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    LITHIUM ION SECONDARY BATTERY
    1.
    发明申请
    LITHIUM ION SECONDARY BATTERY 审中-公开

    公开(公告)号：US20200091559A1

    公开(公告)日：2020-03-19

    申请号：US16617629

    申请日：2018-05-23

    Applicant: NEC Corporation

    Inventor： Takehiro NOGUCHI ,  Takuya HASEGAWA ,  Ikiko SHIMANUKI ,  Daisuke KAWASAKI

    IPC: H01M10/0569 ,  H01M4/38 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/0568 ,  H01M10/0585

    Abstract: A lithium ion secondary battery having high energy density and being excellent in cycle characteristics is provided. The present invention relates to a lithium ion secondary battery comprising: a negative electrode active material comprising a material comprising silicon as a constituent element; and an electrolyte solution comprising: a non-aqueous solvent comprising a fluorinated ether compound, an open-chain sulfone compound, and a cyclic carbonate compound, and a supporting salt comprising LiPF6, lithium bis(fluorosulfonyl)imide, and lithium bis(oxalato)borate (LiBOB); wherein the content of LiBOB in the electrolyte solution is 0.2 mass % or more.

    LITHIUM ION SECONDARY BATTERY
    3.
    发明申请
    LITHIUM ION SECONDARY BATTERY 审中-公开

    公开(公告)号：US20190393554A1

    公开(公告)日：2019-12-26

    申请号：US16465428

    申请日：2017-11-30

    Applicant: NEC Corporation

    Inventor： Takehiro NOGUCHI ,  Takuya HASEGAWA ,  Daisuke KAWASAKI ,  lkiko SHIMANUKI

    IPC: H01M10/0569 ,  H01M10/0525 ,  H01M4/134 ,  H01M4/58

    Abstract: A purpose of one embodiment of the present invention is to provide a lithium ion secondary battery that has improved life-span characteristics. The first lithium ion secondary battery of the present invention comprises an electrolyte solution comprising a sulfone compound, a fluorinated ether compound and LiN(FSO2)2, and a negative electrode comprising a silicon material, wherein a content of LiN(FSO2)2 in the electrolyte solution is more than 5 weight % and 20 weight % or less.

    SECONDARY BATTERY ELECTROLYTE AND SECONDARY BATTERY
    10.
    发明申请
    SECONDARY BATTERY ELECTROLYTE AND SECONDARY BATTERY 审中-公开
    二次电池电解质和二次电池

    公开(公告)号：US20160099486A1

    公开(公告)日：2016-04-07

    申请号：US14889718

    申请日：2014-05-09

    Applicant: NEC Corporation

    Inventor： Takehiro NOGUCHI ,  Yuukou KATOU ,  Hideaki SASAKI ,  Makiko TAKAHASHI ,  Emiko FUJII

    IPC: H01M10/0569 ,  H01M10/04 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525

    CPC classification number: H01M10/0569 ,  H01M4/485 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/049 ,  H01M10/052 ,  H01M10/0567 ,  H01M10/058 ,  H01M2300/0034

    Abstract: The present invention relates to a secondary battery electrolyte, which contains a first fluorine-containing ether compound, a second fluorine-containing ether compound, and at least one selected from fluorine-containing phosphate ester compounds and sulfone compounds, wherein the fluorine substitution rate of the first fluorine-containing ether compound is lower than that of the second fluorine-containing ether compound, and the content of the first fluorine-containing ether compound is higher than that of the second fluorine-containing ether compound. According to the present invention, with respect to batteries operating at a high voltage, and batteries supposed to be used at a high temperature for a long period, there can be provided a lithium secondary battery suppressed in the decomposition reaction of the electrolyte and improved in the life characteristics.

    Abstract translation: 本发明涉及含有第一含氟醚化合物，第二含氟醚化合物和选自含氟磷酸酯化合物和砜化合物中的至少一种的二次电池电解质，其中氟取代率 第一含氟醚化合物的含量低于第二含氟醚化合物，第一含氟醚化合物的含量比第二含氟醚化合物的含量高。 根据本发明，对于高电压工作的电池和长时间在高温下使用的电池，可以提供抑制电解质的分解反应的锂二次电池， 生活特点。

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