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11.发明申请公开(公告)号：US20200020932A1
公开(公告)日：2020-01-16
申请号：US16497609
申请日：2018-02-16
Inventor： Taisuke Asano , Yohei Uchiyama , Taisuke Yamamoto , Tatsuya Akira , Norihisa Yamamoto , Hiroshi Minami
IPC: H01M4/36 , H01M4/58 , H01M4/38 , H01M4/48 , H01M10/0525
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：US20230343942A1
公开(公告)日：2023-10-26
申请号：US18028011
申请日：2021-09-14
Inventor： Norihisa Yamamoto , Masahiro Soga
CPC classification number: H01M4/386 , H01M4/625 , H01M4/622 , H01M4/134 , H01M2004/027
Abstract: This negative electrode for a secondary battery is provided with a negative electrode mixture layer comprising an Si compound-containing negative electrode active material, a conductive material and a binding material; the conductive material includes single-layer carbon nanotubes with a outermost diameter of at most 5 nm, and the binding material contains carboxymethyl cellulose salt with a weight average molecular weight of 150,000-450,000.
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13.发明公开公开(公告)号：US20230216042A1
公开(公告)日：2023-07-06
申请号：US17912714
申请日：2021-03-25
Inventor： Shunsuke Nambuya , Norihisa Yamamoto , Masahiro Soga
CPC classification number: H01M4/485 , H01M4/625 , H01M4/131 , H01M2004/027
Abstract: This negative electrode for nonaqueous electrolyte secondary batteries is provided with a negative electrode mixture layer that contains a negative electrode active material and carbon nanotubes. The negative electrode active material contains a first negative electrode active material and a second negative electrode active material; the first negative electrode active material and the second negative electrode active material contain lithium silicate phases, each of which contains lithium, silicon and oxygen, and silicon particles that are dispersed in the lithium silicate phases; the molar ratios of oxygen to silicon (O/Si) in the lithium silicate phases are different from each other; the carbon nanotubes have a diameter of from 1 nm to 5 nm; and the ratio of the mass of the first negative electrode active material relative to the total mass of the first negative electrode active material and the second negative electrode active material is 60% or less.
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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：US20240405219A1
公开(公告)日：2024-12-05
申请号：US18694115
申请日：2022-09-21
Inventor： Norihisa Yamamoto , Masahiro Soga , Naomichi Sato
Abstract: An electrode for secondary batteries according to one embodiment of the present invention is provided with a core body and a mixture layer that is formed on the core body. The mixture layer comprises a first mixture layer and a second mixture layer that is arranged on the first mixture layer. The tortuosity (τ2) of the second mixture layer is lower than the tortuosity (τ1) of the first mixture layer. The ratio (τ2/τ1) of the tortuosity (τ2) to the tortuosity (τ1) satisfies, for example, 0.3≤(τ2/τ1)
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Patent Agency Ranking
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：US20230361307A1
公开(公告)日：2023-11-09
申请号：US18028700
申请日：2021-09-15
Inventor： Norihisa Yamamoto , Masahiro Soga , Takashi Watanabe
CPC classification number: H01M4/625 , H01M4/386 , H01M4/622 , H01M4/134 , H01M2004/021
Abstract: A secondary battery negative electrode according to the present invention is provided with a negative electrode mixture layer comprising: a negative electrode active material that contains an Si compound; and a binding material that includes cellulose nanofibers having a fiber diameter of 9 nm or less and a conductive material containing single-walled carbon nanotubes having a fiber diameter of less than 4 nm. The content of the cellulose nanofibers is greater than or equal to 0.005 mass % and less than 0.2 mass % in relation to the mass of the negative electrode active material.
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18.发明公开公开(公告)号：US20230317950A1
公开(公告)日：2023-10-05
申请号：US18011254
申请日：2021-06-24
Inventor： Norihisa Yamamoto , Nobuhiko Hojo , Masahiro Soga
IPC: H01M10/0568 , H01M4/134 , H01M10/052 , H01M4/38 , H01M4/62
CPC classification number: H01M4/622 , H01M4/134 , H01M4/386 , H01M4/625 , H01M10/052 , H01M10/0568 , H01M2004/027
Abstract: A negative electrode for a non-aqueous electrolyte secondary battery includes a negative electrode mixture including a negative electrode active material capable of electrochemically absorbing and releasing lithium ions, carbon nanotubes, and a binder. The negative electrode active material includes a silicon-containing material, and the binder includes an acrylic polymer. The polymer includes a hydrophilic structural unit having a carboxyl group, and a hydrophobic structural unit.
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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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公开(公告)号：US11196040B2
公开(公告)日：2021-12-07
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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