Patents by Inventor Takamasa Otomo
Takamasa Otomo 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: 11527750Abstract: A main object of the present disclosure is to provide an active material whose volume variation due to charge and discharge is small. The present disclosure achieves the object by providing an active material comprising a primary particle including at least one crystal phase of a Type I silicon clathrate and a Type II silicon clathrate, and the primary particle includes a void inside thereof.Type: GrantFiled: October 30, 2019Date of Patent: December 13, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daichi Kosaka, Jun Yoshida, Tetsuya Waseda, Takamasa Otomo
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Patent number: 11296315Abstract: A main object of the present disclosure is to provide a battery with excellent capacity. The present disclosure achieves the object by providing a battery comprising a cathode layer, an electrolyte layer, and an anode layer, in this order, and the anode layer includes a silicon clathrate compound, as an anode active material, the silicon clathrate compound has a composition represented by MxSi46, wherein M is a metal element, x satisfies 0<x<46, and includes a crystal phase of a Type I silicon clathrate, and an average primary particle size of the silicon clathrate compound is 50 nm or more and 3000 nm or less.Type: GrantFiled: July 8, 2019Date of Patent: April 5, 2022Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Jun Yoshida, Daichi Kosaka, Takamasa Otomo, Hideyuki Nakano
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Patent number: 11088367Abstract: A main object of the present disclosure is to provide a novel active material of which volume change due to charge and discharge is small. The present disclosure achieves the object by providing a method for producing an active material having a composition represented by NaxMySi46 (M is a metal element other than Na, x and y satisfy 0<x, 0?y, y?x, and 0<x+y<8), and a silicon clathrate I type crystal phase, the method comprising: a preparing step of preparing a precursor compound having the silicon clathrate I type crystal phase; and a liquid treatment step of bringing the precursor compound into contact with a polar liquid so as to desorb a Na element from the precursor compound and obtain the active material.Type: GrantFiled: October 7, 2019Date of Patent: August 10, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daichi Kosaka, Jun Yoshida, Tetsuya Waseda, Takamasa Otomo
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Patent number: 11075372Abstract: A main object of the present disclosure is to provide a novel active material whose volume variation due to charge/discharge is small. The present disclosure achieves the object by providing an active material having a composition represented by NaxMySi46, wherein M is a metal element other than Na, x and y satisfy 0<x, 0?y, y?x and 0<x+y<8, and comprising a crystal phase of a Type I silicon clathrate.Type: GrantFiled: July 5, 2019Date of Patent: July 27, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Jun Yoshida, Daichi Kosaka, Takamasa Otomo, Tetsuya Waseda, Hideyuki Nakano
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Publication number: 20200176768Abstract: A main object of the present disclosure is to provide an active material whose volume variation due to charge and discharge is small. The present disclosure achieves the object by providing an active material comprising a primary particle including at least one crystal phase of a Type I silicon clathrate and a Type II silicon clathrate, and the primary particle includes a void inside thereof.Type: ApplicationFiled: October 30, 2019Publication date: June 4, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Daichi KOSAKA, Jun YOSHIDA, Tetsuya WASEDA, Takamasa OTOMO
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Publication number: 20200119352Abstract: A main object of the present disclosure is to provide a novel active material of which volume change due to charge and discharge is small. The present disclosure achieves the object by providing a method for producing an active material having a composition represented by NaxMySi46 (M is a metal element other than Na, x and y satisfy 0<x, 0?y, y?x, and 0<x+y<8), and a silicon clathrate I type crystal phase, the method comprising: a preparing step of preparing a precursor compound having the silicon clathrate I type crystal phase; and a liquid treatment step of bringing the precursor compound into contact with a polar liquid so as to desorb a Na element from the precursor compound and obtain the active material.Type: ApplicationFiled: October 7, 2019Publication date: April 16, 2020Inventors: Daichi KOSAKA, Jun YOSHIDA, Tetsuya WASEDA, Takamasa OTOMO
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Publication number: 20200020936Abstract: A main object of the present disclosure is to provide a battery with excellent capacity. The present disclosure achieves the object by providing a battery comprising a cathode layer, an electrolyte layer, and an anode layer, in this order, and the anode layer includes a silicon clathrate compound, as an anode active material, the silicon clathrate compound has a composition represented by MxSi46, wherein M is a metal element, x satisfies 0<x<46, and includes a crystal phase of a Type I silicon clathrate, and an average primary particle size of the silicon clathrate compound is 50 nm or more and 3000 nm or less.Type: ApplicationFiled: July 8, 2019Publication date: January 16, 2020Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Jun YOSHIDA, Daichi KOSAKA, Takamasa OTOMO, Hideyuki NAKANO
