SULFIDE SOLID ELECTROLYTE

• US 20150214572A1
• Filed: 02/18/2013
• Published: 07/30/2015
• Est. Priority Date: 09/11/2012
• Status: Abandoned Application

• Current Assignee: Tokyo Institute of Technology (National University Corporation Tokyo Institute of Technology), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Tokyo Institute of Technology (National University Corporation Tokyo Institute of Technology), Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Kato, Yuki, Otomo, Takamasa, Kanno, Ryoji, Hirayama, Masaaki
• Application Number:
  US14/425,249
• Publication Number:
  US 20150214572A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C04B 2235/3203 Lithium oxide or oxide-forming salts thereof
• CPC Class Codes: C04B 2235/3217 Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
• CPC Class Codes: C04B 2235/3287 Germanium oxides, germanates or oxide forming salts thereof, e.g. copper germanate
• CPC Class Codes: C04B 2235/3293 Tin oxides, stannates or oxide forming salts thereof, e.g. indium tin oxide [ITO]
• CPC Class Codes: C04B 2235/446 Sulfides, tellurides or selenides
• CPC Class Codes: C04B 35/547 based on sulfides or selenides or tellurides
• CPC Class Codes: C04B 35/62615 High energy or reactive ball milling
• CPC Class Codes: H01B 1/10 sulfides
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 2300/0068 inorganic
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02T 10/70 Energy storage systems for electromobility, e.g. batteries

Abstract

A main object of the present invention is to provide a sulfide solid electrolyte whose reduction decomposition potential can be decreased more than a conventional LGPS-based sulfide solid electrolyte. The present invention is a sulfide solid electrolyte comprising Li, Al, Ge, P, and S, wherein M0=M2/M1 is 0<M0<0.323 where M1 is a mole fraction of contained P, and M2 is a mole fraction of contained Al, and in a case where each of X1 and X2 is an element selected from the group consisting of P, Ge, and Al, a crystal structure thereof includes an octahedron O formed by Li and S, a tetrahedron T1 formed by S and X1, and a tetrahedron T2 formed by S and X2, wherein the octahedron O and the tetrahedron T2 share a ridge, and the octahedron O and the tetrahedron T2 share an apex.

Claims

1. A sulfide solid electrolyte comprising Li, Al, Ge, P, and S,

wherein

M0=M2/M1 is 0<

M0<

0.323 where M1 is a mole fraction of contained P, and M2 is a mole fraction of contained Al, and

in a case where each of X1 and X2 is an element selected from the group consisting of P, Ge, and Al, a crystal structure of the sulfide solid electrolyte comprises an octahedron O formed by Li and S, a tetrahedron T1 formed by S and X1, and a tetrahedron T2 formed by S and X2, wherein the octahedron O and the tetrahedron T1 share a ridge, and the octahedron O and the tetrahedron T2 share an apex.

2. A sulfide solid electrolyte comprising Li, Al, Sn, P, and S,

wherein

M0=M2/M1 is 0<

M0<

0.323 where M1 is a mole fraction of contained P, and M2 is a mole fraction of contained Al, and

in a case where each of Y1 and Y2 is an element selected from the group consisting of P, Sn, and Al, a crystal structure of the sulfide solid electrolyte comprises an octahedron O formed by Li and S, a tetrahedron T1 formed by S and Y1, and a tetrahedron T2 formed by S and Y2, wherein the octahedron O and the tetrahedron T1 share a ridge, and the octahedron O and the tetrahedron T2 share an apex.