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:
Feb. 16, 2016
Filed:
Jan. 21, 2010
Applicants:
Hiroki Nagai, Nagoya, JP;
Masahiro Morita, Toyota, JP;
Yukihiro Okada, Shijyonawate, JP;
Inventors:
Assignee:
Toyota-Jidosha Kabushiki Kaisha, Toyota-shi, Aichi, JP;
Primary Examiner:
Int. Cl.
CPC ...
H01M 4/13 (2010.01); H01M 4/131 (2010.01); H01M 4/62 (2006.01); H01M 10/052 (2010.01); H01M 4/02 (2006.01);
U.S. Cl.
CPC ...
H01M 4/13 (2013.01); H01M 4/131 (2013.01); H01M 4/625 (2013.01); H01M 10/052 (2013.01); H01M 2004/021 (2013.01); Y02E 60/122 (2013.01); Y02T 10/7011 (2013.01); Y10T 29/49108 (2015.01);
Abstract
A lithium secondary battery of the present invention has a positive electrode is provided with a positive electrode mix layer that includes a positive electrode active material and a conductive material. The positive electrode mix layer has two peaks, large and small, of differential pore volume over a pore size ranging from 0.01 μm to 10 μm in a pore distribution curve measured by a mercury porosimeter. A pore size of the smaller peak B of the differential pore volume is smaller than a pore size of the larger peak A of the differential pore volume.