The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 22, 2015
Filed:
Apr. 19, 2013
Jx Nippon Oil & Energy Corporation, Tokyo, JP;
Toda Kogyo Corp., Hiroshima, JP;
Takashi Suzuki, Yokohama, JP;
Noriyo Ishimaru, Yokohama, JP;
Takashi Oyama, Yamaguchi, JP;
Tamotsu Tano, Yamaguchi, JP;
Toshiyuki Oda, Yamaguchi, JP;
Ippei Fujinaga, Yamaguchi, JP;
Tomoaki Urai, Otake, JP;
Seiji Okazaki, Otake, JP;
Katsuaki Kurata, Otake, JP;
Toshiaki Hiramoto, Otake, JP;
Akino Sato, Otake, JP;
Wataru Oda, Otake, JP;
JX NIPPON OIL & ENERGY CORPORATION, Tokyo, JP;
TODA KOGYO CORP., Hiroshima, JP;
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 %.