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公开(公告)号：US20210359304A1
公开(公告)日：2021-11-18
申请号：US17390797
申请日：2021-07-30
Inventor： Hiroki HAYASHI , Nao MATSUMURA , Yasuyuki ITO , Susumu NOMOTO , Makoto AKUTSU , Tougo ENDOU
IPC: H01M4/583 , H01G11/86 , H01M4/1399 , H01G11/06 , H01G11/48 , H01M4/36 , H01M4/60 , H01G11/24 , H01M50/44 , H01M50/531 , H01M50/429 , H01M4/04 , H01M4/137 , H01M4/1393 , H01M4/66 , H01M10/0525
Abstract: A positive electrode active material for an electrochemical device has a fiber shape or a grain-aggregate shape. The positive electrode active material includes an inner core part having a fiber shape or a grain-aggregate shape, and a superficial part covering at least part of the inner core part. The inner core part contains a first conductive polymer, and the superficial part contains a second conductive polymer that is different from the first conductive polymer.
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公开(公告)号：US20220285104A1
公开(公告)日：2022-09-08
申请号：US17553035
申请日：2021-12-16
Inventor： Susumu NOMOTO , Yasuyuki ITO , Nao MATSUMURA , Hiroki HAYASHI , Makoto AKUTSU , Tougo ENDOU
IPC: H01G11/50 , H01G11/06 , H01G11/48 , H01G11/86 , H01M4/1399 , H01M4/137 , H01M4/60 , H01M10/0566 , H01M10/052 , H01M10/0525 , H01M10/0569 , H01M10/058
Abstract: An electrochemical device includes a positive electrode having a positive electrode material layer containing a conductive polymer doped with a first anion and a second anion, a negative electrode having a negative electrode material layer storing and releasing lithium ions, and a nonaqueous electrolytic solution having lithium ionic conductivity. The second anion is more easily dedoped from the conductive polymer than the first anion. At an end period of charge of the electrochemical device, a number of moles M1 of the first anion and a number of moles M2 of the second anion respectively doped in the conductive polymer satisfy a relationship of M1 M4.
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公开(公告)号：US20210376325A1
公开(公告)日：2021-12-02
申请号：US17400910
申请日：2021-08-12
Inventor： Kiyohiro ISII , Takuma ASARI , Chiho NOBUMORI , Yasuyuki ITO , Nao MATSUMURA
IPC: H01M4/60 , H01G11/06 , H01G11/48 , H01G11/50 , H01M4/137 , H01M4/1399 , H01G11/86 , H01M10/0566 , H01M10/058 , H01M10/052 , H01G11/82 , H01G11/58 , H01G11/66 , H01M10/0525 , H01M10/0568 , H01M10/0585
Abstract: A method for manufacturing an electrochemical device includes the following steps: a step of preparing a positive electrode, the positive electrode including a first current collector and a positive electrode layer containing a conductive polymer; a step of preparing a negative electrode, the negative electrode including a second current collector and a negative electrode layer; and a step of sealing the positive electrode, the negative electrode, and an electrolytic solution in an exterior body. The step of preparing the positive electrode includes a step of holding the positive electrode in depressurized atmosphere and then introducing gas containing CO2 as a primary component into the depressurized atmosphere.
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公开(公告)号：US20230268487A1
公开(公告)日：2023-08-24
申请号：US17913393
申请日：2021-03-25
Inventor： Yusuke NAKAMURA , Shohei MASUDA , Yasuyuki ITO
CPC classification number: H01M4/366 , H01M4/0402 , H01M4/485 , H01M4/587 , H01M2004/027
Abstract: A negative electrode for an electrochemical device includes a negative electrode core material and a negative electrode material layer supported on the negative electrode core material. The negative electrode material layer contains a carbon material. A surface layer portion of the negative electrode material layer includes a first layer containing lithium carbonate and a second layer containing a solid electrolyte. At least a portion of the second layer covers at least a portion of the surface of the carbon material with the first layer interposed therebetween.
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