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

Water-based carbon nanotube slurry and preparation method and application thereof

A technology of carbon nanotubes and slurry, which is applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of low carbon nanotube length and poor conductivity, and improve the performance of silicon negative electrodes, Effect of reducing capacity loss and improving cycle life

Pending Publication Date: 2021-10-29
哈尔滨万鑫石墨谷科技有限公司 +1
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water-based carbon nanotube slurry obtained also has the problems of low carbon nanotube length and poor conductivity.
[0005] The above-mentioned schemes all have the problems that the length of the carbon nanotubes in the water-based carbon nanotube slurry is relatively low and the conductivity is poor. The aqueous carbon nanotube slurry is very necessary

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
  • Water-based carbon nanotube slurry and preparation method and application thereof
  • Water-based carbon nanotube slurry and preparation method and application thereof
  • Water-based carbon nanotube slurry and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] This embodiment provides a water-based carbon nanotube slurry, which is prepared by the following method:

[0043] (1) 8 parts by mass of polyvinylpyrrolidone, 2 parts by mass of dodecylbenzenesulfonate and 80 parts by mass of distilled water were mixed, and sanded for 50 min in zirconium beads with a size of 5 mm to obtain a mixed solution;

[0044] (2) 10 parts by mass of carbon nanotubes are mixed with the mixed solution obtained in step (1) to obtain a mixture, and the mixture is transferred to a sand mill by a diaphragm pump, and sanded for 50 min in zirconium beads with a size of 1 mm to obtain the mixture. The water-based carbon nanotube slurry.

Embodiment 2

[0046] This embodiment provides a water-based carbon nanotube slurry, which is prepared by the following method:

[0047] (1) 10 parts by mass of polyvinylpyrrolidone, 2 parts by mass of dodecylbenzenesulfonate and 76 parts by mass of distilled water were mixed, and sanded for 80 min in zirconium beads with a size of 4 mm to obtain a mixed solution;

[0048] (2) 12 parts by mass of carbon nanotubes are mixed with the mixed solution obtained in step (1) to obtain a mixture, and the mixture is transferred to a sand mill by a diaphragm pump, and sanded for 45 minutes in zirconium beads with a size of 1.5mm to obtain The water-based carbon nanotube slurry.

Embodiment 3

[0050] The only difference between this embodiment and embodiment 1 is that the size of the zirconium beads in step (2) is 0.5 mm, and other conditions and parameters are exactly the same as in embodiment 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

PropertyMeasurementUnit
Sizeaaaaaaaaaa
Lengthaaaaaaaaaa
Sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a water-based carbon nanotube slurry and a preparation method and application thereof, the preparation method comprises the following steps: (1), mixing 1-10 parts by mass of a dispersant, 1-10 parts by mass of a dispersant auxiliary agent and 60-98 parts by mass of a solvent, and performing primary grinding to obtain a mixed solution; and (2), mixing 1-20 parts by mass of carbon nanotubes with the mixed solution obtained in the step (1), and performing secondary grinding for 20-80 minutes to obtain the water-based carbon nanotube slurry. According to the invention, the carbon nanotubes are ensured to have relatively high length while the carbon nanotubes are ensured to be uniformly dispersed, so that the performance of the silicon negative electrode can be improved, the cycle life of the lithium ion battery is effectively prolonged, and the capacity loss caused by battery aging is reduced.

Description

technical field [0001] The invention belongs to the technical field of conductive materials, and relates to a water-based carbon nanotube slurry and a preparation method and application thereof. Background technique [0002] Carbon nanotubes were discovered in the 1990s, and even after mass production, carbon nanotubes have not been widely used in electrochemistry until the dispersion method and dispersion process of carbon nanotubes mature. The application in batteries has gradually become common. Compared with traditional carbon black conductive agents, carbon nanotubes have the advantage of "long-range" conductivity and better conductivity. At present, only single-walled carbon nanotube conductive additives have higher length-to-diameter ratio, but the difficulty of large-scale synthesis of single-walled carbon nanotubes in industrialization, the required amount cannot be provided or the cost is low enough, and it is difficult to be widely used in battery manufacturing an...

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): H01B13/00H01B1/04H01M4/62H01M4/13H01M10/0525G01N23/2251G01N23/2202B82Y30/00B82Y40/00
CPCH01B13/00H01B1/04H01M4/625H01M4/13H01M10/0525G01N23/2251G01N23/2202B82Y30/00B82Y40/00G01N2223/07G01N2223/102Y02E60/10
Inventor 于泽文何斌冯晓彤娄明于平霍美婷
Owner 哈尔滨万鑫石墨谷科技有限公司