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. 02, 2014
Filed:
Aug. 04, 2011
Ryuta Sugiura, Nagoya, JP;
Akira Urakawa, Nagoya, JP;
Nobuyuki Kobayashi, Nagoya, JP;
Tsutomu Nanataki, Toyoake, JP;
Ryuta Sugiura, Nagoya, JP;
Akira Urakawa, Nagoya, JP;
Nobuyuki Kobayashi, Nagoya, JP;
Tsutomu Nanataki, Toyoake, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
The present invention provides a cathode active material for a lithium secondary battery containing therein an open pore having a protrusion which is formed so as to extend from the inner surface of the open pore toward the center of the open pore. Specifically, the protrusion is formed so as to extend toward the center of a virtual circle formed by approximating the shape of a cross section of the open pore to a circular shape. The protrusion is formed of the same material as the remaining portion of the cathode active material.