Patents by Inventor Kensuke Niimura

Kensuke Niimura has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20230344078
    Abstract: A separator for an electricity storage device has a cross-sectional crystal orientation of 0.85 or greater, and/or a method for producing the separator for an electricity storage device comprises a step of using a continuous mixer under conditions with a temperature of 20° C. to 70° C., a shear rate of 100 to 400,000 seconds?1 and a residence time of 1.0 seconds to 60 seconds, for mixing of polyethylene-containing polyolefin powder with a plasticizer to produce a mixed slurry, a step of extruding the mixed slurry and cooling it to solidification to process it into a cast sheet, and a step of biaxially stretching the cast sheet to an area increase factor of 20 to 200.
    Type: Application
    Filed: July 3, 2023
    Publication date: October 26, 2023
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Xun Zhang, Ryo Kuroki, Yuichiro Ido, Kensuke Niimura, Tomoki Ishikawa
  • Publication number: 20210074983
    Abstract: A separator for an electricity storage device has a cross-sectional crystal orientation of 0.85 or greater, and/or a method for producing the separator for an electricity storage device comprises a step of using a continuous mixer under conditions with a temperature of 20° C. to 70° C., a shear rate of 100 to 400,000 seconds?1 and a residence time of 1.0 seconds to 60 seconds, for mixing of polyethylene-containing polyolefin powder with a plasticizer to produce a mixed slurry, a step of extruding the mixed slurry and cooling it to solidification to process it into a cast sheet, and a step of biaxially stretching the cast sheet to an area increase factor of 20 to 200.
    Type: Application
    Filed: September 25, 2019
    Publication date: March 11, 2021
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Xun Zhang, Ryo Kuroki, Yuichiro Ido, Kensuke Niimura, Tomoki Ishikawa
  • Patent number: 10446847
    Abstract: A non-aqueous lithium-type power storage element obtained by a non-aqueous liquid electrolyte and an electrode laminate having a negative electrode body, a positive electrode body, and a separator being accommodated in an exterior body, wherein: the negative electrode body includes a negative electrode current collector and a negative electrode active material including a carbon material capable of occluding and releasing lithium ions.
    Type: Grant
    Filed: July 8, 2015
    Date of Patent: October 15, 2019
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Nobuhiro Okada, Yuima Kimura, Yusuke Yamahata, Osamu Saito, Kensuke Niimura, Hidefumi Takami
  • Patent number: 10242809
    Abstract: A non-aqueous lithium-type power storage element comprising an electrode laminate body and a non-aqueous electrolyte being housed in an external body, the electrode laminate body having a negative electrode body, a positive electrode body and a separator.
    Type: Grant
    Filed: November 18, 2014
    Date of Patent: March 26, 2019
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Nobuhiro Okada, Yusuke Yamahata, Kensuke Niimura, Yuima Kimura, Osamu Saito
  • Patent number: 10242807
    Abstract: Provided is a lithium ion capacitor that is capable, during internal short circuiting, of suppressing an increase in capacitor temperature and controlling the onset of gasification, smoking and ignition, and of having preferably both low resistance (i.e., high output density) and high cycle characteristics. The lithium ion capacitor comprises an electrode laminated body stored in a casing together with a non-aqueous electrolytic solution containing a lithium ion-containing electrolyte; wherein the electrode laminated body is laminated so that a negative electrode collector having a negative electrode active material comprised of a carbon material, and a positive electrode body having a positive electrode active material face each other through a laminated separator where a polyolefin porous membrane and an insulating porous membrane are laminated; and characterized in that the insulating porous membrane is in contact with the negative electrode body.
    Type: Grant
    Filed: January 21, 2014
    Date of Patent: March 26, 2019
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Nobuhiro Okada, Osamu Saito, Kensuke Niimura
  • Patent number: 10236133
    Abstract: Provided is a lithium ion capacitor comprising, accommodated within an outer casing: an electrode stack obtained by stacking a negative electrode in which a negative-electrode active material layer including a carbon material as the negative-electrode active material is disposed on a negative-electrode collector, a separator comprising a polyethylene-containing polyolefin resin, and a positive electrode in which a positive-electrode active material layer including a positive-electrode active material layer comprising a carbon material or a carbonaceous material is disposed on a positive-electrode collector; and a non-aqueous electrolyte solution including a lithium ion-containing electrolyte.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: March 19, 2019
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Nobuhiro Okada, Osamu Saito, Kensuke Niimura
  • Publication number: 20170207459
    Abstract: A non-aqueous lithium-type power storage element obtained by a non-aqueous liquid electrolyte and an electrode laminate having a negative electrode body, a positive electrode body, and a separator being accommodated in an exterior body, wherein: the negative electrode body includes a negative electrode current collector and a negative electrode active material including a carbon material capable of occluding and releasing lithium ions.
    Type: Application
    Filed: July 8, 2015
    Publication date: July 20, 2017
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Nobuhiro Okada, Yuima Kimura, Yusuke Yamahata, Osamu Saito, Kensuke Niimura, Hidefumi Takami
  • Publication number: 20160300667
    Abstract: A non-aqueous lithium-type power storage element comprising an electrode laminate body and a non-aqueous electrolyte being housed in an external body, the electrode laminate body having a negative electrode body, a positive electrode body and a separator.
    Type: Application
    Filed: November 18, 2014
    Publication date: October 13, 2016
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Nobuhiro OKADA, Yusuke YAMAHATA, Kensuke NIIMURA, Yuima KIMURA, Osamu SAITO
  • Publication number: 20150371788
    Abstract: Provided is a lithium ion capacitor that is capable, during internal short circuiting, of suppressing an increase in capacitor temperature and controlling the onset of gasification, smoking and ignition, and of having preferably both low resistance (i.e., high output density) and high cycle characteristics. The lithium ion capacitor comprises an electrode laminated body stored in a casing together with a non-aqueous electrolytic solution containing a lithium ion-containing electrolyte; wherein the electrode laminated body is laminated so that a negative electrode collector having a negative electrode active material comprised of a carbon material, and a positive electrode body having a positive electrode active material face each other through a laminated separator where a polyolefin porous membrane and an insulating porous membrane are laminated; and characterized in that the insulating porous membrane is in contact with the negative electrode body.
    Type: Application
    Filed: January 21, 2014
    Publication date: December 24, 2015
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Nobuhiro Okada, Osamu Saito, Kensuke Niimura
  • Publication number: 20150243449
    Abstract: Provided is a lithium ion capacitor that is safe and has a high energy density and a high output. Specifically provided is a lithium ion capacitor comprising, accommodated within an outer casing: an electrode stack obtained by stacking a negative electrode in which a negative-electrode active material layer including a carbon material as the negative-electrode active material is disposed on a negative-electrode collector, a separator comprising a polyethylene-containing polyolefin resin, and a positive electrode in which a positive-electrode active material layer including a positive-electrode active material layer comprising a carbon material or a carbonaceous material is disposed on a positive-electrode collector; and a non-aqueous electrolyte solution including a lithium ion-containing electrolyte.
    Type: Application
    Filed: September 18, 2013
    Publication date: August 27, 2015
    Applicant: Asahi Kasei Kabushiki Kaisha
    Inventors: Nobuhiro Okada, Osamu Saito, Kensuke Niimura