Patents by Inventor Takeo Tsukada
Takeo Tsukada 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: 20230126501Abstract: An all-solid-state battery having a positive electrode layer including a positive electrode current collector layer and a positive electrode active material layer, a negative electrode layer including a negative electrode current collector layer and a negative electrode active material layer, and a solid electrolyte layer containing a solid electrolyte, and the positive electrode active material layer and the negative electrode active material layer each contain carbon particles having an average interplanar spacing d002 of smaller than 0.342 (nm).Type: ApplicationFiled: January 6, 2021Publication date: April 27, 2023Applicant: TDK CORPORATIONInventor: Takeo TSUKADA
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Patent number: 11631850Abstract: An objective of the present invention is to provide an all-solid-state battery with a high discharge capacity in which lithium vanadium phosphate is used as a positive electrode active material layer and a negative electrode active material layer. According to the present invention, the positive electrode active material layer and the negative electrode active material layer of the all-solid-state battery having an all-solid-state electrolyte between a pair of electrodes contain the lithium vanadium phosphate, the lithium vanadium phosphate contains a polyphosphate compound containing Li and V, and the lithium vanadium phosphate contains Li3V2(PO4)3 as a main phase and contains 1.0% by weight or more and 15.0% by weight or less of Li3PO4 relative to Li3V2(PO4)3, whereby a high discharge capacity can be provided.Type: GrantFiled: March 28, 2018Date of Patent: April 18, 2023Assignee: TDK CORPORATIONInventor: Takeo Tsukada
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Publication number: 20220416242Abstract: An all-solid-state battery includes an electrode layer, a solid electrolyte layer, an intermediate layer provided at least in a part between the electrode layer and the solid electrolyte layer, the electrode layer includes a current collector layer and an active material layer, the active material layer includes an active material and a carbon material, the intermediate layer has ionic conductivity, the carbon content in the intermediate layer is less than the carbon content in the active material layer.Type: ApplicationFiled: October 30, 2020Publication date: December 29, 2022Applicant: TDK CORPORATIONInventors: Teiichi TANAKA, Takeo TSUKADA
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Publication number: 20220367846Abstract: An all-solid-state battery includes a positive electrode layer, a negative electrode layer, and a solid electrolyte layer positioned between the positive electrode layer and the negative electrode layer, the positive electrode layer includes a positive electrode current collector and a positive electrode active material layer which is in contact with the positive electrode current collector, the negative electrode layer includes a negative electrode current collector and a negative electrode active material layer which is in contact with the negative electrode current collector, at least one of the positive electrode active material layer and the negative electrode active material layer has a plurality of voids and a plurality of carbon materials therein, and 8% or more of the plurality of voids are in contact with any of the plurality of carbon materials.Type: ApplicationFiled: September 29, 2020Publication date: November 17, 2022Applicant: TDK CORPORATIONInventors: Teiichi TANAKA, Takeo TSUKADA
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Publication number: 20220344720Abstract: This all-solid-state battery includes a positive electrode layer, a negative electrode layer, and a solid electrolyte layer positioned between the positive electrode layer and the negative electrode layer, the positive electrode layer includes a positive electrode current collector and a positive electrode active material layer which is in contact with the positive electrode current collector, the negative electrode layer includes a negative electrode current collector and a negative electrode active material layer which is in contact with the negative electrode current collector, at least one of the positive electrode active material layer and the negative electrode active material layer has a plurality of voids therein, and the plurality of voids include an anisotropic void in which an aspect ratio obtained by dividing a length in a major axis direction by a length in a minor axis direction is 2 or more and 29 or less.Type: ApplicationFiled: September 29, 2020Publication date: October 27, 2022Applicant: TDK CORPORATIONInventors: Teiichi TANAKA, Takeo TSUKADA
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Patent number: 11349146Abstract: An all-solid lithium ion secondary battery has a pair of electrode layers and a solid electrolyte layer between the pair of electrode layers. In the all-solid lithium ion secondary battery, at least one electrode of the pair of electrodes has an active material layer and an intermediate layer on the surface of the active material layer on the side of the solid electrolyte layer, and each of the solid electrolyte layer, the intermediate layer, and the active material layer includes a compound containing Li and two or more shared types of metal elements other than Li, the two or more shared types of metal elements in the solid electrolyte layer, the intermediate layer, and the active material layer are identical between the solid electrolyte layer, the intermediate layer, and the active material layer.Type: GrantFiled: September 25, 2017Date of Patent: May 31, 2022Assignee: TDK CORPORATIONInventors: Hiroshi Sato, Masahiro Oishi, Takeo Tsukada, Gakuho Isomichi, Tetsuya Ueno
