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:
Aug. 07, 2001
Filed:
Jul. 16, 1997
Applicant:
Inventors:
Yasuhisa Yamashita, Shiga-ken, JP;
Koji Hattori, Shiga-ken, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/58 ;
U.S. Cl.
CPC ...
H01M 4/58 ;
Abstract
The invention provides a lithium secondary battery, comprising a cathode having a spinel-structured lithium-manganese complex oxide as the active material, which is characterized in that the particles of said spinel-structured lithium-manganese complex oxide are hollow, spherical secondary particles formed by sintering of primary particles, and said secondary particles have a mean particle size of from about 1 to 5 micrometer and a specific surface area of from about 2 to 10 m,/g. The lithium secondary battery has a high capacity and excellent charge-discharge cycle characteristics.