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公开(公告)号：US20240006651A1
公开(公告)日：2024-01-04
申请号：US18037883
申请日：2021-11-30
Inventor： Noriko Fukamichi , Tomohiro Harada , Takeshi Ogasawara , Daizo Jito
IPC: H01M10/052 , H01M4/525 , H01M4/583 , H01M50/431 , H01M50/42 , H01M50/451
CPC classification number: H01M10/052 , H01M4/525 , H01M4/583 , H01M50/431 , H01M50/42 , H01M50/451 , H01M2300/0037 , H01M10/0567
Abstract: This non-aqueous electrolyte secondary battery, which is one example of an embodiment, comprises: a positive electrode that has a positive electrode mixture layer; a negative electrode; a separator that is interposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte. The positive electrode mixture layer contains a first lithium-and-transition-metal composite oxide represented by general formula LixNi1−y−zCoyMzO2 (in the formula, 0.8≤x≤1.2, 0≤y≤0.2, 0
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2.发明公开公开(公告)号：US20230395785A1
公开(公告)日：2023-12-07
申请号：US18266957
申请日：2021-12-15
Inventor： Daizo Jito , Tomohiro Harada , Noriko Fukamichi , Takeshi Ogasawara
IPC: H01M4/36 , H01M4/525 , H01M10/052
CPC classification number: H01M4/364 , H01M4/525 , H01M10/052 , H01M2004/028
Abstract: A positive electrode active material for a non-aqueous electrolyte secondary battery according to one exemplary embodiment comprises: a first lithium transition metal composite oxide represented by general formula LiaNibM11-bO2 (in the formula, 1.5≤a≤2.5, 0.95≤b≤1.00, and M1 is at least one metal element excluding Li and Ni); and a second lithium transition metal composite oxide represented by general formula LicNi2-c-dM2dO2 (in the formula, 0
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3.发明公开公开(公告)号：US20230369561A1
公开(公告)日：2023-11-16
申请号：US18029003
申请日：2021-09-14
Inventor： Tomohiro Harada , Rina Yamamoto
IPC: H01M4/131 , H01M10/052 , H01M4/62 , H01M4/525 , H01M4/02
CPC classification number: H01M4/131 , H01M10/052 , H01M4/625 , H01M4/623 , H01M4/525 , H01M2004/028 , H01M2004/021
Abstract: Disclosed is a positive electrode for a non-aqueous electrolyte secondary battery including: a positive electrode current collector sheet; and a positive electrode material mixture layer supported on the positive electrode current collector sheet. The positive electrode material mixture layer contains a positive electrode active material, a binder, and a conductive agent. The positive electrode active material contains a composite oxide that has a layered rock-salt type crystal structure and contains lithium and an element A other than lithium. The element A contains at least nickel. The atomic ratio Ni/A of nickel relative to the element A is 0.8 or more and 1.0 or less. The binder contains a polymer binder that has a three-dimensioned mesh structure. The mass of the positive electrode material mixture layer supported per m2 of the positive electrode current collector sheet is 280 g or more.
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公开(公告)号：US11616228B2
公开(公告)日：2023-03-28
申请号：US16640223
申请日：2018-10-10
Inventor： Tomohiro Harada , Hiroshi Minami
IPC: H01M4/485 , H01M4/525 , H01M4/131 , H01M4/134 , H01M4/66 , H01M10/0525 , H01M10/0587 , H01M50/107 , H01M4/02
Abstract: The non-aqueous electrolyte secondary cell according to the present invention comprises: an electrode body constituted by a positive electrode including a positive electrode active material comprising a lithium-containing transition metal oxide, a negative electrode including a negative electrode current collector onto which metallic lithium is deposited during charging, and a separator disposed between the positive electrode and the negative electrode; and a non-aqueous electrolyte. The molar ratio of the total lithium content of the positive electrode and the negative electrode to the transition metal content of the positive electrode is 1.1 or less. During discharging, the positive electrode capacitance α(mAh) of the positive electrode and the volume X (mm3) of a hollow constituted by a space formed in the center of the electrode body 14 satisfy the relationship 0.5≤X/α≤4.0.
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公开(公告)号：US20230163292A1
公开(公告)日：2023-05-25
申请号：US17915051
申请日：2021-03-23
Inventor： Youichirou Uka , Koh Masahara , Tomohiro Harada , Rina Yamamoto , Tomohisa Okazaki
Abstract: This positive electrode for secondary batteries is provided with a positive electrode collector and a positive electrode mixture layer that is arranged on the positive electrode collector. The positive electrode mixture layer contains a positive electrode active material that contains a lithium-transition metal composite oxide and carbon fibers each having an outermost peripheral diameter of 20 nm or less; the lithium-transition metal composite oxide contains 80% by mole or more of Ni relative to the total number of moles of metal elements excluding Li; an alkaline earth metal element is present on the particle surfaces of the oxide; and the content of the carbon fibers relative to the total amount of the positive electrode active material is from 0.01% by mass to 1.0% by mass.
