All solid battery

Patent metadata

Field	Value
Publication number	US-11056716-B2
Application number	US-201816177204-A
Country	US
Kind code	B2
Filing date	Oct 31, 2018
Priority date	Nov 2, 2017
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

An all solid battery includes: a solid electrolyte layer; a positive electrode layer provided on a first face of the solid electrolyte layer, a part of the positive electrode layer extending to a first edge portion of the solid electrolyte layer; a first margin layer that is provided on an area of the solid electrolyte layer where the positive electrode is not provided; a negative electrolyte layer provided on a second face of the solid electrolyte layer, a part of the negative electrolyte layer extending to a second edge portion of the solid electrolyte layer; a second margin layer that is provided on an area of the second face of the solid electrolyte layer where the negative electrolyte layer is not provided; wherein a main component of the first margin layer and the second margin layer is solid electrolyte of which ionic conductivity is lower than that of the solid electrolyte layer.

First claim

What is claimed is:

1. An all solid battery comprising:
a solid electrolyte layer;
a positive electrode layer provided on a first face of the solid electrolyte layer;
a negative electrolyte layer provided on a second face of the solid electrolyte layer;
a first cover layer that is stacked as a first outermost layer in a multilayer structure in a stacking direction, the multilayer structure including the solid electrolyte layer, the positive electrode layer and the negative electrode layer; and
a second cover layer that is stacked as a second outermost layer that is opposite to the first outermost layer, in the multilayer structure,
wherein a main component of the first cover layer and the second cover layer is solid electrolyte of which ionic conductivity is lower than that of the solid electrolyte layer.

2. The all solid battery as claimed in claim 1 , wherein a main component of the solid electrolyte layer is solid electrolyte having a NASICON type crystal structure.

3. The all solid battery as claimed in claim 1 , wherein total ionic conductivity of the first cover layer and the second cover layer is lower than total ionic conductivity of the solid electrolyte layer by two digits or more at a same temperature.

4. The all solid battery as claimed in claim 1 , wherein a main component of the first cover layer and the second cover layer is solid electrolyte of which a ratio of Zr is larger than a ratio of Zr of a main component of the solid electrolyte layer, the main component of the solid electrolyte layer being solid electrolyte.

Assignees

• Taiyo Yuden Kk

Inventors

• Ito Daigo
• Satoh Takato
• Tomizawa Sachie
• Kawamura Chie

Classifications

• H01M50/15

  for prismatic or rectangular cells (H01M50/153 takes precedence) · CPC title

• Y02P70/50

  Manufacturing or production processes characterised by the final manufactured product · CPC title

• H01M2300/0077

  based on zirconium oxide · CPC title

• H01M10/0585

  of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators · CPC title

• H01M2300/0068

  inorganic · CPC title