Patents by Inventor Norio Takami
Norio Takami 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: 11462730Abstract: According to one embodiment, an electrode is provided. The active material-containing layer includes an active material, inorganic solid particles having lithium ion conductivity, and carbon fiber. A pore diameter DM at the first peak is 0.05 ?m to 10 ?m. A value SA?SB is 1.4 or more in a slope distribution curve of the active material-containing layer, where a vertical axis of the slope distribution curve represents a slope of a straight line passing through two adjacent measurement points on the log differential pore volume distribution curve and a horizontal axis of the slope distribution curve represents a smaller pore diameter of the two adjacent measurement points. The value SA?SB is obtained by subtracting a minimum slope value SB from a maximum slope value SA.Type: GrantFiled: February 28, 2020Date of Patent: October 4, 2022Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tomoe Kusama, Tetsuya Sasakawa, Kazuomi Yoshima, Tomoko Sugizaki, Wen Zhang, Yasuhiro Harada, Norio Takami
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Patent number: 11456462Abstract: According to one embodiment, an electrode is provided. The electrode includes a current collector, a first layer formed on the current collector, and a second layer formed on at least part of the first layer. The first layer contains a monoclinic niobium titanium composite oxide. The second layer contains lithium titanate having a spinel structure. A porosity P2 of the second layer is within a range from 30% to 80%.Type: GrantFiled: February 11, 2020Date of Patent: September 27, 2022Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tomoko Sugizaki, Tetsuya Sasakawa, Kazuomi Yoshima, Tomoe Kusama, Yasuhiro Harada, Norio Takami
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Patent number: 11456449Abstract: An electrode for a secondary battery comprises a current collector; and an active material-containing layer has active materials which comprise titanium-containing composite oxide having an orthorhombic crystal structure and represented by a general formula Li2+aM12?bTi6?cM2dO14+?; wherein the active material-containing layer has intensity ratio Ia/Ib in an X-ray diffraction pattern of the active material-containing layer, the Ia and the Ib are obtained by powder X-ray diffraction method using Cu-K? ray, the intensity ratio is within a range of 0.5?Ia/Ib?2, the Ia is the strongest intensity of a diffraction peak among diffraction peaks appearing within a range of 42°?2??44°, and the Ib is the strongest intensity of a diffraction peak among diffraction peaks appearing within a range of 44°<2??48°.Type: GrantFiled: July 26, 2019Date of Patent: September 27, 2022Assignees: Kabushiki Kaisha Toshiba, Toshiba Infrastructure Systems & Solutions CorporationInventors: Tetsuya Sasakawa, Wen Zhang, Yasuhiro Harada, Norio Takami
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Publication number: 20220302445Abstract: According to one embodiment, provided is an active material including a composite oxide having a tetragonal crystal structure. The composite oxide is represented by general formula LiaTibNb2?2dMc+2dO2b+5+3c. Here, M is one selected from the group consisting of W and Mo, 0?a?b+4+3c, 0<b<2?2d, and 0<c<2?4d.Type: ApplicationFiled: August 31, 2021Publication date: September 22, 2022Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Kazuki ISE, Hirofumi YASUMIISHI, Keigo HOSHINA, Yasuhiro HARADA, Norio TAKAMI
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Publication number: 20220302502Abstract: According to one embodiment, a secondary battery includes a positive electrode, a negative electrode, a separator layer, and a nonaqueous electrolytic solution. The separator layer includes a first porous layer containing a solid electrolyte and a second porous layer containing fibers. The second porous layer is in contact with a first surface of the first porous layer. The nonaqueous electrolytic solution includes a first solvent including at least one of methyl propionate and ethyl propionate, and a second solvent different from the first solvent. The first porous layer has a void fraction of 10% by volume or greater and 50% by volume or less. The second porous layer has a void fraction greater than the void fraction of the first porous layer.Type: ApplicationFiled: August 31, 2021Publication date: September 22, 2022Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tetsuya SASAKAWA, Tomoe KUSAMA, Tomoko SUGIZAKI, Kazuomi YOSHIMA, Norio TAKAMI
