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:
Mar. 15, 2016
Filed:
Oct. 19, 2012
Showa Denko K.k., Minato-ku, Tokyo, JP;
Masataka Takeuchi, Tokyo, JP;
Yuuichi Kamijou, Tokyo, JP;
Yoshiyuki Nishimura, Tokyo, JP;
Ryusuke Miura, Tokyo, JP;
Takayuki Fukai, Tokyo, JP;
Chiaki Sotowa, Tokyo, JP;
SHOWA DENKO K.K., Tokyo, JP;
Abstract
A method for producing a graphie material for an electrode material for lithium ion batteries, including a step for exothermically graphitizing a carbon material by directly passing an electric current therethrough. The carbon material has an compact powder resistivity of 0.4 Ω·cm or less when compressed to a density of 1.4 g/cm, has an angle of repose in the range of 20° to 50° inclusive, and has a particle size (D90) in the volume-based particle size distribution measured using laser diffraction of 120 μm or less. The average surface interval (d002) of a surface (002) of the carbon material after graphitization, measured using x-ray diffraction, is in the range of 0.3354 nm-0.3450 nm inclusive.