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公开(公告)号：US20240228316A9
公开(公告)日：2024-07-11
申请号：US18278436
申请日：2022-03-17
发明人： Masahiro YOSHIDA , Hidefumi FUJITA , Koji TANOUE
IPC分类号： C01G33/00
CPC分类号： C01G33/00 , C01P2004/60 , C01P2004/82 , C01P2006/40 , C01P2006/80
摘要： A powder contains a niobium complex and lithium, an amount of niobium being 25 mass % or more and 75 mass % or less, a proportion of niobium in metal elements of the powder is 0.775 or more and 0.950 or less in terms of mass ratio. When the powder is dissolved in 8 times its mass of water at 25° C., a niobium content contained in a filtrate thereof is 80 mass % or more of an amount of niobium contained in the powder before dissolution. The powder is obtained by mixing a niobium compound, a lithium compound, an alkali, hydrogen peroxide, and water to obtain an aqueous solution containing a niobium complex and lithium and then drying the solution at a temperature equal to or lower than a decomposition temperature of the niobium complex. The powder is suitable for preparing a lithium niobate precursor solution for coating positive electrode active material particles.
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公开(公告)号：US20220392676A1
公开(公告)日：2022-12-08
申请号：US17773865
申请日：2020-11-19
发明人： Hidefumi FUJITA , Koji TANOUE , Keisuke YAMADA , Tetsuya KAWAHITO
摘要： A silicon oxide-coated soft magnetic powder, in which the ratio of a volume-based cumulative 50% particle diameter D50 (HE) according to a dry laser diffraction particle size distribution analysis to the same particle diameter D50 (MT) according to a wet laser diffraction particle size distribution analysis is 0.7 or more, and a coverage ratio R defined by R=Si×100/(Si+M) (Si and M are molar fractions of Si and elements constituting the soft magnetic powder) is 70% or more is obtained by subjecting a slurry containing a soft magnetic powder containing 20 mass % or more of iron and a hydrolysate of a silicon alkoxide to a dispersion treatment when the surface of the soft magnetic powder is coated with the hydrolysate in a mixed solvent of water and an organic substance. The powder has good insulation/dispersibility properties and a high filling factor during molding.
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公开(公告)号：US20220262551A1
公开(公告)日：2022-08-18
申请号：US17628295
申请日：2020-08-26
发明人： Yorito NISHIZAWA , Koji TANOUE
摘要： Silicon oxide-coated Fe-based soft magnetic powder having a high insulation capability can be obtained in such a manner that Fe-based soft magnetic powder is dispersed in a mixed solvent of water and an alcohol having a Hansen solubility parameter (SP value) of 11.3 or less, containing 5% by mass or more and 50% by mass or less of water, so as to provide a slurry. Then, a silicon alkoxide and a hydrolysis catalyst for the silicon alkoxide are added to the slurry to coat a silicon oxide thereon. The silicon oxide-coated Fe-based soft magnetic powder is capable of providing a powder compact having a high volume resistivity in molding into a powder compact. A method of producing the same is also disclosed.
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4.发明申请公开(公告)号：US20190097216A1
公开(公告)日：2019-03-28
申请号：US16082794
申请日：2017-03-09
发明人： Yoshiaki AIKI , Toshihiko UEYAMA , Koji TANOUE
IPC分类号： H01M4/36 , C01G33/00 , C01G51/00 , H01M10/0525 , H01M4/131 , H01M4/485 , H01M4/1391
摘要： There is provided a solution containing lithium and at least one of a niobium complex and a titanium complex, suppresses corrosiveness, excellent in storage stability, and suitable for forming a coating layer capable of improving battery characteristics of an active material, and a related technique, which is the solution containing lithium, at least one of a niobium complex and a titanium complex, and ammonia, wherein an amount of the ammonia in the solution is 1 mass % or less.
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公开(公告)号：US20230051009A1
公开(公告)日：2023-02-16
申请号：US17878460
申请日：2022-08-01
发明人： Masahiro YOSHIDA , Hidefumi FUJITA , Koji TANOUE , Kazuki MURAISHI , Masaru KUBOTA , Yuki ISHIGAKI
摘要： Provided is a lithium-containing oxide precursor solution for coating an electrode active material that is capable of improving the coverage of a coating layer that is formed by applying the lithium-containing oxide precursor solution to the surface of powder of the electrode active material and king it, and that is easy to handle in a normal atmosphere because a solution composed mainly of water is used as a solvent. The lithium-containing oxide precursor solution for coating an electrode active material includes Li in an amount of 0.1 mass % or more and 5.0 mass % or less, at least one element selected from Nb, F, Fe, P, Ta, V, Ge, B, Al, Ti, Si, W, Zr, Mo, S, Cl, Br, and I in an amount of 0.05 mass % or more and 35 mass % or less, and water in an amount of 60 mass % or more and 98.4 mass % or less. The value of absorbance of the solution at a wavelength of 660 nm is 0.1 or less, and the value of surface energy thereof is 72 mN/m or less.
