Patents by Inventor Yutaka Kishii
Yutaka Kishii 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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Patent number: 10930926Abstract: The invention provides a cathode sheet for use in a nonaqueous electrolyte secondary battery, including a composite material comprising a collector and a layer of a cathode active material provided thereon. The layer of a cathode active material includes: (a) a conductive polymer and (b) at least one selected from a polycarboxylic acid and a metal salt of a polycarboxylic acid; and the conductive polymer is a polymer in a dedoped state or in a dedoped and reduced state. The polymer constituting the conductive polymer is at least one selected from polyaniline, a polyaniline derivative, polypyrrole, a polypyrrole derivative, and polythiophene; and the polycarboxylic acid is at least one selected from polyacrylic acid, polymethacrylic acid, polyvinylbenzoic acid, polyallylbenzoic acid, polymethallylbenzoic acid, polymaleic acid, polyfumaric acid, polyglutaminic acid, polyaspartic acid, alginic acid, carboxymethylcellulose, and a copolymer including repeating units of at least two of the polymers listed herein.Type: GrantFiled: July 6, 2017Date of Patent: February 23, 2021Assignee: NITTO DENKO CORPORATIONInventors: Masao Abe, Akira Otani, Yujiro Kawashima, Yoshihiro Uetani, Hiroyoshi Take, Yutaka Kishii, Aimi Matsuura, Yuki Kajisa, Yohei Ando
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Publication number: 20170317345Abstract: The invention provides a cathode sheet for use in a nonaqueous electrolyte secondary battery, including a composite material comprising a collector and a layer of a cathode active material provided thereon. The layer of a cathode active material includes: (a) a conductive polymer and (b) at least one selected from a polycarboxylic acid and a metal salt of a polycarboxylic acid; and the conductive polymer is a polymer in a dedoped state or in a dedoped and reduced state. The polymer constituting the conductive polymer is at least one selected from polyaniline, a polyaniline derivative, polypyrrole, a polypyrrole derivative, and polythiophene; and the polycarboxylic acid is at least one selected from polyacrylic acid, polymethacrylic acid, polyvinylbenzoic acid, polyallylbenzoic acid, polymethallylbenzoic acid, polymaleic acid, polyfumaric acid, polyglutaminic acid, polyaspartic acid, alginic acid, carboxymethylcellulose, and a copolymer including repeating units of at least two of the polymers listed herein.Type: ApplicationFiled: July 6, 2017Publication date: November 2, 2017Applicant: NITTO DENKO CORPORATIONInventors: Masao ABE, Akira OTANI, Yujiro KAWASHIMA, Yoshihiro UETANI, Hiroyoshi TAKE, Yutaka KISHII, Aimi MATSUURA, Yuki KAJISA, Yohei ANDO
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Patent number: 9735423Abstract: The invention provides a nonaqueous electrolyte secondary battery having a cathode and an anode arranged so as to be opposite to each other, and an electrolyte layer put therebetween; wherein the cathode comprises: (a) a conductive polymer and (b) at least one selected from the group consisting of a polycarboxylic acid and a metal salt thereof, and wherein the anode comprises a material into which a base metal or ions thereof can be inserted and from which a base metal or ions thereof can be extracted. The invention further provides a cathode sheet for use in the nonaqueous electrolyte secondary battery mentioned above.Type: GrantFiled: June 27, 2012Date of Patent: August 15, 2017Assignee: NITTO DENKO CORPORATIONInventors: Masao Abe, Akira Otani, Yujiro Kawashima, Yoshihiro Uetani, Hiroyoshi Take, Yutaka Kishii, Aimi Matsuura, Yuki Kajisa, Yohei Ando
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Publication number: 20160043400Abstract: A power storage device electrode is provided, which includes a layer made of a composite material containing an organic sulfide compound (A) as an electrode active material and a sulfide-containing organic polymer (B) as a binder, and a current collector stacked on the layer. The power storage device electrode is used as a positive electrode of a power storage device. Therefore, the power storage device is less liable to suffer from reduction in capacity during repeated charge/discharge, and has a higher capacity density and a higher energy density.Type: ApplicationFiled: March 24, 2014Publication date: February 11, 2016Applicant: NITTO DENKO CORPORATIONInventors: Yutaka KISHII, Masao ABE, Yoshihiro UETANI
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Publication number: 20150318549Abstract: For achievement of a novel electricity storage device excellent in charge and discharge velocity and in capacity density, and an electrode and a porous sheet for use in the same, an electricity storage device including an electrolyte layer, a positive electrode, and a negative electrode is provided, wherein the electrolyte layer is interposed between the electrodes, and wherein at least one of the electrodes is a porous film made from a solution having an electrically conductive polymer in a reduced state.Type: ApplicationFiled: November 26, 2013Publication date: November 5, 2015Applicant: NITTO DENKO CORPORATIONInventors: Yutaka KISHII, Masao ABE, Akira OTANI, Yoshihiro UETANI
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Publication number: 20150303476Abstract: A power storage device including an electrolyte layer, and a positive electrode and a negative electrode provided, with the electrolyte layer interposed therebetween. At least one of the electrodes is a composite including at least a thiophene polymer (A) having electrical conductivity varied by ion insertion/desertion, and a polycarboxylic acid (B). The polycarboxylic acid (B) is fixed in the electrode. A high-performance power storage device having an excellent capacity density per active substance weight and excellent high-speed charge and discharge characteristics is provided.Type: ApplicationFiled: November 12, 2013Publication date: October 22, 2015Applicant: NITTO DENKO CORPORATIONInventors: Yutaka KISHII, Masao ABE, Akira OTANI, Yoshihiro UETANI, Shigenori MORITA
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Publication number: 20150235777Abstract: A higher performance positive electrode for a power storage device is provided, which ensures a higher capacity density per unit weight of an active substance and, particularly, a higher initial capacity in initial charge/discharge. The power storage device positive electrode includes electrically conductive polymer particles as an active substance, and the electrically conductive polymer particles each have a flat shape.Type: ApplicationFiled: August 7, 2013Publication date: August 20, 2015Applicant: NITTO DENKO CORPORATIONInventors: Yohei Ando, Yutaka Kishii, Masao Abe, Yoshihiro Uetani, Hiroyoshi Take, Atsuko Mizuike
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Publication number: 20150162613Abstract: A power storage device positive electrode which ensures development of a higher capacity at the initial stage of a charge/discharge process and a higher capacity density is provided. The power storage device positive electrode contains an electrically conductive polymer as a positive electrode substance, where the electrically conductive polymer is present in a particulate form having a median diameter of not greater than 5 ?m.Type: ApplicationFiled: August 7, 2013Publication date: June 11, 2015Applicant: NITTO DENKO CORPORATIONInventors: Yohei Ando, Yutaka Kishii, Masao Abe, Yoshihiro Uetani
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Publication number: 20140220438Abstract: The invention provides a nonaqueous electrolyte secondary battery having a cathode and an anode arranged so as to be opposite to each other, and an electrolyte layer put therebetween; wherein the cathode comprises: (a) a conductive polymer and (b) at least one selected from the group consisting of a polycarboxylic acid and a metal salt thereof, and wherein the anode comprises a material into which a base metal or ions thereof can be inserted and from which a base metal or ions thereof can be extracted. The invention further provides a cathode sheet for use in the nonaqueous electrolyte secondary battery mentioned above.Type: ApplicationFiled: June 27, 2012Publication date: August 7, 2014Applicant: NITTO DENKO CORPORATIONInventors: Masao Abe, Akira Otani, Yujiro Kawashima, Yoshihiro Uetani, Hiroyoshi Take, Yutaka Kishii, Aimi Matsuura, Yuki Kajisa, Yohei Ando
