Patents by Inventor Sadanori Hattori
Sadanori Hattori 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: 20220326094Abstract: A heat-flow sensor that includes an insulating layer, a magnetic field application layer arranged on a first surface of the insulating layer and composed of a conductor, and a heat-flow detection layer arranged on a second surface of the insulating layer, the second surface facing the first surface, and the heat-flow detection layer composed of a conductive magnetic body. The heat-flow detection layer faces the magnetic field application layer via the insulating layer.Type: ApplicationFiled: September 25, 2019Publication date: October 13, 2022Applicant: NEC CorporationInventors: Akihiro KIRIHARA, Masahiko ISHIDA, Yuma IWASAKI, Yasutomo OMORI, Hiroko SOMEYA, Sadanori HATTORI
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Publication number: 20210066567Abstract: A magnetic alloy material according to the present disclosure is an iron-aluminum-terbium based magnetic alloy material containing a total of 70 atomic percent or more of three elements of iron, aluminum, and terbium.Type: ApplicationFiled: August 31, 2020Publication date: March 4, 2021Applicant: NEC CORPORATIONInventors: Yasutomo OMORI, Akihiro KIRIHARA, Yuma IWASAKI, Masahiko ISHIDA, Koichi TERASHIMA, Hiroko SOMEYA, Sadanori HATTORI
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Patent number: 10847788Abstract: There is provided a lithium-iron-manganese-based composite oxide capable of providing a lithium-ion secondary battery which has a high capacity retention rate in charge/discharge cycles and in which the generation of a gas caused by charge/discharge cycles is suppressed. A lithium-iron-manganese-based composite oxide having a layered rock-salt structure, wherein at least a part of the surface of a lithium-iron-manganese-based composite oxide represented by the following formula is coated with an oxide of at least one metal selected from the group consisting of La, Pr, Nd, Sm and Eu: LixM1(y-p)MnpM2(z-q)FeqO(2-?) wherein 1.05?x?1.32, 0.33?y?0.63, 0.06?z?0.50, 0<p?0.63, 0.06?q?0.50, 0???0.80, y?p, and z?q; M1 is at least one element selected from Ti and Zr; and M2 is at least one element selected from the group consisting of Co, Ni and Mn.Type: GrantFiled: February 9, 2016Date of Patent: November 24, 2020Assignees: NEC Corporation, Tanaka Chemical CorporationInventors: Ryota Yuge, Noriyuki Tamura, Sadanori Hattori, Mitsuharu Tabuchi, Kentaro Kuratani, Kyousuke Doumae, Hideka Shibuya
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Patent number: 10833369Abstract: An object of the present invention is to provide a positive electrode active substance capable of suppressing gas generation associated with charge and discharge in a lithium secondary battery, and capable of suppressing gas generation associated with charge and discharge particularly even in cases where the use voltage of the lithium secondary battery is high, a positive electrode and a lithium secondary battery using the positive electrode active substance, and methods for producing these. The present invention is a positive electrode active substance for a lithium secondary battery, comprising a coated positive electrode active substance wherein a surface of a positive electrode active substance is directly coated with lithium metaphosphate.Type: GrantFiled: October 31, 2016Date of Patent: November 10, 2020Assignee: NEC CORPORATIONInventors: Katsumi Maeda, Sadanori Hattori
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Publication number: 20200321588Abstract: Provided is a stacked secondary battery with which it is possible to prevent the phenomenon of gas generated by an electrode material or the like inside a cell accumulating between an electrode and a separator, and forming bubbles that cannot readily escape, and with which safety performance at high temperatures can be enhanced. A stacked secondary battery in which a positive electrode and a negative electrode are stacked with a bag-like separator interposed therebetween, wherein one of the positive electrode and the negative electrode is accommodated in the bag-like separator, the other of the positive electrode and the negative electrode is stacked on the bag-like separator accommodating said one electrode, and the bag-like separator has a uniaxial contraction characteristic at high temperatures and has a slit formed in a contraction direction along which the contraction coefficient of the bag-like separator is large.Type: ApplicationFiled: May 19, 2017Publication date: October 8, 2020Applicant: NEC CORPORATIONInventors: Kaoru NARITA, Noriyuki TAMURA, Sadanori HATTORI
