Solid electrolyte, all solid state battery, method for producing solid electrolyte, and method for producing all solid state battery

Patent metadata

Field	Value
Publication number	US-10601073-B2
Application number	US-201816121835-A
Country	US
Kind code	B2
Filing date	Sep 5, 2018
Priority date	Mar 8, 2016
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

A solid electrolyte having a NaSICON-type crystal structure and represented by a general formula Li1+aZr2−bMc(PO4)3. In the general formula, Li may be partially substituted with at least one selected from the group consisting of Na, K, Rb, Cs, Ag, and Ca, P may be partially substituted with at least one of B and Si, M contains at least one first element capable of stabilizing or partially stabilizing the tetragonal or cubic crystal structure of a high-temperature phase of ZrO2, −0.50≤a≤2.00, 0.01≤b≤1.90, and 0.01≤c≤1.90.

First claim

The invention claimed is:

1. A solid electrolyte having a NaSICON-type crystal structure, the solid electrolyte represented by:
Li 1+a Zr 2−b M1 c1 M2 c2 (PO 4 ) 3
wherein M1 is at least one element capable of stabilizing or partially stabilizing a tetragonal or cubic crystal structure of a high-temperature phase of ZrO 2 ,
M2 is at least one element selected from the group of Al, Ga, Sc, In, Ge, Ti, Ru, Sn, Hf, Ce, V, Nb, Ta, Bi, and W,
−0.50≤a≤2.00,
0.01≤b≤1.90,
0.01≤c1≤0.90, and
0.01≤c2≤1.89.

2. The solid electrolyte according to claim 1 , wherein Li is partially substituted with at least one selected from the group of Na, K, Rb, Cs, Ag, and Ca.

3. The solid electrolyte according to claim 2 , wherein P is partially substituted at least one of B and Si.

4. The solid electrolyte according to claim 1 , wherein P is partially substituted at least one of B and Si.

5. An all solid state electrolyte battery comprising:
a solid electrolyte layer comprising the solid electrolyte according to claim 1 ;
a positive electrode joined to a first surface of the solid electrolyte layer; and
a negative electrode joined to a second surface of the solid electrolyte layer.

Assignees

• Murata Manufacturing Co

Inventors

• Yoshioka Makoto
• Ito Akisuke
• TAKANO Ryohei
• Ishikura Takeo

Classifications

• H01M4/382

  Lithium (H01M4/405 takes precedence) · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title

• H01B1/08

  oxides · CPC title

• H01M2300/0074

  Ion conductive at high temperature · CPC title

• H01M10/0585

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