Patents by Inventor Shinya Kagei
Shinya Kagei 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: 20150255791Abstract: Provided is a novel spinel-type lithium-manganese composite oxide, allowing gas generation amount to be limited for a gas generated via a reaction with an electrolytic solution. Proposed is a spinel-type lithium-manganese composite oxide, wherein, when the spinel-type lithium-manganese composite oxide is placed in an ion-exchanged water at 20° C., stirred for 10 minutes, then, left to stand undisturbed for 2 minutes, separated into a supernatant and a precipitate and recovered, with respect to the “16d-site-to-32e-site inter-atomic distance (100%)” of the spinel-type lithium-manganese composite oxide contained in the precipitate measured by the Rietveld method using the fundamental method, proportionally, the “16d-site-to-32e-site inter-atomic distance” of the spinel-type lithium-manganese composite oxide contained in the supernatant is less than 101.5%.Type: ApplicationFiled: September 24, 2013Publication date: September 10, 2015Inventors: Shinya Kagei, Natsumi Shibamura, Yanko Marinov Todorov, Yoshimi Hata
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Publication number: 20150194669Abstract: Proposed is a novel negative electrode for nonaqueous electrolyte secondary batteries in which the battery capacity does not decrease even when charging and discharging are repeated. Proposed is a silicon-containing negative electrode active material for nonaqueous electrolyte secondary batteries, comprising negative electrode active material particles which are provided with a surface layer containing carbon and titanium or aluminum on the entirety or a portion of the surface of the active material.Type: ApplicationFiled: July 8, 2013Publication date: July 9, 2015Applicant: Mitsui Mining & Smelting Co., Ltd.Inventors: Daisuke Inoue, Yanko Marinov Todorov, Shinya Kagei
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Publication number: 20150180025Abstract: Provided is a novel lithium metal complex oxide powder, which is capable of maintaining stability of the slurry viscosity during storage of a slurry even when D50 thereof is less than 10 ?m, and which is also capable of suppressing a decrease in the discharge capacity during high temperature cycles. Proposed is a lithium metal complex oxide which is characterized by having a D50 of less than 10 ?m and a carbon amount per unit BET specific surface area of from 1100 ppm/(m2/g) to 7500 ppm/(m2/g).Type: ApplicationFiled: July 12, 2013Publication date: June 25, 2015Inventors: Tetsuya Mitsumoto, Hitohiko Ide, Shinya Kagei, Yoshimi Hata
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Publication number: 20150147652Abstract: Provided is a new 5 V class spinel exhibiting an operating potential of 4.5 V or more (5 V class), which can suppress the amount of gas generation during high temperature cycles. Suggested is a manganese spinel-type lithium transition metal oxide represented by formula: Li[NiyMn2-(a+b)-y-zLiaTibMz]O4 (wherein 0?z?0.3, 0.3?y<0.6, and M=at least one or more metal elements selected from the group consisting of Al, Mg, Fe and Co), in which in the above formula, the following relationships are satisfied: a>0, b>0, and 2?b/a?8.Type: ApplicationFiled: April 25, 2013Publication date: May 28, 2015Applicant: Mitsui Mining & Smelting Co., Ltd.Inventors: Natsumi Shibamura, Yanko Marinov Todorov, Shinya Kagei, Yoshimi Hata
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Publication number: 20150132645Abstract: In order to propose a new negative electrode for nonaqueous electrolyte secondary batteries having excellent dispersibility even with a negative electrode active material having a relatively small particle size, there is proposed a negative electrode active material for nonaqueous electrolyte secondary batteries, the negative electrode active material containing silicon and having negative electrode active material particles that have a D50 based on a volume-based particle size distribution obtainable by measurement by a laser diffraction scattering type particle size distribution analysis method, of 0.1 ?m to 5.0 ?m, and include a surface layer containing oxygen, silicon and carbon on the entire surface or a portion of the active material surface.Type: ApplicationFiled: May 15, 2013Publication date: May 14, 2015Inventors: Daisuke Inoue, Yanko Marinov Todorov, Shinya Kagei
