A kind of conductive paste and its preparation method and application, battery

A technology of conductive paste and conductive material, applied in conductive materials dispersed in non-conductive inorganic materials, battery electrodes, secondary batteries, etc., can solve problems such as battery performance degradation, and achieve the effect of alleviating specific surface area

Active Publication Date: 2021-04-16
安徽信敏惠新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a conductive paste and its preparation method and application, battery, to reduce the viscosity of the conductive paste, to solve the problem of performance degradation of the battery caused by adding an excessive amount of viscosity modifier in the preparation process

Method used

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  • A kind of conductive paste and its preparation method and application, battery
  • A kind of conductive paste and its preparation method and application, battery
  • A kind of conductive paste and its preparation method and application, battery

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preparation example Construction

[0025] The embodiment of the present invention provides a kind of preparation method of conductive paste, such as figure 1 Shown, the preparation method of this conductive paste comprises:

[0026] Step S100: providing a carbonaceous conductive material, the carbonaceous conductive material at least includes carbon nanotubes. The size of carbon nanotubes can be adjusted according to actual conditions. For example: in order to improve battery performance, the purity of carbon nanotubes is greater than 98.5%, the diameter of carbon nanotubes ranges from 5nm to 15nm, and the specific surface area of ​​carbon nanotubes is greater than 260m 2 / g. At this time, the carbon nanotubes have a small diameter, high purity and high specific surface area. When the conductive paste prepared from the carbonaceous conductive material including the carbon nanotubes is used in a battery, the energy density and rate performance of the battery can be fully improved. and cycle life performance. ...

Embodiment 1

[0064] The preparation method of the conductive paste provided by the embodiment of the present invention comprises the following steps:

[0065] Step S100: Provide a carbonaceous conductive material, the carbonaceous conductive material only includes carbon nanotubes; the purity of the carbon nanotubes is 99%, the tube diameter is 5nm, and the specific surface area is 270m 2 / g.

[0066] Step S200: forming defects on the tube wall of the carbon nanotubes included in the carbonaceous conductive material to obtain a minimally invasive carbonaceous conductive material; specifically including:

[0067] Step S210: Wetting the zirconium beads used in the tank ball mill with deionized water.

[0068] Step S220: Add 2kg of zirconium beads into a 2L pot-type ball mill, the diameter of the zirconium beads is between 1mm and 5mm; then ball mill 20g of carbonaceous conductive material at a speed of 1000r / min for 5min to obtain a minimally invasive carbonaceous conductive material. Mate...

Embodiment 2

[0075] The preparation method of the conductive paste provided by the embodiment of the present invention comprises the following steps:

[0076] Step S100: Provide a carbonaceous conductive material, the carbonaceous conductive material is a mixture of carbon nanotubes: conductive carbon black with a mass ratio of 3:2; wherein, the purity of the carbon nanotubes is 98.8%, the diameter is 15nm, and the specific surface area 285m 2 / g.

[0077] Step S200: forming defects on the tube wall of the carbon nanotubes included in the carbonaceous conductive material to obtain a minimally invasive carbonaceous conductive material; specifically including:

[0078] Step S210: Wetting the zirconium beads used in the pot ball mill with N-methylpyrrolidone.

[0079] Step S220: Add 2kg of zirconium beads into a 2L pot-type ball mill, the diameter of the zirconium beads is between 1mm and 5mm; then ball mill 300g of carbonaceous conductive material at a speed of 300r / min for 30min to obtain...

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Abstract

The invention discloses a conductive paste, its preparation method and application, and a battery, and relates to the technical field of batteries, which reduces the viscosity of the conductive paste and solves the problem of performance degradation of the battery caused by adding excessive viscosity regulators during the preparation process . The preparation method of the conductive paste provided by the present invention includes: providing a carbonaceous conductive material, the carbonaceous conductive material at least includes carbon nanotubes; forming defects on the tube wall of the carbon nanotubes included in the carbonaceous conductive material to obtain minimally invasive Carbonaceous conductive material; prepare conductive paste with minimally invasive carbonaceous conductive material as conductive agent. The invention is used in batteries.

Description

technical field [0001] The invention relates to the field of battery technology, in particular to a conductive paste, a preparation method and application thereof, and a battery. Background technique [0002] Lithium-ion battery is a secondary battery (rechargeable battery) that mainly relies on the movement of lithium ions between the positive and negative electrodes to work. It has the characteristics of high energy density, good cycle performance, and no memory effect, and has become the focus of researchers in recent years. Among them, the positive electrode material of the lithium-ion battery is generally a transition metal oxide or a phosphate of a transition metal, and their conductivity is low. Therefore, in order to improve the conductivity of the lithium-ion battery, a conductive agent must be added during the preparation of the electrode. [0003] At present, in order to improve the energy density, rate performance and cycle life of lithium-ion batteries, carbon ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B1/24H01B13/00C01B32/158H01M4/62H01M10/0525
CPCC01B32/158H01B1/24H01B13/00H01M4/625H01M10/0525Y02E60/10
Inventor 马力马贺然王滨周建辉杨永旺
Owner 安徽信敏惠新材料科技有限公司
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