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Patent number: 11251431Abstract: A high discharge capacity in an all-solid-state battery in which lithium vanadium phosphate is used in a positive electrode active material layer and a negative electrode active material layer. An all-solid-state battery wherein a positive electrode active material layer and a negative electrode active material layer contain lithium vanadium phosphate, which includes a Li- and V-containing polyphosphate compound and satisfies 1.50<Li/V?2.30, with the percentage of divalent V included in the V being 5˜80%. Thus, a high discharge capacity can be provided.Type: GrantFiled: March 28, 2018Date of Patent: February 15, 2022Assignee: TDK CORPORATIONInventor: Takeo Tsukada
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Publication number: 20200395619Abstract: An active material is represented by a chemical formula Li3+aV2-xMx(PO4)3 (?0.35?a?0.7, 0<x?51.4), and M is an element to be a divalent or tetravalent cation in a crystal structure.Type: ApplicationFiled: February 21, 2019Publication date: December 17, 2020Applicant: TDK CORPORATIONInventors: Teiichi TANAKA, Takeo TSUKADA
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Patent number: 10854917Abstract: An active material layer containing a compound represented by a general formula (1): LiaVbAlcTidPeO12 (1), where a, b, c, d, and e in the general formula (1) are numbers satisfying 0.5?a?3.0, 1.20<b?2.00, 0.01?c<0.06, 0.01?d<0.60, and 2.80?e?3.20; and a solid electrolyte layer containing a compound represented by a general formula (2): LifVgAlhTiiPjO12 (2), where f, g, h, i, and j in general formula (2) are numbers satisfying 0.5?f?3.0, 0.01?g<1.00, 0.09<h?0.30, 1.40<i?2.00, and 2.80?j?3.20.Type: GrantFiled: September 25, 2017Date of Patent: December 1, 2020Assignee: TDK CORPORATIONInventors: Hiroshi Sato, Masahiro Oishi, Takeo Tsukada, Gakuho Isomichi, Tetsuya Ueno
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Publication number: 20200266445Abstract: A high discharge capacity in an all-solid-state battery in which lithium vanadium phosphate is used in a positive electrode active material layer and a negative electrode active material layer. An all-solid-state battery wherein a positive electrode active material layer and a negative electrode active material layer contain lithium vanadium phosphate, which includes a Li- and V-containing polyphosphate compound and satisfies 1.50<Li/V?2.30, with the percentage of divalent V included in the V being 5-80%. Thus, a high discharge capacity can be provided.Type: ApplicationFiled: March 28, 2018Publication date: August 20, 2020Applicant: TDK CORPORATIONInventor: Takeo TSUKADA
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Publication number: 20200091518Abstract: An objective of the present invention is to provide an all-solid-state battery with a high discharge capacity in which lithium vanadium phosphate is used as a positive electrode active material layer and a negative electrode active material layer. According to the present invention, the positive electrode active material layer and the negative electrode active material layer of the all-solid-state battery having an all-solid-state electrolyte between a pair of electrodes contain the lithium vanadium phosphate, the lithium vanadium phosphate contains a polyphosphate compound containing Li and V, and the lithium vanadium phosphate contains Li3V2(PO4)3 as a main phase and contains 1.0% by weight or more and 15.0% by weight or less of Li3PO4 relative to Li3V2(PO4)3, whereby a high discharge capacity can be provided.Type: ApplicationFiled: March 28, 2018Publication date: March 19, 2020Applicant: TDK CORPORATIONInventor: Takeo TSUKADA
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Publication number: 20190280327Abstract: An all-solid lithium ion secondary battery has a pair of electrode layers and a solid electrolyte layer between the pair of electrode layers. In the all-solid lithium ion secondary battery, at least one electrode of the pair of electrodes has an active material layer and an intermediate layer on the surface of the active material layer on the side of the solid electrolyte layer, and each of the solid electrolyte layer, the intermediate layer, and the active material layer includes a compound containing Li and two or more shared types of metal elements other than Li, the two or more shared types of metal elements in the solid electrolyte layer, the intermediate layer, and the active material layer are identical between the solid electrolyte layer, the intermediate layer, and the active material layer.Type: ApplicationFiled: September 25, 2017Publication date: September 12, 2019Applicant: TDK CORPORATIONInventors: Hiroshi SATO, Masahiro OISHI, Takeo TSUKADA, Gakuho ISOMICHI, Tetsuya UENO
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Publication number: 20190252720Abstract: An active material layer containing a compound represented by a general formula (1): LiaVbAlcTidPeO12 (1), where a, b, c, d, and e in the general formula (1) are numbers satisfying 0.5?a?3.0, 1.20<b?2.00, 0.01?c<0.06, 0.01?d<0.60, and 2.80?e?3.20; and a solid electrolyte layer containing a compound represented by a general formula (2): LifVgAlhTiiPjO12 (2), where f, g, h, i, and j in general formula (2) are numbers satisfying 0.5?f?3.0, 0.01?g<1.00, 0.09<h?0.30, 1.40<i?2.00, and 2.80?j?3.20.Type: ApplicationFiled: September 25, 2017Publication date: August 15, 2019Applicant: TDK CORPORATIONInventors: Hiroshi SATO, Masahiro OISHI, Takeo TSUKADA, Gakuho ISOMICHI, Tetsuya UENO
