advantages of low cost have attracted more and more attention in the field of lit...

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): H01M4/48
CPCC01G53/42C01G53/50C01P2004/03C01P2006/40H01M4/525Y02E60/10H01M4/505
Inventor 岳敏杨顺毅黄友元任建国程林
Owner BTR NEW MATERIAL GRP 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