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

Compounded carbon nanotube and graphene conductive slurry for lithium-ion secondary battery

A carbon nanotube, secondary battery technology, applied in secondary batteries, battery electrodes, conductive materials dispersed in non-conductive inorganic materials, etc., to achieve the effects of improved performance, reduced application costs, and simple preparation methods

Active Publication Date: 2015-01-07
JIANGSU CNANO TECHNOLOGY CO LTD
View PDF4 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The composite material technology of graphene and carbon nanotubes has been greatly developed. For example, patent CN103794379 discloses a graphene / carbon nanotube composite material and its preparation method. The composite material prepared by this method can be used to make supercapacitors. However, there is currently no conductive paste that can meet the compounding of carbon nanotubes and graphene, and realize the automatic feeding process requirements of lithium-ion secondary battery factories.

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
  • Compounded carbon nanotube and graphene conductive slurry for lithium-ion secondary battery
  • Compounded carbon nanotube and graphene conductive slurry for lithium-ion secondary battery
  • Compounded carbon nanotube and graphene conductive slurry for lithium-ion secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 470 grams of N-methylpyrrolidone, add 5 grams of polyvinylpyrrolidone, stir to dissolve; stir vigorously, add 20 grams of multi-walled carbon nanotubes and 5 grams of graphene at the same time, and its specific surface area is about 150m 2 / g; 3000RPM, sand mill 3h to obtain slurry A1; figure 1 Its SEM image.

[0021] The viscosity of the slurry was tested with a Brookfield viscometer, and compared with the pure carbon nanotube slurry A3. Table 1 shows. The obtained slurry is compounded with LFP-P2, and the mass percent of each component in the compound is: LFP: multi-walled carbon nanotubes: graphene: dispersant: PVDF=94.6%: 1.6%: 0.4%: 0.4%: 3%, made into buckle, test battery performance. At the same time, compared with pure carbon nanotube slurry: CNT:LFP:CNT:dispersant:PVDF=94.6%:2%:0.4%:3%. The battery performance of different rate of button battery is as follows: figure 2 shown

Embodiment 2

[0023] Weigh 470 grams of N-methylpyrrolidone, add 5 grams of polyvinylpyrrolidone, stir to dissolve; stir vigorously, add 20 grams of multi-walled carbon nanotubes and 5 grams of graphene at the same time, and its specific surface area is about 50m 2 / g; 3000RPM, sand mill 3h to obtain slurry A2; image 3 Its SEM picture.

[0024] The viscosity of the slurry was tested with a Brookfield viscometer, and compared with the pure carbon nanotube slurry as shown in Table 1.

[0025] Table 1. Slurry Viscosity

[0026] slurry CNT: Graphene Graphene BET m 2 / g Viscosity mPa.s A1 4∶1 150 19000 A2 4∶1 50 8000 A3 5∶0 78000

[0027] The obtained slurry is compounded with LFP-P2, and the mass percent of each component in the compound is: LFP: multi-walled carbon nanotubes: graphene: dispersant: PVDF=94.6%: 1.6%: 0.4%: 0.4%: 3%, made into buckle, test battery performance. At the same time, compared with pure carbon nanotube slurry: CNT:LFP:CNT...

Embodiment 3

[0029] Weigh 470 grams of N-methylpyrrolidone, add 5 grams of polyvinyl alcohol, stir and dissolve; vigorously stir, add 20 grams of multi-walled carbon nanotubes and 5 grams of graphene at the same time, and its specific surface area is about 100m 2 / g; 3000RPM, sand milling for 3h to obtain slurry.

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
viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses compounded carbon nanotube and graphene conductive slurry for a lithium-ion secondary battery, belonging to the technical field of preparation of materials for batteries. The slurry is prepared from the following components by mass percent: 2% to 4.5% of carbon nanotubes, 0.5% to 1.5% of graphene, 0.1% to 1.5% of a dispersion stabilizer and the balance being 1-methyl-2-pyrrolidinone. The conductive slurry prepared by compounding the carbon nanotubes with graphene has low viscosity so as to meet requirements of an automatic feeding process adopted in a lithium-ion secondary battery factory, and a point-line-area conductive network structure is formed among positive materials, the carbon nanotubes and graphene due to added graphene, so that the performance of the lithium-ion battery is improved.

Description

technical field [0001] The invention belongs to the technical field of battery material preparation, and in particular relates to a carbon nanotube and graphene composite conductive paste for lithium ion secondary batteries. Background technique [0002] The carbon nanotube slurry used in lithium-ion secondary batteries is not suitable for the automatic feeding process of lithium-ion secondary battery factories due to the large specific surface area and high viscosity of carbon nanotubes. However, carbon nanotubes are compounded with traditional conductive agents such as carbon black, acetylene black, and conductive graphite. Although low-viscosity slurry can also be obtained, the performance of lithium-ion batteries has declined. [0003] The composite material technology of graphene and carbon nanotubes has been greatly developed. For example, patent CN103794379 discloses a graphene / carbon nanotube composite material and its preparation method. The composite material prepa...

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): H01M4/62H01M4/04H01B1/24
CPCH01M4/139H01M4/362H01M4/625H01M10/0525Y02E60/10
Inventor 毛鸥谢宝东冯光辉郑涛
Owner JIANGSU CNANO TECHNOLOGY CO LTD
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