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公开(公告)号：US20230045543A1
公开(公告)日：2023-02-09
申请号：US17872293
申请日：2022-07-25
发明人： Kazuki MURAISHI , Masaru KUBOTA , Yuki ISHIGAKI , Masahiro YOSHIDA , Hidefumi FUJITA , Koji TANOUE
IPC分类号： C01G33/00 , H01M10/0525 , C01B25/30
摘要： Provided are a coated active material having excellent properties that can reduce the reaction resistance of a battery, and a method for producing a coated active material that can achieve both a high processing speed and high processing quality. The method for producing a coated active material includes: mixing an electrode active material and a coating solution containing Li and an element M and having a surface energy of 72 mN/m or less to prepare a slurry; and drying the slurry in an air flow and thereby causing a Li-containing oxide to adhere to at least a portion of the surface of the electrode active material, to obtain a coated active material, where the element M is at least one element selected from Nb, F, Fe, P, Ta, V, Ge, B, Al, Ti, Si, W, Zr, Mo, S, Cl, Br, and I.
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公开(公告)号：US20220231287A1
公开(公告)日：2022-07-21
申请号：US17712786
申请日：2022-04-04
发明人： Yoshiaki AIKI , Toshihiko UEYAMA , Koji TANOUE
IPC分类号： H01M4/36 , C01G33/00 , C01G23/00 , H01M4/525 , H01M4/62 , H01M4/505 , C01G51/00 , H01M4/131 , H01M4/1391 , H01M4/485 , H01M10/0525
摘要： A producing method of a solution that contains lithium, at least one of a niobium complex and a titanium complex, and ammonia, wherein an amount of the ammonia in the solution is 0.3 mass % or less. The solution is suitable for forming a coating layer capable of improving battery characteristics of an active material in a battery.
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公开(公告)号：US20240132368A1
公开(公告)日：2024-04-25
申请号：US18278436
申请日：2022-03-16
发明人： Masahiro YOSHIDA , Hidefumi FUJITA , Koji TANOUE
IPC分类号： C01G33/00
CPC分类号： C01G33/00 , C01P2004/60 , C01P2004/82 , C01P2006/40 , C01P2006/80
摘要： A powder contains a niobium complex and lithium, an amount of niobium being 25 mass % or more and 75 mass % or less, a proportion of niobium in metal elements of the powder is 0.775 or more and 0.950 or less in terms of mass ratio. When the powder is dissolved in 8 times its mass of water at 25° C., a niobium content contained in a filtrate thereof is 80 mass % or more of an amount of niobium contained in the powder before dissolution. The powder is obtained by mixing a niobium compound, a lithium compound, an alkali, hydrogen peroxide, and water to obtain an aqueous solution containing a niobium complex and lithium and then drying the solution at a temperature equal to or lower than a decomposition temperature of the niobium complex. The powder is suitable for preparing a lithium niobate precursor solution for coating positive electrode active material particles.
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公开(公告)号：US20210060642A1
公开(公告)日：2021-03-04
申请号：US16963602
申请日：2019-02-15
发明人： Koji TANOUE , Takuya YANO , Yorito NISHIZAWA
摘要： A silicon oxide-coated soft magnetic powder has excellent insulating property and provides a high powder compact density. In making the powder, silicon alkoxide is added to a slurry containing soft magnetic powder containing iron in an amount of 20% by mass or more dispersed in a mixed solvent of water and an organic solvent containing water in an amount of 1% by mass or more and 40% by mass or less. A hydrolysis catalyst for the silicon alkoxide is then added to perform silicon oxide coating. The coated magnetic powder has a coverage factor R of 70% or more defined by R=Si×100/(Si+M) (wherein Si and M represent molar fractions of Si and elements constituting the soft magnetic powder obtained by an XPS measurement), a powder compact density of 4.0 g/cm3 or more, and high μ′ at high frequency and high insulating property.
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10.发明申请公开(公告)号：US20190229333A1
公开(公告)日：2019-07-25
申请号：US16313733
申请日：2017-06-28
发明人： Yoshiaki AIKI , Toshihiko UEYAMA , Koji TANOUE
IPC分类号： H01M4/485 , C01G33/00 , C01G23/00 , H01M10/0525
摘要： There is provided a solution containing lithium and at least one of a niobium complex and a titanium complex, excellent in storage stability, and suitable for forming a coating layer capable of improving battery characteristics of an active material, and a related technique, which is the solution containing lithium, at least one of a niobium complex and a titanium complex, and ammonia, wherein an amount of the ammonia in the solution is 0.2 mass % or less.
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