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Patent Agency Ranking
公开(公告)号：US11508987B2
公开(公告)日：2022-11-22
申请号：US16640159
申请日：2018-10-10
Inventor： Tomohiro Harada , Hiroshi Minami
IPC: H01M4/485 , H01M10/052 , H01M4/04 , H01M4/38 , H01M4/66 , H01M10/0587 , H01M4/02
Abstract: The nonaqueous electrolyte secondary battery comprises the following: a positive electrode including a positive electrode active material that includes a lithium-containing transition metal oxide, a negative electrode including a negative electrode current collector wherein lithium metal deposits on the negative electrode current collector during charging, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte. The molar ratio of the total amount of lithium held by the positive electrode and the negative electrode to the amount of transition metal in the positive electrode is not more than 1.1. In addition, in the discharged state, a space layer is present between the negative electrode and the separator, and the positive electrode capacity per unit area, α (mAh/cm2), of the positive electrode and the average in thickness, X (μm), of the space layer 50 satisfy 0.05≤α/X≤0.2.
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公开(公告)号：US20210305583A1
公开(公告)日：2021-09-30
申请号：US17261945
申请日：2019-07-05
Inventor： Tomohiro Harada
IPC: H01M4/66 , H01M10/0525 , H01M4/485 , H01M10/0569 , H01M10/0568 , H01M4/62
Abstract: A lithium secondary battery, including: a positive electrode; a negative electrode; a non-aqueous electrolyte having lithium ion conductivity; and a separator interposed between the positive electrode and the negative electrode. The positive electrode includes a positive electrode mixture layer containing a positive electrode active material, and a positive electrode current collector. The positive electrode active material includes a composite oxide containing lithium and a transition metal. A molar ratio: MLi/MTM of a total lithium amount per unit area MLi in the positive electrode and the negative electrode to a transition metal amount per unit area MTM in the positive electrode is 1.1 or less. The negative electrode includes a negative electrode current collector, and a plurality of porous films laminated on the negative electrode current collector and having electrically insulating properties.
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公开(公告)号：US20210280919A1
公开(公告)日：2021-09-09
申请号：US17261355
申请日：2019-02-20
Inventor： Tomohiro Harada
IPC: H01M10/0587 , H01M4/70 , H01M4/485 , H01M10/0525
Abstract: A lithium secondary battery with a positive electrode active material including a composite oxide containing lithium and a transition metal. A molar ratio: MLi/MTM of a total lithium amount per unit area MLi in a positive electrode and a negative electrode to a transition metal amount per unit area MTM in the positive electrode is 1.1 or less. The negative electrode includes a negative electrode current collector larger in area than the positive electrode mixture layer. In the wound electrode group in an unwound state, center lines dividing the positive electrode mixture layer and the negative electrode current collector along their winding direction into two halves are not on the same straight line. The negative electrode lead is connected at its one end to a non-facing region not facing the positive electrode mixture layer of the negative electrode current collector.
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公开(公告)号：US20240178396A1
公开(公告)日：2024-05-30
申请号：US18284205
申请日：2022-03-30
Inventor： Kosuke Kuroda , Youichirou Uka , Koh Masahara , Tomohiro Harada , Rina Yamamoto
IPC: H01M4/62 , C09D5/24 , C09D7/40 , C09D7/45 , C09D7/61 , C09D7/65 , C09D139/06 , H01M4/131 , H01M4/525
CPC classification number: H01M4/622 , C09D5/24 , C09D7/45 , C09D7/61 , C09D7/65 , C09D7/70 , C09D139/06 , H01M4/131 , H01M4/525 , H01M4/625
Abstract: A disclosed conductive material dispersion liquid includes a conductive material including carbon nanotubes, dispersants, and a polar aprotic solvent. The dispersants include a polyvinylpyrrolidone-based compound and a cellulose derivative.
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10.发明公开公开(公告)号：US20240006603A1
公开(公告)日：2024-01-04
申请号：US18037880
申请日：2021-11-30
Inventor： Tomohiro Harada , Noriko Fukamichi , Takeshi Ogasawara , Daizo Jito
IPC: H01M4/525 , H01M10/052 , H01M4/62 , H01M4/36
CPC classification number: H01M4/525 , H01M10/052 , H01M4/625 , H01M4/364 , H01M2004/028
Abstract: The positive electrode mixture layer of this nonaqueous electrolyte secondary battery positive electrode, which is one exemplary embodiment, contains a first lithium-transition-metal composite oxide represented by general formula LixNi1−y−zCoyMzO2 (in the formula. 0.8≤x≤1.2, 0≤y≤0.2, 0
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