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

Ternary positive electrode material conductive paste using graphene and preparation method of ternary positive electrode material conductive paste

A technology of conductive paste and positive electrode material, which is applied to conductive materials dispersed in non-conductive inorganic materials, cable/conductor manufacturing, circuits, etc. The effect of battery internal resistance, energy density improvement, and stress relief

Pending Publication Date: 2022-08-02
中山烯利来设备科技有限公司
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the poor conductivity of cathode materials in lithium-ion batteries seriously affects the performance of lithium-ion batteries. Therefore, it is necessary to improve the conductivity of cathode materials and improve their utilization efficiency by adding conductive paste.

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

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] The present application also provides a method for preparing the above-mentioned ternary positive electrode material conductive paste, including the following steps: using N-methylpyrrolidone to dissolve polyvinylidene fluoride, conductive carbon black and graphene to prepare a first solution. A second solution was prepared by dissolving the carbon nanotubes using N-methylpyrrolidone and a dispersant. The first solution and the second solution are mixed to a viscosity of 1450-1550 mPa.s to prepare a conductive paste.

[0026] Wherein, the first solution was prepared using N-methylpyrrolidone in 50% of the formula. A second solution was prepared using a 50% formulation amount of N-methylpyrrolidone.

[0027] After the first solution and the second solution are mixed, a homogenizer is used for thorough stirring, and the final viscosity is 1450-1550 mPa.s. Preferably, the viscosity is 1500 mPa.s.

[0028] In addition, the conductive paste should be stored in a low-tempe...

Embodiment 1

[0031] formula:

[0032] According to 100 g per part by weight, 0.0001 part by weight of graphene, 0.5 part by weight of carbon nanotube, 1 part by weight of polyvinylidene fluoride, 3.5 part by weight of conductive carbon black, 95 part by weight of N-methylpyrrolidone, and 0.015 part by weight of dispersant.

[0033] making process:

[0034] The first solution is prepared by dissolving polyvinylidene fluoride, conductive carbon black and graphene with N-methylpyrrolidone in 50% of the formula. A second solution was prepared by dissolving the carbon nanotubes using 50% of the formulation amount of N-methylpyrrolidone and a dispersant. The first solution and the second solution are mixed, and then fully stirred with a homogenizer to finally reach a viscosity of 1500 mPa.s to prepare a conductive paste.

[0035] After the conductive paste of this embodiment is mixed with a 2.5-micron ternary material, the energy density of the battery is 180 mA·h / g, and the number of cycles i...

Embodiment 2

[0037] formula:

[0038] According to 100 g per part by weight, 0.0005 part by weight of graphene, 0.5 part by weight of carbon nanotube, 1 part by weight of polyvinylidene fluoride, 3.5 part by weight of conductive carbon black, 95 part by weight of N-methylpyrrolidone, and 0.015 part by weight of dispersant.

[0039] making process:

[0040] The first solution is prepared by dissolving polyvinylidene fluoride, conductive carbon black and graphene with N-methylpyrrolidone in 50% of the formula. A second solution was prepared by dissolving the carbon nanotubes using 50% of the formulation amount of N-methylpyrrolidone and a dispersant. The first solution and the second solution are mixed, and then fully stirred with a homogenizer to finally reach a viscosity of 1500 mPa.s to prepare a conductive paste.

[0041] After mixing the conductive paste of this embodiment with a ternary material of 3 microns, the energy density of the battery is 193 mA·h / g, and the number of cycles i...

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
viscosityaaaaaaaaaa
Login to View More

Abstract

The invention discloses a ternary positive electrode material conductive paste using graphene and a preparation method of the ternary positive electrode material conductive paste. The conductive paste comprises the following components in parts by weight: 0.0001-0.001 part of graphene, 0.3-0.5 part of carbon nanotubes, 0.9-1 part of polyvinylidene fluoride, 3.5-4 parts of conductive carbon black, 93-95 parts of N-methyl pyrrolidone and 0.009-0.015 part of a dispersing agent. The conductive slurry can improve the conductivity of the ternary positive electrode material, provide more lithium dissolving channels for the positive electrode material, reduce the internal resistance of the battery and bring better change of the battery performance, meanwhile, the ternary material causes unstable material unit cells due to volume change in the application, the stress can be effectively eliminated by using graphene, and the performance of the battery is improved. Meanwhile, by using the graphene, the internal resistance of the ternary material battery can be reduced by ten times, and the energy density can be improved by 15-20%.

Description

technical field [0001] The present application relates to the technical field of ternary positive electrode material conductive paste, in particular to a ternary positive electrode material conductive paste using graphene and a preparation method thereof. Background technique [0002] In recent years, with the development of science and technology and the rising demand for new energy, lithium-ion batteries have become the focus of attention in new energy-related fields. At present, lithium-ion batteries are mainly used in mobile electronic devices, and their applications have begun to develop towards small and light-weight miniature electrical appliances, as well as large-scale electric devices, such as power batteries for new energy vehicles, which affect the performance of lithium-ion batteries. put forward higher requirements. In the application of new energy electric vehicles, power lithium-ion batteries are required to have excellent performances such as high energy de...

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): H01M4/62H01M4/131H01M4/525H01M10/0525H01B1/24H01B13/00
CPCH01M4/625H01M4/131H01M4/525H01M10/0525H01B1/24H01B13/00H01M2004/028Y02E60/10
Inventor 王奉瑾戴雪青胡志坚
Owner 中山烯利来设备科技有限公司