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21.发明授权公开(公告)号：US11557760B2
公开(公告)日：2023-01-17
申请号：US16597813
申请日：2019-10-09
Inventor： Ryuichi Natsui , Kensuke Nakura , Junko Matsushita , Issei Ikeuchi
Abstract: A positive-electrode active material contains a lithium composite oxide containing at least one selected from the group consisting of F, Cl, N, and S. The crystal structure of the lithium composite oxide belongs to a space group C2/m. An XRD pattern of the lithium composite oxide comprises a first peak within the first range of 44 degrees to 46 degrees of a diffraction angle 2θ and a second peak within the second range of 18 degrees to 20 degrees of the diffraction angle 2θ. The ratio of the second integrated intensity of the second peak to the first integrated intensity of the first peak is within a range of 0.05 to 0.90.
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22.发明授权公开(公告)号：US11545657B2
公开(公告)日：2023-01-03
申请号：US16820643
申请日：2020-03-16
Inventor： Takanori Omae , Ryuichi Natsui , Yu Otsuka , Shuhei Uchida
IPC: H01M4/131 , H01M4/505 , H01M10/0562 , H01M10/052 , H01M4/525 , H01M4/36
Abstract: A cathode active material includes a lithium composite oxide having a crystal structure which belongs to a layered structure. The lithium composite oxide has a BET specific surface area of not less than 5 m2/g and not more than 10 m2/g. The lithium composite oxide has an average particle size of not less than 3 μm and not more than 30 μm. The lithium composite oxide, an average crystallite size calculated by an X-ray diffraction method is not less than 150 Å and not more than 350 Å.
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公开(公告)号：US20220407061A1
公开(公告)日：2022-12-22
申请号：US17773435
申请日：2020-10-13
Inventor： Ryuichi Natsui , Mitsuhiro Hibino
Abstract: This positive electrode active material is for a secondary battery and contains a lithium transition metal complex oxide. The lithium transition metal complex oxide is represented by general formula LixMnyNizSbaObFc (x+y+z+a≤b+c=2, 1≤x≤1.2, 0.4≤y≤0.8, 0≤z≤0.4, 0
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24.发明授权公开(公告)号：US10886529B2
公开(公告)日：2021-01-05
申请号：US16214208
申请日：2018-12-10
Inventor： Takayuki Ishikawa , Ryuichi Natsui , Issei Ikeuchi , Kensuke Nakura
IPC: H01M4/00 , H01M4/36 , H01M4/505 , H01M4/525 , H01M4/48 , H01M10/0525 , C01G45/12 , H01M4/62 , C01G53/00 , C01G51/00 , H01M4/02
Abstract: A positive electrode active material includes a lithium composite oxide and a covering material that covers a surface of the lithium composite oxide. The covering material has an electron conductivity of 106 S/m or less. The lithium composite oxide is a multiphase mixture including a first phase having a first crystal structure that belongs to a space group Fm-3m and a second phase having a second crystal structure that belongs to a space group other than a space group Fm-3m. The ratio I(18°-20°)/I(43°-46°) of a first integrated intensity I(18°-20°) of a first maximum peak present at a first diffraction angle 2θ of 18° or more and 20° or less to a second integrated intensity I(43°-46°) of a second maximum peak present at a second diffraction angle 2θ of 43° or more and 46° or less in an XRD pattern of the lithium composite oxide satisfies 0.05≤I(18°-20°)/I(43°-46°)≤0.90.
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公开(公告)号：US10833322B2
公开(公告)日：2020-11-10
申请号：US15844626
申请日：2017-12-18
Inventor： Ryuichi Natsui , Kensuke Nakura
IPC: H01M4/36 , H01M10/0562 , H01M10/0525 , H01M4/131 , H01M4/62 , H01M4/505 , H01M4/02 , H01M4/525 , H01M4/1315
Abstract: A positive electrode active material contains a lithium composite oxide and a lithium composite oxyfluoride. The lithium composite oxyfluoride covers at least part of the surface of the lithium composite oxide. The lithium composite oxyfluoride is represented by a composition formula LiαMe2βOγFδ, where Me2 represents at least one selected from the group consisting of Mn, Co, Ni, Fe, Al, Cu, V, Nb, Mo, Ti, Cr, Zr, Zn, Na, K, Ca, Mg, Pt, Au, Ru, and W; and 1.0≤α≤2.1; 0.8≤β≤1.3; 1.5≤γ≤2.9; and 0.1≤δ≤1.5. The crystal structure of the lithium composite oxyfluoride belongs to space group Fm-3m.
