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公开(公告)号:US20240405201A1
公开(公告)日:2024-12-05
申请号:US18695547
申请日:2022-09-13
Inventor: Yosuke Sato , Keita Okazaki , Yukiho Okuno
IPC: H01M4/36 , H01M4/02 , H01M4/133 , H01M4/134 , H01M4/136 , H01M4/38 , H01M4/58 , H01M4/587 , H01M4/62 , H01M10/0525
Abstract: A secondary battery disclosed herein includes a positive electrode, and a negative electrode containing a negative electrode active material. The negative electrode active material contains a carbon material and a silicon-containing material. The average particle diameter of the silicon-containing material is smaller than the average particle diameter of the carbon material. The average circularity of the silicon-containing material is smaller than the average circularity of the carbon material.
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公开(公告)号:US20240396019A1
公开(公告)日:2024-11-28
申请号:US18695544
申请日:2022-09-13
Inventor: Yosuke Sato , Keita Okazaki , Yukiho Okuno
Abstract: A secondary battery disclosed herein includes a positive electrode, and a negative electrode containing a negative electrode active material. The negative electrode active material contains a carbon material and a silicon-containing material. The silicon-containing material includes a first silicon-containing material and a second silicon-containing material. The average particle diameter of the first silicon-containing material and the average particle diameter of the second silicon-containing material are each smaller than the average particle diameter of the carbon material. The average circularity Zc of the carbon material, the average circularity Zs1 of the first silicon-containing material, and the average circularity Zs2 of the second silicon-containing material satisfy Zs1
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公开(公告)号:US20240396015A1
公开(公告)日:2024-11-28
申请号:US18692502
申请日:2022-08-22
Inventor: Takashi Tsukasaki , Yosuke Sato
Abstract: Provided is a high-capacity, long-life lithium-ion secondary battery. A lithium ion secondary battery that is an example of an embodiment comprises a positive electrode, a negative electrode, a separator that separates the positive electrode and the negative electrode from each other, and an electrolyte, wherein the negative electrode has a negative electrode collector and a negative electrode mixture layer formed on the surface of the negative electrode collector, the negative electrode mixture layer includes a negative electrode active material having a discharge capacity of 400-750 mAh/g and a conductive agent, the negative electrode active material includes a carbon-based material and a silicon-based material, the negative electrode current collector has a thickness of 4-12 μm, the negative electrode current collector has a 1% yield strength of 300-700 MPa, and the conductive agent includes carbon nanotubes.
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公开(公告)号:US12095076B2
公开(公告)日:2024-09-17
申请号:US17311818
申请日:2019-12-04
Inventor: Yosuke Sato , Yohei Uchiyama , Taisuke Asano
CPC classification number: H01M4/362 , H01M4/38 , H01M4/5825 , H01M2004/027
Abstract: A negative electrode active material for a secondary battery includes a silicate composite particle. The silicate composite particle contains silicate phases, silicon particles dispersed in the silicate phases, and a carbon phase. The silicate phases contain at least one selected from the group consisting of an alkali metal and an alkaline earth metal. At least parts of the carbon phase coat at least parts of surfaces of the silicon particles.
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公开(公告)号:US20230307612A1
公开(公告)日:2023-09-28
申请号:US18023102
申请日:2021-05-24
Inventor: Yosuke Sato , Yusuke Saito , Naoki Seki
CPC classification number: H01M4/366 , H01M4/386 , H01M4/5825 , H01M4/134 , C01B33/32 , H01M2004/027
Abstract: A negative electrode material for a non-aqueous electrolyte secondary battery includes composite particles, and a conductive layer disposed on a surface of each of the composite particles. The composite particles each have a silicate phase, and silicon phases dispersed in the silicate phase. The conductive layer contains a calcium component.
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公开(公告)号:US20240396171A1
公开(公告)日:2024-11-28
申请号:US18693756
申请日:2022-08-19
Inventor: Takuya Iwamoto , Yosuke Sato
IPC: H01M50/457 , H01M4/38 , H01M4/587 , H01M4/66 , H01M10/052 , H01M10/0587 , H01M50/42 , H01M50/451 , H01M50/491
Abstract: The lithium-ion secondary battery comprises a positive electrode, a negative electrode, a separator, and an electrolyte. The negative electrode has a negative electrode current collector, and a negative electrode mixture layer formed on a surface of the negative electrode current collector. The negative electrode mixture layer includes a carbon-based material and a silicon-based material as a negative electrode active material. The discharge capacity of the negative electrode active material is 400-750 mAh/g. The thickness of the negative electrode current collector is 4-12 μm, and the 1% offset yield strength of the negative electrode current collector is 300-700 MPa. The separator has a base material layer, a filler layer formed on a surface of the base material layer, and a resin layer formed on a surface of the base material layer or the filler layer. The porosity of the resin layer is 30-80%.
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公开(公告)号:US12113216B2
公开(公告)日:2024-10-08
申请号:US17270519
申请日:2019-08-23
Inventor: Yohei Uchiyama , Taisuke Asano , Yosuke Sato
CPC classification number: H01M4/5825 , H01M4/382 , H01M4/386 , H01M2004/027
Abstract: A negative electrode active material for a secondary battery includes silicate composite particles each of which contain a silicate phase and silicon particles dispersed in the silicate phase, the silicate phase is an oxide phase containing Si, O, and alkali metals, and the alkali metals include at least Na and K.
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公开(公告)号:US20230035333A1
公开(公告)日:2023-02-02
申请号:US17788424
申请日:2020-10-15
Inventor: Yohei Uchiyama , Yosuke Sato , Taisuke Asano , Keita Okazaki
Abstract: A negative electrode active material tor a secondary battery includes a silicate composite particle including crystalline silicon particles, an amorphous phase comprising an Li element, an O element, and an Si element, and a silicon oxide phase, wherein the silicon oxide phase and the silicon particles are dispersed in the amorphous phase.
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公开(公告)号:US20210242453A1
公开(公告)日:2021-08-05
申请号:US17269057
申请日:2019-08-23
Inventor: Yohei Uchiyama , Taisuke Asano , Yosuke Sato
IPC: H01M4/36 , H01M4/38 , H01M4/485 , H01M10/0525 , H01M10/054
Abstract: A negative electrode active material for a secondary battery includes silicate composite particles each of which contain a silicate phase and silicon particles dispersed in the silicate phase, the silicate phase is an oxide phase containing Si, O, and alkali metals, and the alkali metals include at least K and Li.
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公开(公告)号:US20250105259A1
公开(公告)日:2025-03-27
申请号:US18730895
申请日:2023-01-17
Inventor: Takuya Jin , Yusuke Saito , Yosuke Sato , Taisuke Asano
Abstract: A negative electrode active material for nonaqueous electrolyte secondary batteries according to the present invention is characterized by containing composite particles that contain SiC and at least one of Si and an Si alloy, and is also characterized in that the composite particles have a crystallite diameter of 2.0 mm to 5.0 nm as calculated from the half width of the diffraction peak of the (111) plane of SiC in an XRD pattern obtained by an X-ray diffraction method.
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