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公开(公告)号：US11367901B2
公开(公告)日：2022-06-21
申请号：US16375903
申请日：2019-04-05
Inventor： Junichi Sakamoto , Akira Kano
IPC: H01M10/00 , H01M10/0568 , H01M10/052 , H01M10/0567 , H01M10/0569
Abstract: A lithium secondary battery according to the present disclosure comprises a cathode, an anode; and a non-aqueous electrolyte having lithium ion conductivity. A lithium metal is precipitated on a surface of the anode during charge of the lithium secondary battery. The lithium metal is dissolved from the surface of the anode in the non-aqueous electrolyte during discharge of the lithium secondary battery. The non-aqueous electrolyte contains a solvent and a lithium salt. The lithium salt includes a first lithium salt and a second lithium salt. The second lithium salt is different from the first lithium salt. The first lithium salt is composed of a lithium ion and an ate complex anion. A sum of concentration of the first lithium salt and the second lithium salt which are contained in the non-aqueous electrolyte is not less than 3.0 mol/L.
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公开(公告)号：US11362322B2
公开(公告)日：2022-06-14
申请号：US16410522
申请日：2019-05-13
Inventor： Hirotetsu Suzuki , Akira Kano
IPC: H01M4/134 , H01M4/38 , H01M4/62 , H01M10/0525 , H01M10/0567 , H01M10/0568 , H01M4/02
Abstract: Provided is a lithium secondary battery comprising a cathode, an anode, and a non-aqueous electrolyte having lithium ion conductivity. A lithium metal is precipitated on a surface of the anode during charge of the lithium secondary battery. The lithium metal is dissolved from the surface of the anode in the non-aqueous electrolyte during discharge of the lithium secondary battery. The non-aqueous electrolyte contains a solvent and a lithium salt. The solvent includes a fluorinated ether. The fluorinated ether has a fluorination ratio of more than 0% and not more than 60%.
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23.发明授权公开(公告)号：US10978692B2
公开(公告)日：2021-04-13
申请号：US16386758
申请日：2019-04-17
Inventor： Akira Kano , Ryohei Miyamae , Kiyohiro Isii , Kensuke Nakura
Abstract: A lithium secondary battery includes an electrode group and a nonaqueous electrolyte having lithium ion conductivity. A negative electrode includes a negative electrode current collector. The negative electrode current collector has a first surface facing an outward direction of winding of the electrode group and a second surface facing an inward direction of the winding of the electrode group. Lithium metal is deposited on the first surface and the second surface by charge. The negative electrode further includes first protrusions protruding from the first surface and second protrusions protruding from the second surface. A ratio A1X/A1 is less than a ratio A2X/A2. A1X is a sum of projected areas of the first protrusions on the first surface. A1 is an area of the first surface. A2X is a sum of projected areas of the second protrusions on the second surface. A2 is an area of the second surface.
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公开(公告)号：US10811685B2
公开(公告)日：2020-10-20
申请号：US15814571
申请日：2017-11-16
Inventor： Akira Kano , Kazuko Asano , Tsuyoshi Ichinose
IPC: H01M4/58 , H01M10/052 , H01M10/0525 , H01M4/02
Abstract: A negative electrode active material contains a lithium-containing transition metal oxynitride having a crystal structure belonging to the space group Fm3m. An electrochemical device includes a negative electrode which contains a negative electrode active material containing a lithium-containing transition metal oxynitride having a crystal structure belonging to the space group Fm3m; a positive electrode; and an electrolyte.
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公开(公告)号：US10777805B2
公开(公告)日：2020-09-15
申请号：US15869047
申请日：2018-01-12
Inventor： Go Tei , Ryohei Miyamae , Akira Kano
IPC: H01M4/133 , H01M4/38 , H01M10/052 , H01M4/02 , H01M10/0525
Abstract: A negative electrode active material contains a graphite material represented by a formula CaxByC1-y, where x and y satisfy 0
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Patent Agency Ranking
公开(公告)号：US10700380B2
公开(公告)日：2020-06-30
申请号：US16004439
申请日：2018-06-11
Inventor： Akira Kano , Hirotetsu Suzuki , Junichi Sakamoto , Kensuke Nakura
IPC: H01M10/0567 , H01M10/0568 , H01M10/052 , H01M4/131 , H01M4/134 , H01M4/38 , H01M4/66 , H01M10/0525 , H01M10/0569 , H01M4/02
Abstract: A lithium secondary battery includes a positive electrode, a negative electrode on which a lithium metal is deposited in a charged state, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte containing a nonaqueous solvent and a lithium salt containing a carborane anion.
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27.发明授权公开(公告)号：US10559846B2
公开(公告)日：2020-02-11
申请号：US15959294
申请日：2018-04-23
Inventor： Takayuki Nakatsutsumi , Akira Kano , Junko Matsushita , Nobuhiko Hojo
IPC: H01M10/0525 , H01M4/133 , H01M2/20 , H01M4/583 , H01M4/134 , H01M4/66 , H01M4/38 , C01B32/21 , H01M4/587 , H01M4/36 , H01M4/62 , C01B32/205 , H01M4/02
Abstract: A negative-electrode active material comprises a graphite including at least boron and fluorine. The fluorine is disposed at least on a surface of the graphite. A ratio R satisfies 0.5≤R≤1, where R=SBB/SB, and SB denotes a total peak area of a boron 1s spectrum of the graphite obtained by X-ray photoelectron spectroscopy, and SBB denotes a peak area of all spectra each having a peak in a binding energy range of not less than 184.0 eV and not more than 188.5 eV in the boron 1s spectrum.
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公开(公告)号：US09905843B2
公开(公告)日：2018-02-27
申请号：US15285065
申请日：2016-10-04
Inventor： Akira Kano , Yukihiro Umetani , Shuji Ito , Nobuhiko Hojo
IPC: H01M4/133 , H01M4/587 , H01M4/62 , H01M10/0525 , H01M10/052
CPC classification number: H01M4/133 , H01M4/587 , H01M4/62 , H01M10/052 , H01M10/0525
Abstract: A negative electrode material includes a carbon material including boron. In a B1s spectrum of the carbon material which is measured by X-ray photoelectron spectroscopy, the ratio of the area of a peak that occurs at a binding energy of 187.0 eV or more and 188.5 eV or less to the total area of peaks that occur at a binding energy of 184.0 eV or more and 196.5 eV or less is 50% or more.
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29.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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公开(公告)号：US20240421283A1
公开(公告)日：2024-12-19
申请号：US18704635
申请日：2022-10-28
Inventor： Yohei Uchiyama , Akira Kano
IPC: H01M4/134 , H01M4/02 , H01M10/0525 , H01M10/0587
Abstract: A lithium secondary battery including a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and a nonaqueous electrolyte having lithium-ion conductivity. At the negative electrode, lithium metal deposits during charging, and the lithium metal dissolves during discharging. The negative electrode includes a resin film, and a lithium metal layer laminated with the resin film.
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