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Publication number: 20150093641Abstract: Provided is a lithium metal compound oxide having a layered structure, which is very excellent as a positive electrode active material of a battery that is mounted on, particularly, an electric vehicle or a hybrid vehicle. Suggested is a lithium metal compound oxide having a layered structure which is expressed by general formula of Li1+xM1?xO2 (M represents metal elements including three elements of Mn, Co, and Ni). In the lithium metal compound oxide having a layered structure, D50 is more than 4 ?m and less than 20 ?m, a ratio of a primary particle area to a secondary particle area of secondary particles having a size corresponding to the D50 (“primary particle area/secondary particle area”) is 0.004 to 0.035, and the minimum value of powder crushing strength that is obtained by crushing a powder using a microcompression tester is more than 70 MPa.Type: ApplicationFiled: April 16, 2013Publication date: April 2, 2015Inventors: Tetsuya Mitsumoto, Hitohiko Ide, Shinya Kagei, Yoshimi Hata
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Publication number: 20150064555Abstract: Provided is a novel negative electrode for nonaqueous electrolyte secondary batteries, which is capable of improving cycle characteristics and is also capable of suppressing aggregation of active material particles in a slurry. The negative electrode active material for nonaqueous electrolyte secondary batteries, which contains silicon and has a D50 of 0.1 ?m to 5 ?m, and the amount of water measured at 120° C. to 300° C. by the Karl-Fischer method (referred to as “amount of water”) per specific surface area (referred to as “CS”), that is, the amount of water/CS, of 0.1 to 80 ppm/(m2/cc).Type: ApplicationFiled: April 2, 2013Publication date: March 5, 2015Applicant: Mitsui Mining & Smelting Co., Ltd.Inventors: Daisuke Inoue, Yanko Marinov Todorov, Shinya Kagei
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Publication number: 20140353547Abstract: Provided is a new spinel type lithium manganese transition metal oxide for use in lithium batteries, which can increase the capacity retention ratio during cycling, and can increase the power output retention ratio during cycling. Disclosed is a spinel type lithium manganese transition metal oxide having an angle of repose of 50° to 75°, and having an amount of moisture (25° C. to 300° C.) measured by the Karl Fischer method of more than 0 ppm and less than 400 ppm.Type: ApplicationFiled: December 27, 2012Publication date: December 4, 2014Inventors: Tetsuya Mitsumoto, Hitohiko Ide, Shinya Kagei, Yoshimi Hata, Natsumi Shibamura
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Publication number: 20140329147Abstract: Provided is a lithium metal composite oxide having a layered structure, which is particularly excellent as a positive electrode active material for batteries that are mounted on electric vehicles or hybrid vehicles. Proposed is a lithium metal composite oxide having a layered structure, which is represented by general formula Li1+x(Mn?Co?Ni?)1?xO2 (0.00?X?0.07, 0.10???0.40, 0.10???0.40, and 0.30???0.75) and has a specific surface area of more than 2.0 m2/g but 5.0 m2/g or less and has an average particle size of the primary particles/crystallite size ratio of 5.7 to 18.5.Type: ApplicationFiled: November 26, 2012Publication date: November 6, 2014Inventors: Tetsuya Mitsumoto, Yasuhiro Ochi, Tomohiro Sakata, Hitohiko Ide, Yoshimi Hata, Shinya Kagei
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Publication number: 20140252268Abstract: Provided is a new 5 V class spinel exhibiting an operating potential of 4.5 V or higher (5 V class) with respect to the Li metal reference potential, having an excellent discharge capacity retention ratio at high temperatures (for example, 45° C.). Suggested is a spinel type lithium-manganese-nickel-containing composite oxide containing a crystalline phase in which a portion of Mn sites in LiMn2O4-? are substituted with Li; another metal element M1 including Ni (here, the M1 represents a metal element including at least one of Ni, Co and Fe), and another metal element M2 (here, the M2 represents a metal element including at least one of Mg, Ti, Al, Ba, Cr and Nb), and the spinel type lithium-manganese-nickel-containing composite oxide comprising a composite oxide phase containing Ni, Mn and B.Type: ApplicationFiled: August 26, 2013Publication date: September 11, 2014Inventors: Shinya Kagei, Natsumi Shibamura, Yanko Marinov Todorov, Yoshima Hata
