Invention Grant
- Patent Title: Negative electrode material for secondary battery, and secondary battery
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Application No.: US14389514Application Date: 2013-03-06
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Publication No.: US09748556B2Publication Date: 2017-08-29
- Inventor: Akio Toda , Kimiyoshi Fukatsu , Ryota Yuge , Shinji Fujieda
- Applicant: Akio Toda , Kimiyoshi Fukatsu , Ryota Yuge , Shinji Fujieda
- Applicant Address: JP Tokyo
- Assignee: NEC Corporation
- Current Assignee: NEC Corporation
- Current Assignee Address: JP Tokyo
- Agency: Wilmer Cutler Pickering Hale and Dorr LLP
- Priority: JP2012-082756 20120330
- International Application: PCT/JP2013/056130 WO 20130306
- International Announcement: WO2013/146144 WO 20131003
- Main IPC: H01M4/133
- IPC: H01M4/133 ; C01B31/04 ; H01M4/36 ; H01M4/587 ; H01M10/0525 ; H01M4/02

Abstract:
The present invention relates to a negative electrode material for secondary batteries, comprising graphite; wherein the graphite comprises hexagonal crystal graphite and rhombohedral crystal graphite, and has a low-crystalline carbon coating on a surface thereof; and the graphite has exothermic peaks in the range of 600° C. or lower and in the range of 690° C. or higher in DTA measurement, or the graphite has a full width at half maximum of a (101) peak of the hexagonal crystal graphite of 0.2575° or less in XRD measurement, or the graphite has an absolute value of the difference between the lattice strain obtained from (101) plane spacing of the hexagonal crystal graphite and the lattice strain obtained from (100) plane spacing of the hexagonal crystal graphite of 7.1×10−4 or less in XRD measurement.
Public/Granted literature
- US20150118566A1 NEGATIVE ELECTRODE MATERIAL FOR SECONDARY BATTERY, AND SECONDARY BATTERY Public/Granted day:2015-04-30
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