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公开(公告)号：US20250132327A1
公开(公告)日：2025-04-24
申请号：US18836491
申请日：2023-02-07
Inventor： Yoshinori Satou , Yuta Nishimori , Maho Harada , Takahito Nakayama
Abstract: A positive electrode material for a secondary battery includes a secondary particle that is an aggregate of a plurality of primary particles. The primary particles contain a first metal oxide as a positive electrode active material. The primary particles include first primary particles disposed at a surface of the secondary particle, second primary particles disposed inside the secondary particle in contact with the first primary particles, and third primary particles disposed inside the secondary particle not in contact with the first primary particles. The positive electrode material further includes a second metal oxide attached at least to surfaces of the first primary particles and the second primary particles and having a composition different from the first metal oxide. The second metal oxide is not attached to surfaces of the third primary particles, or an amount attached thereto is smaller than an amount attached to the second primary particles.
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公开(公告)号：US20240097111A1
公开(公告)日：2024-03-21
申请号：US18274575
申请日：2021-11-25
Inventor： Shuhei Uchida , Yoshinori Satou
CPC classification number: H01M4/366 , H01G11/50 , H01M4/364 , H01M4/386 , H01M4/483 , H01M4/5825 , H01M4/587 , H01M10/0525 , H01M2004/021
Abstract: Active material particles include: composite particles each containing a lithium silicate phase, and a silicon phase dispersed in the lithium silicate phase; and a first coating covering at least part of surfaces of the composite particles. The first coating contains an oxide of a first element with oxygen vacancies, and a carbon material, and the first element is an element other than non-metallic elements.
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Patent Agency Ranking
公开(公告)号：US20230112969A1
公开(公告)日：2023-04-13
申请号：US17796077
申请日：2020-12-17
Inventor： Yoshinori Satou , Shuhei Uchida , Yuichi Miyoshi , Nobuhiko Hojo
Abstract: An electrochemical element includes a current collector, and an active material layer supported on the current collector, wherein the active material layer includes active material particles, the active material particles each include lithium silicate composite particles each including a lithium silicate phase and silicon particles dispersed in the lithium silicate phase, and a first coating that covers at least a portion of a surface of the lithium silicate composite particles, the first coating includes an oxide of a first element other than a non-metal element, the active material layer has a thickness TA, and T1b > T1t is satisfied, where T1b is a thickness of the first coating that covers the lithium silicate composite particles at a position of 0.25TA from the surface of the current collector in the active material layer, and T1t is a thickness of the first coating that covers the lithium silicate composite particles at a position of 0.75TA from the surface of the current collector in the active material layer.
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公开(公告)号：US20250149654A1
公开(公告)日：2025-05-08
申请号：US18836867
申请日：2023-02-07
Inventor： Yuta Nishimori , Yoshinori Satou , Takashi Sasaki , Maho Harada , Takahito Nakayama
Abstract: A secondary battery includes a positive electrode, a negative electrode, a separator interposed between the positive electrode and the negative electrode, and a lithium-ion conductive electrolyte. The positive electrode includes a positive electrode current collector, and a positive electrode active material layer. The positive electrode active material layer contains a first metal oxide including a lithium-containing transition metal oxide that is a positive electrode active material, and a different second metal oxide. A metal element M contained in the second metal oxide includes an atom m1 and an atom m2 that are the same element having different valences from each other. The metal element M is at least one metal element selected from the group consisting of Al, Ti, Si, Zr, Mg, Nb, Ta, Sn, Ni, V, and Cr. An oxide of the atom m1 and the atom m2 are different in temperature dependence of electrical resistance.
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公开(公告)号：US20230083069A1
公开(公告)日：2023-03-16
申请号：US17796073
申请日：2020-12-17
Inventor： Yoshinori Satou , Shuhei Uchida
Abstract: An electrochemical element includes a current collector, and an active material layer supported on the current collector, wherein the active material layer contains lithium silicate composite particles each including a. lithium silicate phase, and silicon particles dispersed in the lithium silicate phase, and an electrically conductive carbon material, a first coating covers at least a portion of a surface of the lithium silicate composite particles and at least a portion of a surface of the electrically conductive carbon material, the first coating includes an oxide of a first element other than a non-metal element, and T1A>T1c is satisfied, where T1A is an average thickness of the first coating that covers at least a portion of the surface of the lithium silicate composite particles, and T1c is an average thickness of the first coating that covers at least a portion of the surface of the electrically conductive carbon material.
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公开(公告)号：US20240088372A1
公开(公告)日：2024-03-14
申请号：US18274337
申请日：2021-11-25
Inventor： Shuhei Uchida , Yoshinori Satou
IPC: H01M4/485 , H01M4/36 , H01M4/525 , H01M10/0525
CPC classification number: H01M4/485 , H01M4/362 , H01M4/525 , H01M10/0525
Abstract: Active material particles include composite particles each containing a lithium silicate phase, and a silicon phase dispersed in the lithium silicate phase, and a first coating covering at least part of surfaces of the composite particles. The first coating contains an oxide of a first element with low crystallinity, and a carbon material, the oxide and the carbon material being mixed together. The first element is an element other than non-metallic elements.
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公开(公告)号：US20230083365A1
公开(公告)日：2023-03-16
申请号：US17796173
申请日：2020-12-17
Inventor： Shuhei Uchida , Yoshinori Satou
Abstract: An electrochemical element includes a current collector, and an active material layer on the current collector, wherein the active material layer includes active material particles each having a lithium silicate composite particle including a lithium silicate phase and silicon particles dispersed therein, and a first coating that covers at least a portion of a surface of the lithium silicate composite particle, the first coating includes an oxide of a first element other than a non-metal element, and the active material layer has a thickness TA, and T1b
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