Verfahren zur Herstellung einer Festkörper-Sulfid-Batterie

Details

Veröffentlichungs-Nr.

EP3496188

Aktenzeichen

EP18201910

Anmeldetag

23. Oktober 2018

Veröffentlichung

31. März 2021

Erteilung

31. März 2021

Rechtsraum

EP

IPC

H01M4/133H01M4/134H01M4/1393H01M4/1395H01M4/36H01M4/38H01M4/485H01M4/583H01M10/052H01M10/0562H01M10/058// H01M4/02

Abstract

When an anode mixture containing a silicon-based active material and a sulfide solid electrolyte is layered over a surface of an anode current collector containing copper to form an anode, the sulfide solid electrolyte reacts with copper at the OCV of the silicon-based active material, and copper diffuses from the anode current collector via the sulfide solid electrolyte toward a cathode side, to cause minor short circuits of a cathode and the anode. When the anode mixture is made, lithium is diffused into the silicon-based active material, to lower potential. Specifically, a sulfide solid-state battery is produced via a first step of doping at least one material selected from graphite and lithium titanate with lithium, to obtain a predoped material; a second step of mixing the sulfide solid electrolyte, the silicon-based active material, and the predoped material, to obtain the anode mixture; and a third step of layering the anode mixture over the surface of the anode current collector that contains copper, to obtain the anode.

Anmelder

Firma

TOYOTA JIDOSHA KABUSHIKI KAISHA

Land

🇯🇵 Japan

Fachgebiete