Preparation method suitable for industrial production and used for nano lithium titanate

A technology of nano-lithium titanate and lithium titanate, which is applied in the direction of electrochemical generators, electrical components, battery electrodes, etc., can solve the problem of unsuitable industrial production of nano-lithium titanate materials, unsuitable for industrial production, and difficult control of process conditions, etc. problems, to achieve the effect of short electron conduction path, cheap raw materials, and environmental friendliness

Inactive Publication Date: 2016-11-23
RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sol-gel method has uniform chemical reaction, can achieve atomic-level distribution, controllable stoichiometric ratio, low heat treatment temperature, and can be made into nano-powder; disadvantages: high raw material cost, low yield, large water consumption, and waste water pollution Environment, long process flow, high requirements on equipment; hydrothermal ion exchange synthesis method uses a low-temperature hydrothermal reactor at 100-200 °C to achieve ion exchange, and t

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
  • Preparation method suitable for industrial production and used for nano lithium titanate
  • Preparation method suitable for industrial production and used for nano lithium titanate
  • Preparation method suitable for industrial production and used for nano lithium titanate

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0039] Example 1:

[0040] Such as figure 1 The process flow shown. Take 50kg of amorphous Ti with an average particle size of 50nm 0.99 Zr 0.01 O 2 Is the titanium source, Li 2 CO 3 Lithium source, according to the ratio Li:(Ti 0.99 Zr 0.01 )(mol%)=4:5; glucose is the carbon source, and the carbon content accounts for 2wt% of the final synthesized lithium titanate. Weigh each raw material; add purified water as a dispersant, adjust the solid content to 50wt%, and mix uniformly by ball milling Then the precursor mixed slurry is obtained; using spray drying equipment, the hot gas nozzle inlet temperature is 120℃, the outlet temperature is 100℃, the slurry inlet flow rate is 20ml / min, and the gas inlet flow rate is 30m. 3 / h, spray drying the slurry to obtain dry and loose lithium titanate precursor powder; put the obtained powder in an atmosphere furnace and pass N 2 Keep it at 750℃ for 8 hours, cool to room temperature and sieving. After sieving, the semi-finished product has a pa...

Example Embodiment

[0043] Example 2:

[0044] Such as figure 1 The process flow shown. Using 200kg anatase Ti with an average particle size of 100nm 0.98 Al 0.02 O 2 Is the titanium source, Li 2 CO 3 Lithium source, according to the ratio Li:(Ti 0.98 Al 0.02 )(mol%)=4:5; carboxymethyl cellulose is the carbon source, and the carbon content accounts for 0.5wt% of the synthetic lithium titanate. Weigh the raw materials; add distilled water as a dispersant to adjust the solid content to 40wt%, The mixed slurry of the precursor is obtained after uniform ball milling; spray drying equipment is used, the inlet temperature of the hot gas nozzle is 180°C, the outlet temperature is 100°C, the slurry inlet flow rate is 30ml / min, and the gas inlet flow rate is 40m. 3 / h, spray drying the slurry to obtain dry and loose lithium titanate precursor powder; put the obtained powder in an atmosphere furnace and pass N 2 Keep it at 780℃ for 12 hours, cool to room temperature and sieving. The sieved semi-finished produc...

Example Embodiment

[0045] Example 3:

[0046] Such as figure 1 The process flow shown. Using 500kg anatase Ti with an average particle size of 60nm 0.995 Na 0.005 O 2 Is the titanium source, Li 2 CO 3 Lithium source, according to the ratio Li:(Ti 0.995 Na 0.005 )(mol%)=4:5; polyethylene glycol is the carbon source, and the carbon content accounts for 1wt% of the synthetic lithium titanate. Weigh each raw material; add ultrapure water as a dispersant, adjust the solid content to 55wt%, The mixed slurry of the precursor is obtained after uniform ball milling; spray drying equipment is used, the inlet temperature of the hot gas nozzle is 200°C, the outlet temperature is 120°C, the slurry inlet flow rate is 25ml / min, and the gas inlet flow rate is 50m. 3 / h, spray drying the slurry to obtain dry and loose lithium titanate precursor powder; put the obtained powder in an atmosphere furnace and pass N 2 Keep the temperature at 770°C for 16 hours, cool to room temperature and sieving. After sieving, the par...

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
The average particle sizeaaaaaaaaaa
The average particle sizeaaaaaaaaaa
Login to view more

Abstract

The invention provides a preparation method suitable for industrial production and used for a lithium ion battery anode material nano lithium titanate. The preparation method comprises steps as follows: nanoscale Ti<1-x>MxO2(M is Al, Mg, Ag, Zr, Na, K, Zn or Ca; x is larger than or equal to 0 and smaller than or equal to 0.2) is selected as a titanium source, a lithium source and organic carbon source are added in proportion, water is adopted as a dispersant, wet ball milling and mixing are performed, a precursor is obtained with a pray drying technology, and a doped nano spinel lithium titanate material is obtained through high-temperature treatment. The method adopts cheap raw materials, adopts a simple technology and short processes, is environment-friendly, has low equipment requirement and is suitable for industrial production of the nano lithium titanate material.

Description

technical field [0001] The invention relates to the preparation of a lithium ion battery negative electrode material, in particular to an industrial preparation method of a lithium ion battery negative electrode material nanometer lithium titanate. Background technique [0002] With the widespread application of lithium-ion batteries in hybrid and pure electric vehicles, people have put forward higher requirements for the safety, rate performance and service life of lithium-ion electrode materials. Lithium titanate (Li 4 Ti 5 o 12 ) has the characteristic of "zero strain", during the charging and discharging process of the battery, Li + The insertion and extraction of Li 4 Ti 5 o 12 The crystal structure of the material has little effect and has good cycle performance. At the same time, compared with the currently widely used carbon anode materials for lithium-ion batteries, Li 4 Ti 5 o 12 It also has a high lithium intercalation potential (1.55V Li + / Li), so tha...

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): H01M4/485H01M10/0525
CPCH01M4/485H01M10/0525Y02E60/10
Inventor 刘建红王兴勤王赛高云吴宁宁
Owner RISESUN MENGGULI NEW ENERGY SCIENCE & TECHNOLOGY CO LTD
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
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap