Patents by Inventor Yumiko Sekiguchi
Yumiko Sekiguchi 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: 20240097206Abstract: An integrated sheet structure for a secondary battery, including a first mixture layer containing a first active material and a first binder, a second mixture layer containing a second active material and a second binder, and a third mixture layer located between the first mixture layer and the second mixture layer and containing solid particles and a third binder, in which the first mixture layer and the third mixture layer are bonded each other, and the second mixture layer and the third mixture layer are bonded each other.Type: ApplicationFiled: August 31, 2023Publication date: March 21, 2024Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Hirofumi YASUMIISHI, Keigo HOSHINA, Yasuyuki HOTTA, Yumiko SEKIGUCHI, Kazuomi YOSHIMA, Hayato SEKI, Wataru UNO
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Publication number: 20240079575Abstract: Provided is a secondary battery including a negative electrode, a positive electrode, a separation layer in contact with an active material-containing layer of the negative electrode, and an aqueous electrolyte. A first concentration corresponding to a first metal concentration represented by Equation 1 (first metal concentration=atomic concentration of Hg, Pb, Zn, and/or Bi/sum of atomic concentrations of elements B to U in periodic table, excluding carbon and oxygen) in a boundary region between the active material-containing layer and the separation layer is 2% or more and 8.2% or less. A ratio of the first concentration to a second concentration corresponding to the first metal concentration represented by Equation 1 in the active material-containing layer excluding the boundary region is 2.5 or more and less than 4.Type: ApplicationFiled: February 22, 2023Publication date: March 7, 2024Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yumiko SEKIGUCHI, Keigo HOSHINA, Kazuomi YOSHIMA, Yasuyuki HOTTA, Hayato SEKI, Hirofumi YASUMIISHI, Wataru UNO
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Patent number: 11769932Abstract: According to one embodiment, an electrode construct including an electrode and a composite membrane is provided. The electrode includes an active material-containing layer and a current collecting layer. The active material-containing layer includes a first principal surface and a second principal surface. The current collecting layer is in contact with the second principal surface. The composite membrane includes a composite layer in contact with the first principal surface. The composite layer contains inorganic solid particles and a polymeric material. A peel strength ?1 at a first interface between the active material-containing layer and the composite layer and a peel strength ?2 at a second interface between the active material-containing layer and the current collecting layer satisfy a relationship of ?1>?2, and ?2?1 N/cm.Type: GrantFiled: February 26, 2021Date of Patent: September 26, 2023Assignee: Kabushiki Kaisha ToshibaInventors: Yasuyuki Hotta, Yumiko Sekiguchi, Shinsuke Matsuno
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Publication number: 20230298791Abstract: A superconducting coil according to an embodiment includes: a winding frame; a superconducting wire wound around the winding frame and having a first region and a second region facing the first region in a coil radial direction; and a resin layer located between the first region and the second region and including particles, an epoxy resin surrounding the particles, and a region existing between the particle and the epoxy resin, the region including silane containing a phenylamino group. The average particle diameter of the particles is equal to or more than 1 ?m and equal to or less than 5 ?m, and the volume ratio of the particles in the resin layer is equal to or more than 50% and equal to or less than 66%.Type: ApplicationFiled: September 1, 2022Publication date: September 21, 2023Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Mariko HAYASHI, Yumiko SEKIGUCHI, Tomoko EGUCHI, Keiko FUJII
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Patent number: 11695113Abstract: According to one embodiment, provided is a secondary battery including a negative electrode containing a titanium-containing oxide, a positive electrode, a separator between the negative electrode and the positive electrode, a first aqueous electrolyte, a second aqueous electrolyte, and a third aqueous electrolyte. The first aqueous electrolyte is held in the negative electrode and contains 0.001% by mass to 0.5% by mass of zinc ions. The second aqueous electrolyte is held in the separator and contains 1% by mass to 5% by mass of a first compound that includes a hydrophobic portion and a hydrophilic portion. The third aqueous electrolyte is held in the positive electrode.Type: GrantFiled: February 26, 2021Date of Patent: July 4, 2023Assignee: Kabushiki Kalsha ToshibaInventors: Yumiko Sekiguchi, Yasuyuki Hotta, Shinsuke Matsuno
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Publication number: 20230078710Abstract: According to one embodiment, a secondary battery is provided. The secondary battery includes a first electrode having a first current collector, second electrode having a second current collector, and an aqueous electrolyte. The first electrode includes a first lead, and a first joint for electrically connecting the first current collector and the first lead. At least a part of the surface of the first current collector has a first current collector coating. At least a part of the surface of the first lead has a first lead coating. The thickness of the first lead coating is larger than the thickness of the first current collector coating.Type: ApplicationFiled: February 11, 2022Publication date: March 16, 2023Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Keigo HOSHINA, Yumiko SEKIGUCHI, Yasuyuki HOTTA, Shinsuke MATSUNO, Norio TAKAMI
