Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of nitrogen-doped lithium titanate composite material and its preparation method and lithium ion battery

A technology of composite materials and heterolithium titanate, which is applied in the direction of battery electrodes, secondary batteries, circuits, etc., can solve the problems of no increase in specific capacity and limited improvement in conductivity, and achieve good conductivity, fast diffusion speed, and low production cost. low effect

Active Publication Date: 2020-02-18
SHENZHEN UNIV
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a nitrogen-doped lithium titanate composite material and its preparation method and lithium ion battery, aiming at solving the problem of the carbon coating of lithium titanate in the existing method and the poor conductivity. The problem of limited improvement and no improvement in comparison capacity

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
  • A kind of nitrogen-doped lithium titanate composite material and its preparation method and lithium ion battery
  • A kind of nitrogen-doped lithium titanate composite material and its preparation method and lithium ion battery
  • A kind of nitrogen-doped lithium titanate composite material and its preparation method and lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] The preparation method of the nitrogen-doped lithium titanate composite material in this embodiment comprises the following steps:

[0053] Weigh 4.25g of lithium acetate, 17.36g of butyl titanate, 0.48g of nano-metal titanium powder, 1g of polyethylene glycol, and 25g of absolute ethanol.

[0054] Firstly, polyethylene glycol was added into absolute ethanol, and then the nano-titanium powder was ultrasonically dispersed in the absolute alcohol containing polyethylene glycol, and ultrasonically dispersed for 2 hours.

[0055] Take 15 g of absolute ethanol dispersed with nano-titanium powder, add butyl titanate into it, add lithium acetate into the rest of the absolute ethanol dispersed with nano-titanium powder, and mix the two solutions under stirring conditions to prepare a sol.

[0056] The sol was heated to 60°C and stirred at constant temperature for 4 hours to form a gel.

[0057] Dry the gel at 120°C to obtain the precursor.

[0058] Raise the temperature of th...

Embodiment 2

[0061] The preparation method of the nitrogen-doped lithium titanate composite material in this embodiment comprises the following steps:

[0062] Weigh 4.25g of lithium acetate, 17.36g of butyl titanate, 0.48g of nano-metal titanium powder, 1g of polyethylene glycol, and 25g of absolute ethanol.

[0063] Firstly, polyethylene glycol was added into absolute ethanol, and then the nano-metal titanium powder was ultrasonically dispersed in the absolute alcohol containing polyethylene glycol, and ultrasonically dispersed for 2 hours.

[0064] Take 15 g of absolute ethanol dispersed with nano-metal titanium powder, add butyl titanate into it, add lithium acetate into the remaining absolute ethanol dispersed with nano-metal titanium powder, and mix the two solutions under stirring conditions to prepare a sol.

[0065] The sol was heated to 60°C and stirred at constant temperature for 4 hours to form a gel.

[0066] Dry the gel at 120°C to obtain the precursor.

[0067] Raise the t...

Embodiment 3

[0070] The preparation method of the nitrogen-doped lithium titanate composite material in this embodiment comprises the following steps:

[0071] Weigh 4.25g of lithium acetate, 17.36g of butyl titanate, 0.48g of nano-metal titanium powder, 1g of polyethylene glycol, and 25g of absolute ethanol.

[0072] Firstly, polyethylene glycol was added into absolute ethanol, and then the nano-metal titanium powder was ultrasonically dispersed in the absolute alcohol containing polyethylene glycol, and ultrasonically dispersed for 2 hours.

[0073] Take 15 g of absolute ethanol dispersed with nano-metal titanium powder, add butyl titanate into it, add lithium acetate into the remaining absolute ethanol dispersed with nano-metal titanium powder, and mix the two solutions under stirring conditions to prepare a sol.

[0074] The sol was heated to 60°C and stirred at constant temperature for 4 hours to form a gel.

[0075] Dry the gel at 120°C to obtain the precursor.

[0076] Raise the t...

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

Disclosed in the present invention are a nitrogen-doped lithium titanate composite material and a preparation method therefor, and a lithium-ion battery. The preparation method comprises the steps of: dispersing nanoparticles into a solvent containing a dispersant; dividing the solvent in which the nanoparticles are dispersed into two parts, adding a lithium source to one part of solution, adding a titanium source to the other part of solution, and then mixing the two parts of solutions to prepare sol; heating the sol to 40-100°C, and stirring at constant temperature for 4-10 h to form a gel; removing the solvent from the gel at 100-200°C to obtain a precursor; and heating the precursor to 700-1,000°C in an inert atmosphere, then calcining in a reductive atmosphere for 5-20 h, and finally cooling and grinding to obtaining the nitrogen-doped lithium titanate composite material. The nitrogen-doped lithium titanate composite material prepared by the present invention has good electronic conductivity, achieves a high lithium-ion diffusion rate, and has a stable structure; and the lithium-ion battery of the present invention has a long service life.

Description

technical field [0001] The invention relates to the technical field of battery materials, in particular to a nitrogen-doped lithium titanate composite material, a preparation method thereof, and a lithium ion battery. Background technique [0002] At present, the research focus of negative electrode materials for lithium-ion batteries is developing in the direction of power battery materials with high specific capacity, large rate, high cycle performance and high safety performance. The traditional negative electrode material is carbon negative electrode material. Although the carbon anode has been successfully commercialized, its battery safety problems, especially at high rates, force people to look for safe and reliable new anode materials that can intercalate lithium at a slightly higher potential than the carbon anode. Among them, low-potential transition metal oxides and composite oxides have attracted widespread attention as negative electrode materials for lithium-i...

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 Patents(China)
IPC IPC(8): H01M4/485H01M4/36H01M10/0525
CPCH01M4/362H01M4/485H01M10/0525Y02E60/10
Inventor 李瑛苏陈良俞兆喆田冰冰
Owner SHENZHEN UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com