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:
Feb. 08, 2005
Filed:
Oct. 03, 2002
Mikito Nagata, Valencia, CA (US);
Hiroyuki Yumoto, Stevenson Ranch, CA (US);
Hisashi Tsukamoto, Saugus, CA (US);
Mikito Nagata, Valencia, CA (US);
Hiroyuki Yumoto, Stevenson Ranch, CA (US);
Hisashi Tsukamoto, Saugus, CA (US);
Quallion LLC, Sylmar, CA (US);
Abstract
A negative electrode for use in secondary battery with nonaqueous electrolyte having a high voltage and energy density and a superior cycle property, characterized in that the active material comprises composite carbon materials containing hard spherical particles, carbon fibers, and graphite flakes. The hard spheres provide structure to the composite, the carbon fibers improve packing density, conductivity, and stiffness to prevent the body made thereof from swelling and decomposing, and the graphite flakes reduce friction in the mixture. An aqueous, non-fluorine-containing binder is used, along with a titanium negative substrate.