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Publication number: 20220302448Abstract: According to one embodiment, provided is an electrode including an active material-containing layer, which includes a titanium-niobium composite oxide, a fibrous carbon material, and one or more thickener selected from the group consisting of carboxymethyl cellulose, carboxymethyl cellulose salts, and polyvinyl pyrrolidone. In a particle size distribution of particles in the active material-containing layer, an average particle size D50 is from 1.6 ?m to 3.0 ?m, a particle size D10 is 1 ?m or less, and a particle size D90 is 10 ?m or more. The particle size distribution includes a first peak having a maximum peak intensity IMAX corresponding to a maximum frequency and a second peak positioned at 10 ?m or more. The second peak has a peak intensity I2nd of 0.25 IMAX to 0.7 IMAX.Type: ApplicationFiled: August 30, 2021Publication date: September 22, 2022Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Keigo HOSHINA, Yasunobu YAMASHITA, Yasuhiro HARADA, Norio TAKAMI
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Publication number: 20220302431Abstract: According to one embodiment, an electrode is provided. The electrode includes an active material-containing layer and a current collector. The active material-containing layer comprises a first edge having an arc shape and a second edge positioned opposite to the first edge. The current collector comprises an active material-supporting section supporting the active material-containing layer, and an active material-non-supporting section. The curving amount is represented by a maximum distance from the first edge to a reference line connecting two points on the first edge. The curving amount is in a range of ?1 mm or more and less than 0 mm.Type: ApplicationFiled: August 31, 2021Publication date: September 22, 2022Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yuta KANAI, Yasunobu YAMASHITA, Kazuomi YOSHIMA, Keigo HOSHINA, Tetsuya SASAKAWA, Yasuhiro HARADA, Norio TAKAMI
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Publication number: 20220293926Abstract: According to one embodiment, an active material is provided. The active material includes an Nb2TiO7 phase and at least one Nb-rich phase selected from the group consisting of an Nb10Ti2O29 phase, an Nb14TiO37 phase, and an Nb24TiO64 phase. The active material includes potassium and phosphorus, and a total concentration of potassium and phosphorus in the active material is in the range of 0.01% by mass to 5.00% by mass. An average crystallite diameter is in the range of 80 nm to 150 nm. In a particle size distribution chart obtained by a laser diffraction scattering method, D10 is 0.3 ?m or greater, and D90 is 10 ?m or less. The active material satisfies a peak intensity ratio represented by the following Formula (1). 0<IB/IA0.Type: ApplicationFiled: August 23, 2021Publication date: September 15, 2022Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yasuhiro HARADA, Yorikazu YOSHIDA, Kakuya UEDA, Norio TAKAMI
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Publication number: 20220294077Abstract: An electrode group includes a negative electrode, a positive electrode and a separator. The negative electrode includes a negative electrode active material-containing layer and a mesh negative electrode current collector. The positive electrode includes a positive electrode active material-containing layer. The separator includes a composite membrane containing inorganic solid particles and a polymer material. At least one of a first polymer material constituting the negative electrode active material-containing layer is the same as a second polymer material. A ratio a/b of denseness a and denseness b is greater than 1.05. A peeling strength ?1 is greater than a peeling strength ?2. An air permeability coefficient of a joined body of the composite membrane and the negative electrode is 1×10?19 m2 or more and 1×10?15 m2 or less.Type: ApplicationFiled: September 3, 2021Publication date: September 15, 2022Applicant: Kabushiki Kaisha ToshibaInventors: Yasuyuki HOTTA, Takashi KUBOKI, Shinsuke MATSUNO, Norio TAKAMI
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Publication number: 20220293915Abstract: According to an embodiment, an electrode group is provided. The electrode group includes a positive electrode, and a negative electrode. The negative electrode active material-containing layer includes a facing section which faces the positive electrode active material-containing layer and a non-facing section which does not. A first fluorine-containing coating is formed on a main surface of the negative electrode active material-containing layer in at least a part of the non-facing section. The abundance ratio of fluorine atoms included in the first fluorine-containing coating is in the range of 2.5 atom % to 10 atom %.Type: ApplicationFiled: August 31, 2021Publication date: September 15, 2022Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yasunobu YAMASHITA, Tetsuya SASAKAWA, Yasuhiro HARADA, Norio TAKAMI, Shinsuke MATSUNO
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Patent number: 11430985Abstract: According to one embodiment, an electrode is provided. A length of a first active material portion along a first direction is within a range of 0.7T or more and 0.95T or less with respect to a thickness T of an active material-containing layer. The first direction is parallel to a thickness direction. A second active material portion further contains solid electrolyte particles. A ratio E1/E2 is 0 or more and 0.01 or less. The ratio E1/E2 represents a ratio of a content E1 of the solid electrolyte particles per unit area in the first active material portion (including 0) to a content E2 of the solid electrolyte particles per unit area in the second active material portion.Type: GrantFiled: September 10, 2019Date of Patent: August 30, 2022Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Keigo Hoshina, Kazuomi Yoshima, Tomoko Sugizaki, Tomoe Kusama, Tetsuya Sasakawa, Yasuhiro Harada, Norio Takami
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Patent number: 11431035Abstract: In one embodiment, a secondary battery is provided, which includes an electrolytic solution, and a positive electrode and a negative electrode which are immersed in the electrolytic solution. The electrolytic solution contains water, an electrolyte salt, and at least one kind of an organic solvent with a relative permittivity of not more than 42. The relative permittivity of the electrolytic solution fractionated when converted according to a volume fraction is not more than 78.50.Type: GrantFiled: February 16, 2018Date of Patent: August 30, 2022Assignee: Kabushiki Kaisha ToshibaInventors: Yasuyuki Hotta, Shinsuke Matsuno, Hayato Seki, Norio Takami
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Publication number: 20220255133Abstract: According to one embodiment, a nonaqueous electrolyte including an ionic liquid is provided. The ionic liquid includes: a cation including trialkyl sulfonium ions and lithium ions; a first anion of [N(FSO2)2]?; and a second anion including one or more selected from the group consisting of [N(CF3SO2)2]?, [N(FSO2)(CF3SO2)]?, [N(FSO2)(C2F5SO2)]?, [N(FSO2)(n-C4F9SO2)]?, PF6?, and BF4?. A molar ratio between the first anion and the second anion is in the range of 1:4 to 4:1. A molar ratio between the lithium ions and the trialkyl sulfonium ions is in the range of 1:4 to 4:1.Type: ApplicationFiled: August 20, 2021Publication date: August 11, 2022Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Norio Takami, Tomoko Sugizaki
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Patent number: 11394050Abstract: According to one embodiment, provided is a nonaqueous electrolyte battery including a positive electrode, a negative electrode, and a nonaqueous electrolyte. The negative electrode contains a negative electrode active material containing orthorhombic Na-containing niobium-titanium composite oxide particles represented by general formula (1) Li2+vNa2?yM1xTi6?y?zNbyM2zO14+?. In general formula (1), M1 is one or two or more elements selected from the group consisting of Cs, K, Sr, Ba, and Ca, M2 is one or two or more elements selected from the group consisting of Zr, Al, Sn, V, Ta, Mo, W, Fe, Co, and Mn, 0?v<2, 0?x<2, 0<y<2, 0?z<3, and ?0.5???0.5. The nonaqueous electrolyte contains an Na component in a range of 10 ppm by mass to 3,000 ppm by mass.Type: GrantFiled: January 25, 2019Date of Patent: July 19, 2022Assignees: KABUSHIKI KAISHA TOSHIBA, Toshiba Infrastructure Systems & Solutions CorporationInventors: Dai Yamamoto, Keigo Hoshina, Ryo Hara, Norio Takami, Yasuhiro Harada
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Patent number: 11380885Abstract: According to one embodiment, an electrode is provided. The electrode includes an active material-containing layer. The active material-containing layer includes: an active material including a titanium-containing composite oxide; inorganic solid particles having lithium ion conductivity; and carbon fiber. The active material-containing layer has a first peak indicating a maximum log differential pore volume in a log differential pore volume distribution curve according to mercury porosimetry. A pore diameter PD at the first peak is 0.01 ?m to 0.1 ?m. The first peak has a full width at half maximum of 0.05 ?m or less.Type: GrantFiled: February 28, 2020Date of Patent: July 5, 2022Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Tomoe Kusama, Tetsuya Sasakawa, Kazuomi Yoshima, Tomoko Sugizaki, Wen Zhang, Yasuhiro Harada, Norio Takami