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Publication number: 20130295488Abstract: Provided are a polymer electrolyte membrane exhibiting a relatively high ion conductivity, and a method for producing the polymer electrolyte membrane. The polymer electrolyte membrane of the present invention is an ion-conducting polymer electrolyte membrane including a polymer. The polymer includes a hydrophobic main chain and side chains bonded to the main chain. Each of the side chains includes a hydrophobic main chain portion and a plurality of side chain portions bonded to the main chain portion. Each of the side chain portions includes a hydrophobic first portion bonded to the main chain portion, and a second portion bonded to the first portion. The second portion includes an ion-conducting group.Type: ApplicationFiled: May 2, 2013Publication date: November 7, 2013Applicants: JAPAN ATOMIC ENERGY AGENCY, NITTO DENKO CORPORATIONInventors: Yutaka KISHII, Hideyuki EMORI, Hiroyuki NISHII, Shin HASEGAWA, Shin-ichi SAWADA, Yasunari MAEKAWA
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Patent number: 8357260Abstract: A partially crosslinked adhesive-supported porous film for battery separator, which in producing a battery, can effectively produce a battery as an electrode/separator laminate in which an electrode and a separator are temporarily bonded to each other without causing mutual slip movement between the electrode and the separator and which after producing a battery, functions itself as a separator having a small heat shrinkage factor even at high temperatures, and a process of producing a battery using such a partially crosslinked adhesive-supported porous film.Type: GrantFiled: August 26, 2011Date of Patent: January 22, 2013Assignee: Nitto Denko CorporationInventors: Keisuke Kii, Michio Satsuma, Yoshihiro Uetani, Mutsuko Yamaguchi, Yutaka Kishii, Shuuhei Murata, Tomoaki Ichikawa
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Publication number: 20110308727Abstract: A partially crosslinked adhesive-supported porous film for battery separator, which in producing a battery, can effectively produce a battery as an electrode/separator laminate in which an electrode and a separator are temporarily bonded to each other without causing mutual slip movement between the electrode and the separator and which after producing a battery, functions itself as a separator having a small heat shrinkage factor even at high temperatures, and a process of producing a battery using such a partially crosslinked adhesive-supported porous film.Type: ApplicationFiled: August 26, 2011Publication date: December 22, 2011Applicant: NITTO DENKO CORPORATIONInventors: Keisuke KII, Michio SATSUMA, Yoshihiro UETANI, Mutsuko YAMAGUCHI, Yutaka KISHII, Shuuhei MURATA, Tomoaki ICHIKAWA
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Patent number: 7318984Abstract: An adhesive composition-supporting separator for a battery includes a porous substrate supporting thereon a thermally cross-linkable adhesive composition comprising a multi-functional isocyanate and a reactive polymer having a functional group capable of reacting with an isocyanato group of the multi-functional isocyanate; an electrode/separator laminate is obtained by contact pressing the adhesive composition-supporting separator for a battery against electrodes; and an electrode/separator bonded material having a cross-linked adhesive composition is obtained by heating the electrode/separator laminate to thereby react the multifunctional isocyanate with the reactive polymer for causing cross-linking.Type: GrantFiled: April 25, 2003Date of Patent: January 15, 2008Assignee: Nitto Denko CorporationInventors: Michio Satsuma, Keisuke Kii, Yoshihiro Uetani, Yutaka Kishii, Mutsuko Yamaguchi, Shuuhei Murata
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Patent number: 6896994Abstract: A separator capable of inhibiting the self-discharge of a battery. The separator is a battery separator obtained by applying a polymer having in the molecule a carbodiimide unit represented by the following formula (I): —[—R—N?C?N—]n—??(I) (wherein R means an organic group and n means an integer of 1 to 10,000) to a porous sheet substrate.Type: GrantFiled: April 4, 2001Date of Patent: May 24, 2005Assignee: Nitto Denko CorporationInventors: Masakatsu Urairi, Keisuke Kii, Yutaka Kishii, Yutaka Yamamura, Masao Abe, Sadahito Misumi
