High-conductivity carbon nanotube dispersion liquid, preparation method and quality control method thereof

• Main Authors: SHI YINHUAN, CAI KAIXIN, LI WEI, ZHU YE, DONG ZEQING, XU HUAILIANG, HE YUE
• Format: Patent
• Language: Chinese; English
• Published: 05.07.2024
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMISTRY; COMPOUNDS THEREOF; ELECTRICITY; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

The invention provides a carbon nanotube dispersion liquid. The carbon nano tube dispersion liquid contains 0.1%-1.5% of carbon nano tubes, and the average tube diameter of the carbon nano tubes is 1-7 nm; and meanwhile, the number of the metal particles is required as follows: no more than 15 particles with the particle size of more than 100 microns are contained in every 400g of the carbon nanotube dispersion liquid, no more than 50 particles with the particle size of 50-100 microns are contained in the carbon nanotube dispersion liquid, and no more than 100 particles with the particle size of less than 50 microns are contained in the carbon nanotube dispersion liquid. The viscosity of the dispersion liquid is 10-4000 mPa.s when the viscosity of the dispersion liquid is 10 s <-1 > through testing of a rheometer; the particle size distribution D50 is 10-60 [mu] m through a laser particle analyzer. The carbon nanotube dispersion liquid not only can reduce the resistivity of an electrode plate and the self-dis