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:
Dec. 01, 2020
Filed:
Jul. 29, 2011
Nobushige Nakamura, Hitachi, JP;
Yoshito Ishii, Hitachi, JP;
Hidetoshi Honbou, Hitachi, JP;
Keiji Okabe, Hitachi, JP;
Yuriko Ida, Hitachi, JP;
Nobushige Nakamura, Hitachi, JP;
Yoshito Ishii, Hitachi, JP;
Hidetoshi Honbou, Hitachi, JP;
Keiji Okabe, Hitachi, JP;
Yuriko Ida, Hitachi, JP;
HITACHI CHEMICAL COMPANY, LTD., Tokyo, JP;
Abstract
An anode material for a lithium ion secondary battery that includes a carbon material having an average interlayer spacing das determined by X-ray diffraction of from 0.335 nm to 0.340 nm, a volume average particle diameter (50% D) of from 1 μm to 40 μm, a maximum particle diameter Dof 74 μm or less, and at least two exothermic peaks within a temperature range of from 300° C. to 1000° C. in a differential thermal analysis in an air stream.