Patents by Inventor Mitsutoshi Otaki
Mitsutoshi Otaki 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: 20240136522Abstract: A main object of the present disclosure is to provide an active material wherein an expansion upon intercalation of a metal ion such as a Li ion is suppressed. The present disclosure achieves the object by providing an active material comprising a silicon clathrate type crystal phase, and the active material includes a Na element, a Si element and a M element that is a metal element with an ion radius larger than the Si element, and a proportion of the M element to a total of the Si element and the M element is 0.1 atm % or more and 5 atm % or less.Type: ApplicationFiled: December 29, 2023Publication date: April 25, 2024Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki YAMAGUCHI, Hironori DAIKOKU, Jun YOSHIDA, Kazuhiro SUZUKI, Mitsutoshi OTAKI
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Patent number: 11967715Abstract: A main object of the present disclosure is to provide an active material wherein a volume variation due to charge/discharge is small. The present disclosure achieves the object by providing an active material comprising a silicon clathrate II type crystal phase, and having a composition represented by NaxSi136, wherein 1.98<x<2.54.Type: GrantFiled: March 24, 2021Date of Patent: April 23, 2024Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsutoshi Otaki, Jun Yoshida, Kazuhiro Suzuki, Masanori Harata
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Patent number: 11901556Abstract: A main object of the present disclosure is to provide an active material wherein an expansion upon intercalation of a metal ion such as a Li ion is suppressed. The present disclosure achieves the object by providing an active material comprising a silicon clathrate type crystal phase, and the active material includes a Na element, a Si element and a M element that is a metal element with an ion radius larger than the Si element, and a proportion of the M element to a total of the Si element and the M element is 0.1 atm % or more and 5 atm % or less.Type: GrantFiled: October 5, 2022Date of Patent: February 13, 2024Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Yamaguchi, Hironori Daikoku, Jun Yoshida, Kazuhiro Suzuki, Mitsutoshi Otaki
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Publication number: 20240043966Abstract: The manufacturing method of a porous silicon material of the present disclosure includes a particle forming step of melting a raw material containing Al as a first element in an amount of 50% by mass or more and Si in an amount of 50% by mass or less to obtain a silicon alloy, a pore forming step of removing the first element from the silicon alloy to obtain a porous material, and a heat treatment step of heating the porous material to diffuse elements other than Si to a surface of the porous material.Type: ApplicationFiled: October 20, 2023Publication date: February 8, 2024Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki KAWAURA, Yasuhito KONDO, Ryo SUZUKI, Hiroshi NOZAKI, Jun YOSHIDA, Tetsuya WASEDA, Mitsutoshi OTAKI
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Publication number: 20240030422Abstract: The main object of the disclosure is to provide electrode active material Si particles that can inhibit fluctuation in constraining pressure of a battery during charge-discharge. The electrode active material Si particles have clathrate-type Si and diamond-type Si in the same particles. The electrode active material Si particles preferably comprise diamond-type Si at an area % of 0.05 to 11.00 with respect to the entire electrode active material Si particles. Preferably, the clathrate-type Si at least partially has a clathrate type II structure. The electrode active material Si particles preferably have a porous structure.Type: ApplicationFiled: July 14, 2023Publication date: January 25, 2024Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naohiro MASHIMO, Mitsutoshi OTAKI, Jun YOSHIDA, Masanori HARATA, Yasuhiro YAMAGUCHI, Kota URABE, Tatsuya EGUCHI
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Publication number: 20240030421Abstract: Negative electrode active material particles of the present disclosure are Si particles with pores inside primary particles and having a clathrate type crystalline phase, and satisfying the following relationship: 0.061?V/W. Here, V is a volume of pores having a pore diameter of 10 nm or less and W is a half width of a peak at 2?=31.72°±0.50° in an X-ray diffraction test using CuK?.Type: ApplicationFiled: July 18, 2023Publication date: January 25, 2024Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Naohiro MASHIMO, Mitsutoshi OTAKI, Jun YOSHIDA, Masanori HARATA, Yasuhiro YAMAGUCHI, Kota URABE, Tatsuya EGUCHI
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Publication number: 20240021805Abstract: The present disclosure provides primarily a negative electrode active material with reduced volume change during charge-discharge. The negative electrode active material of the disclosure consists of clathrate-type Si particles comprising one or more metals selected from the group consisting of Mo, Fe, Zn, Mg, Pd, Zr, Ag, Co, Cr, Nb and V. A negative electrode active material layer according to the disclosure comprises the negative electrode active material of the disclosure, and a lithium-ion battery of the disclosure comprises the negative electrode active material layer of the disclosure.Type: ApplicationFiled: July 12, 2023Publication date: January 18, 2024Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsutoshi OTAKI, Jun YOSHIDA, Shinji NAKANISHI, Hisatsugu YAMASAKI, Natsuki KIKUCHI, Yasuhiro YAMAGUCHI, Tatsuya EGUCHI, Masanori HARATA, Kota URABE
