Invention Grant
- Patent Title: Electrode material for lithium secondary battery and lithium secondary battery
- Patent Title (中): 锂二次电池和锂二次电池用电极材料
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Application No.: US13574996Application Date: 2011-07-07
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Publication No.: US09413003B2Publication Date: 2016-08-09
- Inventor: Takehiko Sawai , Shinji Saito , Kazunori Urao , Takashi Kawasaki
- Applicant: Takehiko Sawai , Shinji Saito , Kazunori Urao , Takashi Kawasaki
- Applicant Address: JP Mie JP Tokyo
- Assignee: SEI CORPORATION,DENKA COMPANY LIMITED
- Current Assignee: SEI CORPORATION,DENKA COMPANY LIMITED
- Current Assignee Address: JP Mie JP Tokyo
- Agency: Hedman & Costigan, P.C.
- Agent James V. Costigan; Kathleen A. Costigan
- Priority: JP2011-089544 20110413
- International Application: PCT/JP2011/065590 WO 20110707
- International Announcement: WO2012/140790 WO 20121018
- Main IPC: H01M4/583
- IPC: H01M4/583 ; H01M4/00 ; H01M4/48 ; H01M4/13 ; H01M4/58 ; H01M4/62 ; H01M4/587 ; H01M4/36 ; H01M4/38 ; H01M4/1393 ; H01M4/131 ; H01M4/1391 ; H01M4/139 ; H01M4/1395 ; H01M4/133 ; H01M4/134 ; H01M10/052

Abstract:
The present invention provides a negative-electrode material for a lithium secondary battery which has a very low resistance, allows the lithium secondary battery to be charged and discharged (high output) at a high current and have a high capacity, and achieve a cycle life to such an extent that the lithium secondary battery can be mounted on a vehicle. The electrode material is composed of (a) at least one active substance (4) selected from among a metal oxide containing metal therein and an alloy material each of which is coated with a carbon material and has a graphene phase or an amorphous phase (8) on at least a surface thereof, (b) a graphite-based carbon material (5) having the graphene phase or the amorphous phase on at least a surface thereof; and (c) carbon material (6) other than the graphite-based carbon material and having the graphene phase or the amorphous phase on at least a surface thereof. The active substance (4), the graphite-based carbon material (5), and the carbon material (6) other than the graphite-based carbon material fuse the graphene phase or the amorphous phase (8a, 8b) thereof together and bond them to each other to form a composite active substance (7) including composed of the active substance including one active substance selected from among the metal oxide containing the metal and the alloy material.
Public/Granted literature
- US20120328923A1 ELECTRODE MATERIAL FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY Public/Granted day:2012-12-27
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