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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：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：US20250167220A1
公开(公告)日：2025-05-22
申请号：US18838386
申请日：2023-02-10
Inventor： Takuya Jin , Taisuke Asano
Abstract: A negative electrode active material for a non-aqueous electrolyte secondary battery according to one example of an embodiment comprises composite particles (30) that include a lithium aluminate phase (31) and a silicon phase (32) dispersed in the lithium aluminate phase (31). The lithium aluminate phase (31) contains boron, and the ratio (MAI/MB) of the aluminum percentage content (MAI) and the boron percentage content (NIB) with respect to the total amount of the elements other than oxygen constituting the lithium aluminate phase (31) and the silicon phase (32) is 1.0-30.0, inclusive.
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Patent Agency Ranking
公开(公告)号：US20250158023A1
公开(公告)日：2025-05-15
申请号：US18839621
申请日：2023-02-08
Inventor： Takuya Jin , Taisuke Asano
Abstract: A negative electrode active material for a non-aqueous electrolyte secondary battery according to one example of an embodiment comprises composite particles (30) that include a lithium aluminate phase (31) and a silicon phase (32) dispersed in the lithium aluminate phase (31). The composite particles (30) have an internal porosity of 25% or less before being charged and discharged for the first time.
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公开(公告)号：US20210320299A1
公开(公告)日：2021-10-14
申请号：US17270519
申请日：2019-08-23
Inventor： Yohei Uchiyama , Taisuke Asano , Yosuke Sato
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：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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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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公开(公告)号：US11271197B2
公开(公告)日：2022-03-08
申请号：US16497609
申请日：2018-02-16
Inventor： Taisuke Asano , Yohei Uchiyama , Taisuke Yamamoto , Tatsuya Akira , Norihisa Yamamoto , Hiroshi Minami
Abstract: Disclosed is a negative electrode material for a non-aqueous electrolyte secondary battery, including: a lithium silicate phase; silicon particles dispersed in the lithium silicate phase; and at least one element Me dispersed in the lithium silicate phase, and selected from the group consisting of a rare-earth element and an alkaline-earth metal. The composition of the lithium silicate phase is represented, for example, by the formula: Li2zSiO2+z, and satisfies 0
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