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:
Apr. 26, 2005
Filed:
Mar. 30, 2001
Hisashi Tsujimoto, Fukushima, JP;
Yoshikatsu Yamamoto, Fukushima, JP;
Junji Kuyama, Kanagawa, JP;
Masayuki Nagamine, Fukushima, JP;
Atsuo Omaru, Fukushima, JP;
Hiroaki Tanizaki, Miyagi, JP;
Hisashi Tsujimoto, Fukushima, JP;
Yoshikatsu Yamamoto, Fukushima, JP;
Junji Kuyama, Kanagawa, JP;
Masayuki Nagamine, Fukushima, JP;
Atsuo Omaru, Fukushima, JP;
Hiroaki Tanizaki, Miyagi, JP;
Sony Corporation, Tokyo, JP;
Abstract
Disclosed is a non-aqueous electrolyte secondary battery having an excellent preservation characteristic at a high temperature and charging/discharging cycle characteristic. A rolled body in which a strip-shape positive electrode and negative electrode are rolled with a separator in-between is provided inside a battery can. The positive electrode contains LiMnMaO(where, Ma is at least one element selected from the group consisting of metal elements other than Mn, and B) and LiNiMbO(where, Mb is at least one element selected from the group consisting of metal elements other than Ni, and B). By replacing part of Mn and Ni with other elements, the crystal structure can be stabilized. Thereby, the capacity retention ratio after preservation at a high temperature, and a heavy load discharging power under a high electric potential cutoff can be improved. The mean particle size of particles of the above-mentioned oxides are preferable to be 30 μm and below so that an excellent charging/discharging cycle characteristic can be obtained.