Asahi Kasei Kabushiki Kaisha

Asahi Kasei E-materials Corporation

Shintaro Inaba

Daisuke Inagaki

Masato Murakami

Hiroshi Hatayama

Shinya Hisamitsu

Hisashi Takeda

A separator for electricity storage devices, which comprises a porous layer that contains a polyolefin resin and an ionic compound, and which is configured such that: the content of the ionic compound in the porous layer is from 5% by mass to 99% by mass (inclusive); and the degree of whiteness of this separator is more than 98.0.

Separator for electricity storage devices, and electricity storage device

This separator for a power storage device has a porous layer containing a polyolefin resin and surface-treated ionic compound. The ionic compound content of the porous layer is 5 to 99 mass %, and the degree of surface hydrophilicity of the ionic compound is 0.10 to 0.80.

Separator for power storage device and method for producing same, and power storage device and method for producing same

A microporous membrane winding includes a microporous membrane wound around a core. The core has an outer diameter of 5 inches or greater, and has an outer surface with a surface roughness of 3.0 &#x3bc;m or less. A microporous membrane that is excellent in thickness uniformity and is favorably used as a separator for a lithium-ion secondary battery can be obtained from the microporous membrane winding.

Growing community of inventors

Tokyo, Japan

Shintaro Inaba