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. 02, 2014
Filed:
Feb. 16, 2012
Ikuo Ozaki, Mito, JP;
Yoshimasa Koishikawa, Hitachinaka, JP;
Yoshihisa Okuda, Mito, JP;
Yuki Takei, Hitachinaka, JP;
Ikuo Ozaki, Mito, JP;
Yoshimasa Koishikawa, Hitachinaka, JP;
Yoshihisa Okuda, Mito, JP;
Yuki Takei, Hitachinaka, JP;
Hitachi Automotive Systems, Ltd., Ibaraki, JP;
Abstract
A positive electrode capable of achieving both of high volumetric energy density and high volumetric power density and a lithium ion secondary battery using the same are provided. A lithium ion secondary battery includes a positive electrode including a current collector with a positive active material mixture layer applied on both faces thereof, the positive active material mixture layer including active material particles, conductive additive particles and a binder. The active material particles used have a value D of an average particle diameter D50 of the active material particles in the range from 1 to 10 μm. The ratio b/a of the volume fraction b of the vacancy volume in the positive active material mixture layer to the volume fraction a of the active material particles in the positive active material mixture layer is in the range of −0.01D+0.57≦b/a≦−0.01D+0.97.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile