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:
Aug. 02, 2016
Filed:
Oct. 11, 2013
Showa Denko K.k., Tokyo, JP;
Yasuaki Wakizaka, Tokyo, JP;
Yuichi Kamijo, Tokyo, JP;
Tomohiro Abe, Tokyo, JP;
Yoshiki Shimodaira, Tokyo, JP;
Akinori Sudoh, Tokyo, JP;
Chiaki Sotowa, Tokyo, JP;
Yoshihito Yokoyama, Tokyo, JP;
Takashi Terashima, Tokyo, JP;
Naoto Kawaguchi, Tokyo, JP;
SHOWA DENKO K.K., Tokyo, JP;
Abstract
A carbon material containing boron atom in an amount of 0.001 to 0.5 mass %, in which the average interplanar spacing (d002) of plane (002) is 0.337 nm or less. By observing optical structures in cross-section of formed bodies made of the carbon material, when areas are accumulated from a smallest structure in an ascending order, SOP represents an area of an optical structure whose accumulated area corresponds to 60% of the total area of all optical structures; when the structures are counted from a structure of a smallest aspect ratio in an ascending order, AROP represents the aspect ratio of the structure which ranks at the position of 60% in total number of all the structures; and when D50 represents an average particle diameter; SOP, AROP and D50 satisfy the following relationship: 1.5≦AROP≦6 and 0.2×D50≦(SOP×AROP)<2×D50. Also disclosed is a secondary battery using the carbon material as an electrode material.