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Patent number: 10637054Abstract: The present invention relates to a lithium manganese composite oxide having a metal-containing compound film and a carbon coating, in which at least a part of a surface of the lithium manganese composite oxide represented by Formula (1) is coated with the metal-containing compound film, and at least a part of the surface thereof is further coated with the carbon coating. The present invention can provide a positive electrode material capable of improving the discharge characteristics and the capacity retention rate after cycles of lithium ion secondary batteries. Li1+x(FeyNizMn1?y?z)1?xO2??(1), where 0<x<?, 0?y, 0?z<0.5, and y+z<1.Type: GrantFiled: June 5, 2014Date of Patent: April 28, 2020Assignee: NEC CorporationInventors: Ryota Yuge, Kentaro Nakahara, Sadanori Hattori
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Patent number: 10622678Abstract: In terms of a lithium ion secondary battery using, in a positive electrode, a lithium transition metal composite oxide containing an over-stoichiometric amount of lithium, a lithium ion secondary battery in which an amount of a gas generated during charge/discharge cycles is reduced and capacity retention is improved is provided. The lithium ion secondary battery includes a positive electrode containing a lithium transition metal composite oxide containing Fe and containing an over-stoichiometric amount of lithium, and a nonaqueous electrolyte solution, and the nonaqueous electrolyte solution contains a nonaqueous organic solvent, an electrolyte, and lithium difluorophosphate.Type: GrantFiled: June 23, 2016Date of Patent: April 14, 2020Assignee: NEC CORPORATIONInventors: Katsumi Maeda, Noriyuki Tamura, Sadanori Hattori
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Publication number: 20190027741Abstract: Provided are a positive electrode active material capable of inhibiting generation of gases accompanied by charging/discharging, a positive electrode and a lithium secondary cell using the positive electrode active material, and methods for manufacturing the positive electrode active material, the positive electrode, and the lithium secondary cell. The positive electrode active material comprises a coated positive electrode active material having a coating comprising at least one selected from specific phosphonic esters and specific phosphorous triesters.Type: ApplicationFiled: December 19, 2016Publication date: January 24, 2019Applicant: NEC CORPORATIONInventors: Katsumi MAEDA, Sadanori HATTORI
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Patent number: 10164250Abstract: There is provided a lithium-iron-manganese-based composite oxide capable of providing a lithium-ion secondary battery which has a high capacity retention rate in charge/discharge cycles and in which the generation of a gas caused by charge/discharge cycles is reduced. A lithium-iron-manganese-based composite oxide having a layered rock-salt structure, wherein at least a part of the surface of a lithium-iron-manganese-based composite oxide represented by the following formula (1) is coated with an inorganic material: LixM1(y-p)MnpM2(z-p)FeqO(2-?) (1) (wherein 1.05?x?1.32, 0.33?y?0.63, 0.06?z?0.50, 0<p?0.63, 0.06?q?0.50, 0???0.80, y?p, and z?q; M1 is at least one element selected from Ti and Zr; and M2 is at least one element selected from the group consisting of Co, Ni and Mn).Type: GrantFiled: August 19, 2014Date of Patent: December 25, 2018Assignees: NEC Corporation, Tanaka Chemical CorporationInventors: Kentaro Nakahara, Ryota Yuge, Noriyuki Tamura, Sadanori Hattori, Kentaro Kuratani, Kyousuke Doumae, Hideka Shibuya, Mitsuharu Tabuchi
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Publication number: 20180351199Abstract: An object of the present invention is to provide a positive electrode active substance capable of suppressing gas generation associated with charge and discharge in a lithium secondary battery, and capable of suppressing gas generation associated with charge and discharge particularly even in cases where the use voltage of the lithium secondary battery is high, a positive electrode and a lithium secondary battery using the positive electrode active substance, and methods for producing these. The present invention is a positive electrode active substance for a lithium secondary battery, comprising a coated positive electrode active substance wherein a surface of a positive electrode active substance is directly coated with lithium metaphosphate.Type: ApplicationFiled: October 31, 2016Publication date: December 6, 2018Applicant: NEC CORPORATIONInventors: Katsumi MAEDA, Sadanori HATTORI
