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公开(公告)号：US10818962B2
公开(公告)日：2020-10-27
申请号：US16106710
申请日：2018-08-21
发明人： Kazuhisa Takeda
IPC分类号： H01M2/08 , H01M2/14 , H01M4/36 , H01M4/485 , H01M4/62 , H01M4/66 , H01M10/0525 , H01M10/058 , H01M4/04 , H01M4/02
摘要： A negative electrode contains at least composite particles. The composite particles each contain a negative electrode active material particle and a coating. The coating is formed on a surface of the negative electrode active material particle. The coating contains at least a metal organic framework. The metal organic framework is formed by alternately stacking a first layer and a second layer. The first layer is formed by stacking an aromatic compound in a direction intersecting with a direction of stack of the first layer and the second layer. The aromatic compound contains two carboxylate anions. The two carboxylate anions satisfy para-positional relation. The second layer is formed of lithium ions coordinated to the carboxylate anion.
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2.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：US11527746B2
公开(公告)日：2022-12-13
申请号：US17239982
申请日：2021-04-26
IPC分类号： H01M4/1393 , H01M4/587 , H01M4/131 , H01M4/62 , H01M10/0525 , H01M4/133 , H01M4/134 , H01M4/36 , H01M4/485 , H01M4/583 , H01M4/02 , C01B32/20
摘要： A lithium ion secondary battery includes at least a positive electrode, a negative electrode, and an electrolyte solution. The negative electrode includes a negative electrode current collector and a negative electrode mixture layer. The negative electrode mixture layer is formed on a surface of the negative electrode current collector. The negative electrode mixture layer includes graphite particles, inorganic filler particles, lithium titanate particles, and a water-based binder. The inorganic filler particles have an average primary particle size that is ½ or less of an average primary particle size of the graphite particles. The lithium titanate particles have an average primary particle size of 1 μm or less. A ratio of an average primary particle size of the lithium titanate particles with respect to an average primary particle size of the inorganic filler particles is one or less.
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公开(公告)号：US10971711B2
公开(公告)日：2021-04-06
申请号：US16152703
申请日：2018-10-05
发明人： Kazuhisa Takeda , Yuji Yokoyama
IPC分类号： H01M2/16 , H01M10/0525 , H01M10/42
摘要： The separator is used in a battery. The separator includes a porous film and a columnar filler. The porous film is made of resin. The columnar filler is made of insulating ceramic. The columnar filler is filled in the porous film. The axial direction of the columnar filler is in line with the thickness direction of the porous film.
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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：US11276900B2
公开(公告)日：2022-03-15
申请号：US15782241
申请日：2017-10-12
IPC分类号： H01M50/449 , H01M10/0587 , H01M4/62 , H01M10/04 , H01M50/46 , H01M10/0565 , C08G65/08
摘要： A nonaqueous electrolyte secondary battery includes a flat wound electrode body that includes a positive electrode sheet, a negative electrode sheet, and a separator sheet, and a nonaqueous electrolyte. The wound electrode body includes a filling layer containing a thermal polymerization product of a resin having electrolyte solution swellability between the negative electrode sheet and the separator sheet.
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公开(公告)号：US11264604B2
公开(公告)日：2022-03-01
申请号：US16135268
申请日：2018-09-19
IPC分类号： H01M4/1391 , H01M10/0525 , H01M4/04 , H01M4/133 , H01M4/1393 , H01M4/48 , H01M4/36 , H01M4/587 , H01M4/02
摘要： A negative electrode material includes at least a graphite particle and a first metal oxide. The graphite particle includes at least one open pore. The graphite particle has a porosity not lower than 13% and not higher than 66%. The first metal oxide adheres to an inner wall of the open pore. The first metal oxide is lithium ion conductive and electron conductive. The first metal oxide is not smaller than 0.5 part by mass and not greater than 20 parts by mass with respect to 100 parts by mass of graphite particle.
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公开(公告)号：US10950860B2
公开(公告)日：2021-03-16
申请号：US16122607
申请日：2018-09-05
IPC分类号： H01M4/04 , H01M4/133 , H01M4/1393 , H01M4/36 , H01M4/583 , H01M4/587 , H01M4/62 , H01M10/0525 , C01B32/184 , H01M2/16 , H01M2/30 , C01B32/21 , H01M4/02
摘要： A graphite material for a negative electrode of a lithium ion secondary cell disclosed herein is substantially configured of a graphite particle in which defects enabling intercalation/deintercalation of lithium ions have been formed on a basal plane and which includes a calcium (Ca) component.
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公开(公告)号：US10811678B2
公开(公告)日：2020-10-20
申请号：US16182865
申请日：2018-11-07
摘要： According to the present invention, there is provided a negative electrode material for a lithium secondary battery, including a negative electrode active material including a carbon material and having an ID/IG ratio of XPS of 0.2 to 0.74, and a coating portion disposed on a surface of the negative electrode active material. The coating portion has a boron atom and a crosslinking site having a bonding portion of C—O—C and interposed between the boron atom and the negative electrode active material. In an XPS spectrum, when an area of the peak of the 1s electron orbital of the boron atom is denoted by Ab and an area of the peak of the C—O—C bonding portion is denoted by Ac, the ratio Ac/Ab of the peak area Ac to the peak area Ab is 0.11 or more and 0.51 or less.
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公开(公告)号：US10763498B2
公开(公告)日：2020-09-01
申请号：US16101652
申请日：2018-08-13
发明人： Kazuhisa Takeda , Yuji Yokoyama
IPC分类号： H01M4/36 , H01M4/485 , H01M4/134 , H01M4/133 , H01M10/0525 , H01M4/62 , H01M4/66 , H01M2/30 , H01M2/08 , H01M10/42 , H01M4/48 , H01M4/02
摘要： A negative electrode for a non-aqueous electrolyte secondary battery of the present disclosure includes a negative electrode current collector, a negative electrode composite material layer formed on the surface of the negative electrode current collector. The negative electrode composite material layer includes a negative electrode active material containing silicon oxide and heat expandable microcapsules. The ratio of silicon oxide to the total amount of the negative electrode active material is 30 mass % or less. The blending ratio of the heat expandable microcapsules to the total amount of the negative electrode active material is 0.5 mass % or more. The ratio of the heat expandable microcapsules in contact with silicon oxide to the amount of the heat expandable microcapsules contained in the negative electrode composite material layer is 70 mass % or more.
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