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Publication number: 20240014388Abstract: A negative electrode body of the present disclosure is a negative electrode body for a lithium ion battery having a negative electrode current collector layer and a negative electrode active material layer, wherein the negative electrode active material layer contains Si particles having a clathrate type structure as a negative electrode active material, wherein the negative electrode active material layer contains 0.850 mass % to 5.000 mass % of Al with respect to a mass of the negative electrode active material layer, and wherein the Si particles contain 0.040 mass % to 0.250 mass % of Al with respect to a mass of the Si particles.Type: ApplicationFiled: July 7, 2023Publication date: January 11, 2024Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsutoshi Otaki, Jun Yoshida, Shinji Nakanishi, Yasuhiro Yamaguchi, Tatsuya Eguchi, Masanori Harata, Kota Urabe, Tomohiro Niimi, Kayoko Yukawa
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Publication number: 20240014389Abstract: A main object of the present disclosure is to provide an active material wherein a volume variation due to charge/discharge is small. The present disclosure achieves the object by providing an active material comprising a silicon clathrate II type crystal phase, including a void inside a primary particle, and a void amount of the void with a fine pore diameter of 100 nm or less is 0.05 cc/g or more and 0.15 cc/g or less.Type: ApplicationFiled: September 21, 2023Publication date: January 11, 2024Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsutoshi OTAKI, Jun YOSHIDA, Kazuhiro SUZUKI, Masanori HARATA
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Publication number: 20240014377Abstract: A main object of the present disclosure is to provide a car having an all solid state battery with excellent capacity durability when restraining pressure is not applied or even when low restraining pressure is applied thereto. The present disclosure achieves the object by providing an all solid state battery comprising layers in the order of a cathode layer, a solid electrolyte layer, and an anode layer; wherein the anode layer contains an anode active material including a silicon clathrate II type crystal phase; restraining pressure of 0 MPa or more and less than 5 MPa is applied to the all solid state battery in a layering direction; and a specific surface area of the anode active material is 8 m2/g or more and 17 m2/g or less.Type: ApplicationFiled: September 25, 2023Publication date: January 11, 2024Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsutoshi OTAKI, Jun YOSHIDA
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Patent number: 11851733Abstract: The manufacturing method of a porous silicon material of the present disclosure includes a particle forming step of melting a raw material containing Al as a first element in an amount of 50% by mass or more and Si in an amount of 50% by mass or less to obtain a silicon alloy, a pore forming step of removing the first element from the silicon alloy to obtain a porous material, and a heat treatment step of heating the porous material to diffuse elements other than Si to a surface of the porous material.Type: GrantFiled: June 20, 2022Date of Patent: December 26, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Kawaura, Yasuhito Kondo, Ryo Suzuki, Hiroshi Nozaki, Jun Yoshida, Tetsuya Waseda, Mitsutoshi Otaki
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Publication number: 20230402589Abstract: To provide a cathode mixture configured to increase the discharge capacity of a lithium secondary battery. The cathode mixture is a cathode mixture for lithium secondary batteries, comprising: a cathode active material containing an S element, and diphenyl disulfide as an additive, wherein a content of the diphenyl disulfide in the cathode mixture is less than 13.0 mass % of a total mass (100 mass %) of the cathode mixture.Type: ApplicationFiled: June 10, 2022Publication date: December 14, 2023Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, The Penn State Research FoundationInventors: Shigenori HAMA, Keisuke OMORI, Mitsutoshi OTAKI, Donghai WANG, Atif S. ALZAHRANI, Daiwei WANG
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Patent number: 11804589Abstract: A main object of the present disclosure is to provide an all solid state battery with excellent capacity durability when restraining pressure is not applied or even when low restraining pressure is applied thereto. The present disclosure achieves the object by providing an all solid state battery comprising layers in the order of a cathode layer, a solid electrolyte layer, and an anode layer; wherein the anode layer contains an anode active material including a silicon clathrate II type crystal phase; restraining pressure of 0 MPa or more and less than 5 MPa is applied to the all solid state battery in a layering direction; and a specific surface area of the anode active material is 8 m2/g or more and 17 m2/g or less.Type: GrantFiled: November 23, 2021Date of Patent: October 31, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsutoshi Otaki, Jun Yoshida