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Patent number: 10128538Abstract: The present invention provides a non-aqueous electrolytic solution comprising a phosphinoamine-based compound represented by formula (1) below and a lithium ion secondary battery comprising the non-aqueous electrolytic solution. By adding the phosphinoamine-based compound to the non-aqueous electrolytic solution, oxidative degradation in the non-aqueous electrolytic solution is suppressed, and thus gas generation is suppressed.Type: GrantFiled: June 11, 2015Date of Patent: November 13, 2018Assignee: NEC CorporationInventors: Shizuka Sato, Katsumi Maeda, Noriyuki Tamura, Sadanori Hattori
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Publication number: 20180183099Abstract: The present invention provides a non-aqueous electrolytic solution comprising a phosphinoamine-based compound represented by formula (1) below and a lithium ion secondary battery comprising the non-aqueous electrolytic solution. By adding the phosphinoamine-based compound to the non-aqueous electrolytic solution, oxidative degradation in the non-aqueous electrolytic solution is suppressed, and thus gas generation is suppressed.Type: ApplicationFiled: June 11, 2015Publication date: June 28, 2018Applicant: NEC CorporationInventors: Shizuka SATO, Katsumi MAEDA, Noriyuki TAMURA, Sadanori HATTORI
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Publication number: 20180145371Abstract: In terms of a lithium ion secondary battery using, in a positive electrode, a lithium transition metal composite oxide containing an over-stoichiometric amount of lithium, a lithium ion secondary battery in which an amount of a gas generated during charge/discharge cycles is reduced and capacity retention is improved is provided. The lithium ion secondary battery includes a positive electrode containing a lithium transition metal composite oxide containing Fe and containing an over-stoichiometric amount of lithium, and a nonaqueous electrolyte solution, and the nonaqueous electrolyte solution contains a nonaqueous organic solvent, an electrolyte, and lithium difluorophosphate.Type: ApplicationFiled: June 23, 2016Publication date: May 24, 2018Applicant: NEC CORPORATIONInventors: Katsumi MAEDA, Noriyuki TAMURA, Sadanori HATTORI
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Publication number: 20180069236Abstract: There is provided a lithium-iron-manganese-based composite oxide capable of providing a lithium-ion secondary battery which has a high capacity retention rate in charge/discharge cycles and in which the generation of a gas caused by charge/discharge cycles is suppressed. A lithium-iron-manganese-based composite oxide having a layered rock-salt structure, wherein at least a part of the surface of a lithium-iron-manganese-based composite oxide represented by the following formula is coated with an oxide of at least one metal selected from the group consisting of La, Pr, Nd, Sm and Eu: LixM1(y-p)MnpM2(z-q)FeqO(2-?) wherein 1.05?x?1.32, 0.33?y?0.63, 0.06?z?0.50, 0<p?0.63, 0.06?q?0.50, 0???0.80, y?p, and z?q; M1 is at least one element selected from Ti and Zr; and M2 is at least one element selected from the group consisting of Co, Ni and Mn.Type: ApplicationFiled: February 9, 2016Publication date: March 8, 2018Applicants: NEC Corporation, Tanaka Chemical CorporationInventors: Ryota YUGE, Noriyuki TAMURA, Sadanori HATTORI, Mitsuharu TABUCHI, Kentaro KURATANI, Kyousuke DOUMAE, Hideka SHIBUYA
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Patent number: 9865872Abstract: The present invention relates to a lithium-ion battery. The lithium-ion battery comprises a positive electrode containing, as a principal component, a lithium oxide having a layered rock-salt structure and represented by chemical formula: LixM1yM2zO2-d. In this chemical formula, 1.16?x?1.32, 0.33?y?0.63, 0.06?z?0.50, M1 represents a metal ion selected from Mn, Ti and Zr, or a mixture thereof, and M2 represents a metal ion selected from Fe, Co, Ni and Mn, or a mixture thereof. The lithium-ion battery also comprises a negative electrode containing, as a principal component, a material capable of intercalating/deintercalating lithium ions, wherein peroxide ion(s) (O22?) are contained in the positive electrode.Type: GrantFiled: February 1, 2013Date of Patent: January 9, 2018Assignee: NEC CorporationInventors: Kentaro Nakahara, Sadanori Hattori
