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

Method for preparing graphite-titanium oxide composite

A technology of titanium oxide and manufacturing method, applied in the directions of titanium oxide/hydroxide, chemical instruments and methods, graphite, etc., can solve the problems of high irreversible capacity and low thermal stability, achieve common use, delay graphite Structural collapse, improved effect of rate-determining properties

Active Publication Date: 2016-04-13
DONGGUK UNIV IND ACADEMIC COOPERATION FOUND
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, carbon active materials are widely used as cathode active materials of batteries because of their reasonable price and excellent life characteristics, but because of the problems of high initial irreversible capacity and low thermal stability, there is an urgent need to improve them

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 preparing graphite-titanium oxide composite
  • Method for preparing graphite-titanium oxide composite
  • Method for preparing graphite-titanium oxide composite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0089] graphite-lithium titanium oxide (Li 4 Ti 5 o 12 ) complexes

[0090] Firstly, the graphite is dispersed by benzyl alcohol and then filtered to obtain the surface-modified graphite. Next, it is put into ethanol and distilled water for uniform dispersion, and then the titanium precursor is put into it for stirring and hydrolysis, and after a uniform coating is formed on the graphite surface, it is filtered and dried.

[0091] Next, the graphite-titanium oxide powder and lithium hydroxide aqueous solution produced above were put into a polytetrafluoroethylene container, and a hydrothermal synthesis treatment was performed at 80° C. for 10 hours.

[0092] In an argon (Ar) environment at 600°C, the mixture produced by hydrothermal synthesis was heat-treated for 2 hours to complete graphite-lithium titanium oxide (Li 4 Ti 5 o 12 )Complex.

Embodiment 2

[0093] graphite-titanium oxide (TiO 2 ) complexes

[0094] In the graphite-lithium titanium oxide (Li 4 Ti 5 o 12 ) complex, the stage of adding lithium precursors for hydrothermal synthesis is not performed, and graphite-titanium oxide (TiO 2 ).

[0095] X-ray refraction analysis

[0096] In order to analyze the structure of the graphite-(lithium) titanium oxide composite produced in the above-mentioned Examples 1 and 2, X-ray refraction analysis was carried out with graphite particles as a control group. The results are as follows figure 1 , 2 shown.

[0097] Such as figure 1 , 2 As shown, graphite exhibits a characteristic peak (peak), and the graphite-(lithium) titanium oxide composite produced by the present invention also exhibits a characteristic peak at the same 2θ angle as graphite. In addition, as the ratio of titanium precursor to graphite increases, the corresponding Li 4 Ti 5 o 12 , TiO 2 Peak.

[0098] From the above results, it was confirmed tha...

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 present invention relates to a method for preparing a graphite-titanium oxide composite. The method for preparing a graphite-titanium oxide composite, according to the present invention, comprises the steps of: (S1) modifying the surface of graphite with benzyl alcohol or a cellulose-based material using a sol-gel technique; (S2) dispersing the graphite of which the surface is modified with benzyl alcohol or the cellulose-based material in a solvent, adding a titanium precursor, and then mixing same; and (S3) treating the mixture obtained from the step S2 with heat and growing a titanium-based oxide on the surface of the graphite. According to the method for preparing the graphite-titanium oxide in the present invention, by uniformly coating the surface of the graphite with titanium-based oxide, formation of a solid electrolyte inter-phase (SEI) film due to electrolyte decomposition, which occurs during charging and discharging, can be stabilized, thereby delaying collapsing of the structure of the graphite, and securing stable charge and discharge characteristics, which in turn enables securing of excellent life characteristics. Also, insertion of polar solvent molecules of the electrolyte other than lithium-ions on the graphite surface can be reduced thereby allowing improvement of rate control characteristics.

Description

technical field [0001] The invention relates to a manufacturing method of a graphite-titanium oxide composite body, in particular to a manufacturing method of a graphite-titanium oxide composite body capable of improving its charging and discharging characteristics and rate-determining characteristics through simple engineering. Background technique [0002] Batteries are currently widely used in electronic equipment, hybrid electric vehicles (HEV), etc., and their use is expected to expand to electric vehicles (EV), energy storage devices for power generation systems, etc. in the near future. [0003] However, in order to be applicable to such large-scale devices, high energy density and output density as well as safety are required, and many studies have been conducted on this subject. [0004] At present, carbon active materials are widely used as cathode active materials of batteries because of their reasonable price and excellent life characteristics. However, due to th...

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): H01M4/48H01M4/583H01M10/05C01B31/04C01G23/04
CPCC01G23/005C30B7/10C30B29/22H01M4/1393H01M4/587H01M4/62C01P2002/72C01P2004/03C01B32/20C01G23/053C01P2004/80C01P2006/40C30B1/02C30B29/16H01M4/0471H01M4/366Y02E60/10H01M4/485H01M10/0525H01M2004/027C30B1/10H01M4/48H01M4/583C01B32/30
Inventor 姜龙默曺美璐宋多惠李基赫
Owner DONGGUK UNIV IND ACADEMIC COOPERATION FOUND
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