Asahi Kasei Chemicals Corporation

Asahi Kasei Kabushiki Kaisha

Asahi Kasei E-materials Corporation

Toyo Tanso Co., Ltd.

Hiroshi Hatayama

Hiroshi Murata

Masato Murakami

Tetsuro Tojo

Masaki Ishikawa

Shinji Saito

Yuki Uchida

Daisuke Inagaki

Hiroshi Sogo

Shintaro Inaba

Shinya Hisamitsu

Takashi Ikemoto

Noboru Kubota

Masanori Nakazawa

Shinya Kawasoe

Makoto Hongu

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

Provided is a separator for electricity storage devices, which comprises an active layer that contains a material (A) that is capable of absorbing lithium (Li), and which has an air permeability of 650 s/100 ml or less.

Separator including active layer having lithium-occluding material, and electricity storage device including the same

A separator for nonaqueous electrolyte batteries having multilayer porous membrane, having a polyolefin microporous membrane and a porous layer having an inorganic filler, disposed on at least one side of the polyolefin microporous membrane, wherein, in pores with an area of 0.01 &#x3bc;mor more in a cross section of the porous layer, the pores having an angle &#x3b8; formed between a major axis of each pore and an axis in parallel with an interface between the microporous membrane and the porous layer in a range of 60&#xb0;&#x2264;&#x3b8;&#x2264;120&#xb0; occupying a proportion of 30% or more therein.

Separator including polyolefin microporous membrane and inorganic porous layer, and nonaqueous electrolyte battery using the same

A multilayer porous membrane comprising a porous membrane containing a polyolefin resin as a main component; and a porous layer containing an inorganic filler and a resin binder and laminated on at least one surface of the porous membrane; wherein the porous membrane has an average pore size d=0.035 to 0.060 &#x3bc;m, a tortuosity &#x3c4;=1.1 to 1.7, and the number B of pores=100 to 500 pores/&#x3bc;m, which are calculated by a gas-liquid method, and the porous membrane has a membrane thickness L=5 to 22 &#x3bc;m.

Porous membrane and multilayer porous membrane

The present invention provides a polyolefin microporous membrane made of a polyolefin resin and an inorganic particle, and the puncture strength of the microporous membrane is 3 N/20 &#x3bc;m or more and the membrane thickness retention ratio in penetration creep is 16% or more, thereby being excellent in safety and long-term reliability, and a separator for a nonaqueous electrolyte battery, and the like can be provided.

Polyolefin microporous membrane and separator for nonaqueous electrolyte battery

Separator for nonaqueous electrolyte batteries containing a porous membrane

A microporous film, characterized in that it is prepared by a method comprising melting and kneading a polyolefin resin, inorganic particles and a plasticizer, forming the resultant mixture into a sheet, subjecting the rejecting the resultant sheet to a biaxial stretching treatment of a surface magnification of not less than 20 and less than 100 times, and then extracting the plasticizer, it has an inorganic particle content of 20 to 60 mass %, and it exhibits a piercing strength of 3.0 N/20 &#x3bc;m or more.

Microporous polyolefin film and separator for storage cell

A separator for a lithium ion secondary battery with an alloy based negative electrode, wherein a dynamic friction coefficient of at least one surface is 0.1 or more and 0.4 or less, and a method for manufacturing the same.

Separator for lithium ion secondary battery and method for manufacturing the same

A method for membrane filtration purification of suspended water, comprising filtering the suspended water under an external pressure through a porous hollow fiber membrane comprising a polyolefin, a copolymer of olefin and halogenated olefin, halogenated polyolefin or a mixture thereof and having an open area ratio in an outer surface of not less than 20% and a pore diameter in a minimum pore diameter layer of not smaller than 0.03 &#x3bc;m and not larger than 1 &#x3bc;m.

Growing community of inventors

Tokyo, Japan

Hiroshi Hatayama