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Publication number: 20170271712Abstract: A positive electrode active material for a lithium ion secondary battery that can suppress gas generation and that can provide a lithium ion secondary battery having a high capacity retention ratio in charge-discharge cycles is provided. The positive electrode active material for a lithium ion secondary battery according to the present exemplary embodiment includes a compound having a layered rock salt structure and represented by LixFesM1(z-s)M2yO? (wherein 1.05?x?1.90, 0.05?s?0.50, 0.05?z?0.50, 0.33?y?0.90, 1.20???3.10 and z?s?0; M1 is at least one element selected from the group consisting of Co and Ni; and M2 is at least one element selected from the group consisting of Mn, Ti and Zr) and a specific 1,3-propanedione derivative.Type: ApplicationFiled: September 17, 2015Publication date: September 21, 2017Applicant: NEC CorporationInventors: Katsumi MAEDA, Sadanori HATTORI, Noriyuki TAMURA
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Publication number: 20160218360Abstract: There is provided a lithium-iron-manganese-based composite oxide capable of providing a lithium-ion secondary battery which has a high capacity retention rate in charge/discharge cycles and in which the generation of a gas caused by charge/discharge cycles is reduced. A lithium-iron-manganese-based composite oxide having a layered rock-salt structure, wherein at least a part of the surface of a lithium-iron-manganese-based composite oxide represented by the following formula (1) is coated with an inorganic material: LixM1(y-p)MnpM2(z-p)FeqO(2-?) (1) (wherein 1.05?x?1.32, 0.33?y?0.63, 0.06?z?0.50, 0<p?0.63, 0.06?q?0.50, 0???0.80, y?p, and z?q; M1 is at least one element selected from Ti and Zr; and M2 is at least one element selected from the group consisting of Co, Ni and Mn).Type: ApplicationFiled: August 19, 2014Publication date: July 28, 2016Applicants: NEC Corporation, Tanaka Chemical CorporationInventors: Kentaro NAKAHARA, Ryota YUGE, Noriyuki TAMURA, Sadanori HATTORI, Kentaro KURATANI, Kyousuke DOUMAE, Hideka SHIBUYA, Mitsuharu TABUCHI
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Publication number: 20160126549Abstract: The present invention relates to a lithium manganese composite oxide having a metal-containing compound film and a carbon coating, in which at least a part of a surface of the lithium manganese composite oxide represented by Formula (1) is coated with the metal-containing compound film, and at least a part of the surface thereof is further coated with the carbon coating. The present invention can provide a positive electrode material capable of improving the discharge characteristics and the capacity retention rate after cycles of lithium ion secondary batteries. Li1+x(FeyNizMn1-y-z)1-xO2??(1), where 0<x<?, 0?y, 0?z<0.5, and y+z<1.Type: ApplicationFiled: June 5, 2014Publication date: May 5, 2016Applicant: NEC CorporationInventors: Ryota YUGE, Kentaro NAKAHARA, Sadanori HATTORI
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Publication number: 20150194671Abstract: The present invention relates to a lithium-ion battery comprising a positive electrode containing, as a principal component, a lithium oxide having a layered rock-salt structure and represented by chemical formula: LixM1yM2zO2-d, wherein 1.16?x?1.32, 0.33?y?0.63, 0.06?z?0.50, M1 represents a metal ion selected from Mn, Ti and Zr, or a mixture thereof, and M2 represents a metal ion selected from Fe, Co, Ni and Mn, or a mixture thereof; and a negative electrode containing, as a principal component, a material capable of intercalating/deintercalating lithium ions, wherein peroxide ion(s) (O22?) are contained in the positive electrode.Type: ApplicationFiled: February 1, 2013Publication date: July 9, 2015Applicant: NEC CorporationInventors: Kentaro Nakahara, Sadanori Hattori
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Publication number: 20150010822Abstract: The present invention relates to a lithium-ion battery comprising a positive electrode containing, as a principal component, a lithium oxide having a layered rock-salt structure and represented by chemical formula: LixM1yM2zO2-d, wherein 1.16?x?1.32, 0.33?y?0.63, 0.06?z?0.50, M1 represents a metal ion selected from Mn, Ti and Zr, or a mixture thereof, and M2 represents a metal ion selected from Fe, Co, Ni and Mn, or a mixture thereof; and a negative electrode containing, as a principal component, a material capable of intercalating/deintercalating lithium ions, wherein an oxygen deficiency (d) of the positive electrode is not less than 0.05 and not more than 0.20.Type: ApplicationFiled: February 1, 2013Publication date: January 8, 2015Inventors: Kentaro Nakahara, Sadanori Hattori