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公开(公告)号：US11901545B2
公开(公告)日：2024-02-13
申请号：US17590849
申请日：2022-02-02
IPC分类号： H01M4/02 , H01M4/36 , H01M4/62 , H01M4/48 , H01M4/38 , H01M4/131 , H01M4/1391 , H01M4/485 , H01M10/0525
CPC分类号： H01M4/131 , H01M4/1391 , H01M4/485 , H01M10/0525 , H01M2004/027
摘要： Methods for producing a negative electrode active material particle which includes a silicon compound particle containing a silicon compound that contains oxygen. The methods including preparing a silicon compound particle containing a silicon compound that contains oxygen; inserting Li into the silicon compound particle; and heating, while stirring, the Li-inserted silicon compound particle in a furnace to produce a negative electrode active material particle, wherein at least part of Si constituting the silicon compound particle is present in at least one state selected from oxide of Si2+ to Si3+ containing no Li, and compound containing Li and Si2+ to Si3+.
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公开(公告)号：US11961997B2
公开(公告)日：2024-04-16
申请号：US17290935
申请日：2019-09-25
CPC分类号： H01M4/364 , H01M4/131 , H01M4/133 , H01M4/139 , H01M4/366 , H01M4/485 , H01M4/5825 , H01M4/587 , H01M2004/021 , H01M2004/027
摘要： A negative electrode active material for a non-aqueous electrolyte secondary battery, containing negative electrode active material particles, including silicon compound particles each containing a silicon compound (SiOx: 0.5≤x≤1.6) and at least one or more of Li2SiO3 and Li2Si2O5, the material includes a phosphate, the negative electrode active material particles each have a surface containing lithium element, and a ratio mp/ml satisfies 0.02≤mp/ml≤3, where ml represents a molar quantity of the lithium element and contained per unit mass of the particles, and mp represents a molar quantity of phosphorus element contained per unit mass of the particles. Thereby, a negative electrode active material is capable of stabilizing an aqueous negative electrode slurry prepared in producing a negative electrode of a secondary battery, and capable of improving initial charge-discharge characteristics when the negative electrode active material is used for a secondary battery.
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公开(公告)号：US11283060B2
公开(公告)日：2022-03-22
申请号：US16495623
申请日：2018-05-18
IPC分类号： H01M4/02 , H01M4/36 , H01M4/62 , H01M4/48 , H01M4/38 , H01M4/131 , H01M4/1391 , H01M4/485 , H01M10/0525
摘要： A negative electrode active material contains a negative electrode active material particle which includes a silicon compound particle containing a silicon compound that contains oxygen. The silicon compound particle contains a Li compound, and at least part of Si constituting the silicon compound particle is present in at least one state selected from oxide of Si2+ to Si3+ containing no Li, and compound containing Li and Si2+ to Si3+. A negative electrode active material is capable of increasing battery capacity and improving cycle characteristics and initial charge-discharge characteristics when the negative electrode active material is used for a secondary battery. A mixed negative electrode active material contains the negative electrode active material. A method produces a negative electrode active material particle which enables production of the negative electrode active material particle to be contained in the negative electrode active material as described above.
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公开(公告)号：US11316147B2
公开(公告)日：2022-04-26
申请号：US16074286
申请日：2017-01-27
摘要： A negative electrode active material includes: particles of negative electrode active material, the particles of negative electrode active material contain particles of silicon compound containing a silicon compound (SiOx:0.5≤x≤1.6); the particles of silicon compound contain at least one kind or more of Li2SiO3 and Li4SiO4; the particles of negative electrode active material contain Li2CO3 and LiOH on a surface thereof; and a content of the Li2CO3 is 0.01% by mass or more and 5.00% by mass or less relative to a mass of the particles of negative electrode active material and a content of the LiOH is 0.01% by mass or more and 5.00% by mass or less relative to the mass of the particles of negative electrode active material. Thus a negative electrode active material is capable of improving initial charge/discharge characteristics and the cycle characteristics when used as a negative electrode active material of the secondary battery.
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公开(公告)号：US10991971B2
公开(公告)日：2021-04-27
申请号：US15768660
申请日：2016-10-24
IPC分类号： H01M4/131 , H01M4/134 , H01M4/485 , H01M10/0525 , H01M4/139 , H01M4/36 , H01M4/38 , H01M4/583 , H01M4/66 , H01M10/0587
摘要： The present disclosure relates to a negative electrode active material including: particles of negative electrode active material, wherein the particles of negative electrode active material contain particles of silicon compound containing a silicon compound (SiOx: 0.55≤x≤1.6), and the particles of silicon compound includes at least one or more kinds of Li2SiO3 and Li4SiO4; the particles of silicon compound contain nickel; and, a mass of the nickel to a mass of the particles of negative electrode active material is 2 mass ppm or more and 100 mass ppm or less. Thus, when used as the negative electrode active material of a secondary battery, a negative electrode active material capable of improving the initial charge/discharge characteristics and cycle characteristics is provided.
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公开(公告)号：US10559822B2
公开(公告)日：2020-02-11
申请号：US15768931
申请日：2016-10-27
IPC分类号： H01M10/0525 , H01M4/131 , H01M4/36 , H01M4/485 , H01M4/48 , H01M4/58 , H01M4/66 , H01M4/133 , H01M10/44 , H01M4/587 , H01M4/02
摘要： A negative electrode active material, wherein the negative electrode active material is a negative electrode active material including negative electrode active material particles; the negative electrode active material particles include silicon compound particles including a silicon compound (SiOx: 0.5≤x≤1.6); the silicon compound particles include at least any one kind or more kinds of Li2SiO3 and Li4SiO4; the negative electrode active material particles have a loose bulk density BD of 0.5 g/cm3 or more and 0.9 g/cm3 or less, a tapped bulk density TD of 0.7 g/cm3 or more and 1.2 g/cm3 or less, and a compression degree of 25% or less, the compression degree being defined by (TD−BD)/TD. Therefore, the negative electrode active material which is capable of improving the initial charge and discharge characteristics as well as the cycle characteristics upon using it as the negative electrode active material of a secondary battery is provided.
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