Patents by Inventor Keisuke Miyanohara
Keisuke Miyanohara 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: 20230142372Abstract: An ABs-type hydrogen storage alloy is provided that has a low Co amount and uses Mm composed of La and Ce, which is capable of preventing a decrease in lifetime characteristics. The hydrogen storage alloy has an ABx composition constituted with an A-site composed of an Mm and a B-site composed of Ni, Co, Mn, and Al, or Ni, Mn, and Al, wherein Mm is composed of La and Ce; the molar ratio of Co is 0.0 or more and 0.11 or less when the molar ratio of Mm is 1.00; the ratio (Al/Mn) of the molar ratio of Al to the molar ratio of Mn is 0.35 to 1.10; and the ratio of the c-axis length to the a-axis length in the CaCu5-type crystal structure is 0.8092 or more.Type: ApplicationFiled: April 15, 2021Publication date: May 11, 2023Inventors: Keisuke MIYANOHARA, Kyohei YAMAGUCHI
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Patent number: 11094932Abstract: A hydrogen storage alloy suitable for prescribed pretreatment, that is, pretreatment wherein mechanical pulverization is performed after pulverizing a hydrogen storage alloy and absorbing/desorbing hydrogen is provided. The hydrogen storage alloy comprises a parent phase having a CaCu5-type, that is, an AB5-type crystal structure, wherein the A site is constituted from a rare earth element containing La; and the B site does not contain Co and contains at least Ni, Al, and Mn, with the ratio (Mn/Al) of the content of Mn (molar ratio) to the content of Al (molar ratio) being 0.60 or more and less than 1.56, and the ratio (La/(Mn+Al)) of the content of La (molar ratio) to the total content of the content of Al (molar ratio) and the content of Mn (molar ratio) being more than 0.92.Type: GrantFiled: December 20, 2017Date of Patent: August 17, 2021Inventors: Keisuke Miyanohara, Kyohei Yamaguchi
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Publication number: 20190348671Abstract: A hydrogen storage alloy suitable for prescribed pretreatment, that is, pretreatment wherein mechanical pulverization is performed after pulverizing a hydrogen storage alloy and absorbing/desorbing hydrogen is provided. The hydrogen storage alloy comprises a parent phase having a CaCu5-type, that is, an AB5-type crystal structure, wherein the A site is constituted from a rare earth element containing La; and the B site does not contain Co and contains at least Ni, Al, and Mn, with the ratio (Mn/Al) of the content of Mn (molar ratio) to the content of Al (molar ratio) being 0.60 or more and less than 1.56, and the ratio (La/(Mn+Al)) of the content of La (molar ratio) to the total content of the content of Al (molar ratio) and the content of Mn (molar ratio) being more than 0.92.Type: ApplicationFiled: December 20, 2017Publication date: November 14, 2019Inventors: Keisuke MIYANOHARA, Kyohei YAMAGUCHI
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Patent number: 9738952Abstract: A hydrogen storing alloy containing only a few impurities leading to a short circuit where the yield can be maintained even when the alloy is subjected to magnetic separation treatment. A hydrogen storing alloy includes a matrix phase having an AB5 type crystal structure, the alloy having a misch metal (referred to as “Mm”) in an A-site in an ABx composition and having any one or at least one of Ni, Al, Mn, and Co in a B-site in the ABx composition, wherein the ratio (referred to as “ABx”) of the total number of moles of elements comprising the B site to the total number of moles of elements comprising the A site is 5.00<ABx?5.40; the content of Co is more than 0.0 mol % and less than 0.7 mol %; and residual magnetization is more than 0 emu/g and 0.020 emu/g or less.Type: GrantFiled: March 25, 2015Date of Patent: August 22, 2017Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Shingo Kikugawa, Keisuke Miyanohara, Yoshimi Hata
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Publication number: 20160298214Abstract: A hydrogen storing alloy containing only a few impurities leading to a short circuit where the yield can be maintained even when the alloy is subjected to magnetic separation treatment. A hydrogen storing alloy includes a matrix phase having an AB5 type crystal structure, the alloy having a misch metal (referred to as “Mm”) in an A-site in an ABx composition and having any one or at least one of Ni, Al, Mn, and Co in a B-site in the ABx composition, wherein the ratio (referred to as “ABx”) of the total number of moles of elements comprising the B site to the total number of moles of elements comprising the A site is 5.00<ABx?5.40; the content of Co is more than 0.0 mol % and less than 0.7 mol %; and residual magnetization is more than 0 emu/g and 0.020 emu/g or less.Type: ApplicationFiled: March 25, 2015Publication date: October 13, 2016Inventors: Shingo Kikugawa, Keisuke Miyanohara, Yoshimi Hata
