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1.发明申请公开(公告)号：US20180309118A1
公开(公告)日：2018-10-25
申请号：US15959902
申请日：2018-04-23
发明人： Kazuhisa Takeda , Keisuke Ohara
CPC分类号： H01M4/366 , C01B32/05 , C01G23/005 , C01P2004/80 , C01P2006/40 , H01M4/485 , H01M4/587 , H01M10/0525 , H01M2004/027
摘要： Negative electrode active material particles for a lithium ion secondary battery include base material particles and a coating. The coating covers a surface of the base material particles. The base material particles contain a first carbon material. The coating contains lithium titanate and a second carbon material. When a ratio of an intensity of a D band to an intensity of a G band in a laser Raman spectrum is set as an R value, the second carbon material has a larger R value than the first carbon material.
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公开(公告)号：US10944098B2
公开(公告)日：2021-03-09
申请号：US15957068
申请日：2018-04-19
发明人： Kazuhisa Takeda , Keisuke Ohara
IPC分类号： H01M10/0525 , H01M4/133 , H01M4/1393 , H01M4/583 , H01M4/36 , H01M4/587 , H01M4/02
摘要： A negative electrode active material particle includes natural graphite and a coating. The surface of the natural graphite is coated with the coating. The coating contains low crystalline carbon and fluorine. The low crystalline carbon has lower crystallinity than the natural graphite and a structure in which carbon hexagonal net planes are layered in a portion of the low crystalline carbon. The peak of CF2 bonds is detected by X-ray photoelectron spectroscopy of the negative electrode active material particle, and the fluorine concentration of the surface of the negative electrode active material particle is 10 atm % or more and 20 atm % or less.
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公开(公告)号：US20210296639A1
公开(公告)日：2021-09-23
申请号：US17200058
申请日：2021-03-12
发明人： Yasunori Baba , Harunari Shimamura , Keisuke Ohara , Kohei Masai , Kouhei Tsuzuki , Katsunori Yanagida , Yo Kato
摘要： The present disclosure relates to a secondary battery module including a nonaqueous electrolyte secondary battery and an elastic body. The elastic body has a compressive elastic modulus of 5 MPa to 120 MPa. The nonaqueous electrolyte secondary battery includes a positive electrode and a negative electrode. The positive electrode includes a positive electrode collector containing Ti as a main component and having a thickness of 1 μm to 8 μm. The negative electrode includes a first layer and a second layer sequentially formed from a side with the negative electrode collector. The first layer contains negative electrode active material particles containing first carbon-based active material particles with a 10% proof stress of 3 MPa or less. The second layer contains negative electrode active material particles containing second carbon-based active material particles with a 10% proof stress of 5 MPa or greater.
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公开(公告)号：US10581049B2
公开(公告)日：2020-03-03
申请号：US15304654
申请日：2015-04-15
IPC分类号： H01M2/16 , H01M10/0525 , H01M10/05 , H01M2/34 , H01M10/0587 , H01M10/42
摘要： A nonaqueous electrolyte secondary battery (100) includes a positive electrode (30), a negative electrode (40), a separator (50), a nonaqueous electrolytic solution, and a battery case (10). The positive electrode includes a positive electrode current collector (32) and a positive electrode active material layer (34). The separator includes a separator substrate (52) and a heat resistance layer (54). The separator substrate has an opposite surface opposite the positive electrode active material layer. The heat resistance layer constitutes at least a part of the opposite surface and contains a heat-resistant filler and a binder. The positive electrode active material layer has an adjacent region (X). The heat resistance layer has an opposite region (Y) opposite at least an end portion of the adjacent region. The end portion of the adjacent region is adjacent to a positive electrode current collector exposure portion (33). The opposite region contains at least a calcium salt of carboxymethyl cellulose.
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公开(公告)号：US10454098B2
公开(公告)日：2019-10-22
申请号：US15325639
申请日：2015-05-29
摘要： A nonaqueous electrolyte secondary battery includes a positive electrode, a negative electrode, a separator provided between the positive electrode and the negative electrode, and a nonaqueous electrolytic solution at least held by the separator. The positive electrode has a positive electrode collector and a positive electrode mixture layer provided on the positive electrode collector. The positive electrode mixture layer has a first powder and a second powder. The first powder includes a first positive electrode active material, a first conductive material, and an organic-based binder. The second powder includes a second positive electrode active material, a second conductive material, and a water-based binder.
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公开(公告)号：US10026941B2
公开(公告)日：2018-07-17
申请号：US15039688
申请日：2014-11-26
IPC分类号： H01M2/16 , H01M10/052
摘要： A separator 1 for a nonaqueous electrolyte secondary battery, includes a resin-made substrate (2) and a porous heat resistance layer (4) disposed on the substrate. The porous heat resistance layer includes an inorganic filler (6) and hollow bodies (7). The hollow body includes a shell portion and a hollow portion. The shell portion is formed of an acryl resin. The hollow portion is formed inside the shell portion. An opening portion extending through the shell portion to spatially interconnect the hollow portion and the outside of the shell portion is formed in the shell portion.
