-
公开(公告)号：US12074319B2
公开(公告)日：2024-08-27
申请号：US17421522
申请日：2019-12-26
IPC分类号： H01M4/133 , C01B33/113 , H01M4/131 , H01M4/1391 , H01M4/1393 , H01M4/38 , H01M10/0525 , H01M4/02
CPC分类号： H01M4/386 , C01B33/113 , H01M4/131 , H01M4/133 , H01M4/1391 , H01M4/1393 , H01M10/0525 , C01P2002/74 , H01M2004/027
摘要： The inventive negative electrode active material for a non-aqueous electrolyte secondary battery contains negative electrode active material particles which include silicon compound (SiOx: 0.5≤x≤1.6) particles. The negative electrode active material particles are at least partially coated with a carbon material, contain one or more selected from Li2SiO3 and Li2Si2O5, and satisfy Ib/Ia≤4.8 and Ic/Ia≤6.0 in an X-ray diffraction measurement using a Cu-Kα line. Ia represents an intensity of a peak around 2θ=28.4° attributable to Si obtained by the X-ray diffraction. Ib represents a peak intensity of a peak attributable to Li2SiO3 obtained by the X-ray diffraction. Ic represents a peak intensity of a peak attributable to Li2Si2O5 obtained by the X-ray diffraction. Thus, the present invention provides a negative electrode active material for a non-aqueous electrolyte secondary battery, which is stable over a long period even in an aqueous slurry and enables high capacity, favorable cycle characteristics and first-time efficiency.
-
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.
-
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.
-
公开(公告)号：US11165058B2
公开(公告)日：2021-11-02
申请号：US16332136
申请日：2017-08-23
发明人： Takakazu Hirose , Kohta Takahashi , Takumi Matsuno , Reiko Sakai
摘要： A negative electrode active material contains a negative electrode active material particle; the negative electrode active material particle including a silicon compound particle containing a silicon compound (SiOx: 0.5≤x≤1.6), wherein the silicon compound particle contains a Li compound, and the negative electrode active material particle contains at least one kind of salt selected from salts of polyacrylic acid and salts of carboxymethyl cellulose, together with a metal salt containing at least one kind of metal selected from Mg and Al. This provides a negative electrode active material that is capable of stabilizing slurry that is produced in production of a negative electrode for a secondary battery, and improving initial charge-discharge characteristics and cycle performance when it is used as a negative electrode active material for a secondary battery.
-
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+.
-
公开(公告)号：US10559812B2
公开(公告)日：2020-02-11
申请号：US16063016
申请日：2016-12-16
IPC分类号： H01M4/133 , H01M4/485 , H01M4/36 , H01M4/38 , H01M4/48 , H01M10/052 , C01B33/113 , H01M10/0525 , H01M4/134
摘要： A negative electrode active material for nonaqueous electrolyte secondary batteries including: a particle of negative electrode active material, wherein the particle of negative electrode active material contains a particle of silicon compound containing a silicon compound (SiOx:0.5≤x≤1.6), on at least a part of a surface of the silicon compound a carbon coating film being formed, and the negative electrode active material contains 2% by mass or less of particle of silicon dioxide and the negative electrode active material contains a silicon dioxide-carbon composite secondary particle containing a plurality of the particles of silicon dioxide and carbon. As a result, the negative electrode active material for nonaqueous electrolyte secondary batteries capable of increasing battery capacity and improving the cycle characteristics and battery initial efficiency is provided.
-
公开(公告)号：US10535872B2
公开(公告)日：2020-01-14
申请号：US15575183
申请日：2016-04-21
摘要： A negative electrode active material that includes negative electrode active material particles that contain a silicon compound that contains a Li compound. The silicon compound is at least partially coated with a carbon coating, and the negative electrode active material particles are coated with a coating composed of at least one of a compound having a boron-fluorine bond and a compound having a phosphorous-fluorine bond on at least a part of the surface of either or both of the silicon compound and the carbon coating. The negative electrode active material particles contain a boron or a phosphorous element in a range of 10 to 10000 ppm by mass with respect to the total amount of negative electrode active material particles. These features can provide for a negative electrode active material that can increase battery capacity and improve cycle performance in a non-aqueous electrolyte secondary battery.
-
公开(公告)号：US10446837B2
公开(公告)日：2019-10-15
申请号：US15015433
申请日：2016-02-04
IPC分类号： H01M4/36 , H01M4/134 , H01M4/38 , H01M4/485 , H01M4/587 , H01M4/62 , H01M10/052 , H01M10/0525 , H01M4/583 , H01M4/48
摘要： A negative electrode active material for a non-aqueous electrolyte secondary battery, including negative electrode active material particles containing a silicon compound expressed by SiOx where 0.5≤x≤1.6, the negative electrode active material particles at least partially coated with a carbon coating, the carbon coating exhibiting a specific surface area ranging from 5 m2/g to 1000 m2/g, the specific surface area being measured by a multipoint BET method after the carbon coating is separated from the negative electrode active material particles, the carbon coating exhibiting a compression resistivity ranging from 1.0×10−3 Ω·cm to 1.0 Ω·cm when the carbon coating is compressed so as to have a density of 1.0 g/cm3, the compression resistivity being measured after the carbon coating is separated from the negative electrode active material particles. This negative electrode active material can increase the battery capacity and improve the cycle performance and battery initial efficiency.
-
公开(公告)号：US09831495B2
公开(公告)日：2017-11-28
申请号：US15003902
申请日：2016-01-22
CPC分类号： H01M4/366 , H01M4/364 , H01M4/386 , H01M4/483 , H01M4/485 , H01M4/587 , H01M4/625 , H01M10/052 , H01M2004/021 , H01M2004/027
摘要： The present invention provides a negative electrode active material for a non-aqueous electrolyte secondary battery, including negative electrode active material particles containing a silicon compound expressed by SiOx where 0.5≦x≦1.6, the negative electrode active material particles at least partially coated with a carbon coating, the carbon coating exhibiting a peak at 2θ=25.5° having a half width of 1.5° to 4.5° in an X-ray diffraction spectrum measured after separating the carbon coating from the negative electrode active material particles, the carbon coating exhibiting scattering peaks at 1330 cm−1 and 1580 cm−1 in Raman spectrum obtained by Raman spectrometry measured after separating the carbon coating from the negative electrode active material particles, wherein a ratio of an intensity of the scattering peak at 1330 cm−1 to that at 1580 cm−1 satisfies 0.7
-
公开(公告)号：US11990603B2
公开(公告)日：2024-05-21
申请号：US16477686
申请日：2018-02-26
发明人： Takumi Matsuno , Takakazu Hirose , Kohta Takahashi
IPC分类号： H01M4/36 , H01M4/02 , H01M4/131 , H01M4/133 , H01M4/134 , H01M4/38 , H01M4/525 , H01M10/0525
CPC分类号： H01M4/134 , H01M4/131 , H01M4/133 , H01M4/364 , H01M4/525 , H01M10/0525 , H01M2004/027
摘要： A negative electrode material containing a negative electrode active material particle which includes a silicon compound particle containing a silicon compound (SiOx: 0.5≤x≤1.6). The silicon compound particle contains at least one or more of Li2SiO3 and Li4SiO4, and the negative electrode material further contains at least one of a metal compound particle containing a metal compound and an aggregate of the metal compound particle. The negative electrode material is capable of stabilizing a slurry prepared in production of a negative electrode for a secondary battery, and improving initial charge-discharge characteristics and cycle characteristics when it is used as a negative electrode active material for a secondary battery.
-
-
-
-
-
-
-
-
-
搜索结果
18 条记录 (耗时 0.031 秒)
