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公开(公告)号：US20250015338A1
公开(公告)日：2025-01-09
申请号：US18711307
申请日：2022-10-14
Inventor： Yuji Tani , Yosuke Sato
Abstract: A negative electrode of this lithium ion secondary battery comprises a negative electrode collector and a negative electrode mixture layer that is formed on the surface of the negative electrode collector; the thickness of the negative electrode collector is 4 μm to 12 μm; the 1% proof stress of the negative electrode collector is 300 MPa to 700 MPa; the negative electrode mixture laver contains a carbon-based material and a silicon-based material, which serve as negative electrode active materials; the discharge capacity of the negative electrode active materials is 400 mAh/g to 750 mAh/g the carbon-based material contains a carbon-based material A and a carbon-based material B, which have different particle fracture strengths from each other; the particle fracture strength of the carbon-based material A is 5 MPa to 15 MPa; and the particle fracture strength of the carbon-based material B is 25 MPa to 40 MPa.
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12.发明申请公开(公告)号：US20240396023A1
公开(公告)日：2024-11-28
申请号：US18695613
申请日：2022-09-08
Inventor： Yusuke Saito , Yosuke Sato , Shin Sato , Keita Okazaki
Abstract: A negative electrode active material for a secondary battery includes composite particles each including a matrix, and a silicon phase dispersed in the matrix. Each of the composite particles is coated with a coating layer. The coating layer is a mixture of a carbon material and a fluorine-containing material.
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公开(公告)号：US12155061B2
公开(公告)日：2024-11-26
申请号：US17269057
申请日：2019-08-23
Inventor： Yohei Uchiyama , Taisuke Asano , Yosuke Sato
IPC: H01M10/0525 , H01M4/36 , H01M4/38 , H01M4/485 , H01M10/054 , H01M4/02
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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14.发明公开公开(公告)号：US20230411618A1
公开(公告)日：2023-12-21
申请号：US18037419
申请日：2021-09-22
Inventor： Yusuke Saito , Yosuke Sato , Naoki Seki
IPC: H01M4/58 , H01M10/0525
CPC classification number: H01M4/5825 , H01M10/0525 , H01M2004/027
Abstract: A negative electrode active material for a non-aqueous electrolyte secondary battery includes composite particles containing a lithium silicate phase, a silicon phase dispersed in the lithium silicate phase, and a crystalline phase of silicon dioxide dispersed in the lithium silicate phase. The crystalline phase of silicon dioxide contains β-cristobalite and quartz.
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公开(公告)号：US20230207791A1
公开(公告)日：2023-06-29
申请号：US17927321
申请日：2021-05-26
Inventor： Yohei Uchiyama , Yosuke Sato
CPC classification number: H01M4/386 , H01M4/134 , C01B33/32 , H01M2004/027
Abstract: A negative electrode active material for a secondary battery includes a lithium silicate phase; and a silicon phase dispersed in the lithium silicate phase. The lithium silicate phase contains at least one element M selected from the group consisting of alkali metals (except lithium), Group II elements, rare-earth elements, zirconium (Zr), niobium (Nb), tantalum (Ta), vanadium (V), titanium (Ti), phosphorus (P), bismuth (Bi), zinc (Zn), tin (Sn), lead (Pb), antimony (Sb), cobalt (Co), fluorine (F), tungsten (W), aluminum (Al), and boron (B). An electron diffraction image of the negative electrode active material obtained using a transmission electron microscope has a spot image.
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Patent Agency Ranking
公开(公告)号：US20230132836A1
公开(公告)日：2023-05-04
申请号：US17914518
申请日：2021-03-22
Inventor： Yosuke Sato , Yusuke Saito , Naoki Seki
Abstract: A secondary battery including a positive electrode, a negative electrode, and an electrolyte. The negative electrode includes a carbon material, a first silicon-containing material, and a second silicon-containing material. The first silicon-containing material includes a silicate phase, and first silicon phases dispersed in the silicate phase. The second silicon-containing material includes a carbon phase, and second silicon phases dispersed in the carbon phase.
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公开(公告)号：US20220029151A1
公开(公告)日：2022-01-27
申请号：US17311818
申请日：2019-12-04
Inventor： Yosuke Sato , Yohei Uchiyama , Taisuke Asano
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：US20250006896A1
公开(公告)日：2025-01-02
申请号：US18695962
申请日：2022-08-18
Inventor： Tasuku Ishiguro , Nanami Takeda , Yosuke Sato
Abstract: Disclosed is a non-aqueous electrolyte secondary battery including: a negative electrode that contains a negative electrode material mixture; a separator, a positive electrode that is provided to oppose the negative electrode via the separator, and a non-aqueous electrolyte. The negative electrode material mixture contains a negative electrode active material. The negative electrode active material contains 3 mass % or more of a silicon-containing material. The silicon-containing material contains carbon composite particles. The carbon composite particles have a carbon phase and a silicon phase dispersed in the carbon phase. The non-aqueous electrolyte contains a 5- or 6-membered cyclic compound component that contains a sulfur element as a ring-constituting element.
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公开(公告)号：US20240413327A1
公开(公告)日：2024-12-12
申请号：US18690536
申请日：2022-09-14
Inventor： Taisuke Asano , Toshiki Kamidaira , Yosuke Sato
IPC: H01M4/58 , H01M4/02 , H01M10/0525
Abstract: The disclosed negative electrode active material for a secondary battery includes silicate composite particles each including a silicate phase, and silicon particles dispersed in the silicate phase. A peak of an oxygen K-edge energy loss near edge structure (ELNES) at an interface between the silicate phase and the silicon particles is shifted to a lower energy side by 2.0 eV to 3.0 eV relative to a peak of the oxygen K-edge energy loss near edge structure in the silicate phase.
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20.发明公开公开(公告)号：US20240055583A1
公开(公告)日：2024-02-15
申请号：US18267249
申请日：2021-12-24
Inventor： Kaoru Inoue , Yosuke Sato , Kensuke Nakura , Akihiro Taniguchi
CPC classification number: H01M4/366 , H01M4/587 , H01M4/5825 , H01M4/133 , H01M4/131 , H01M2004/027
Abstract: A negative electrode for a nonaqueous electrolyte secondary battery, according to one embodiment of the present invention, is provided with a negative electrode core and a negative electrode mixture layer provided on the surface of the negative electrode core. The negative electrode mixture layer has a first layer that includes: at least one of at least one kind of metal element selected from Si, Sn, Sb, Mg, and Ge, and a compound containing said metal element; at least one of multi-walled carbon nanotubes and single-walled carbon nanotubes; and a binding agent. The negative electrode mixture layer also has a second layer that includes graphite A with a particle fracture strength of 10-35 MPa. The porosity of the first layer is preferably 50-65%.
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