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Publication number: 20200020929Abstract: A main object of the present disclosure is to provide a novel active material whose volume variation due to charge/discharge is small. The present disclosure achieves the object by providing an active material having a composition represented by NaxMySi46, wherein M is a metal element other than Na, x and y satisfy 0<x, 0?y, y?x and 0<x+y<8, and comprising a crystal phase of a Type I silicon clathrate.Type: ApplicationFiled: July 5, 2019Publication date: January 16, 2020Inventors: Jun YOSHIDA, Daichi KOSAKA, Takamasa OTOMO, Tetsuya WASEDA, Hideyuki NAKANO
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Patent number: 10388985Abstract: The main object of the present invention is to provide a sulfide solid electrolyte material having favorable ion conductivity and high stability against moisture. The present invention solves the above-mentioned problem by providing a sulfide solid electrolyte material comprising an M1 element (such as Li element), an M2 element (such as Ge element, Sn element and P element) and a S element, and having a peak at a position of 2?=29.58°±0.50° in X-ray diffraction measurement using a CuK? ray, characterized in that when a diffraction intensity at the above-mentioned peak of 2?=29.58°±0.50° is regarded as IA and a diffraction intensity at a peak of 2?=27.33°±0.50° is regarded as IB, a value of IB/IA is less than 0.50, and the M2 contains at least P and Sn.Type: GrantFiled: February 5, 2013Date of Patent: August 20, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuki Kato, Takamasa Otomo, Mitsuru Sakano
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Patent number: 10033065Abstract: A main object of the present invention is to provide a sulfide solid electrolyte material having favorable ion conductivity and low reduction potential. The present invention solves the above-mentioned problem by providing a sulfide solid electrolyte material including an M1 element (such as a Li element), an M2 element (such as a Ge element, a Si element and a P element) and a S element, wherein the material has a peak at a position of 2?=29.58°±0.50° in X-ray diffraction measurement using a CuK? line; and when a diffraction intensity at the peak of 2?=29.58°±0.50° is regarded as IA and a diffraction intensity at a peak of 2?=27.33°±0.50° is regarded as IB, a value of IB/IA is less than 0.50, and M2 contains at least P and Si.Type: GrantFiled: February 5, 2013Date of Patent: July 24, 2018Assignees: TOKYO INSTITUTE OF TECHNOLOGY, TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Ryoji Kanno, Masaaki Hirayama, Yuki Kato, Takamasa Otomo, Mitsuru Sakano
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Patent number: 9484596Abstract: The object of the present invention is to provide a battery system in which reductive decomposition of a Ge-containing solid electrolyte material is restricted. The present invention attains the object by providing a battery system including a battery and a control apparatus, wherein the battery has a cathode active material layer containing a cathode active material, an anode active material layer containing a Si-containing anode active material, and an electrolyte layer formed between the cathode active material layer and the anode active material layer, at least one of the anode active material layer and the electrolyte layer contains a Ge-containing solid electrolyte material, and the control apparatus is an apparatus to control an electric potential of the Si-containing anode active material so as to be reduction potential or less of the Ge-containing solid electrolyte material.Type: GrantFiled: May 14, 2013Date of Patent: November 1, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takamasa Otomo, Koji Kawamoto, Yuki Kato
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Solid electrolyte material, solid state battery, and method for producing solid electrolyte material
Patent number: 9337509Abstract: A main object of the present invention is to provide a solid electrolyte material having excellent electron conductivity. The present invention solves the problem by providing the solid electrolyte material including: a solid electrolyte particle; and a carbon coating layer formed on a surface of the solid electrolyte particle.Type: GrantFiled: June 2, 2011Date of Patent: May 10, 2016Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuki Kato, Shigenori Hama, Takamasa Otomo -
Patent number: 9263763Abstract: The object of the present invention is to provide a sulfide solid electrolyte material with favorable ion conductivity. The present invention attains the object by providing a sulfide solid electrolyte material including an M1 element (such as a Li element), an M2 element (such as a Ge element and a P element), a S element and an O element, and having a peak at a position of 2?=29.58°±0.50° in an X-ray diffraction measurement using a CuK? ray, characterized in that when a diffraction intensity at the peak of 2?=29.58°±0.50° is regarded as IA and a diffraction intensity at a peak of 2?=27.33°±0.50° is regarded as IB, a value of IB/IA is less than 0.50.Type: GrantFiled: December 21, 2012Date of Patent: February 16, 2016Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, TOKYO INSTITUTE OF TECHNOLOGYInventors: Masaaki Hirayama, Ryoji Kanno, Yuki Kato, Koji Kawamoto, Takamasa Otomo
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Patent number: 9160034Abstract: A method for producing a sulfide solid electrolyte material having a small amount of hydrogen sulfide generation and a high Li ion conductivity. To achieve the above, a method for producing a sulfide solid electrolyte material is provided, including steps of: a providing step for providing a crystallized sulfide solid electrolyte material prepared by using a raw material composition containing Li2S and P2S5; and an amorphizing step for applying amorphization treatment to the crystallized sulfide solid electrolyte material.Type: GrantFiled: June 29, 2010Date of Patent: October 13, 2015Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yuki Kato, Koji Kawamoto, Shigenori Hama, Takamasa Otomo
