Invention Grant
- Patent Title: Graphite material with lattice distortion for use in lithium-ion secondary battery negative electrodes, and lithium-ion secondary battery
- Patent Title (中): 用于锂离子二次电池负极的晶格畸变的石墨材料和锂离子二次电池
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Application No.: US13858375Application Date: 2013-04-08
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Publication No.: US09214666B2Publication Date: 2015-12-15
- 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. , Setsumi Fujinaga
- Applicant Address: JP Tokyo JP Hiroshima
- Assignee: JX NIPPON OIL & ENERGY CORPORATION,TODA KYOGO CORP.
- Current Assignee: JX NIPPON OIL & ENERGY CORPORATION,TODA KYOGO CORP.
- Current Assignee Address: JP Tokyo JP Hiroshima
- Agency: Finnegan, Henderson, Farabow, Garrett & Dunner, L.L.P.
- Priority: JP2010-228988 20101008
- Main IPC: H01M4/13
- IPC: H01M4/13 ; H01M4/583 ; H01M4/133 ; C01B31/04 ; H01M4/1393 ; H01M4/587 ; H01M10/0525
Abstract:
This disclosure concerns graphite materials having lattice distortion for lithium-ion secondary battery negative electrode obtained by a manufacturing method comprising the steps of: pulverizing and classifying a raw coke composition obtained from a heavy-oil composition undergone coking by delayed coking process, the raw coke composition having a H/C atomic ratio that is a ratio of hydrogen atoms H and carbon atoms C of 0.30 to 0.50 and having a micro-strength of 7 to 17 mass % to obtain powder of the raw coke composition; giving compressive stress and shear stress to the powder of the raw coke composition so that average circularity is 0.91 to 0.97 to obtain round powder; heating the round powder to obtain a carbonized composition; and graphitizing the carbonized composition.
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