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:
Jul. 16, 2013
Filed:
Sep. 14, 2012
Hiroki Nagai, Nagoya, JP;
Masahiro Morita, Toyota, JP;
Kensaku Mori, Niihama, JP;
Shin Imaizumi, Niihama, JP;
Kenji Ikeuchi, Niihama, JP;
Toshiyuki Osako, Niihama, JP;
Hiroyuki Toya, Niihama, JP;
Hiroki Nagai, Nagoya, JP;
Masahiro Morita, Toyota, JP;
Kensaku Mori, Niihama, JP;
Shin Imaizumi, Niihama, JP;
Kenji Ikeuchi, Niihama, JP;
Toshiyuki Osako, Niihama, JP;
Hiroyuki Toya, Niihama, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota-shi, Aichi-ken, JP;
Sumitomo Metal Mining Co., Ltd., Tokyo, JP;
Abstract
Active material particles are provided that exhibit performance suitable for increasing the output of a lithium secondary battery and little deterioration due to charge-discharge cycling. The active material particles provided by the present invention have a hollow structure having secondary particles including an aggregate of a plurality of primary particles of a lithium transition metal oxide, and a hollow portion formed inside the secondary particles, and through holes that penetrates to the hollow portion from the outside are formed in the secondary particles. BET specific surface area of the active material particles is 0.5 to 1.9 m/g.