Verfahren zur Herstellung von Porösen Siliciumelektrodenaktivmaterialteilchen, Poröse Siliciumelektrodenaktivmaterialteilchen, Elektrodenmischung und Batterie

Details

Veröffentlichungs-Nr.

EP4806842

Anmeldetag

22. Januar 2026

Veröffentlichung

16. September 2026

Rechtsraum

EP

IPC

C01B33/023

Abstract

The present disclosure provides a method for producing porous silicon electrode active material particles in which expansion and contraction are suppressed and the initial charge-discharge efficiency of a battery can be improved, porous silicon electrode active material particles, an electrode mixture including such porous silicon electrode active material particles, and a battery including such an electrode mixture. The method of the present disclosure for producing porous silicon electrode active material particles includes: (a) reducing porous silica particles with magnesium to obtain precursor particles containing silicon and magnesium oxide; and (b) removing the magnesium oxide from the precursor particles. In the porous silicon electrode active material particles of the present disclosure, the oxygen concentration is 6.5 mass% or less, the ratio of the oxygen concentration, expressed in mass%, to the specific surface area expressed, in m²/g, is 0.050 or less, and the pore volume is 0.9 cc/g or more.

Anmelder

Firma

Toyota Jidosha Kabushiki Kaisha

Land

🇯🇵 Japan

Fachgebiete