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A kind of production process of lithium battery cathode composite conductive paste

A technology of composite electrical conductivity and production process, which is applied in the field of production technology of composite conductive slurry for lithium battery positive electrode, can solve the problems such as the slurry is not easy to disperse, and the solid content is low, so as to achieve the advantages of not easy to settle, improve electrical conductivity, and reduce production cost. Effect

Active Publication Date: 2020-10-30
厦门劦能科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a production process of lithium battery positive electrode composite conductive paste, the main purpose of which is the problem that the paste is not easy to disperse and has low solid content

Method used

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  • A kind of production process of lithium battery cathode composite conductive paste
  • A kind of production process of lithium battery cathode composite conductive paste
  • A kind of production process of lithium battery cathode composite conductive paste

Examples

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Embodiment 1

[0041] Embodiment 1: A kind of production technology of lithium battery cathode composite conductive paste, the raw material composition of this composite conductive paste and the percentage of each raw material are conductive carbon black SP content 5.1%-6.1%, CNT content 0.5%-1.1%, The content of Ketjen black is 0.3%-0.6%, the content of NMP is 92.2%-94.1%, and the content of polyvinylpyrrolidone is 0-0.25%. Add the composite conductive paste to the high-speed disperser respectively. The high-speed disperser adopts four-stage stirring speed , the four-stage stirring rate includes a first-stage initial stirring rate of 500-1000r / min, a second-stage initial stirring rate of 1500-2000r / min, a third-stage fine stirring rate of 2500-4000r / min and a fourth-stage fine stirring rate of 4500-5000r / min min, the total stirring time of the four-stage stirring is 90-120min.

[0042] The raw material composition of this composite conductive paste and the percentage of each raw material ar...

Embodiment 2

[0051] Embodiment 2: A production process of lithium battery positive electrode composite conductive paste, the raw material composition of the composite conductive paste and the percentage of each raw material are conductive carbon black SP content 5.5%, CNT content 0.75%, Ketjen Black content 0.6% , NMP content 92.9% and polyvinylpyrrolidone content 0.25%, adopt the following processing steps:

[0052] 1) Step 1: Mix CNT and Ketjen Black to make auxiliary materials for later use.

[0053] 2) Step 2: Add 55%-60% of the volume of NMP, 20%-30% of the volume of the auxiliary materials and all polyvinylpyrrolidone into the high-speed disperser for primary primary stirring, the high-speed disperser The stirring head extends to one-third of the liquid surface for stirring, the rotating speed is 500-1000r / min, and the continuous stirring time is 10-15min, preferably 60% of the volume of NMP and 30% of the volume of the auxiliary material, Pre-adding 30% of auxiliary materials is co...

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Abstract

The invention relates to a production process of lithium battery positive electrode composite conductive paste. The raw material constituent and the percent of each raw material of the composite conductive paste are as follows: the content of conductive carbon black SP accounts for 5.1-6.1%, the content of CNT accounts for 0.5-1.1%, the content of Ketjen black accounts for 0.3-0.6%, the content ofNMP accounts for 92.2-94.1%, and the content of polyvinylpyrrolidone accounts for 0-0.25%. By the composite conductive paste, the conductivity of a lithium battery positive electrode material can beimproved, the gram volume can be improved by 2.8-3.2%, and the compaction density can be improved by 5-6.6%. The increment of the used conductive paste is reduced by 0.6-1%, and the production cost ofthe battery can be reduced.

Description

technical field [0001] The invention relates to the field of lithium ion batteries, in particular to a production process of a lithium battery cathode composite conductive paste. Background technique [0002] Lithium-ion batteries have been receiving great attention in consumer electronics and power products due to their high operating voltage, high energy density, long cycle life, safety and environmental protection. As the functions of battery-consuming products become more and more powerful, the demand for battery power is also increasing, so the demand for lithium-ion batteries with high energy density will increase day by day. [0003] For now, lithium battery composite conductive paste is prone to precipitation when stirred, and 1%-2% polyvinylpyrrolidone needs to be added. Contents of the invention [0004] The invention provides a production process of lithium battery positive electrode composite conductive paste, the main purpose of which is to solve the problems...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M10/0525
CPCH01M4/625H01M10/0525Y02E60/10
Inventor 易少扬林国龙
Owner 厦门劦能科技有限公司
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