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Patent Agency Ranking
公开(公告)号：US10651462B2
公开(公告)日：2020-05-12
申请号：US16039305
申请日：2018-07-18
Inventor： Takayuki Ishikawa , Ryuichi Natsui , Kensuke Nakura
IPC: H01M4/00 , H01M4/36 , H01M4/505 , H01M4/58 , H01M4/525 , H01M4/485 , C01G45/12 , C01G51/00 , H01M4/62 , C01G53/00 , H01M4/02 , H01M10/0525
Abstract: A positive electrode active material contains a lithium composite oxide and a covering material. The lithium composite oxide contains at least one element selected from the group consisting of fluorine, chlorine, nitrogen, and sulfur. The lithium composite oxide has a crystal structure that belongs to space group C2/m. The ratio I(003)/I(104) of a first integrated intensity I(003) of a first peak corresponding to a (003) plane to a second integrated intensity I(104) of a second peak corresponding to a (104) plane in an XRD pattern of the lithium composite oxide satisfies 0.05≤I(003)/I(104)≤0.90. The covering material has an electron conductivity of 106 S/m or less.
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27.发明授权公开(公告)号：US09786949B2
公开(公告)日：2017-10-10
申请号：US14651158
申请日：2013-11-21
Inventor： Nobuhiko Hojo , Ryuichi Natsui , Akira Kano , Masahisa Fujimoto
CPC classification number: H01M10/054 , C01G45/1228 , C01G49/0027 , C01G49/0072 , C01G53/42 , C01P2002/72 , C01P2002/76 , C01P2006/40 , H01M4/131 , H01M4/505 , H01M4/525 , H01M2004/028 , Y02P20/133
Abstract: An object of the present invention or a problem to be solved by the present invention is to provide, as a material for use as a positive electrode of a sodium secondary battery, a novel material that allows the resulting battery to have capacity characteristics superior to those of conventional batteries. The composite metal oxide of the present invention has a composition represented by the general formula NaxMeyO2, where Me is at least one selected from the group consisting of Fe, Mn, and Ni, x satisfies 0.8
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28.发明公开公开(公告)号：US20240021813A1
公开(公告)日：2024-01-18
申请号：US18267359
申请日：2021-12-23
Inventor： Shogo Esaki , Ryuichi Natsui , Junko Matsushita , Mitsuhiro Hibino , Kensuke Nakura
IPC: H01M4/525 , H01M4/505 , H01M4/58 , H01M10/0569 , H01M10/0568 , H01M10/0525
CPC classification number: H01M4/525 , H01M4/505 , H01M4/582 , H01M10/0569 , H01M10/0568 , H01M10/0525 , H01M2004/027
Abstract: A positive electrode active material for nonaqueous electrolyte secondary batteries according to one embodiment of the present invention contains a lithium transition metal composite oxide which is represented by composition formula LixMnyNizTiaMbO2-cFc (wherein M represents at least one element that is selected from among P, Co, Si, Sr, Nb, W, Mo, Ca, Mg, Sb, Na, B, V, Cr, Fe, Cu, Zn, Ge, Zr, Ru, K, Bi and Al; 1.0
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29.发明公开公开(公告)号：US20230402594A1
公开(公告)日：2023-12-14
申请号：US18028364
申请日：2021-09-14
Inventor： Ryuichi Natsui , Junko Matsushita , Mitsuhiro Hibino , Kensuke Nakura
IPC: H01M4/505 , H01M4/1315 , H01M4/525 , C01G53/00
CPC classification number: H01M4/505 , H01M4/1315 , H01M2004/028 , C01G53/50 , H01M4/525
Abstract: This positive electrode active material for nonaqueous electrolyte secondary batteries contains a lithium transition metal composite oxide that is represented by composition formula LixMnyNizPaMbO2-cFc(wherein M represents at least one element that is selected from among Ti, Co, Si, Sr, Nb, W, Mo, Ca, Mg, Sb, Na, B, V, Cr, Fe, Cu, Zn, Ge, Zr, Ru, K and Bi; 1.0
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公开(公告)号：US11637287B2
公开(公告)日：2023-04-25
申请号：US16930430
申请日：2020-07-16
Inventor： Yuta Sugimoto , Ryuichi Natsui , Izuru Sasaki , Akinobu Miyazaki
IPC: H01M4/62 , H01M4/525 , H01M10/0525 , H01M10/0562 , H01M4/1315 , H01M10/052 , H01M4/02
Abstract: Provided is a positive electrode material which further improves charge/discharge efficiency. The positive electrode material according to the present disclosure includes a positive electrode active material and a first solid electrolyte material. The first solid electrolyte material includes Li, M, and X, and does not include sulfur. M is at least one selected from the group consisting of metalloid elements and metal elements other than Li. X is at least one selected from the group consisting of Cl, Br, and I. The positive electrode active material includes a metal oxyfluoride.
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