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11.发明公开公开(公告)号：US20240058675A1
公开(公告)日：2024-02-22
申请号：US18380679
申请日：2023-10-17
Inventor： Yoshinori Aoki , Takeshi Ogasawara
IPC: A63B69/00
CPC classification number: A63B69/0026 , A63B2102/26
Abstract: The positive electrode active material for a non-aqueous electrolyte secondary cell according to an embodiment of the present disclosure is characterized in having a Ni-containing lithium transition metal oxide having a layered structure; the proportion of Ni in the lithium transition metal oxide being 91 to 96 mol % relative to the total number of moles of metal elements excluding Li; a transition metal being present in the Li layer of the layered structure at an amount of 1 to 2.5 mol % relative to the total number of moles of transition metals in the Ni-containing lithium transition metal oxide; and the Ni-containing lithium transition metal oxide being such that the half width n of the diffraction peak for the (208) plane in an X-ray diffraction pattern obtained by X-ray diffraction is 0.30°≤n≤0.50°.
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公开(公告)号：US20240055595A1
公开(公告)日：2024-02-15
申请号：US18267578
申请日：2021-12-06
Inventor： Yoshinori Aoki , Takeshi Ogasawara , Naoya Fujitani
CPC classification number: H01M4/525 , H01M4/505 , H01M2004/028
Abstract: The positive electrode contains a lithium-transition metal composite oxide. With respect to the lithium-transition metal composite oxide, the content of Ni is from 80% by mole to 95% by mole relative to the total number of moles of metal elements excluding Li, and the content of Mo is less than 3% by mole relative to the total number of moles of metal elements excluding Li. The negative electrode comprises a negative electrode mixture layer that contains a negative electrode active material, and a coating film that is formed on the surface of the negative electrode mixture layer, while containing Mo. The content of Mo in the negative electrode is from 0.5 ppm to 120 ppm relative to the total mass of the lithium-transition metal composite oxide in the positive electrode.
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13.发明公开公开(公告)号：US20230216024A1
公开(公告)日：2023-07-06
申请号：US17927473
申请日：2021-04-20
Inventor： Katsuya Inoue , Takeshi Ogasawara , Yoshinori Aoki , Youichirou Uka
CPC classification number: H01M4/364 , H01M4/525 , H01M4/505 , H01M10/05 , H01M2004/028
Abstract: Provided is a positive electrode for a non-aqueous electrolyte secondary battery, the positive electrode comprising: a positive electrode current collector; and a positive electrode mixture layer formed on the surface of the positive electrode current collector. The positive electrode mixture layer contains at least carbon fibers and a positive electrode active material containing a lithium-transition metal composite oxide, wherein the lithium-transition metal composite oxide has a layered rock salt structure, is substantially free of Co, and contains at least Ni, Al, and Sr.
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公开(公告)号：US20220069300A1
公开(公告)日：2022-03-03
申请号：US17422648
申请日：2020-01-16
Inventor： Takaya Tochio , Yoshinori Aoki , Akihiro Kawakita , Yuji Goshima , Takeshi Ogasawara
IPC: H01M4/525 , H01M4/505 , H01M10/0525
Abstract: Positive electrode active material contains: a lithium transition metal oxide that has a layered structure and contains Ni, Nb and a metal element other than Nb having a valence of at least four, also Co as an optional element; and external additive particles that contain at least one element selected from among W, B and Al and are adhered to the particle surface of the lithium transition metal oxide. The percentage of Ni, Nb and Co with respect to the total quantity of metal elements excluding Li in the lithium transition metal oxide satisfy the following ranges: 90 mol. %≤Ni
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公开(公告)号：US20210075013A1
公开(公告)日：2021-03-11
申请号：US17040153
申请日：2019-02-20
Inventor： Motoharu Saitou , Takeshi Ogasawara , Yoshinori Aoki , Tomoki Tsuji
Abstract: A non-aqueous electrolyte secondary battery according to one embodiment includes a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode has lithium composite oxide particles containing 80 mol % or more but less than 100 mol % of Ni with respect to the total number of moles of metal elements excluding Li. The lithium composite oxide particles include particles (32) having a stair-like structure in which three or more layers of a flat surface (30) having a periphery length of 1 μm or more are layered.
