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公开(公告)号：US20230036223A1
公开(公告)日：2023-02-02
申请号：US17788864
申请日：2020-12-16
Applicant: GS YUASA INTERNATIONAL LTD.
Inventor： Shinya OTANI , Takenori TOYAMA , Daisuke ENDO
Abstract: A nonaqueous electrolyte energy storage device according to one aspect of the present invention is a nonaqueous electrolyte energy storage device including a positive electrode having positive active material particles, in which the positive active material particles contain a lithium transition metal composite oxide having an α-NaFeO2 structure, the lithium transition metal composite oxide contains at least one of nickel and cobalt, and manganese, a content of lithium with respect to a transition metal in the lithium transition metal composite oxide exceeds 1.0 in terms of a molar ratio, a diffraction peak is present in a range of 20° or more and 22° or less in an X-ray diffraction diagram of the lithium transition metal composite oxide using a CuKα ray, and the positive active material particles contain aluminum.
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公开(公告)号：US20230163293A1
公开(公告)日：2023-05-25
申请号：US17917177
申请日：2021-03-23
Applicant: GS Yuasa International Ltd.
Inventor： Takenori TOYAMA , Shinya OTANI , Daisuke ENDO
IPC: H01M4/525 , H01M10/052 , H01M4/505
CPC classification number: H01M4/525 , H01M10/052 , H01M4/505 , H01M2004/028
Abstract: A positive active material for a nonaqueous electrolyte energy storage device according to one aspect of the present invention is a positive active material for a nonaqueous electrolyte energy storage device containing a lithium transition metal composite oxide having an α-NaFeO2 structure, the positive active material further containing aluminum, in which the lithium transition metal composite oxide contains at least one of nickel and cobalt, and manganese, a content of manganese in a transition metal. in the lithium transition metal composite oxide is 0.6 or less in terms of molar ratio, and in a charged state at a potential of 4.35 V vs. Li/Li+ in a state where there is no charge history in which the potential reaches 4.5 V vs. Li/Li+ or more, an oxygen positional parameter of the positive active material determined from crystal structure analysis by a Rietveld method when a space group R3-m is used. for a crystal structure model based on an X-ray diffraction pattern is 0.265 or more and 0.269 or less.
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公开(公告)号：US20220293932A1
公开(公告)日：2022-09-15
申请号：US17636268
申请日：2020-07-03
Applicant: GS Yuasa International Ltd.
Inventor： Daisuke YOSHIKAWA , Shinya OTANI
Abstract: Provided is a positive active material for a nonaqueous electrolyte secondary battery which contains a lithium transition metal composite oxide, the lithium transition metal composite oxide having an α-NaFeO2 structure, containing Ni, Co and Mn as a transition metal (Me), and having an X-ray diffraction pattern attributable to a space group R3-m, in which a ratio of the full width at half maximum of a diffraction peak of the (003) plane to the full width at half maximum of a diffraction peak of the (104) plane, (003)/(104) at a Miller index hkl in X-ray diffraction measurement using a CuKα ray is 0.810 to 0.865, and a crystallite size is 410 Å or more.
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公开(公告)号：US20210257665A1
公开(公告)日：2021-08-19
申请号：US17252765
申请日：2019-06-19
Applicant: GS Yuasa International Ltd.
Inventor： Hiromasa MURAMATSU , Shinya OTANI , Ryo HARADA , Akira KISHIMOTO
IPC: H01M10/0568 , H01M10/0525 , H01M10/0569 , H01M4/525 , H01M4/505 , H01M10/44
Abstract: A nonaqueous electrolyte secondary battery including a positive electrode, a negative electrode, and a nonaqueous electrolyte, in which the positive electrode includes, as an active material, a lithium-transition metal composite oxide that has an α-NaFeO2-type crystal structure, and is represented by the general formula Li1+αMe1−αO2 (0
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