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:
Oct. 20, 2020
Filed:
Sep. 17, 2013
Asahi Kasei Kabushiki Kaisha, Tokyo, JP;
Yusuke Yamada, Tokyo, JP;
Makoto Uozumi, Tokyo, JP;
Takashi Misao, Tokyo, JP;
Mitsutaka Nakamura, Tokyo, JP;
Masaaki Sasayama, Tokyo, JP;
Kazufumi Kato, Tokyo, JP;
Asahi Kasei Kabushiki Kaisha, Tokyo, JP;
Abstract
An object of the present invention is to provide a separator maintaining high rate characteristics and enabling suppression of short circuit. The object is achieved by a separator comprising a substrate having an inner surface and an outer surface, and inorganic particles presented on the outer surface and the inner surface of the substrate, wherein the substrate has a porosity of 55% or more and a mean flow pore size of 30 μm or less, the inorganic particles have an average particle size of 1.0 to 4.0 μm, and the inorganic particles comprises 40% by volume or less of particles having a particle size of 1.0 μm or less and 30 to 75% by volume of particles having a particle size of 2.0 μm or more.