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公开(公告)号：US20220140333A1
公开(公告)日：2022-05-05
申请号：US17429868
申请日：2019-09-27
Inventor： Taisei INOUE , Daisuke NISHIKAWA , Katsuya INOUE
Abstract: Provided is a “lithium-excess-type” active material having high initial efficiency. Disclosed is a positive active material for a nonaqueous electrolyte secondary battery containing a lithium transition metal composite oxide. In this positive active material, the lithium transition metal composite oxide has an α-NaFeO2 structure, a molar ratio Li/Me of Li to a transition metal (Me) is 1
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公开(公告)号：US20220140334A1
公开(公告)日：2022-05-05
申请号：US17429964
申请日：2019-09-27
Inventor： Taisei INOUE , Daisuke NISHIKAWA , Katsuya INOUE
IPC: H01M4/525 , H01M4/1391 , H01M10/052 , H01M10/0568 , H01M10/0569
Abstract: Provided is a “lithium-excess-type” active material in which a decrease in potential associated with a charge-discharge cycle is suppressed. Disclosed is a positive active material for a nonaqueous electrolyte secondary battery containing a lithium transition metal composite oxide. In this positive active material, the lithium transition metal composite oxide has an α-NaFeO2 structure, a molar ratio Li/Me of Li to a transition metal (Me) is 1.25≤Li/Me≤1.45, Ni and Mn are contained as the transition metal (Me), an X-ray diffraction pattern attributable to a space group R3-m is included, and a half-value width for a diffraction peak of a (104) plane at a Miller index hkl in X-ray diffraction measurement using a CuKα ray is 0.27° or less.
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公开(公告)号：US20200225292A1
公开(公告)日：2020-07-16
申请号：US16630957
申请日：2018-06-29
Applicant: GS Yuasa International Ltd.
Inventor： Nan UKUMORI , Katsuya INOUE , Yuichi IKEDA , Ryota KIDO
IPC: G01R31/3828 , H01M10/48 , G01R31/392
Abstract: An energy storage device has a single electrode containing an active material in which repeated charge-discharge changes a first characteristic that is an energy storage amount-potential charge characteristic, and a second characteristic that is an energy storage amount-potential discharge characteristic. An estimation device includes: a storage unit that stores first characteristics, second characteristics, or pieces of V-dQ/dV of the single electrode in accordance with a change in a feature value, which is changed by repeated charge-discharge, or stores as a function of the feature value; an acquisition unit that acquires the feature value of the energy storage device; and a first estimation unit that refers to the first characteristic, the second characteristic, or the V-dQ/dV, or refers to the function on the basis of the feature value acquired by the acquisition unit, to estimate the first characteristic, the second characteristic, or the V-dQ/dV of the single electrode.
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公开(公告)号：US20200182938A1
公开(公告)日：2020-06-11
申请号：US16631614
申请日：2018-07-19
Applicant: GS Yuasa International Ltd.
Inventor： Nan UKUMORI , Katsuya INOUE
IPC: G01R31/367 , G01R31/382 , H01M10/48
Abstract: An estimation device include: an acquisition unit that acquires information relating to a part of a third characteristic that is an energy storage amount-voltage charge characteristic and/or a fourth characteristic that is an energy storage amount-voltage discharge characteristic, of an energy storage device; a storage unit that stores a plurality of energy storage amount characteristics that are at least any of first characteristics, second characteristics, third characteristics that are energy storage amount-voltage charge characteristics, fourth characteristics that are energy storage amount-voltage discharge characteristics, and pieces of V−dQ/dV in correspondence with a change in a feature value, which is changed by repeated charge-discharge, or stores as a function of the feature value; and a first estimation unit that estimates an internal state of the energy storage device on the basis of the information and the energy storage amount characteristics.
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