Invention Grant
US09142832B2 Graphite material for negative electrodes of lithium ion secondary battery, manufacturing method for said material, and lithium ion secondary battery using same
有权
锂离子二次电池用负极用石墨材料，所述材料的制造方法以及使用该锂离子二次电池的锂离子二次电池
- Patent Title: Graphite material for negative electrodes of lithium ion secondary battery, manufacturing method for said material, and lithium ion secondary battery using same
- Patent Title (中): 锂离子二次电池用负极用石墨材料，所述材料的制造方法以及使用该锂离子二次电池的锂离子二次电池
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Application No.: US13866843Application Date: 2013-04-19
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Publication No.: US09142832B2Publication Date: 2015-09-22
- Inventor: Takashi Suzuki , Noriyo Ishimaru , Takashi Oyama , Tamotsu Tano , Toshiyuki Oda , Ippei Fujinaga , Tomoaki Urai , Seiji Okazaki , Katsuaki Kurata , Toshiaki Hiramoto , Akino Sato , Wataru Oda
- Applicant: JX NIPPON OIL & ENERGY CORPORATION , TODA KOGYO CORP.
- Applicant Address: JP Tokyo JP Hiroshima
- Assignee: JX NIPPON OIL & ENERGY CORPORATION,TODA KOGYO CORP.
- Current Assignee: JX NIPPON OIL & ENERGY CORPORATION,TODA KOGYO CORP.
- Current Assignee Address: JP Tokyo JP Hiroshima
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
- Priority: JP2010-180485 20100811; JP2010-236475 20101021; JP2010-275161 20101209; JP2010-275162 20101209
- Main IPC: H01M4/133
- IPC: H01M4/133 ; C01B31/04 ; H01M4/587
Abstract:
A graphite material for a negative electrode is provided which can suppress capacity degradation due to repeated charging and discharging cycles, storage in a charged state, and floating charging.A method of manufacturing a graphite material for a negative electrode of a lithium ion secondary battery is provided in which an atomic ratio H/C of hydrogen atoms H and carbon atoms C in the raw coke composition is in a range of 0.30 to 0.50 and a microstrength of the raw coke composition is in a range of 7 wt % to 17 wt %.
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