All solid state battery

Patent metadata

Field	Value
Publication number	US-2016248093-A1
Application number	US-201615010462-A
Country	US
Kind code	A1
Filing date	Jan 29, 2016
Priority date	Feb 25, 2015
Publication date	Aug 25, 2016
Grant date	—

Abstract

The main object of the present invention is to provide an all solid state battery in which compatibility between battery performance and safety is intended. The present invention attains the object by providing an all solid state battery comprising a cathode layer containing a cathode active material, an anode layer containing an anode active material, and a solid electrolyte layer formed between the cathode layer and the anode layer, containing a first sulfide solid electrolyte material, characterized in that a ratio of ion resistance of the whole all solid state battery to ion resistance of the solid electrolyte layer is 3.8 or less, and the ion resistance of the solid electrolyte layer is 7.6 Ω·cm 2 or more and 16 Ω·cm 2 or less.

First claim

What is claimed is:

1 . An all solid state battery comprising a cathode layer containing a cathode active material, an anode layer containing an anode active material, and a solid electrolyte layer formed between the cathode layer and the anode layer, containing a first sulfide solid electrolyte material;
wherein a ratio of ion resistance of the whole all solid state battery to ion resistance of the solid electrolyte layer is 3.8 or less, and the ion resistance of the solid electrolyte layer is 7.6 Ω·cm 2 or more and 16 Ω·cm 2 or less.

2 . The all solid state battery according to claim 1 , wherein at least one of the cathode layer and the anode layer further contains a second sulfide solid electrolyte material.

3 . The all solid state battery according to claim 2 , wherein the first sulfide solid electrolyte material and the second sulfide solid electrolyte material are different materials.

4 . The all solid state battery according to claim 2 , wherein an ion conductance of the second sulfide solid electrolyte material is larger than an ion conductance of the first sulfide solid electrolyte material.

Assignees

• Toyota Motor Co Ltd

Inventors

• Sugiura Koichi
• Yoshida Satoshi
• Fujimaki Hisataka
• Matsushita Yuki

Classifications

• H01M4/136

  Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/5815 Primary

  Sulfides · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title