An organic carbon nanotube conductive paste and its preparation method

CN120280205BActive Publication Date: 2026-05-26SANRUI NEW MATERIALS (ZIBO) CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SANRUI NEW MATERIALS (ZIBO) CO LTD
Filing Date
2025-04-03
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing carbon nanotube conductive pastes have difficulty in achieving a balance between dispersibility, stability, and conductivity. The use of dispersants can hinder electron transport and increase the internal resistance of the battery, thus affecting battery performance.

Method used

A binary organic solvent system, including DMF and butylcarbitol, is used to achieve efficient deagglomeration and uniform dispersion of carbon nanotubes through π-π interactions and steric hindrance effects, avoiding the use of dispersants and simplifying the process.

Benefits of technology

It improves the dispersibility and stability of carbon nanotube conductive slurry, reduces resistivity, increases battery energy density and fast charging efficiency, simplifies the production process, and reduces cost and environmental impact.

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Abstract

This invention relates to the field of conductive paste preparation technology, providing an organic carbon nanotube conductive paste and its preparation method. The paste uses a binary organic solvent system composed of butylcarbitol and DMF, achieving efficient deagglomeration and uniform dispersion of carbon nanotubes without the need for dispersants. The preparation method includes: premixing DMF and butylcarbitol, adding carbon nanotube powder for further premixing, and finally obtaining the conductive paste through sand milling. This method ensures uniform dispersion and high stability of the paste by precisely controlling the solvent ratio, premixing parameters, and sand milling conditions. This invention overcomes the technical bottleneck of traditional dispersants limiting conductivity, simplifies the process, reduces production costs, and simultaneously improves battery energy density and fast-charging efficiency.
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