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Patent Agency Ranking
公开(公告)号：US20250015284A1
公开(公告)日：2025-01-09
申请号：US18890164
申请日：2024-09-19
Inventor： Yoshinori Aoki , Toshinobu Kanai , Takeshi Ogasawara
Abstract: A positive electrode active material for non-aqueous electrolyte secondary batteries comprises a lithium transition metal oxide containing Ni, Mn, Co, and Al and having a layered structure, wherein the content ratio of Ni in the lithium transition metal oxide is 75 to 95 mol %, the content ratio of Mn in the lithium transition metal oxide is equal to or greater than the content ratio of Co in the lithium transition metal oxide, the content ratio of Co in the lithium transition metal oxide is 0.5 to 2 mol %, the content ratio of a metal element other than Li in an Li layer in the layered structure is 1 to 2.5 mol %, and, in the lithium transition metal oxide, the half width n of a diffraction peak for (208) plane of an X-ray diffraction pattern as measured by X-ray diffraction is as follows: 0.30°≤n≤0.50°.
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公开(公告)号：US12142763B2
公开(公告)日：2024-11-12
申请号：US18380679
申请日：2023-10-17
Inventor： Yoshinori Aoki , Takeshi Ogasawara
IPC: H01M4/525 , A63B69/00 , A63B102/26 , H01M4/02
Abstract: The positive electrode active material for a non-aqueous electrolyte secondary cell according to an embodiment of the present disclosure is characterized in having a Ni-containing lithium transition metal oxide having a layered structure; the proportion of Ni in the lithium transition metal oxide being 91 to 96 mol % relative to the total number of moles of metal elements excluding Li; a transition metal being present in the Li layer of the layered structure at an amount of 1 to 2.5 mol % relative to the total number of moles of transition metals in the Ni-containing lithium transition metal oxide; and the Ni-containing lithium transition metal oxide being such that the half width n of the diffraction peak for the (208) plane in an X-ray diffraction pattern obtained by X-ray diffraction is 0.30°≤n≤0.50°.
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18.发明公开公开(公告)号：US20230187653A1
公开(公告)日：2023-06-15
申请号：US17926760
申请日：2021-04-20
Inventor： Katsuya Inoue , Takeshi Ogasawara , Yoshinori Aoki , Youichirou Uka
IPC: H01M4/66 , H01M10/0525 , H01M4/525 , H01M4/505
CPC classification number: H01M4/666 , H01M10/0525 , H01M4/525 , H01M4/505 , H01M2004/028
Abstract: A positive electrode for nonaqueous electrolyte secondary batteries according to the present invention is provided with a positive electrode collector and a positive electrode mixture layer that is formed on the surface of the positive electrode collector. The positive electrode mixture layer contains at least carbon fibers and a positive electrode active material that contains a lithium transition metal composite oxide; and the lithium transition metal composite oxide has a layered rock salt structure, while containing at least Ni, Al and Ca, but not substantially containing Co.
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公开(公告)号：US20220416229A1
公开(公告)日：2022-12-29
申请号：US17775076
申请日：2020-09-17
Inventor： Rie Matsuoka , Takeshi Ogasawara , Katsuya Inoue , Yoshinori Aoki
Abstract: This positive electrode active material used in a non-aqueous electrolyte secondary battery includes a lithium transition metal composite oxide containing Al and Ni in an amount of at least 80 mol % with respect to the total number of moles of metal elements excluding Li, wherein a primary particle of the lithium transition metal composite oxide has a surface modification layer containing at least Ca on the surface thereof.
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公开(公告)号：US20220407062A1
公开(公告)日：2022-12-22
申请号：US17777475
申请日：2020-09-17
Inventor： Masakazu Togo , Yoshinori Aoki , Takeshi Ogasawara
IPC: H01M4/525
Abstract: In this non-aqueous electrolyte secondary battery: a positive electrode active material contains a lithium transition metal oxide that has a layered structure including a Li layer and that contains at least prescribed amounts of Ni, Ca, and Al; the proportion of metal elements, excluding Li, in the Li layer is 0.6-2.0 mol % with respect to the total number of moles of metal elements, excluding Li, contained in the lithium transition total oxide; a negative electrode active material has a coating containing Ca on the surface thereof; and the contained amount of Ca in the coating is not less than 15 mass ppm but less than 80 mass ppm with respect to the total mass of the positive electrode material.
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