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Publication number: 20140183406Abstract: This negative electrode active material for nonaqueous electrolyte secondary batteries contains a silicon solid solution in which one or more elements selected from among group 3 semimetal elements and metal elements, group 4 semimetal elements and metal elements (excluding silicon) and group 5 non-metallic elements and semimetal elements are solid-solved in silicon. The elements solid-solved in silicon are present more at the crystal grain boundaries than in the inner portions of the crystal grains in the silicon solid solution.Type: ApplicationFiled: June 25, 2012Publication date: July 3, 2014Applicant: Mitsui Mining & Smelting Co., Ltd.Inventors: Hitohiko Ide, Daisuke Inoue, Shinya Kagei, Natsumi Shibamura, Yasunori Tabira
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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: 20140010752Abstract: Provided is a new method for producing a positive electrode active material for lithium secondary batteries, by which even in the case of washing a spinel type lithium transition metal oxide with water or the like, the service life characteristics can be further enhanced, and the concentration of magnetic substances can be effectively reduced. Suggested is a method for producing a positive electrode active material for lithium secondary batteries, the method including a water washing step of bringing a powder of a spinel type lithium transition metal oxide into contact with a polar solvent and thereby washing the powder; and a drying step of subsequently drying the powder by heating the powder to 300° C. to 700° C. in an atmosphere containing oxygen.Type: ApplicationFiled: December 19, 2011Publication date: January 9, 2014Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Shinya Kagei, Yoshimi Hata, Yasuhiro Ochi
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Publication number: 20130337330Abstract: Regarding Spinel-type lithium manganese-based composite oxide (LMO) to be used as a positive electrode active substance material for lithium battery, a novel LMO is provided, which is capable of maintaining discharge capacity even if charging and discharging are repeated under high temperatures. An LMO in which the crystallite size is 250 nm to 350 nm, the strain is 0.085 or less and the specific surface area increase rate when placed in water at 25° and pH 7 and ultrasonically dispersed at 40 W ultrasonic intensity for 600 seconds is 10.0% or less, can prevent a decrease in the output that accompanies the repetition of charging and discharging while at a high temperature.Type: ApplicationFiled: February 29, 2012Publication date: December 19, 2013Applicant: MITSUI MINING & SMELTING CO., LTD.Inventors: Satoru Taniguchi, Shinya Kagei, Yoshimi Hata
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Publication number: 20130327979Abstract: Provided is a lithium-manganese-type solid solution positive electrode material capable of effectively suppressing gas generation in an initial cycle. Proposed is a lithium-manganese-type solid solution positive electrode material that includes a monoclinic structure of C2/m in a hexagonal structure of a space group R-3m. The lithium-manganese-type solid solution positive electrode material contains a solid solution expressed by a composition formula: xLi4/3Mn2/3O2+(1?x)LiMn?Co?Ni?O2 (in the formula, 0.2???0.6, 0???0.4, and 0.2???0.6). In the composition formula, x is equal to or more than 0.36 and less than 0.50.Type: ApplicationFiled: August 14, 2013Publication date: December 12, 2013Applicant: Mitsui Mining & Smelting Co., Ltd.Inventors: Akihiro Modeki, Yanko Marinov Todorov, Shinya Kagei
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Patent number: 8535460Abstract: A hydrogen storage alloy is provided which has an extremely low Co content, and can maintain the drain (power) performance (especially pulse discharge characteristics), activity (degree of activity), and life performance at high levels. The hydrogen storage alloy is manufactured by weighing and mixing every material for the hydrogen storage alloy so as to provide an alloy composition represented by the general formula MmNiaMnbAlcCod or MmNiaMnbAlcCodFee, and controlling the manufacturing method and manufacturing conditions so that both the a-axis length and the c-axis length of the crystal lattice are in a predetermined range. Although it is sufficient if the a-axis length of the crystal lattice is 499 pm or more and the c-axis length is 405 pm or more, by further specifying the a-axis length and c-axis length depending on the values of ABx, a hydrogen storage alloy having high durability can be provided.Type: GrantFiled: August 6, 2004Date of Patent: September 17, 2013Assignee: Mitsui Mining & Smelting Co., Ltd.Inventors: Daisuke Mukai, Shigeki Nakayama, Kiyotaka Yasuda, Shinya Kagei, Hidetoshi Inoue
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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