Check patentability & draft patents in minutes with Patsnap Eureka AI!

Method for coating graphite anode material of lithium ion battery with graphene and application thereof

A lithium-ion battery and graphene-coated technology, which is applied to battery electrodes, secondary batteries, circuits, etc., can solve problems such as agglomeration problems, reduced cycle life of negative electrode materials, cracking and pulverization of graphite particles, etc. , to achieve the effect of excellent cycle performance, good coating effect and high purity

Inactive Publication Date: 2015-08-26
THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH
View PDF4 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an emerging material, the self-agglomeration problem of graphene has not been well solved.
It is easy to cause the graphite layer to peel off gradually, and the graphite particles to crack and pulverize, thereby reducing the cycle life of the negative electrode material

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 coating graphite anode material of lithium ion battery with graphene and application thereof
  • Method for coating graphite anode material of lithium ion battery with graphene and application thereof
  • Method for coating graphite anode material of lithium ion battery with graphene and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Weigh 10g of graphite sample (natural spherical graphite) into a 250ml beaker, add a small amount of ethanol, stir and disperse with ultrasound, then add water, ultrasound, and make 100ml of graphite suspension;

[0028] 2. Weigh 0.2g of graphite oxide into a 100ml beaker, add water, and make 50ml of graphene oxide aqueous solution under ultrasonic stirring;

[0029] 3. Under stirring, slowly add 50ml of graphene oxide aqueous solution to 100ml of graphite suspension, then ultrasonic for 30 minutes, and continue to stir for 2 hours to obtain a mixed solution;

[0030] 4. Suction filter the above mixture, and dry the obtained solid powder in a fume hood overnight, and then dry it in a vacuum oven at 50°C for 10 hours;

[0031] 5. Put the dried solid powder sample into the tube furnace, pass through N 2 (Flow rate 50ml / min), then raised to 800°C at 2°C / min, sintered at this temperature for 2 hours and then cooled to room temperature to obtain a graphene-coated graphit...

Embodiment 2

[0036] Change the sintering temperature to 900°C, and other conditions are as in Example 1.

Embodiment 3

[0038] Change the sintering time to 4 hours, and other conditions are as in Example 1.

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 discloses a method for coating graphite anode material of a lithium ion battery with graphene, comprising the following steps: (1) ultrasonically dispersing graphite in solvent to obtain a graphite suspension liquid; (2) ultrasonically dissolving graphite oxide in the solvent to obtain a graphene oxide solution; (3) adding the graphene oxide solution in the graphite suspension liquid according to mass ratio of the graphene oxide and the graphite, which is 0.01 to 0.3:1, ultrasonically mixing, and then removing the solvent to obtain dried solid powder; (4) processing the solid powder obtained in the step (3) at the temperature of 600 to 1000 degrees centigrade for 1 to 4 hours under inert atmosphere and cooling to obtain the graphite anode material of the lithium ion battery coated with the graphite. The method of the invention is simple and practicable, low in energy dissipation, environmentally friendly, low in cost, excellent in coating effect, high in purity and suitable for large batch commercial process. When being used as the lithium ion battery anode material, the conductive agent is not needed, and the cycle performance is very good. The initial efficiency reaches 90 percent.

Description

technical field [0001] The invention belongs to the field of lithium-ion batteries, and in particular relates to a method for coating graphite negative electrode materials of lithium-ion batteries with graphene and an application thereof. Background technique [0002] As a new power source, lithium-ion battery has been put into practical use in the 1970s. Because of its advantages of high energy density, high battery voltage and long storage life, it has been widely used in various portable electronic products and power tools, especially in Electric vehicle (EV) and hybrid electric vehicle (HEV) power sources play an important role. [0003] Anode materials are one of the key materials for lithium-ion batteries, and carbonaceous materials are the earliest materials that people began to study and apply to the anode of lithium-ion batteries, and they are still widely concerned. Carbonaceous materials mainly have the following advantages: high specific capacity (200-400mAh / g),...

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): H01M4/36H01M4/587H01M10/0525
CPCH01M4/366H01M4/587H01M10/0525Y02E60/10
Inventor 高坡瞿研
Owner THE SIXTH ELEMENT CHANGZHOU MATERIALS TECH
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