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

Mechanical force-assisted solid-phase synthesis method of lithium titanate negative electrode material

A negative electrode material, solid-phase synthesis technology, applied in negative electrodes, battery electrodes, active material electrodes, etc., can solve the problems of uneven product particles, high energy consumption, easy agglomeration, etc., to achieve stable product performance, inhibition of agglomeration and two effect of secondary growth

Inactive Publication Date: 2019-07-16
NORTHEASTERN UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The solid-phase synthesis method has the advantages of simple process flow and easy operation, but it also has disadvantages such as long process time, high energy consumption, uneven product particles, and easy agglomeration.

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
  • Mechanical force-assisted solid-phase synthesis method of lithium titanate negative electrode material
  • Mechanical force-assisted solid-phase synthesis method of lithium titanate negative electrode material
  • Mechanical force-assisted solid-phase synthesis method of lithium titanate negative electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment example 1

[0053] Implementation Case 1: LiOH·H 2 O and TiO 2 Mix according to Li:Ti=0.82:1, put stainless steel grinding balls and materials into the ball milling tank according to the ball-to-material ratio of 10:1, start the ball mill motor to make the grinding balls stir, grind and crush the materials, and run the high temperature furnace at the same time, Set the heating rate to 5°C / min, raise the temperature to 750°C and keep it warm for 3.5h, wait for the equipment to cool down naturally, then take out the product to obtain pure phase Li 4 Ti 5 o 12 .

[0054] Such as Figure 2-Figure 4 Shown, the prepared Li in embodiment 1 4 Ti 5 o 12 The performance in physical and chemical property testing is very good.

Embodiment example 2

[0055] Implementation Case 2: Put Li 2 CO 3 with TiO 2 Mix according to Li:Ti=0.83:1, put zirconia grinding balls and materials into the ball mill pot according to the ball-to-material ratio of 8:1, start the ball mill motor to make the grinding balls stir, grind and crush the materials, and run the high-temperature furnace at the same time , set the heating rate to 3°C / min, raise the temperature to 760°C for 4 hours, wait for the equipment to cool naturally, take out the product, and obtain pure phase Li 4 Ti 5 o 12 .

Embodiment example 3

[0056] Implementation Case 3: Put Li 2 CO 3 Mix with metatitanic acid according to Li:Ti=0.85:1, put zirconia grinding balls and materials into the ball mill tank according to the ball-to-material ratio of 15:1, start the ball mill motor to make the grinding balls stir, grind and crush the materials, At the same time, run the high-temperature furnace, set the heating rate at 10°C / min, raise the temperature to 780°C and keep it for 4.5h, wait for the equipment to cool down naturally, and take out the product to obtain pure phase Li 4 Ti 5 o 12 .

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 belongs to the technical field of batteries, and particularly relates to a mechanical force-assisted solid-phase synthesis method of a lithium titanate negative electrode material. Whena solid-phase synthesis method is adopted to synthesize the lithium titanate negative electrode material, grinding treatment is carried out on a titanium source material and a lithium source materialby utilizing mechanical force in an assisted mode to obtain a pure-phase lithium titanate negative electrode material. The method further comprises the following steps of S1, mixing the titanium source material and the lithium source material according to a stoichiometric ratio to obtain a mixed reaction material; S2, putting the obtained mixed reaction material into a reaction zone; and S3, heating the mixed reaction material in the reaction zone, carrying out heat preservation and cooling processes, then carrying out grinding treatment on the mixed reaction material by virtue of a grinding ball, and cooling to obtain the pure-phase lithium titanate negative electrode material. The method for synthesizing the lithium titanate negative electrode material provided by the invention has the advantages that the process time can be shortened, the process energy consumption can be reduced, and the product performance can be improved.

Description

technical field [0001] The invention belongs to the technical field of batteries, in particular to a method for mechanically assisted solid-phase synthesis of lithium titanate negative electrode materials. Background technique [0002] Li 4 Ti 5 o 12 The unit cell constant and volume change rate of negative electrode materials are less than 1% during the process of lithium intercalation / delithiation. They have the advantages of stable structure, long life, and high safety. Therefore, they have attracted extensive attention in the fields of power and energy storage. The solid-phase synthesis method is a general method for industrially synthesizing lithium titanate, usually LiOH·H 2 O or Li 2 CO 3 and TiO 2 The raw materials are ground for a long time by mechanical ball milling to make the materials evenly mixed, and then sintered at above 800°C. [0003] The solid-phase synthesis method has the advantages of simple process flow and easy operation, but it also has disad...

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): H01M4/485
CPCH01M4/485H01M2004/027Y02E60/10
Inventor 韩庆孙震宇彭成马少博
Owner NORTHEASTERN UNIV
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