SOLID ELECTROLYTE MATERIAL AND LITHIUM BATTERY

• US 20130084505A1
• Filed: 07/06/2011
• Published: 04/04/2013
• Est. Priority Date: 07/07/2010
• Status: Active Grant

• Current Assignee: National University Corporation Shizuoka University, Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Iriyama, Yasutoshi, Kumazaki, Shota, Ramaswamy, Murugan, Hirose, Yutaka
• Granted Patent: US 8,865,355 B2
• Time in Patent Office: Days
• US Class Current: 429/319
• 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 2235/3227 Lanthanum oxide or oxide-forming salts thereof
• CPC Class Codes: C04B 2235/3418 Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
• CPC Class Codes: C04B 2235/604 Pressing at temperatures other than sintering temperatures
• CPC Class Codes: C04B 2235/6562 Heating rate
• CPC Class Codes: C04B 2235/6565 Cooling rate
• CPC Class Codes: C04B 2235/6567 Treatment time
• CPC Class Codes: C04B 2235/764 Garnet structure A3B2(CO4)3
• CPC Class Codes: C04B 35/486 Fine ceramics
• CPC Class Codes: C04B 35/6262 of calcined, sintered clinker or ceramics
• CPC Class Codes: C04B 35/62645 Thermal treatment of powders or mixtures thereof other than sintering
• CPC Class Codes: H01B 1/122 Ionic conductors
• CPC Class Codes: H01M 10/052 Li-accumulators
• CPC Class Codes: H01M 10/054 Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium
• CPC Class Codes: H01M 10/056 characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 2300/0071 Oxides
• CPC Class Codes: H01M 6/185 with oxides, hydroxides or oxysalts as solid electrolytes
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A main object of the present invention is to provide a Li—La—Zr—O-based solid electrolyte material having favorable denseness. The present invention solves the problem by providing a solid electrolyte material including Li, La, Zr, Al, Si and O, having a garnet structure, and being a sintered body.

Claims

1. A solid electrolyte material comprising Li, La, Zr, Al, Si and O, having a garnet structure, and being a sintered body.

2. The solid electrolyte material according to claim 1, wherein a ratio of the Li, the La and the Zr is Li:

La;

Zr=7;

3;

2 on a molar basis.

3. The solid electrolyte material according to claim 1, wherein Li ion conductance is 2.0×

10<sup>−

4</sup> S/cm or more.

4. The solid electrolyte material according to claim 1, wherein a ratio (Al/Si) of a content (% by weight) of the Al to a content (% by weight) of the Si is within a range of 4.6 to 11.9.

5. A lithium battery comprising a cathode active material layer containing a cathode active material, an anode active material layer containing an anode active material, and a solid electrolyte layer formed between the cathode active material layer and the anode active material layer;

wherein the solid electrolyte layer contains the solid electrolyte material according to claim 1.