All-solid-state lithium ion secondary battery

Patent metadata

Field	Value
Publication number	US-11387485-B2
Application number	US-201816605432-A
Country	US
Kind code	B2
Filing date	Apr 13, 2018
Priority date	Apr 18, 2017
Publication date	Jul 12, 2022
Grant date	Jul 12, 2022

Abstract

Disclosed is an all-solid-state lithium ion secondary battery being excellent in cycle characteristics. The all-solid-state lithium ion secondary battery may be an all-solid-state lithium ion secondary battery, wherein an anode comprises an anode active material, an electroconductive material and a solid electrolyte; wherein the anode active material comprises at least one active material selected from the group consisting of a metal that is able to form an alloy with Li, an oxide of the metal, and an alloy of the metal and Li; and wherein a bulk density of the solid electrolyte is 0.3 g/cm3 or more and 0.6 g/cm3 or less.

First claim

The invention claimed is:

1. An all-solid-state lithium ion secondary battery,
wherein an anode comprises an anode active material, an electroconductive material and a solid electrolyte;
wherein the anode active material comprises at least one active material selected from the group consisting of a metal that is able to form an alloy with Li, an oxide of the metal, and an alloy of the metal and Li;
wherein the solid electrolyte is a LiX—Li 2 S—P 2 S 5 -based solid electrolyte, where X is at least one halogen selected from the group consisting of F, Cl, Br and I; and
wherein a bulk density of the solid electrolyte is 0.40 g/cm 3 or more and 0.48 g/cm 3 or less.

2. The all-solid-state lithium ion secondary battery according to claim 1 , wherein the anode active material comprises at least one active material selected from the group consisting of elemental silicon and an alloy of Si and Li.

3. The all-solid-state lithium ion secondary battery according to claim 1 , wherein the electroconductive material is at least one carbonaceous material selected from the group consisting of carbon black, carbon nanotube and carbon nanofiber.

Assignees

• Toyota Motor Co Ltd

Inventors

• Ose Norihiro
• Hasegawa Hajime
• Otaki Mitsutoshi
• Kintsu Yusuke

Classifications

• H01M4/386

  Silicon or alloys based on silicon · CPC title

• H01M10/0525 Primary

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

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M4/134

  Electrodes based on metals, Si or alloys · CPC title