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Patent number: 8734998Abstract: Provided is spinel-type lithium transition metal oxide (LMO) used as a positive electrode active material for lithium battery, said LMO being capable of simultaneously achieving all output characteristics (rate characteristics), high temperature cycle life characteristics, and rapid charging characteristics. The disclosed is spinel-type lithium transition metal oxide including, besides Li and Mn, one or more elements selected from a group consisting of Mg, Ti, Ni, Co, and Fe, and having crystallite size of between 200 nm and 1000 nm and strain of 0.0900 or less. Because the crystallite size is markedly large, oxygen deficiency is markedly little, and the structure is strong, when the LMO is used as a positive electrode active material for lithium secondary batteries, all output characteristics (rate characteristics), high temperature cycle life characteristics, and rapid charging characteristics can be achieved simultaneously.Type: GrantFiled: July 13, 2011Date of Patent: May 27, 2014Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Shinya Kagei, Keisuke Miyanohara, Yoshimi Hata, Yasuhiro Ochi, Tetsuya Mitsumoto
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Patent number: 8728343Abstract: Provided is a lithium ion battery wherein the content of an iron element contained in a positive electrode active material (measured with an ICP emission spectrophotometer) is 10 ppm or more, and magnetic materials having a size of 0.70 times or greater than the thickness of a separator layer are substantially not included in order to provide a lithium ion battery which has small voltage drop during a charge state or under storage at high temperatures.Type: GrantFiled: March 30, 2011Date of Patent: May 20, 2014Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Shinya Kagei, Keisuke Miyanohara, Yoshimi Hata, Yasuhiro Ochi
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Patent number: 8703341Abstract: With the object of providing a positive electrode active material for lithium battery that can increase the filling density, can increase the output characteristics, and furthermore, with a small voltage decrease during conservation at high temperature in a charged state, a positive electrode active material for lithium battery is proposed, containing a spinel type (Fd3-m) lithium transition metal oxide represented by general formula Li1+xM2?xO4?? (where M represents a transition metal including Mn, Al and Mg, x represents 0.01 to 0.08 and 0??) and a boron compound, the inter-the atomic distance Li—O of the spinel type lithium transition metal oxide being 1.971 ? to 2.006 ?, and the amount of magnetic substance measured for the positive electrode active material for lithium battery being 600 ppb or less.Type: GrantFiled: March 31, 2010Date of Patent: April 22, 2014Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Shinya Kagei, Keisuke Miyanohara, Yoshimi Hata, Yasuhiro Ochi, Kenji Sasaki
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Publication number: 20130134349Abstract: Provided is a lithium ion battery wherein the content of an iron element contained in a positive electrode active material (measured with an ICP emission spectrophotometer) is 10 ppm or more, and magnetic materials having a size of 0.70 times or greater than the thickness of a separator layer are substantially not included in order to provide a lithium ion battery which has small voltage drop during a charge state or under storage at high temperatures.Type: ApplicationFiled: March 30, 2011Publication date: May 30, 2013Applicant: Mitsui Mining & Smelting Co., Ltd.Inventors: Shinya Kagei, Keisuke Miyanohara, Yoshimi Hata, Yasuhiro Ochi
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Publication number: 20130122372Abstract: Provided is spinel-type lithium transition metal oxide (LMO) used as a positive electrode active material for lithium battery, said LMO being capable of simultaneously achieving all output characteristics (rate characteristics), high temperature cycle life characteristics, and rapid charging characteristics. The disclosed is spinel-type lithium transition metal oxide including, besides Li and Mn, one or more elements selected from a group consisting of Mg, Ti, Ni, Co, and Fe, and having crystallite size of between 200 nm and 1000 nm and strain of 0.0900 or less. Because the crystallite size is markedly large, oxygen deficiency is markedly little, and the structure is strong, when the LMO is used as a positive electrode active material for lithium secondary batteries, all output characteristics (rate characteristics), high temperature cycle life characteristics, and rapid charging characteristics can be achieved simultaneously.Type: ApplicationFiled: July 13, 2011Publication date: May 16, 2013Applicant: Mitsui Mining & Smelting Co., Ltd.Inventors: Shinya Kagei, Keisuke Miyanohara, Yoshimi Hata, Yasuhiro Ochi, Tetsuya Mitsumoto