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Patent number: 11799076Abstract: A main object of the present disclosure is to provide an active material wherein a volume variation due to charge/discharge is small. The present disclosure achieves the object by providing an active material comprising a silicon clathrate II type crystal phase, including a void inside a primary particle, and a void amount of the void with a fine pore diameter of 100 nm or less is 0.05 cc/g or more and 0.15 cc/g or less.Type: GrantFiled: March 24, 2021Date of Patent: October 24, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsutoshi Otaki, Jun Yoshida, Kazuhiro Suzuki, Masanori Harata
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Publication number: 20230265542Abstract: The manufacturing method of a porous silicon material of the present disclosure includes a particle forming step of melting a raw material containing Al as a first element in an amount of 50% by mass or more and Si in an amount of 50% by mass or less to obtain a silicon alloy, a pore forming step of removing the first element from the silicon alloy to obtain a porous material, and a heat treatment step of heating the porous material to diffuse elements other than Si to a surface of the porous material.Type: ApplicationFiled: April 28, 2023Publication date: August 24, 2023Applicant: TOTOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Kawaura, Yasuhito Kondo, Ryo Suzuki, Hiroshi Nozaki, Jun Yoshida, Tetsuya Waseda, Mitsutoshi Otaki
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Publication number: 20230090390Abstract: A main object of the present disclosure is to provide an active material wherein a volume variation due to charge/discharge is small. The present disclosure achieves the object by providing an active material comprising a silicon clathrate II type crystal phase, including a void inside a primary particle, and a void amount A of the void with a fine pore diameter of 100 nm or less is more than 0.15 cc/g and 0.40 cc/g or less.Type: ApplicationFiled: September 7, 2022Publication date: March 23, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsutoshi Otaki, Jun Yoshida, Masanori Harata, Yasuhiro Yamaguchi, Kota Urabe, Tatsuya Eguchi
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Publication number: 20230086351Abstract: A method for manufacturing a negative electrode active material includes: an alloying step of causing an Na source and an Si source to react to produce an Na—Si alloy containing Na and Si; and a silicon clathrate production step of heating the Na—Si alloy and reducing an amount of Na in the Na—Si alloy to produce a type-II silicon clathrate. Porous Si with a BET specific surface area of 20 m2/g or more is used as the Si source.Type: ApplicationFiled: September 15, 2022Publication date: March 23, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masanori Harata, Kazuhiro Niimura, Kota Urabe, Yasuhiro Yamaguchi, Tatsuya Eguchi, Mitsutoshi Otaki, Jun Yoshida
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Patent number: 11600846Abstract: Disclosed is an all-solid-state lithium ion secondary battery excellent in cycle characteristics. The battery may be an all-solid-state lithium ion secondary battery, wherein an anode comprises anode active material particles, an electroconductive material and a solid electrolyte; wherein the anode active material particles comprise at least one active material selected from the group consisting of elemental silicon and SiO; and wherein a BET specific surface area of the anode active material particles is 1.9 m2/g or more and 14.2 m2/g or less.Type: GrantFiled: June 13, 2018Date of Patent: March 7, 2023Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Mitsutoshi Otaki, Norihiro Ose, Shigenori Hama, Kazuyuki Taniguchi, Yoshiyasu Yamada, Tetsuo Nakanishi
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Publication number: 20230040714Abstract: A main object of the present disclosure is to provide an active material wherein an expansion upon intercalation of a metal ion such as a Li ion is suppressed. The present disclosure achieves the object by providing an active material comprising a silicon clathrate type crystal phase, and the active material includes a Na element, a Si element and a M element that is a metal element with an ion radius larger than the Si element, and a proportion of the M element to a total of the Si element and the M element is 0.1 atm % or more and 5 atm % or less.Type: ApplicationFiled: October 5, 2022Publication date: February 9, 2023Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki YAMAGUCHI, Hironori DAIKOKU, Jun YOSHIDA, Kazuhiro SUZUKI, Mitsutoshi OTAKI
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Publication number: 20220411897Abstract: The manufacturing method of a porous silicon material of the present disclosure includes a particle forming step of melting a raw material containing Al as a first element in an amount of 50% by mass or more and Si in an amount of 50% by mass or less to obtain a silicon alloy, a pore forming step of removing the first element from the silicon alloy to obtain a porous material, and a heat treatment step of heating the porous material to diffuse elements other than Si to a surface of the porous material.Type: ApplicationFiled: June 20, 2022Publication date: December 29, 2022Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroyuki Kawaura, Yasuhito Kondo, Ryo Suzuki, Hiroshi Nozaki, Jun Yoshida, Tetsuya Waseda, Mitsutoshi Otaki