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. 20, 2016
Filed:
Oct. 20, 2010
Teppei Takahashi, Hitachi, JP;
Yoshito Ishii, Mito, JP;
Keiji Okabe, Hitachi, JP;
Yuriko Ida, Mito, JP;
Nobushige Nakamura, Hitachi, JP;
Teppei Takahashi, Hitachi, JP;
Yoshito Ishii, Mito, JP;
Keiji Okabe, Hitachi, JP;
Yuriko Ida, Mito, JP;
Nobushige Nakamura, Hitachi, JP;
HITACHI CHEMICAL COMPANY, LTD., Tokyo, JP;
Abstract
Disclosed are carbon particles for a negative electrode of a lithium ion secondary battery, the carbon particles having a pore volume of pores having a size of 2×10 to 2×10Å, of 0.1 ml/g or less with respect to the mass of the carbon particles; having an interlayer distance d(002) of a graphite crystal as determined by an X-ray diffraction analysis, of 3.38 Å or less; having a crystallite size Lc in the C-axis direction of 500 Å or more; and having a degree of circularity of the particle cross-section in the range of 0.6 to 0.9. Therefore, the carbon particles for the negative electrode of the lithium ion secondary battery enables to have high capacity and have superior rapid charge characteristics, a negative electrode for a lithium ion secondary battery using the carbon particles, and a lithium ion secondary battery can be provided.