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Publication number: 20220085366Abstract: According to one embodiment, provided is a secondary battery including a negative electrode containing a titanium-containing oxide, a positive electrode, a separator between the negative electrode and the positive electrode, a first aqueous electrolyte, a second aqueous electrolyte, and a third aqueous electrolyte. The first aqueous electrolyte is held in the negative electrode and contains 0.001% by mass to 0.5% by mass of zinc ions. The second aqueous electrolyte is held in the separator and contains 1% by mass to 5% by mass of a first compound that includes a hydrophobic portion and a hydrophilic portion. The third aqueous electrolyte is held in the positive electrode.Type: ApplicationFiled: February 26, 2021Publication date: March 17, 2022Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yumiko SEKIGUCHI, Yasuyuki HOTTA, Shinsuke MATSUNO
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Publication number: 20220085457Abstract: According to one embodiment, an electrode construct including an electrode and a composite membrane is provided. The electrode includes an active material-containing layer and a current collecting layer. The active material-containing layer includes a first principal surface and a second principal surface. The current collecting layer is in contact with the second principal surface. The composite membrane includes a composite layer in contact with the first principal surface. The composite layer contains inorganic solid particles and a polymeric material. A peel strength ?1 at a first interface between the active material-containing layer and the composite layer and a peel strength ?2 at a second interface between the active material-containing layer and the current collecting layer satisfy a relationship of ?1>?2, and ?2?1 N/cm.Type: ApplicationFiled: February 26, 2021Publication date: March 17, 2022Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yasuyuki HOTTA, Yumiko Sekiguchi, Shinsuke Matsuno
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Patent number: 11251470Abstract: A secondary battery includes a positive electrode, a negative electrode and an electrolyte containing aqueous electrolyte. The negative electrode is provided with a negative electrode current collector having a compound including aluminum, and a negative electrode active material including titanium on a granule surface of the negative electrode current collector. A ratio of an atomic concentration of aluminum atoms to sum of atomic concentrations of aluminum atoms and titanium atoms on a surface of the negative electrode ({Al atomic concentration/(Al atomic concentration+Ti atomic concentration)}×100) is 3 atm % or more and 30 atm % or less.Type: GrantFiled: December 18, 2019Date of Patent: February 15, 2022Assignee: Kabushiki Kaisha ToshibaInventors: Yumiko Sekiguchi, Shinsuke Matsuno, Norio Takami
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Patent number: 11139463Abstract: According to one embodiment, a secondary battery is provided. The secondary battery includes a positive electrode, a negative electrode including titanium oxide particles, and an aqueous electrolyte. The surfaces of the titanium oxide particles are partially covered with an alkyl-based silane compound. The ratio IB/IA of the intensity IB of the second peak PB to the intensity IA of the first peak PA is within a range of 4 to 10. The first peak PA is a maximum peak present within a range of 3200 cm?1 to 3600 cm?1 in an infrared absorption spectrum of the titanium oxide particles. The second peak PB is a maximum peak present within a range of 565 cm?1 to 570 cm?1 in the infrared absorption spectrum of the titanium oxide particles.Type: GrantFiled: September 7, 2018Date of Patent: October 5, 2021Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Yumiko Sekiguchi, Shinsuke Matsuno, Norio Takami
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Patent number: 11024879Abstract: According to one embodiment, a secondary battery is provided. The secondary battery includes a positive electrode, a negative electrode, and an aqueous electrolyte containing alkali metal ions. The aqueous electrolyte contains an organic compound containing a carboxyl group or carboxylate group and a hydroxyl group. The pH of the aqueous electrolyte is 0 or less. The ratio of the weight of the organic compound to the weight of the aqueous electrolyte is within a range of 0.01% by weight to 6.5% by weight. The number of carbon atoms in the organic compound is 5 or more.Type: GrantFiled: March 5, 2018Date of Patent: June 1, 2021Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Yumiko Sekiguchi, Shinsuke Matsuno, Hayato Seki
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Patent number: 10873080Abstract: A secondary battery including an aqueous electrolyte, a positive electrode, and a negative electrode. The negative electrode includes a negative electrode active material which contains a Ti-containing composite oxide. At least one element A selected from Hg, Pb, Zn, and Bi is present on a surface of the negative electrode. An average of molar ratios (A/(A+Ti)) of the element A ranges from 5% to 40%. Each of the molar ratios is a molar amount of the element A to a sum between the molar amount of the element A and a molar amount of Ti on the surface of the negative electrode, according to scanning electron microscopy-energy dispersive X-ray spectroscopy.Type: GrantFiled: August 31, 2018Date of Patent: December 22, 2020Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Hayato Seki, Yumiko Sekiguchi, Kazuomi Yoshima, Yasuyuki Hotta, Shinsuke Matsuno, Norio Takami
