Asahi Kasei Kabushiki Kaisha

Asahi Kasei Battery Separator Corporation

Yuki Fukunaga

Hiromi Kobayashi

Xun Zhang

Ryo Kuroki

Mitsuko Saito

Manabu Sekiguchi

Keita Dohki

A separator for an electricity storage device comprising a silane-modified polyolefin, wherein silane crosslinking reaction of the silane-modified polyolefin is initiated when it contacts with the electrolyte solution, as well as a method for producing the separator.

Lithium ion battery using crosslinkable separator

There is provided a method for producing a separator for an electricity storage device that includes a step of contacting a porous body formed from a silane-modified polyolefin-containing molded sheet with a base solution or acid solution, and a separator for an electricity storage device comprising a microporous film with a melted film rupture temperature of 180° C. to 220° C. as measured by thermomechanical analysis (TMA).

Separator having silane-modified polyolefin and polyethylene, and method for producing the same

There is provided a method for producing a separator for an electricity storage device that includes a step of contacting a porous body formed from a silane-modified polyolefin-containing molded sheet with a base solution or acid solution, and a separator for an electricity storage device comprising a microporous film with a melted film rupture temperature of 180&#xb0; C. to 220&#xb0; C. as measured by thermomechanical analysis (TMA).

According to the present invention, a microporous membrane contains a polyolefin resin and inorganic particles; the primary particle diameter of the inorganic particles is 100 nm or less; the content of the inorganic particles is 10-60% by mass or 10% by mass or more but less than 40% by mass based on the mass of the microporous membrane; and the retention time at 150&#xb0; C. is less than 200 seconds or the retention time at 145&#xb0; C. is more than 1 second but less than 300 seconds in the thermal behavior evaluation of the microporous membrane.

Polyolefin microporous membrane, separator for electricity storage devices, and electricity storage device

A microporous membrane according to the present invention is a microporous membrane containing a copolymerized high density polyethylene and a high density polyethylene, wherein a content of an &#x3b1;-olefin unit having 3 or more carbon atoms in the microporous membrane is 0.01 mol % or more and 0.6 mol % or less, and a viscosity average molecular weight of the microporous membrane is less than 300,000. In addition, a battery separator according to the present invention contains the above microporous membrane. Further, a battery according to the present invention contains the above battery separator.

Growing community of inventors

Tokyo, Japan

Yuki Fukunaga