Conductive material dispersion, electrode, and secondary battery comprising electrode

The use of carbon nanocables stabilized by dispersants in secondary batteries addresses dispersibility and re-aggregation issues, improving electrical conductivity and resistance while maintaining a stable conductive network.

WO2026127705A1 Publication Date: 2026-06-18LG ENERGY SOLUTION LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
LG ENERGY SOLUTION LTD
Filing Date
2025-12-12
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Conventional conductive materials in secondary batteries, such as carbon nanotubes and graphene, face issues with dispersibility, surface reactions, and restricted electrolyte mobility, leading to poor electrical conductivity and uneven distribution within the electrode composite layer.

⚗Method used

A conductive dispersion containing carbon nanocables, stabilized by an amine-based and polyphenol-based dispersant, is used to improve dispersibility and maintain a conductive network, even with damage during the dispersion process, by suppressing re-aggregation and controlling viscosity.

🎯Benefits of technology

The solution enhances electrical conductivity, resistance, and lifespan of secondary batteries by forming a uniform conductive network within the electrode, minimizing defects and maintaining a stable conductive path.

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Abstract

Disclosed in the present specification are a conductive material dispersion and an electrode using the dispersion, wherein the conductive material dispersion comprises carbon nanocables, an amine-based dispersant, and a polyphenol-based dispersant, the carbon nanocables have an average diameter of 1 ㎛ or less and are obtained by arranging and bonding a plurality of carbon nanotube units, including single-walled carbon nanotubes and double-walled carbon nanotubes, in the longitudinal direction and the radial direction, and the carbon nanotube units have an average diameter of 1.8 nm to 4.0 nm and a standard deviation of diameter of 0.30 or more. In addition, a secondary battery having improved resistance characteristics and lifespan characteristics due to the use of carbon nanocables having a high packing density, excellent durability, and a long length as a conductive material may be provided.
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