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Publication number: 20120012776Abstract: With the object of providing a positive electrode active material for lithium battery that can increase the filling density, can increase the output characteristics, and furthermore, with a small voltage decrease during conservation at high temperature in a charged state, a positive electrode active material for lithium battery is proposed, containing a spinel type (Fd3-m) lithium transition metal oxide represented by general formula Li1+xM2-xO4-? (where M represents a transition metal including Mn, Al and Mg, x represents 0.01 to 0.08 and 0??) and a boron compound, the inter-the atomic distance Li—O of the spinel type lithium transition metal oxide being 1.971 ? to 2.006 ?, and the amount of magnetic substance measured for the positive electrode active material for lithium battery being 600 ppb or less.Type: ApplicationFiled: March 31, 2010Publication date: January 19, 2012Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Shinya Kagei, Keisuke Miyanohara, Yoshimi Hata, Yasuhiro Ochi, Kenji Sasaki
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Patent number: 7988880Abstract: In order to provide a novel spinel type lithium transition metal oxide (LMO) having excellent power performance characteristics, in which preferably both the power performance characteristics and the cycle performance at high temperature life characteristics may be balanced, a novel spinel type lithium transition metal oxide with excellent power performance characteristics is proposed by defining the inter-atomic distance Li—O to be 1.978 ? to 2.006 ? as measured by the Rietveld method using the fundamental method in a lithium transition metal oxide represented by the general formula Li1+xM2?xO4 (where M is a transition metal consisting of three elements Mn, Al and Mg and x is 0.01 to 0.08).Type: GrantFiled: October 23, 2008Date of Patent: August 2, 2011Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Naoki Kumada, Shinya Kagei, Yoshimi Hata, Kenji Sasaki, Yasuhiro Ochi, Keisuke Miyanohara
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Patent number: 7927741Abstract: In a lithium transition metal oxide having a layered structure, one is provided, which is particularly excellent as a positive electrode active material of a battery on board of an electric vehicle or a hybrid vehicle in particular. A lithium transition metal oxide having a layered structure is proposed, wherein the ratio of the crystallite diameter determined by Measurement Method 1 according to the Rietveld method with respect to the mean powder particle diameter (D50) determined by the laser diffraction/scattering-type particle size distribution measurement method is 0.05 to 0.20.Type: GrantFiled: January 28, 2008Date of Patent: April 19, 2011Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Tomoya Takeuchi, Shinya Kagei, Naoki Kumada, Keisuke Miyanohara
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Publication number: 20100243952Abstract: In order to provide a novel spinel type lithium transition metal oxide (LMO) having excellent power performance characteristics, in which preferably both the power performance characteristics and the cycle performance at high temperature life characteristics may be balanced, a novel spinel type lithium transition metal oxide with excellent power performance characteristics is proposed by defining the inter-atomic distance Li—O to be 1.978 ? to 2.006 ? as measured by the Rietveld method using the fundamental method in a lithium transition metal oxide represented by the general formula Li1+xM2?xO4 (where M is a transition metal consisting of three elements Mn, Al and Mg and x is 0.01 to 0.08).Type: ApplicationFiled: October 23, 2008Publication date: September 30, 2010Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Naoki Kumada, Shinya Kagei, Yoshimi Hata, Kenji Sasaki, Yasuhiro Ochi, Keisuke Miyanohara
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Publication number: 20100117025Abstract: In a lithium transition metal oxide having a layered structure, one is provided, which is particularly excellent as a positive electrode active material of a battery on board of an electric vehicle or a hybrid vehicle in particular. A lithium transition metal oxide having a layered structure is proposed, wherein the ratio of the crystallite diameter determined by Measurement Method 1 according to the Rietveld method with respect to the mean powder particle diameter (D50) determined by the laser diffraction/scattering-type particle size distribution measurement method is 0.05 to 0.20.Type: ApplicationFiled: January 28, 2008Publication date: May 13, 2010Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Tomoya Takeuchi, Shinya Kagei, Naoki Kumada, Keisuke Miyanohara