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Patent number: 11367897Abstract: According to one embodiment, provided is a solid electrolyte material including an oxide, the oxide including an octahedral coordination structure that includes a metal element M and oxygen atoms arranged centering on the metal element M. The metal element M includes Nb and Ta. Amass ratio ?Ta/?Nb of a mass ?Ta of Ta to a mass ?Nb of Nb is within a range of 5×10?5??Ta/?Nb?3×10?3.Type: GrantFiled: September 9, 2019Date of Patent: June 21, 2022Assignee: Kabushiki Kaisha ToshibaInventors: Yasuhiro Harada, Tomoe Kusama, Norio Takami, Kazuomi Yoshima
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Patent number: 11362366Abstract: The present invention is provided to reduce the influence of expansion and contraction of an active material, form a favorable interface between the solid electrolyte and the active material, and increase ion conductivity in the electrolyte, thereby obtaining a wide operation temperature range. A secondary battery composite electrolyte includes an inorganic compound having an Li ion conductivity at room temperature that is 1×10?10 S/cm or more and having particle diameter of 0.05 ?m or more and less than 8 ?m, and an organic electrolyte. The weight ratio between the organic electrolyte and the inorganic compound is 0.1% or more and 20% or less.Type: GrantFiled: August 28, 2017Date of Patent: June 14, 2022Assignee: Kabushiki Kaisha ToshibaInventors: Kazuomi Yoshima, Yasuhiro Harada, Norio Takami
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Publication number: 20220149363Abstract: According to a storage battery of an embodiment includes a first battery module and a second battery module connected in parallel with the first battery module. The number of first cells connected in series in the first battery module is M, and the number of second cells connected in series in the second battery module is N. When an open circuit voltage at SOC=X % of the first cells and the second cells are Va1 (X) and Va2 (X), respectively, the voltages of the battery modules are M×Va1 (X)<N×Va2 (X) in the range where the SOC of the cell is 0% to 30%, and M×Va1 (X)>N×Va2 (X) in the range where the SOC of the cell is 70% to 100%.Type: ApplicationFiled: January 20, 2022Publication date: May 12, 2022Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Ryosuke Yagi, Yasuhiro Harada, Norio Takami, Tetsuya Sasakawa, Norihiro Yoshinaga, Yuta Kanai
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Patent number: 11329316Abstract: The present invention is provided to reduce the influence of expansion and contraction of an active material, form a favorable interface between a solid electrolyte and an active material, and improve the high temperature durability and cycle lifespan of a battery. A secondary battery composite electrolyte includes an inorganic compound having an Li ion conductivity at 25° C. that is less than 1×10?10 S/cm and an organic electrolyte. The weight ratio between the organic electrolyte and the inorganic compound is 0.1% or more and 20% or less.Type: GrantFiled: August 28, 2017Date of Patent: May 10, 2022Assignee: Kabushiki Kaisha ToshibaInventors: Yasuhiro Harada, Norio Takami, Kazuomi Yoshima
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Patent number: 11322742Abstract: According to one embodiment, provided is an active material including monoclinic niobium titanium composite oxide particles, and carbon fibers with which at least a part of surfaces of the monoclinic niobium titanium composite oxide particles is covered. The monoclinic niobium titanium composite oxide particles satisfy 1.5?(?/?)?2.5. The monoclinic niobium titanium composite oxide particles have an average primary particle size of 0.05 ?m to 2 ?m. The carbon fibers contain one or more metal elements selected from the group consisting of Fe, Co and Ni, and satisfy 1/10000?(?/?)? 1/100. The carbon fibers have an average fiber diameter in the range of 5 nm to 100 nm.Type: GrantFiled: September 5, 2019Date of Patent: May 3, 2022Assignee: KABUSHIKI KAISHA TOSHIBAInventors: Norio Takami, Keigo Hoshina, Mitsuru Ishibashi, Yoshihiko Nakano, Yasuhiro Harada