Lithium secondary battery anode member and method for manufacturing the same

• US 20060292449A1
• Filed: 06/28/2006
• Published: 12/28/2006
• Est. Priority Date: 06/28/2005
• Status: Active Grant

• Current Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Original Assignee: Sumitomo Electric Industries Limited (Sumitomo Corporation)
• Inventors: Ota, Nobuhiro
• Granted Patent: US 8,709,106 B2
• Time in Patent Office: Days
• US Class Current: 429/322
• CPC Class Codes: H01M 10/0562 Solid materials
• CPC Class Codes: H01M 10/058 Construction or manufacture
• CPC Class Codes: H01M 2300/0071 Oxides
• CPC Class Codes: H01M 4/134 Electrodes based on metals, Si or alloys
• CPC Class Codes: H01M 4/1395 of electrodes based on metals, Si or alloys
• CPC Class Codes: H01M 4/382 Lithium H01M4/405 takes precedence
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y10T 29/49115 including coating or impregnating

Abstract

A lithium secondary battery anode member of the present invention includes a solid electrolyte film formed on a lithium metal film and is capable of suppressing reduction of the solid electrolyte film over a long period of time. In the lithium secondary battery anode member, the lithium metal film and the solid electrolyte film are laminated on a substrate, the solid electrolyte film contains the composition xLi.yP.zS.wO wherein x, y, z, and w satisfy the relations, 0.2≦x≦0.45, 0.1≦y≦0.2, 0.35≦z≦0.6, and 0.03≦w≦0.13, respectively, (x+y+z+w=1), and the main peaks of an X-ray diffraction pattern of the solid electrolyte film measured by a film method using Cu Kα radiation are at 2θ of about 11° and 30° and each have a half width of 10° or less.

Claims

1. A lithium secondary battery anode member comprising:

a lithium metal film and a solid electrolyte film which are laminated on a substrate;

wherein the solid electrolyte film contains the composition xLi.yP.zS.wO wherein x, y, z, and w satisfy the relations, 0.2≦

x≦

0.45, 0.1≦

y≦

0.2, 0.35≦

z≦

0.6, and 0.03≦

w≦

0.13, respectively, (x+y+z+w=1); and

the main peaks of an X-ray diffraction pattern of the solid electrolyte film are at 2θ

of about 11° and

30° and

each have a half width of 10°

or less in a film method using Cu Kα

radiation.

2. The lithium secondary battery anode member according to claim 1, wherein the lithium metal film contains 1 atomic % to 10 atomic % of oxygen.

3. A method for producing a lithium secondary battery anode member including a laminate of a lithium metal film and a solid electrolyte film on a substrate, the method comprising:

depositing the lithium metal film on the substrate;

depositing the solid electrolyte film on the lithium metal film; and

heating the solid electrolyte film at 75°

C. to 170°

C. for 5 minutes to 50 hours in a dry inert atmosphere;

wherein the composition of the solid electrolyte film is xLi.yP.zS.wO wherein x, y, z, and w satisfy the relations, 0.2≦

x≦

0.45, 0.1≦

y≦

0.2, 0.35≦

z≦

0.6, and 0.03≦

w≦

0.13, respectively, (x+y+z+w=1).