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Patent number: 6811927Abstract: A battery highly inhibited from suffering self-discharge. The battery is characterized by containing a built-in polymer which has in the molecule a carbodiimide unit represented the following formula (I): —[—R—N═C═N—)]n— (I) wherein R means an organic group and n means an integer of 1 to 10,000).Type: GrantFiled: November 28, 2001Date of Patent: November 2, 2004Assignee: Nitto Denko CorporationInventors: Masakatsu Urairi, Keisuke Kii, Yutaka Kishii, Yutaka Yamamura, Masao Abe, Sadahito Misumi, Fumiteru Asai
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Publication number: 20040101757Abstract: A partially crosslinked adhesive-supported porous film for battery separator, which in producing a battery, can effectively produce a battery as an electrode/separator laminate in which an electrode and a separator are temporarily bonded to each other without causing mutual slip movement between the electrode and the separator and which after producing a battery, functions itself as a separator having a small heat shrinkage factor even at high temperatures, and a process of producing a battery using such a partially crosslinked adhesive-supported porous film.Type: ApplicationFiled: November 3, 2003Publication date: May 27, 2004Applicant: NITTO DENKO CORPORATIONInventors: Keisuke Kii, Michio Satsuma, Yoshihiro Uetani, Mutsuko Yamaguchi, Yutaka Kishii, Shuuhei Murata, Tomoaki Ichikawa
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Patent number: 6716553Abstract: There are provided a porous film comprising a polymer composition comprising (a) a polymer having C═C double bond and an aliphatic ring having 5 to 10 carbon atoms in a main chain thereof; and (b) another resin; a porous film, wherein all or a part of C═C double bond in the (a) polymer is disappeared; and a porous film, wherein the (a) polymer and the (b) resin are cross-linked therebetween. The porous film has appropriate porosity, air permeability and puncture strength, and is especially excellent in latent heat resistance or heat resistance. Further, there are provided a process for producing the porous film; a separator for a battery comprising the porous film; and a battery comprising the separator.Type: GrantFiled: January 5, 2001Date of Patent: April 6, 2004Assignee: Nitto Denko CorporationInventors: Shigeru Fujita, Kazushige Yamamoto, Shunsuke Noumi, Yoshihiro Uetani, Hideyuki Emori, Yutaka Kishii, Yutaka Yamamura
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Publication number: 20030215704Abstract: An adhesive composition-supporting separator for a battery includes a porous substrate supporting thereon a thermally cross-linkable adhesive composition comprising a multi-functional isocyanate and a reactive polymer having a functional group capable of reacting with an isocyanato group of the multi-functional isocyanate; an electrode/separator laminate is obtained by contact pressing the adhesive composition-supporting separator for a battery against electrodes; and an electrode/separator bonded material having a cross-linked adhesive composition is obtained by heating the electrode/separator laminate to thereby react the multifunctional isocyanate with the reactive polymer for causing cross-linking.Type: ApplicationFiled: April 25, 2003Publication date: November 20, 2003Applicant: NITTO DENKO CORPORATIONInventors: Michio Satsuma, Keisuke Kii, Yoshihiro Uetani, Yutaka Kishii, Mutsuko Yamaguchi, Shuuhei Murata
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Publication number: 20020172870Abstract: A separator capable of inhibiting the self-discharge of a battery.Type: ApplicationFiled: December 4, 2001Publication date: November 21, 2002Inventors: Masakatsu Urairi, Keisuke Kii, Yutaka Kishii, Yutaka Yamamura, Masao Abe, Sadahito Misumi
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Patent number: 5731074Abstract: A porous film of a laminate structure, comprising a porous inner layer comprising polyethylene as the essential component, and having formed on both surfaces thereof a porous outer layer comprising polypropylene and having a Vickers hardness of 10 or more. The porous film is suitable as a separator for a lithium battery, and when the porous film is superposed with a positive electrode and a negative electrode, the film is difficult to be scratched and perforated at the assembly of cells. A production method of the porous film is also provided.Type: GrantFiled: January 17, 1997Date of Patent: March 24, 1998Assignee: Nitto Denko CorporationInventors: Soji Nishiyama, Hiroyuki Higuchi, Kiichiro Matsushita, Yutaka Kishii, Ryoichi Matsushima