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公开(公告)号：US09774034B2
公开(公告)日：2017-09-26
申请号：US14553674
申请日：2014-11-25
发明人： Takahiro Kawakami , Mayumi Mikami , Shunsuke Adachi , Shuhei Yoshitomi , Teruaki Ochiai , Yumiko Yoneda , Yohei Momma , Satoshi Seo
CPC分类号： H01M4/505 , C01G45/1228 , C01G53/50 , C01P2002/80 , C01P2002/85 , C01P2002/89 , C01P2004/04 , H01M4/366 , H01M4/525 , H01M4/5825
摘要： To increase the amount of lithium ions that can be received in and released from a positive electrode active material to achieve high capacity and high energy density of a secondary battery. A lithium manganese oxide particle includes a first region and a second region. The valence number of manganese in the first region is lower than the valence number of manganese in the second region. The lithium manganese oxide has high structural stability and high capacity characteristics.
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12.发明申请LITHIUM MANGANESE OXIDE COMPOSITE, SECONDARY BATTERY, AND MANUFACTURING METHOD THEREOF 有权锂锰氧化物复合材料，二次电池及其制造方法公开(公告)号：US20140332715A1
公开(公告)日：2014-11-13
申请号：US14272718
申请日：2014-05-08
发明人： Takahiro KAWAKAMI , Shuhei Yoshitomi , Teruaki Ochiai , Satoshi Seo , Yohei Momma , Yumiko Saito
CPC分类号： H01B1/08 , C01G45/1242 , C01G45/1257 , C01P2002/72 , C01P2002/76 , C01P2004/80 , C01P2006/40 , H01M4/131 , H01M4/364 , H01M4/366 , H01M4/505 , Y02P70/54
摘要： To increase the amount of lithium ions that can be received and released in and from a positive electrode active material to achieve high capacity and high energy density of a secondary battery. A composite material of crystallites of LiMn2O4 (crystallites with a spinel crystal structure) and crystallites of Li2MnO3 (crystallites with a layered rock-salt crystal structure) is used as a positive electrode active material. The lithium manganese oxide composite has high structural stability and high capacity.
摘要翻译： 为了增加可以从正极活性物质中吸收和释放的锂离子的量，以实现二次电池的高容量和高能量密度。 使用LiMn2O4（具有尖晶石晶体结构的微晶）和Li2MnO3微晶（具有层状岩盐晶体结构的微晶）的微晶复合材料作为正极活性物质。 该锰酸锂复合材料具有结构稳定性高，容量大的特点。
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公开(公告)号：US11799080B2
公开(公告)日：2023-10-24
申请号：US16611791
申请日：2018-05-11
发明人： Mayumi Mikami , Aya Uchida , Yumiko Yoneda , Yohei Momma , Masahiro Takahashi , Teruaki Ochiai
IPC分类号： H01B1/08 , H01M4/525 , C01G53/00 , H01M4/131 , H01M4/133 , H01M4/134 , H01M4/36 , H01M4/505 , H01M6/16 , H01M10/0525 , H01M4/139 , H01M4/02
CPC分类号： H01M4/525 , C01G53/50 , H01B1/08 , H01M4/131 , H01M4/133 , H01M4/134 , H01M4/139 , H01M4/366 , H01M4/505 , H01M6/164 , H01M10/0525 , C01P2002/74 , H01M2004/028
摘要： A positive electrode active material having high capacity and excellent cycle performance is provided. The positive electrode active material has a small difference in a crystal structure between the charged state and the discharged state. For example, the crystal structure and volume of the positive electrode active material, which has a layered rock-salt crystal structure in the discharged state and a pseudo-spinel crystal structure in the charged state at a high voltage of approximately 4.6 V, are less likely to be changed by charge and discharge as compared with those of a known positive electrode active material.
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14.发明授权公开(公告)号：US11710823B2
公开(公告)日：2023-07-25
申请号：US17852407
申请日：2022-06-29
发明人： Takahiro Kawakami , Teruaki Ochiai , Shuhei Yoshitomi , Takuya Hirohashi , Mako Motoyoshi , Yohei Momma , Junya Goto
IPC分类号： H01M4/505 , H01M4/36 , H01M4/131 , H01M4/1391
CPC分类号： H01M4/505 , H01M4/131 , H01M4/1391 , H01M4/366 , H01M2220/30
摘要： To increase capacity per weight of a power storage device, a particle includes a first region, a second region in contact with at least part of a surface of the first region and located on the outside of the first region, and a third region in contact with at least part of a surface of the second region and located on the outside of the second region. The first and the second regions contain lithium and oxygen. At least one of the first region and the second region contains manganese. At least one of the first and the second regions contains an element M. The first region contains a first crystal having a layered rock-salt structure. The second region contains a second crystal having a layered rock-salt structure. An orientation of the first crystal is different from an orientation of the second crystal.
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公开(公告)号：US11699794B2
公开(公告)日：2023-07-11
申请号：US17731538
申请日：2022-04-28
发明人： Teruaki Ochiai , Takahiro Kawakami , Takuya Miwa
IPC分类号： H01M4/00 , H01M4/66 , H01M4/131 , H01M4/587 , H01M4/36 , H01M4/62 , H01G11/50 , H01G11/36 , H01G11/86 , H01G11/38 , H01M10/0525
CPC分类号： H01M4/663 , H01G11/36 , H01G11/38 , H01G11/50 , H01G11/86 , H01M4/131 , H01M4/366 , H01M4/587 , H01M4/625 , H01M10/0525
摘要： A novel electrode is provided. A novel power storage device is provided. A conductor having a sheet-like shape is provided. The conductor has a thickness of greater than or equal to 800 nm and less than or equal to 20 μm. The area of the conductor is greater than or equal to 25 mm2 and less than or equal to 10 m2. The conductor includes carbon and oxygen. The conductor includes carbon at a concentration of higher than 80 atomic % and oxygen at a concentration of higher than or equal to 2 atomic % and lower than or equal to 20 atomic %.
