Phase-transition solid electrolyte material and all solid secondary battery including the same

Patent metadata

Field	Value
Publication number	US-11984552-B2
Application number	US-201916683457-A
Country	US
Kind code	B2
Filing date	Nov 14, 2019
Priority date	Nov 16, 2018
Publication date	May 14, 2024
Grant date	May 14, 2024

Abstract

An all-solid secondary battery includes: a cathode layer including a cathode active material; an anode layer; and a solid electrolyte layer disposed between the cathode layer and the anode layer, wherein at least one of the cathode layer, the anode layer, or the solid electrolyte layer includes a phase-transition solid electrolyte material, wherein upon heating, the phase-transition solid electrolyte material undergoes a phase transition from a first phase to a second phase, and the second phase has an ionic conductivity less than the ionic conductivity of the first phase.

First claim

What is claimed is:

1. A phase-transition solid electrolyte material comprising: a sulfide material represented by Formula (4)
d ( e LiBr-(1- e )LiCl)-(1- d )Li 3 PS 4   (4)

wherein, in Formula (4)
0.1≤d≤0.7, and
0≤e≤1;

the phase-transition solid electrolyte material further comprising at least one sulfide material represented by Formula (1), wherein the at least one sulfide material represented by Formula (1) is distinct from the sulfide material represented by Formula (4):
b LiX-(1- b )( c Li 2 S-(1- c )P 2 S 5 )  (1)

wherein, in Formula (1),
0.1≤b≤0.7,
0.6≤c≤0.9,
and X is at least one of Cl, Br, or I.

2. The phase-transition solid electrolyte material of claim 1 , wherein,
in Formula (1),
0.2≤b≤0.67, and
0.7≤c≤0.8.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Ito Seitaro
• Tsujimura Tomoyuki
• Aihara Yuichi

Classifications

• H01M10/0562 Primary

  Solid materials · CPC title

• C01G53/42

  containing alkali metals, e.g. LiNiO2 · CPC title

• C01G53/50

  of the type (MnO2)n-, e.g. Li(NixMn1-x)O2 or Li(MyNixMn1-x-y)O2 · CPC title

• H01M4/382

  Lithium (H01M4/405 takes precedence) · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title