Process for dispersing carbon nanotubes in electroconductive adhesive of lithium ion battery

A lithium-ion battery, carbon nanotube technology, applied in battery electrodes, circuits, electrode manufacturing, etc., can solve problems such as affecting production quality, low battery capacity, poor consistency, etc., to achieve superior overall electrical conductivity, uniform electrical conductivity, and improved The effect of capacity
CN102709523AInactive Publication Date: 2012-10-03HUNAN FENGYUAN YESHINE KINGCO NEW ENERGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUNAN FENGYUAN YESHINE KINGCO NEW ENERGY
Publication Date
2012-10-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a process for dispersing carbon nanotubes in an electroconductive adhesive of a lithium ion battery. The process comprises the following steps of: firstly, mixing and stirring a solvent, a conductive additive and a dispersant, adding lithium iron phosphate, lithium titanate and aluminium oxide, mixing and stirring uniformly to obtain a pre-mixed electroconductive liquid of the lithium ion battery, and then placing the premixed electroconductive liquid of the lithium ion battery into an internal circulation system composed of a stirring tank and a high-speed dispersing machine for cyclic stirring and dispersing to obtain a uniform electroconductive liquid of the lithium ion battery; and adding a bonding agent into the conductive liquid, and mixing and stirring uniformly to obtain the electroconductive adhesive of the lithium ion battery. According to the invention, by means of controlling the particle size distribution range of the lithium iron phosphate, the lithium titanate and the aluminium oxide, a ball milling effect is produced in a stirring and dispersing process, so that the dispersion uniformity of the carbon nanotubes is increased effectively. Particularly, by adoption of the internal circuit system for cyclic stirring and dispersing, circulation dead angles can be prevented in the stirring tank, and the dispersion effect of the carbon nanotubes can be increased further. The process disclosed by the invention has the advantages of simpleness, convenience for operate, dispersion uniformity of the carbon nanotubes in a slurry preparation process of the lithium ion battery, long-term stability of the viscosity of the slurry and good reproducibility, and is suitable for industrial application.
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Description

Technical field:

[0001] The invention discloses a dispersion process of carbon nanotubes in lithium-ion battery conductive glue. The invention belongs to the technical field of lithium ion battery preparation. Background technique:

[0002] Lithium-ion batteries have the advantages of high specific energy and no memory effect. In recent years, they have been favored by people as a new energy source, and thus develop rapidly. With the maturity of technology, people's requirements for lithium-ion batteries are also getting higher and higher. With the advancement of research, the emergence of CNT (carbon nanotubes) as a conductive agent has brought great development potential to improve the overall performance of lithium-ion batteries. In the process of making lithium-ion batteries, the slurry production is a very important link, but the existing technology has defects in the dispersion of CNT (carbon nanotubes) in the slurry, which limits the superiority of CNT (carbon nanotu...

Claims

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