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公开(公告)号：US20240006718A1
公开(公告)日：2024-01-04
申请号：US18039428
申请日：2021-11-17
Inventor： Shuhei Uchida
IPC: H01M50/449 , H01M4/62 , H01M50/411 , H01M50/489 , H01M10/052
CPC classification number: H01M50/449 , H01M4/62 , H01M50/411 , H01M50/489 , H01M10/052
Abstract: A secondary battery includes a first electrode, a second electrode, and a separator interposed between the first electrode and the second electrode. One of the first electrode and the second electrode is a positive electrode, and the other is a negative. The first electrode includes a first electrode active material layer, and the first electrode active material layer includes a first electrode active material, and a first fire retardant including a halogen atom. The separator includes a second fire retardant.
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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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公开(公告)号：US20230369592A1
公开(公告)日：2023-11-16
申请号：US18029243
申请日：2021-09-28
Inventor： Satoshi Shibutani , Takahito Nakayama , Shuhei Uchida
IPC: H01M4/587 , H01M10/0525 , H01M4/38 , H01M4/36 , H01M4/58 , H01M4/485 , H01M50/143
CPC classification number: H01M4/587 , H01M4/366 , H01M4/382 , H01M4/485 , H01M4/5825 , H01M10/0525 , H01M50/143 , H01M2004/027
Abstract: The disclosed secondary battery includes a positive electrode and a negative electrode, wherein the negative electrode includes a first layer including at least a negative electrode active material layer, and the first layer further includes a fire retardant including a halogen atom.
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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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7.发明申请公开(公告)号：US20230046167A1
公开(公告)日：2023-02-16
申请号：US17788092
申请日：2020-10-15
Inventor： Satoshi Shibutani , Takahito Nakayama , Shuhei Uchida
IPC: H01M50/446 , H01M4/62
Abstract: This separator for a nonaqueous electrolyte secondary battery comprises a porous substrate, a heat-resistant layer that is formed on the porous substrate, and clusters of filler particles that are present in dot shapes on the surface of the heat-resistant layer. The filler particles are particles of a compound including at least one of phosphorus, silicon, boron, nitrogen, potassium, sodium, and bromine, and the transformation point at which the filler particles transform from a solid phase to a liquid phase or thermally decompose is in the range 180° C.-1000° C. This separator electrode for a nonaqueous electrolyte secondary battery can suppress heat production of the battery during a nail puncture test, while also suppressing an increase in battery resistance.
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公开(公告)号：US20230042333A1
公开(公告)日：2023-02-09
申请号：US17788104
申请日：2020-10-15
Inventor： Shuhei Uchida
IPC: H01M4/13
Abstract: This electrode for nonaqueous electrolyte secondary batteries is provided with a collector, an active material layer that is formed on the collector, and an assembly of filler particles, said assembly being present on the surface of the active material layer. The filler particles contain at least one of boron oxide, potassium pyrosulfate and a compound containing an alkali metal or Br, while having a transformation point, at which the filler particles undergo a transformation from a solid phase to a liquid phase or a thermal decomposition, within the range of from 180° C. to 650° C. The compound containing an alkali metal or Br contains at least one of a borate, a silicate, a carbonate, a hydrogen carbonate, a citrate or an aromatic compound.
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公开(公告)号：US11228033B2
公开(公告)日：2022-01-18
申请号：US16503442
申请日：2019-07-03
Inventor： Kensuke Nakura , Ryuichi Natsui , Shuhei Uchida , Takuji Tsujita
IPC: H01M4/505 , H01M4/131 , H01M4/36 , H01M4/525 , H01M10/0525 , H01M4/02 , C01G25/02 , C01G23/04 , H01M4/62 , B82Y30/00
Abstract: Provided is a cathode active material comprising a lithium composite oxide and a covering material which covers a surface of the lithium composite oxide. The lithium composite oxide is a multi-phase mixture including a first phase having a crystal structure which belongs to a monoclinic crystal; a second phase having a crystal structure which belongs to a hexagonal crystal; and a third phase having a crystal structure which belongs to a cubical crystal. The lithium composite oxide has an integral intensity ratio I(18°-20°)/I(43°-46°) of not less than 0.05 and not more than 0.99, where the integral intensity I(α°-β°) is an integral intensity of a peak which is a maximum peak present within a range of a diffraction angle 2θ of not less than α° and not more than β° in an X-ray diffraction pattern of the lithium composite oxide. The covering material has an electronic conductivity of not more than 106 S/m.
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公开(公告)号：US11183684B2
公开(公告)日：2021-11-23
申请号：US16459614
申请日：2019-07-02
Inventor： Takuji Tsujita , Kensuke Nakura , Shuhei Uchida , Ryuichi Natsui
Abstract: A cathode active material includes a lithium composite oxide and a covering material which covers a surface of the lithium composite oxide. The lithium composite oxide is a multi-phase mixture including a first phase having a crystal structure which belongs to a space group C2/m and a second phase having a crystal structure which belongs to a space group R-3m. The lithium composite oxide has an integral intensity ratio I(18°-20°)/I(43°-46°) of not less than 0.05 and not more than 1.15, where the integral intensity ratio I(18°-20°)/I(43°-46°) is a ratio of an integral intensity I(18°-20°) to an integral intensity I(43°-46°). The integral intensity I(α°-β°) is an integral intensity of a first peak which is a maximum peak present within a range of a diffraction angle 2θ of not less than α° and not more than β° in an X-ray diffraction pattern of the lithium composite oxide.
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