Festkörperbatterie und Verfahren zur Herstellung davon

Details

Veröffentlichungs-Nr.

EP4742357

Anmeldetag

10. Februar 2025

Veröffentlichung

28. August 2025

Rechtsraum

EP

Abstract

The present disclosure relates to an all-solid-state battery and can provide an all-solid-state battery comprising a cathode, a solid electrolyte layer, an anodeless coating layer, and an anode current collector, and a manufacturing method therefor, wherein the anodeless coating layer includes amorphous carbon and silver nanoparticles, and when the anode-free coating layer is divided in the thickness direction into two equal parts, referred to as a first region and a second region in order from the side closer to the anode current collector, the ratio (C2/C1) of the silver nanoparticle content (C2) in the second region to the silver nanoparticle content (C1) in the first region falls within the range of 0.4 to 2 after charging/discharging. This configuration ensures excellent reactivity between silver nanoparticles and lithium ions, and high lithium ion conductivity. Even after charge and discharge cycles, the distribution characteristics of silver nanoparticles remain excellent, contributing to the uniformity of internal resistance in the battery and effectively regulating lithium dendrite growth. Accordingly, the all-solid-state battery of the present invention has an excellent capacity retention rate, particularly, an excellent capacity retention rate at a high rate, and also exhibits excellent lifespan characteristics.

Anmelder

Firma

LG Energy Solution, Ltd.

Land

🇰🇷 Südkorea