Sulfide solid electrolyte material, battery, and producing method for sulfide solid electrolyte material

Patent metadata

Field	Value
Publication number	US-2016149258-A1
Application number	US-201414896281-A
Country	US
Kind code	A1
Filing date	May 29, 2014
Priority date	Jun 7, 2013
Publication date	May 26, 2016
Grant date	—

Abstract

The present invention aims to provide a sulfide solid electrolyte material with favorable ion conductivity, in which charge and discharge efficiency may be inhibited from decreasing. The object is attained by providing a sulfide solid electrolyte material, including: a Li element; a P element; and a S element, characterized in that the material has a peak at a position of 2θ=30.21°±0.50° in X-ray diffraction measurement using a CuKα ray, and the sulfide solid electrolyte material does not substantially include a metallic element belonging to the third group to the sixteenth group.

First claim

1 - 9 . (canceled)

10 . A sulfide solid electrolyte material, comprising: a Li element; a P element; and a S element, characterized in that
the sulfide solid electrolyte material has a peak at a position of 2θ=17.69°±0.50°, 20.60°±0.50°, 24.60°±0.50°, 27.62°±0.50° and 30.21°±0.50° in X-ray diffraction measurement using a CuKα ray, the sulfide solid electrolyte material does not substantially comprise a metallic element belonging to a third group to a sixteenth group, and the sulfide solid electrolyte material comprises a composition of Li 5x+2y+3 P 1−x S 4 (0≦x≦0.2, 0<y≦0.3) or a composition of Li 5x±3 P 1−x S 4 (0.1≦x≦0.2).

11 . A sulfide solid electrolyte material comprising: an octahedron O composed of a Li element and a S element; a tetrahedron T 1 composed of a P element and a S element; and a tetrahedron T 2 composed of a P element and a S element,
characterized in that the tetrahedron T 1 and the octahedron O share an edge, and the tetrahedron T 2 and the octahedron O contain a crystal structure sharing a corner, the sulfide solid electrolyte material does not substantially comprise a metallic element belonging to a third group to a sixteenth group, and the sulfide solid electrolyte material comprises a composition of Li 5x+2y+3 P 1−x S 4 (0≦x≦0.2, 0<y≦0.3) or a composition of Li 5x+3 P 1−x S 4 (0.1≦x≦0.2).

12 . A battery comprising a cathode active material layer containing a cathode active material, an anode active material layer containing an anode active material, and an electrolyte layer formed between the cathode active material layer and the anode active material layer,
characterized in that at least one of the cathode active material layer, the anode active material layer and the electrolyte layer contains the sulfide solid electrolyte material according to claim 10 .

13 . A battery comprising a cathode active material layer containing a cathode active material, an anode active material layer containing an anode active material, and an electrolyte layer formed between the cathode active material layer and the anode active material layer,
characterized in that at least one of the cathode active material layer, the anode active material layer and the electrolyte layer contains the sulfide solid electrolyte material according to claim 11 .

14 . A producing method for a sulfide solid electrolyte material, the sulfide solid electrolyte material being the sulfide solid electrolyte material according to claim 10 , comprising steps of:
an ion conductive material synthesizing step of synthesizing an amorphized ion conductive material by melt extraction while using a raw material composition containing a constituent of the sulfide solid electrolyte material; and a heating step of obtaining the sulfide solid electrolyte material by heating the amorphized ion conductive material.

15 . A producing method for a sulfide solid electrolyte material, the sulfide solid electrolyte material being the sulfide solid electrolyte material according to claim 11 , comprising steps of:
an ion conductive material synthesizing step of synthesizing an amorphized ion conductive material by melt extraction while using a raw material composition containing a constituent of the sulfide solid electrolyte material; and a heating step of obtaining the sulfide solid electrolyte material by heating the amorphized ion conductive material.

Assignees

• Tokyo Inst Tech
• Toyota Motor Co Ltd

Inventors

• Kanno Ryoji
• Hirayama Masaaki
• Kato Yuki
• Ohtomo Takamasa
• Yamasaki Hisatsugu

Classifications

• H01M10/0525

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

• H01M10/0562 Primary

  Solid materials · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M2300/0068

  inorganic · CPC title

• Y02E60/10

  Energy storage using batteries · CPC title