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Patent number: 10868340Abstract: According to one embodiment, there is provided a secondary battery including a positive electrode, a negative electrode, and an aqueous electrolyte. The negative electrode contains a titanium-containing oxide. The aqueous electrolyte contains a solvent and alkali metal ions or alkaline earth metal ions, the solvent containing water and a water-soluble organic solvent. An interfacial tension of the aqueous electrolyte is 37 mN/m or less.Type: GrantFiled: March 12, 2019Date of Patent: December 15, 2020Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Yumiko Sekiguchi, Hayato Seki, Shinsuke Matsuno, Norio Takami
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Publication number: 20200303783Abstract: A secondary battery includes a positive electrode, a negative electrode and an electrolyte containing aqueous electrolyte. The negative electrode is provided with a negative electrode current collector having a compound including aluminum, and a negative electrode active material including titanium on a granule surface of the negative electrode current collector. A ratio of an atomic concentration of aluminum atoms to sum of atomic concentrations of aluminum atoms and titanium atoms on a surface of the negative electrode ({Al atomic concentration/(Al atomic concentration+Ti atomic concentration)}×100) is 3 atm % or more and 30 atm % or less.Type: ApplicationFiled: December 18, 2019Publication date: September 24, 2020Applicant: Kabushiki Kaisha ToshibaInventors: Yumiko SEKIGUCHI, Shinsuke MATSUNO, Norio TAKAMI
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Patent number: 10756349Abstract: According to one embodiment, provided is a secondary battery including an aqueous electrolyte, a positive electrode, and a negative electrode. A compound containing an element A is present on at least a part of the surface of the negative electrode. The element A is at least one selected from the group consisting of Hg, Pb, Zn, and Bi. According to scanning electron microscopy, a region where the compound containing the element A is present accounts for 50% of more of the surface of the negative electrode.Type: GrantFiled: August 31, 2018Date of Patent: August 25, 2020Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Hayato Seki, Yumiko Sekiguchi, Kazuomi Yoshima, Yasuyuki Hotta, Shinsuke Matsuno, Norio Takami
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Publication number: 20190296400Abstract: According to one embodiment, there is provided a secondary battery including a positive electrode, a negative electrode, and an aqueous electrolyte. The negative electrode contains a titanium-containing oxide. The aqueous electrolyte contains a solvent and alkali metal ions or alkaline earth metal ions, the solvent containing water and a water-soluble organic solvent. An interfacial tension of the aqueous electrolyte is 37 mN/m or less.Type: ApplicationFiled: March 12, 2019Publication date: September 26, 2019Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yumiko Sekiguchi, Hayato Seki, Shinsuke Matsuno, Norio Takami
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Publication number: 20190296344Abstract: According to one embodiment, provided is a secondary battery including an aqueous electrolyte, a positive electrode, and a negative electrode, where the negative electrode includes a negative electrode active material containing a Ti-containing composite oxide. At least one element A selected from the group consisting of Hg, Pb, Zn, and Bi is present on a surface of the negative electrode. An average of molar ratios (A/(A+Ti)) of the element A is more than or equal to 5% and less than or equal to 40%. Each of the molar ratios is a molar amount of the element A to a sum between the molar amount of the element A and a molar amount of Ti on the surface of the negative electrode, according to scanning electron microscopy-energy dispersive X-ray spectroscopy.Type: ApplicationFiled: August 31, 2018Publication date: September 26, 2019Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Hayato SEKI, Yumiko SEKIGUCHI, Kazuomi YOSHIMA, Yasuyuki HOTTA, Shinsuke MATSUNO, Norio TAKAMI
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Publication number: 20190296357Abstract: According to one embodiment, provided is a secondary battery including an aqueous electrolyte, a positive electrode, and a negative electrode. A compound containing an element A is present on at least a part of the surface of the negative electrode. The element A is at least one selected from the group consisting of Hg, Pb, Zn, and Bi.Type: ApplicationFiled: August 31, 2018Publication date: September 26, 2019Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Hayato SEKI, Yumiko SEKIGUCHI, Kazuomi YOSHIMA, Yasuyuki HOTTA, Shinsuke MATSUNO, Norio TAKAMI
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Publication number: 20190088999Abstract: According to one embodiment, a secondary battery is provided. The secondary battery includes a positive electrode, a negative electrode, and an aqueous electrolyte containing alkali metal ions. The aqueous electrolyte contains an organic compound containing a carboxyl group or carboxylate group and a hydroxyl group. The pH of the aqueous electrolyte is 0 or less. The ratio of the weight of the organic compound to the weight of the aqueous electrolyte is within a range of 0.01% by weight to 6.5% by weight. The number of carbon atoms in the organic compound is 5 or more.Type: ApplicationFiled: March 5, 2018Publication date: March 21, 2019Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yumiko SEKIGUCHI, Shinsuke MATSUNO, Hayato SEKI
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Publication number: 20160023923Abstract: An iodine adsorbent of an embodiment has a support, a first organic group bonded to the support and has a functional group containing nitrogen at least at a terminal, and silver bonded to the nitrogen-containing functional group.Type: ApplicationFiled: July 14, 2015Publication date: January 28, 2016Applicant: Kabushiki Kaisha ToshibaInventors: Tomohito IDE, Yumiko SEKIGUCHI, Toshihiro IMADA