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).
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Publication number: 20230344078Abstract: 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: ApplicationFiled: July 3, 2023Publication date: October 26, 2023Applicant: Asahi Kasei Kabushiki KaishaInventors: Xun Zhang, Ryo Kuroki, Yuichiro Ido, Kensuke Niimura, Tomoki Ishikawa
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Publication number: 20210074983Abstract: 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: ApplicationFiled: September 25, 2019Publication date: March 11, 2021Applicant: Asahi Kasei Kabushiki KaishaInventors: Xun Zhang, Ryo Kuroki, Yuichiro Ido, Kensuke Niimura, Tomoki Ishikawa
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Patent number: 10446847Abstract: 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: GrantFiled: July 8, 2015Date of Patent: October 15, 2019Assignee: Asahi Kasei Kabushiki KaishaInventors: Nobuhiro Okada, Yuima Kimura, Yusuke Yamahata, Osamu Saito, Kensuke Niimura, Hidefumi Takami
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Patent number: 10242809Abstract: 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: GrantFiled: November 18, 2014Date of Patent: March 26, 2019Assignee: Asahi Kasei Kabushiki KaishaInventors: Nobuhiro Okada, Yusuke Yamahata, Kensuke Niimura, Yuima Kimura, Osamu Saito
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Patent number: 10242807Abstract: 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: GrantFiled: January 21, 2014Date of Patent: March 26, 2019Assignee: Asahi Kasei Kabushiki KaishaInventors: Nobuhiro Okada, Osamu Saito, Kensuke Niimura
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Patent number: 10236133Abstract: 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: GrantFiled: September 18, 2013Date of Patent: March 19, 2019Assignee: Asahi Kasei Kabushiki KaishaInventors: Nobuhiro Okada, Osamu Saito, Kensuke Niimura
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Publication number: 20170207459Abstract: 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: ApplicationFiled: July 8, 2015Publication date: July 20, 2017Applicant: Asahi Kasei Kabushiki KaishaInventors: Nobuhiro Okada, Yuima Kimura, Yusuke Yamahata, Osamu Saito, Kensuke Niimura, Hidefumi Takami
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Publication number: 20160300667Abstract: 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: ApplicationFiled: November 18, 2014Publication date: October 13, 2016Applicant: Asahi Kasei Kabushiki KaishaInventors: Nobuhiro OKADA, Yusuke YAMAHATA, Kensuke NIIMURA, Yuima KIMURA, Osamu SAITO
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Publication number: 20150371788Abstract: 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: ApplicationFiled: January 21, 2014Publication date: December 24, 2015Applicant: ASAHI KASEI KABUSHIKI KAISHAInventors: Nobuhiro Okada, Osamu Saito, Kensuke Niimura
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Publication number: 20150243449Abstract: 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: ApplicationFiled: September 18, 2013Publication date: August 27, 2015Applicant: Asahi Kasei Kabushiki KaishaInventors: Nobuhiro Okada, Osamu Saito, Kensuke Niimura