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公开(公告)号：US11011738B2
公开(公告)日：2021-05-18
申请号：US15782466
申请日：2017-10-12
发明人： Kazuhisa Takeda , Yuji Yokoyama , Keisuke Ohara
摘要： Provided is a method for producing a negative electrode by using a negative electrode active material and ceramic particles, the method ensuring satisfactory coatability of the paste and high peel strength and hardness of the obtained negative electrode active material layer. The method for producing a negative electrode disclosed herein includes a step of coating a negative electrode paste including a negative electrode active material and ceramic particles on a negative electrode current collector; a step of drying the coated negative electrode paste to form a negative electrode active material layer; and a step of pressing the negative electrode active material layer. The ceramic particles have an aspect ratio of 1.5 or more and 20 or less. The ceramic particles have a short side length of ⅕ or less of an average particle diameter of the negative electrode active material. In the negative electrode paste, the ceramic particles are contained in an amount of 3% by mass to 20% by mass based on a total solid content of the negative electrode paste.
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公开(公告)号：US10056617B2
公开(公告)日：2018-08-21
申请号：US14909366
申请日：2014-07-30
IPC分类号： H01M4/62 , H01M4/36 , H01M10/42 , H01M10/0525 , H01M10/0567 , H01M10/0587 , H01M2/34 , H01M4/13 , H01M10/04
CPC分类号： H01M4/628 , H01M2/345 , H01M4/13 , H01M4/366 , H01M4/622 , H01M10/0431 , H01M10/0525 , H01M10/0567 , H01M10/0587 , H01M10/4235 , H01M2200/20
摘要： A secondary battery includes a wound electrode assembly in which a positive electrode sheet, a negative electrode sheet and a separator are stacked and wound. The positive electrode sheet is provided with a long positive electrode current collector and a positive electrode active material layer. The positive electrode active material layer is disposed on the positive electrode current collector. The negative electrode sheet is provided with a long negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is disposed on the negative electrode current collector. The separator is interposed between the positive electrode sheet and the negative electrode sheet. The negative electrode current collector has a first active material layer-free region at one edge of the negative electrode current collector in a winding direction of an axis of the wound electrode assembly. The first active material layer-free region is a region where the negative electrode active material layer is not formed. The positive electrode current collector has a second active material layer-free region at one edge of the positive electrode current collector in a winding direction of an axis of the wound electrode assembly. The second active material layer-free region is a region where the positive electrode active material layer is not formed. The negative electrode current collector and the positive electrode current collector are disposed, with the first active material layer-free region and the second active material layer-free region being projected toward opposite sides in the winding direction of the axis of the wound electrode assembly. A width of the negative electrode active material layer is wider than a width of the positive electrode active material layer and a bacterial cellulose is disposed in at least a surface layer of the negative electrode active material layer that faces the second active material layer-free region.
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公开(公告)号：US11817577B2
公开(公告)日：2023-11-14
申请号：US17200058
申请日：2021-03-12
发明人： Yasunori Baba , Harunari Shimamura , Keisuke Ohara , Kohei Masai , Kouhei Tsuzuki , Katsunori Yanagida , Yo Kato
CPC分类号： H01M4/366 , H01M4/583 , H01M50/46 , H01M50/471 , H01M2004/027 , H01M2004/028
摘要： The present disclosure relates to a secondary battery module including a nonaqueous electrolyte secondary battery and an elastic body. The elastic body has a compressive elastic modulus of 5 MPa to 120 MPa. The nonaqueous electrolyte secondary battery includes a positive electrode and a negative electrode. The positive electrode includes a positive electrode collector containing Ti as a main component and having a thickness of 1 μm to 8 μm. The negative electrode includes a first layer and a second layer sequentially formed from a side with the negative electrode collector. The first layer contains negative electrode active material particles containing first carbon-based active material particles with a 10% proof stress of 3 MPa or less. The second layer contains negative electrode active material particles containing second carbon-based active material particles with a 10% proof stress of 5 MPa or greater.
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公开(公告)号：US11133525B2
公开(公告)日：2021-09-28
申请号：US16377763
申请日：2019-04-08
发明人： Ryosuke Ohsawa , Keisuke Ohara , Akihiro Taniguchi , Kaoru Inoue
IPC分类号： H01M4/48 , H01M4/131 , H01M4/1391 , H01M10/0525 , H01M10/0568 , H01M10/058 , H01M4/02
摘要： A lithium-ion secondary battery includes at least a negative electrode, a positive electrode, and an electrolyte solution. The negative electrode includes at least negative electrode active material particles. Each of the negative electrode active material particles contains at least a SiOx particle and a Si layer. The Si layer covers a surface of the SiOx particle. The Si layer has a thickness not smaller than 10 nm and not greater than 100 nm. The electrolyte solution contains at least one selected from the group consisting of FEC and VC.
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