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公开(公告)号：US11362321B2
公开(公告)日：2022-06-14
申请号：US16498205
申请日：2018-02-14
Inventor： Tatsuya Akira , Taisuke Yamamoto
Abstract: A negative electrode material includes a graphite material, an alkali metal salt, and at least one metal material selected from the group consisting of Fe, Mn, Mg, Ni, Pd, Rh, Os, and Pt. The graphite material contains natural graphite.
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公开(公告)号：US20210066716A1
公开(公告)日：2021-03-04
申请号：US16963611
申请日：2019-01-21
Inventor： Yohei Uchiyama , Norihisa Yamamoto , Tatsuya Akira
IPC: H01M4/58 , H01M4/131 , H01M4/134 , H01M10/0525
Abstract: This negative electrode active material for a secondary cell which is one aspect of the present disclosure comprises: a silicate phase that contains Li, Si, and Mx (Mx alkali metal, alkaline earth metal, and an element other than Si); silicon particles dispersed in the silicate phase; and oxide particles that contain Zr dispersed in the silicate phase. The content of each element with respect to the total of the elements other than oxygen in the silicate phase is 3 to 45 mol % for Li, 40 to 78 mol % for Si, and 1 to 40 mol % for Mx.
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公开(公告)号：US20200350591A1
公开(公告)日：2020-11-05
申请号：US16767774
申请日：2018-10-26
Inventor： Yohei Uchiyama , Taisuke Yamamoto , Tatsuya Akira , Norihisa Yamamoto , Hiroshi Minami
Abstract: A lithium battery including a negative electrode having a negative electrode active material layer that contains lithium silicate particles and a binder. The lithium silicate particles include composite particles including a lithium silicate phase and silicon particles dispersed in the lithium silicate phase, wherein a carbon material is present inside the composite particles, and an area ratio of the carbon material occupying a cross section of the composite particles is 0.008 to 6%. The binder includes at least a first resin, wherein the first resin is at least cue selected from the group consisting of polyacrylic acid, a polyacrylic acid salt, and their derivatives. The first resin is contained in an amount of 2 mass % or less in the negative electrode active material layer.
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公开(公告)号：US11990606B2
公开(公告)日：2024-05-21
申请号：US16957156
申请日：2018-10-29
Inventor： Yohei Uchiyama , Norihisa Yamamoto , Tatsuya Akira
IPC: H01M4/36 , H01M4/02 , H01M4/38 , H01M4/58 , H01M10/0525
CPC classification number: H01M4/362 , H01M4/38 , H01M4/5825 , H01M10/0525 , H01M2004/027
Abstract: A negative electrode active material for non-aqueous electrolyte secondary batteries, including: lithium silicate composite particles including a lithium silicate phase and silicon particles dispersed in the lithium silicate phase, the lithium silicate phase being an oxide phase including Li, Si, O, and M, where M is an element other than the following elements: Group 1 elements of alkali metals, Group 16 elements of oxygen group, Group 18 elements of rare gas, and Si. An amount of each element relative to a total amount of Li, Si and M in the lithium silicate phase is 3 to 55 mol % for Li, 25 mol % or more for Si, and 3 to 50 mol % for M. A carbon material is present inside the lithium silicate composite particles; and an area ratio of the carbon material occupying a cross section of the composite particles is 0.008 to 6%.
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公开(公告)号：US11715822B2
公开(公告)日：2023-08-01
申请号：US16650236
申请日：2018-09-26
Inventor： Norihisa Yamamoto , Yohei Uchiyama , Tatsuya Akira , Kazuro Hayashida
CPC classification number: H01M4/364 , H01M4/134 , H01M4/136 , H01M4/366 , H01M4/386 , H01M4/5825 , H01M4/625 , H01M10/0525 , H01M2004/027
Abstract: Negative electrode active material particles comprise base particles having: a silicate phase containing Li2O, SiO2, at least one oxide selected from M12O3, M2O2, M32O5, and M4O3 (where M1, M2, M3, and M4 are elements other than alkali metals, alkali earth metals, and Si), and a discretionary component MO (where M is an alkali earth metal); and silicon particles dispersed in the silicate phase. The element contents for the elements contained in the silicate phase are: 3-33 mol % of Li; 40-78 mol % of S; and 1-40 mol % of M1, M2, M3, and M4. If MO is contained, the M content in the silicate phase is 1-10 mol %.
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Patent Agency Ranking
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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公开(公告)号：US20210202930A1
公开(公告)日：2021-07-01
申请号：US16650236
申请日：2018-09-26
Inventor： Norihisa Yamamoto , Yohei Uchiyama , Tatsuya Akira , Kazuro Hayashida
Abstract: Negative electrode active material particles comprise base particles having: a silicate phase containing Li2O, SiO2, at least one oxide selected from M12O3, M2O2, M32O5, and M4O3 (where M1, M2, M3, and M4 are elements other than alkali metals, alkali earth metals, and Si), and a discretionary component MO (where M is an alkali earth metal); and silicon particles dispersed in the silicate phase. The element contents for the elements contained in the silicate phase are: 3-33 mol % of Li; 40-78 mol % of S; and 1-40 mol % of M1, M2, M3, and M4. If MO is contained, the M content in the silicate phase is 1-10 mol %.
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公开(公告)号：US20190319261A1
公开(公告)日：2019-10-17
申请号：US16464817
申请日：2017-11-17
Inventor： Yohei Uchiyama , Taisuke Yamamoto , Tatsuya Akira , Norihisa Yamamoto , Hiroshi Minami
Abstract: Disclosed is a negative electrode material including: a lithium silicate phase that contains a lithium silicate; and silicon particles that are dispersed in the lithium silicate phase, wherein the silicon particles have a crystallite size of 10 nm or more, and the lithium silicate has a composition represented by the following formula: Li2Si2O5.(x−2)SiO2, where 2
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公开(公告)号：US11936034B2
公开(公告)日：2024-03-19
申请号：US16957182
申请日：2018-12-26
Inventor： Yohei Uchiyama , Norihisa Yamamoto , Tatsuya Akira
IPC: H01M4/36 , H01M4/485 , H01M10/0525
CPC classification number: H01M4/364 , H01M4/485 , H01M10/0525
Abstract: A negative electrode active substance particle according to one embodiment of the present invention, comprises a mother particle that has: a silicate phase that includes Na, Si, and at least one element selected from M, M1, M2, M3 and M4 (M is an alkali earth metal, and M1, M2, M3 and M4 are elements other than alkali metals, alkali earth metals or Si); and silicon particles dispersed in the silicate phase. The contents of the elements in the silicate phase are: 9-52 mol % of Na; 3-50 mol % of M, M1, M2, M3 and M4; and at least 25 mol % of Si.
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公开(公告)号：US11670772B2
公开(公告)日：2023-06-06
申请号：US16767791
申请日：2018-10-26
Inventor： Yohei Uchiyama , Norihisa Yamamoto , Tatsuya Akira , Kazuro Hayashida
IPC: H01M4/58 , H01M10/0525 , H01M10/0568 , H01M10/0569 , H01M4/02
CPC classification number: H01M4/5825 , H01M10/0525 , H01M10/0568 , H01M10/0569 , H01M2004/021 , H01M2004/027 , H01M2004/028
Abstract: Negative electrode active material particles according to the present invention have composite particles that include: a sodium silicate phase with a Vickers hardness of 150 Hv or greater, and silicon particles dispersed in the sodium silicate phase.
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