Hydrothermal synthesis method of nano-lithium titanate material
A technology of nano-lithium titanate and hydrothermal synthesis, applied in nanotechnology, electrical components, battery electrodes, etc., can solve the problems of poor rate discharge performance, achieve good rate discharge performance, uniform product particle size distribution, and easy control
Inactive Publication Date: 2015-01-21
SHANDONG GOLDENCELL ELECTRONICS TECH
View PDF3 Cites 11 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0023] (1) Lithium hydroxide and butyl titanate were mixed uniformly according to the molar ratio of 4:5, and then added to a stainless steel reactor for hydrothermal reaction. The reaction temperature is 180° C., and the reaction time is 12 hours.
[0024] (2) Centrifuge the reaction product, wash it several times with deionized water, and then put it into an electric blast drying oven at 110 ° C for 3 h, and then sinter the dried product at 650 ° C for 2 h under the protection of nitrogen to obtain Li 4 Ti 5 o 12 Material.
[0025] (3) Weigh a certain amount of Li according to the mass ratio of 9:1 4 Ti 5 o 12 With glucose, add deionized water as a dispersant, mix it and put it into a box-type resistance furnace for sintering at 750°C for 4 hours. After the resistance furnace is cooled, take out the material, grind it and sieve it, and finally obtain a carbon-coated nano-lithium titanate material.
[0026] The carbon-coated Li prepared by embodiment 1 4 Ti 5 o 12 Th...
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
| Property | Measurement | Unit |
|---|---|---|
| particle diameter | aaaaa | aaaaa |
Login to View More
Abstract
The invention relates to a hydrothermal synthesis method of a nano-lithium titanate material, belonging to the technical field of lithium ion battery materials. The hydrothermal synthesis method provided by the invention mainly comprises the following process steps: firstly uniformly mixing a titanium source and a lithium source according to a certain molar ratio, and arranging the mixture into a stainless steel reaction kettle to perform hydrothermal reaction, wherein the reaction temperature is 150-210 DEG C and the reaction time is 10-24h; performing centrifugal separation, washing, drying and thermal treatment on a product to obtain a Li4Ti5O12 material; and then performing carbon coating modification on the Li4Ti5O12 material and sintering at the temperature of 750-1000 DEG C under the protection of nitrogen for 4-8h to finally obtain a carbon-coated nano-lithium titanate material, wherein the carbon content in the carbon-coated nano-lithium titanate material is 3%-5%. According to the hydrothermal synthesis method provided by the invention, the synthesis process is simple, and the prepared lithium titanate material has the particle size of 100-200nm and has the advantages of high specific capacity, good rate performance and the like as a negative pole material of a lithium ion battery.
Description
technical field [0001] The invention belongs to the technical field of lithium ion battery materials, and in particular relates to a hydrothermal synthesis method of nanometer lithium titanate material. Background technique [0002] In recent years, in response to the national green energy call for low-carbon environmental protection, energy conservation and emission reduction, my country has determined the development of electric vehicles as the main direction of the future development of the automobile industry. At the same time, the development and application of electric vehicles put forward higher requirements for the safety, service life and fast charging and discharging performance of power batteries. At present, the negative electrodes of commercialized lithium-ion batteries are mainly made of carbon materials. During the high-current charge and discharge process of batteries, lithium dendrites are easily formed on the surface of the negative electrodes, causing irre...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1397
CPCB82Y40/00H01M4/1391H01M4/485Y02E60/10
Inventor 关成善宗继月李涛刘艳辉梅庆虎
Owner SHANDONG GOLDENCELL ELECTRONICS TECH