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Publication number: 20150214572Abstract: A main object of the present invention is to provide a sulfide solid electrolyte whose reduction decomposition potential can be decreased more than a conventional LGPS-based sulfide solid electrolyte. The present invention is a sulfide solid electrolyte comprising Li, Al, Ge, P, and S, wherein M0=M2/M1 is 0<M0<0.323 where M1 is a mole fraction of contained P, and M2 is a mole fraction of contained Al, and in a case where each of X1 and X2 is an element selected from the group consisting of P, Ge, and Al, a crystal structure thereof includes an octahedron O formed by Li and S, a tetrahedron T1 formed by S and X1, and a tetrahedron T2 formed by S and X2, wherein the octahedron O and the tetrahedron T2 share a ridge, and the octahedron O and the tetrahedron T2 share an apex.Type: ApplicationFiled: February 18, 2013Publication date: July 30, 2015Inventors: Yuki Kato, Takamasa Otomo, Ryoji Kanno, Masaaki Hirayama
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Publication number: 20150147597Abstract: The object of the present invention is to provide a battery system in which reductive decomposition of a Ge-containing solid electrolyte material is restricted. The present invention attains the object by providing a battery system including a battery and a control apparatus, wherein the battery has a cathode active material layer containing a cathode active material, an anode active material layer containing a Si-containing anode active material, and an electrolyte layer formed between the cathode active material layer and the anode active material layer, at least one of the anode active material layer and the electrolyte layer contains a Ge-containing solid electrolyte material, and the control apparatus is an apparatus to control an electric potential of the Si-containing anode active material so as to be reduction potential or less of the Ge-containing solid electrolyte material.Type: ApplicationFiled: May 14, 2013Publication date: May 28, 2015Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Takamasa Otomo, Koji Kawamoto, Yuki Kato
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Patent number: 8993176Abstract: An object of the present invention is to provide a sulfide solid electrolyte glass producing a tiny amount of hydrogen sulfide. The present invention attains the above-mentioned object by providing a sulfide solid electrolyte glass including Li3PS4, characterized in that Li4P2S7 is not detected by 31P NMR measurement and the content of Li2S as determined by XPS measurement is 3% by mol or less.Type: GrantFiled: July 22, 2010Date of Patent: March 31, 2015Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yuki Kato, Koji Kawamoto, Shigenori Hama, Takamasa Otomo
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Publication number: 20150037687Abstract: A main object of the present invention is to provide a sulfide solid electrolyte material having favorable ion conductivity and low reduction potential. The present invention solves the above-mentioned problem by providing a sulfide solid electrolyte material including an M1 element (such as a Li element), an M2 element (such as a Ge element, a Si element and a P element) and a S element, wherein the material has a peak at a position of 2?=29.58°±0.50° in X-ray diffraction measurement using a CuK? line; and when a diffraction intensity at the peak of 2?=29.58°±0.50° is regarded as IA and a diffraction intensity at a peak of 2?=27.33°±0.50° is regarded as IB, a value of IB/IA is less than 0.50, and M2 contains at least P and Si.Type: ApplicationFiled: February 5, 2013Publication date: February 5, 2015Inventors: Ryoji Kanno, Masaaki Hirayama, Yuki Kato, Takamasa Otomo, Mitsuru Sakano
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Publication number: 20150017548Abstract: The main object of the present invention is to provide a sulfide solid electrolyte material having favorable ion conductivity and high stability against moisture. The present invention solves the above-mentioned problem by providing a sulfide solid electrolyte material comprising an M1 element (such as Li element), an M2 element (such as Ge element, Sn element and P element) and a S element, and having a peak at a position of 2?=29.58°±0.50° in X-ray diffraction measurement using a CuK? ray, characterized in that when a diffraction intensity at the above-mentioned peak of 2?=29.58°±0.50° is regarded as IA and a diffraction intensity at a peak of 2?=27.33°±0.50° is regarded as IB, a value of IB/IA is less than 0.50, and the M2 contains at least P and Sn.Type: ApplicationFiled: February 5, 2013Publication date: January 15, 2015Inventors: Yuki Kato, Takamasa Otomo, Mitsuru Sakano
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Publication number: 20140363745Abstract: The object of the present invention is to provide a sulfide solid electrolyte material with favorable ion conductivity. The present invention attains the object by providing a sulfide solid electrolyte material including an M1 element (such as a Li element), an M2 element (such as a Ge element and a P element), a S element and an O element, and having a peak at a position of 2?=29.58°±0.50° in an X-ray diffraction measurement using a CuK? ray, characterized in that when a diffraction intensity at the peak of 2?=29.58°±0.50° is regarded as IA and a diffraction intensity at a peak of 2?=27.33°±0.50° is regarded as IB, a value of IB/IA is less than 0.50.Type: ApplicationFiled: December 21, 2012Publication date: December 11, 2014Inventors: Masaaki Hirayama, Ryoji Kanno, Yuki Kato, Koji Kawamoto, Takamasa Otomo