Invention Grant
- Patent Title: Material for negative electrode of non-aqueous electrolyte secondary battery, process for producing the same, negative electrode and battery
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Application No.: US10583762Application Date: 2005-03-25
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Publication No.: US08574533B2Publication Date: 2013-11-05
- Inventor: Naohiro Sonobe , Hiroshi Ohta , Takahiro Akita
- Applicant: Naohiro Sonobe , Hiroshi Ohta , Takahiro Akita
- Applicant Address: JP Tokyo
- Assignee: Kureha Corporation
- Current Assignee: Kureha Corporation
- Current Assignee Address: JP Tokyo
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2004-100749 20040330
- International Application: PCT/JP2005/005580 WO 20050325
- International Announcement: WO2005/098998 WO 20051020
- Main IPC: D01F9/12
- IPC: D01F9/12 ; D01F9/16 ; C01B31/00 ; C01B31/04 ; C01D3/00 ; C09C1/56 ; H01M4/13 ; H01M4/60 ; H01M6/00 ; H01B1/04

Abstract:
A negative electrode material for non-aqueous electrolyte secondary batteries, comprises: a carbon material having a sphericity of at least 0.8, and exhibiting an average (002) interlayer spacing d002 of 0.365-0.400 nm, a crystallite size in a c-axis direction Lc(002) of 1.0-3.0 nm, as measured by X-ray diffractometry, a hydrogen-to-carbon atomic ratio (H/C) of at most 0.1 as measured by elementary analysis, and an average particle size Dv50 of 1-20 μm. The negative electrode material is spherical and exhibits excellent performances including high output performance and durability.
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