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Patent number: 10218032Abstract: A Li-ion conductive oxide ceramic material including a garnet-type or similar crystal structure according to an aspect of the present disclosure contains Li, La, Zr, and O, the material further containing one or more elements selected from the group consisting of rare-earth elements. A Li-ion conductive oxide ceramic material including a garnet-type or similar crystal structure according to the other aspects of the present disclosure is represented by the following composition formula (1) Li7+xLa3Zr2?xAxO12 where A is one or more elements selected from the group consisting of rare-earth elements, and x is a number such that 0<x?0.5.Type: GrantFiled: March 8, 2016Date of Patent: February 26, 2019Assignee: TDK CORPORATIONInventors: Takeo Tsukada, Teiichi Tanaka, Hirofumi Kakuta, Taisuke Masuko
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Patent number: 9991556Abstract: A garnet-type Li-ion conductive oxide contains Li, La, Zr, and oxygen and contains at least one type of element among elements represented by M1, M2, M3, and M4. M1, M2, M3, and M4 are as follows: M1: One or more types of elements selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; M2: One or more types of elements selected from the group consisting of Al, Ga, Co, Fe, and Y; M3: One or more types of elements selected from the group consisting of Sn and Ge; and M4: One or more types of elements selected from the group consisting of Ta and Nb.Type: GrantFiled: March 8, 2016Date of Patent: June 5, 2018Assignee: TDK CORPORATIONInventors: Teiichi Tanaka, Takeo Tsukada, Taisuke Masuko
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Patent number: 9780408Abstract: A garnet-type Li-ion conductive oxide containing LixLa3Zr2O12 (6?x?8) contains Al and element T (T is one or more from Ni, Cu, Co, and Fe). The content of Al is, in terms of Al2O3, 2.5 mol %?Al2O3?15 mol % with respect to a total amount of LixLa3Zr2O12 contained in the garnet-type Li-ion conductive oxide. The content of element T is 25 mol %?T?100 mol % with respect to the total amount of LixLa3Zr2O12 contained in the garnet-type Li-ion conductive oxide.Type: GrantFiled: March 8, 2016Date of Patent: October 3, 2017Assignee: TDK CORPORATIONInventors: Taisuke Masuko, Teiichi Tanaka, Takeo Tsukada
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Patent number: 9595399Abstract: The present invention provides a solid-state ion capacitor. In the solid-state ion capacitor, the particle number in the thickness direction of the solid electrolyte sandwiched between the electrodes was at least 1 and the average particle number was 80 or less. Further, the solid electrolyte includes particles with D10˜D90 in the particle diameters of particle size distribution of 0.5 ?m or more and 100 ?m or less.Type: GrantFiled: May 20, 2014Date of Patent: March 14, 2017Assignees: TDK CORPORATION, ENERGY STORAGE MATERIALS LLCInventors: Teiichi Tanaka, Takeo Tsukada, Takaaki Tsurumi
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Publication number: 20160268630Abstract: A Li-ion conductive oxide ceramic material including a garnet-type or similar crystal structure according to an aspect of the present disclosure contains Li, La, Zr, and 0, the material further containing one or more elements selected from the group consisting of rare-earth elements, A Li-ion conductive oxide ceramic material including a garnet-type or similar crystal structure according to the other aspects of the present disclosure is represented by the following composition formula (I) Li7+xLa3Zr2-xAxO12 where A is one or more elements selected from the group consisting of rare-earth elements, and x is a number such that 0<x?0.5.Type: ApplicationFiled: March 8, 2016Publication date: September 15, 2016Applicant: TDK CORPORATIONInventors: Takeo TSUKADA, Teiichi TANAKA, Hirofumi KAKUTA, Taisuke MASUKO
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Publication number: 20160268629Abstract: A garnet-type Li-ion conductive oxide contains Li, La, Zr, and oxygen and contains at least one type of element among elements represented by M1, M2, M3, and M4. M1, M2, M3, and M4 are as follows: M1: One or more types of elements selected from the group consisting of Mg, Ca, Sr, Ba, and Zn; M2: One or more types of elements selected from the group consisting of Al, Ga, Co, Fe, and Y; M3: One or more types of elements selected from the group consisting of Sn and Ge; and M4: One or more types of elements selected from the group consisting of Ta and Nb.Type: ApplicationFiled: March 8, 2016Publication date: September 15, 2016Applicant: TDK CORPORATIONInventors: Teiichi TANAKA, Takeo TSUKADA, Taisuke MASUKO
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Publication number: 20160268628Abstract: A garnet-type Li-ion conductive oxide containing LixLa3Zr2O12 (6?x?8) contains Al and element T (T is one or more from Ni, Cu, Co, and Fe). The content of Al is, in terms of Al2O3, 2.5 mol %?Al2O3?15 mol % with respect to a total amount of LixLa3Zr2O12 contained in the garnet-type Li-ion conductive oxide. The content of element T is 25 mol %?T?100 mol % with respect to the total amount of LixLa3Zr2O12 contained in the garnet-type Li-ion conductive oxide.Type: ApplicationFiled: March 8, 2016Publication date: September 15, 2016Applicant: TDK CORPORATIONInventors: Taisuke MASUKO, Teiichi TANAKA, Takeo TSUKADA