Positivelektrode und Lithiumsekundärbatterie damit

Details

Veröffentlichungs-Nr.

EP4749704

Anmeldetag

27. September 2024

Veröffentlichung

3. April 2025

Rechtsraum

EP

Abstract

The present invention relates to a positive electrode having a positive electrode composite layer, including a positive electrode active material, carbon nanotubes, and carbon black, disposed on a current collector, wherein a ratio (BET<CB>)/(BET<CNT>) of a BET surface area BET<CB> of the carbon black to a BET surface area BET<CNT> of the carbon nanotubes is greater than 1.0 and 3.4 or less, and the carbon nanotubes have a number cumulative average particle size D<50>CNT of 0.9 µm to 2.0 um, and a positional relationship between the carbon nanotubes and the carbon black within the positive electrode and connectivity with active material particles are excellent, and thus both ionic conductivity and electrical conductivity are improved, thereby providing a lithium secondary battery offering superior resistance, improved lifespan, and price competitiveness.

Anmelder

Firma

LG Energy Solution, Ltd.

Land

🇰🇷 Südkorea