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公开(公告)号：US11444274B2
公开(公告)日：2022-09-13
申请号：US16914539
申请日：2020-06-29
发明人： Masahiro Takahashi , Teruaki Ochiai , Yohei Momma , Ayae Tsuruta
摘要： A positive electrode active material particle with little deterioration is provided. A power storage device with little deterioration is provided. A highly safe power storage device is provided. The positive electrode active material particle includes a first crystal grain, a second crystal grain; and a crystal grain boundary positioned between the crystal grain and the second crystal grain; the first crystal grain and the second crystal grain include lithium, a transition metal, and oxygen; the crystal grain boundary includes magnesium and oxygen; and the positive electrode active material particle includes a region where the ratio of the atomic concentration of magnesium in the crystal grain boundary to the atomic concentration of the transition metal in first crystal grain and the second crystal grain is greater than or equal to 0.010 and less than or equal to 0.50.
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公开(公告)号：US11322746B2
公开(公告)日：2022-05-03
申请号：US16936566
申请日：2020-07-23
发明人： Teruaki Ochiai , Takahiro Kawakami , Takuya Miwa
IPC分类号： H01M4/00 , H01M4/66 , H01M4/131 , H01M4/587 , H01M4/36 , H01M4/62 , H01G11/50 , H01G11/36 , H01G11/86 , H01G11/38 , H01M10/0525
摘要： A novel electrode is provided. A novel power storage device is provided. A conductor having a sheet-like shape is provided. The conductor has a thickness of greater than or equal to 800 nm and less than or equal to 20 μm. The area of the conductor is greater than or equal to 25 mm2 and less than or equal to 10 m2. The conductor includes carbon and oxygen. The conductor includes carbon at a concentration of higher than 80 atomic % and oxygen at a concentration of higher than or equal to 2 atomic % and lower than or equal to 20 atomic %.
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公开(公告)号：US10249876B2
公开(公告)日：2019-04-02
申请号：US15874123
申请日：2018-01-18
发明人： Takahiro Kawakami , Tatsuya Ikenuma , Teruaki Ochiai , Shuhei Yoshitomi , Mako Motoyoshi , Hiroyuki Miyake , Yohei Momma , Takuya Hirohashi , Satoshi Seo
IPC分类号： H01M4/505 , H01M4/485 , H01M4/48 , H01M4/62 , H01M4/583 , G06F1/16 , G04G21/00 , G04C10/00 , H01M4/36 , H01M4/525 , H01M10/052
摘要： A lithium-ion secondary battery with high capacity is provided. Alternatively, a lithium-ion secondary battery with unproved cycle characteristics is provided. To achieve this, an active material including a particle having a cleavage plane and a layer containing carbon covering at least part of the cleavage plane is provided. The particle having the cleavage plane contains lithium, manganese, nickel, and oxygen. The layer containing carbon preferably contains graphene. When a lithium-ion secondary battery is fabricated using an electrode including the particle having the cleavage plane at least part of which is covered with the layer containing carbon as an active material, the discharge capacity can be increased and the cycle characteristics can be improved.
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公开(公告)号：US09368638B2
公开(公告)日：2016-06-14
申请号：US14541165
申请日：2014-11-14
IPC分类号： H01L29/04 , H01L31/036 , H01L31/0376 , H01L31/20 , H01L29/786 , H01L29/45
CPC分类号： H01L29/7869 , H01L29/45
摘要： An object is to provide a highly reliable transistor and a semiconductor device including the transistor. A semiconductor device including a gate electrode; a gate insulating film over the gate electrode; an oxide semiconductor film over the gate insulating film; and a source electrode and a drain electrode over the oxide semiconductor film, in which activation energy of the oxide semiconductor film obtained from temperature dependence of a current (on-state current) flowing between the source electrode and the drain electrode when a voltage greater than or equal to a threshold voltage is applied to the gate electrode is greater than or equal to 0 meV and less than or equal to 25 meV, is provided.
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公开(公告)号：US12080893B2
公开(公告)日：2024-09-03
申请号：US18202523
申请日：2023-05-26
发明人： Teruaki Ochiai , Takahiro Kawakami , Takuya Miwa
IPC分类号： H01M4/00 , H01G11/36 , H01G11/38 , H01G11/50 , H01G11/86 , H01M4/131 , H01M4/36 , H01M4/587 , H01M4/62 , H01M4/66 , H01M10/0525
CPC分类号： H01M4/663 , H01G11/36 , H01G11/38 , H01G11/50 , H01G11/86 , H01M4/131 , H01M4/366 , H01M4/587 , H01M4/625 , H01M10/0525
摘要： A novel electrode is provided. A novel power storage device is provided. A conductor having a sheet-like shape is provided. The conductor has a thickness of greater than or equal to 800 nm and less than or equal to 20 μm. The area of the conductor is greater than or equal to 25 mm2 and less than or equal to 10 m2. The conductor includes carbon and oxygen. The conductor includes carbon at a concentration of higher than 80 atomic % and oxygen at a concentration of higher than or equal to 2 atomic % and lower than or equal to 20 atomic %.
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