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:
Jul. 19, 2011
Filed:
Jan. 12, 2006
Shoji Sasaki, Aomori, JP;
Tsuyoshi Temma, Aomori, JP;
Munehiro Kadowaki, Tokyo, JP;
Hironori Ozawa, Tokyo, JP;
Kazunori Ozawa, Tokyo, JP;
Syujun Shikano, Yamagata, JP;
Kanji Matsuda, Yamagata, JP;
Shoji Sasaki, Aomori, JP;
Tsuyoshi Temma, Aomori, JP;
Munehiro Kadowaki, Tokyo, JP;
Hironori Ozawa, Tokyo, JP;
Kazunori Ozawa, Tokyo, JP;
Syujun Shikano, Yamagata, JP;
Kanji Matsuda, Yamagata, JP;
Enax, Inc., Tokyo, JP;
Abstract
A negative electrode carbon material for a lithium ion secondary battery manufactured by calcinating a rice starch portion obtained by removing the pericarp and tests from unpolished rice and a method for manufacturing the same. The rice starch portion is preferably middle-grade white bran or high-grade white bran each obtained when unpolished rice is polished. The above negative electrode carbon material may have a relatively broad peak at a 2θ of 40 to 50° and a sharp peak at a 2θ of 42 to 44° in its powder X-ray (CuKα) diffraction. According to the present invention, a negative electrode carbon material for a lithium ion secondary battery which has the same quality as the prior art product can be manufactured at a low cost by making effective use of middle-grade white bran or high-grade white bran of rice.