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    LITHIUM SECONDARY BATTERY AND PRODUCTION METHOD THEREFOR
    2.
    发明申请
    LITHIUM SECONDARY BATTERY AND PRODUCTION METHOD THEREFOR 有权
    锂二次电池及其生产方法

    公开(公告)号：US20150236376A1

    公开(公告)日：2015-08-20

    申请号：US14421523

    申请日：2013-07-31

    Applicant: NEC Corporation

    Inventor： Takehiro Noguchi ,  Hideaki Sasaki ,  Makiko Takahashi ,  Yuukou Katou

    IPC: H01M10/0567 ,  H01M10/0525

    CPC classification number: H01M10/0567 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/052 ,  H01M10/0525 ,  H01M2220/30 ,  H01M2300/0025 ,  Y10T29/49108

    Abstract: An embodiment of the present invention relates to a lithium secondary battery comprising a nonaqueous electrolytic solution comprising a phosphate compound represented by the following general formula (1): O═P(O—R1)(O—R2)(O—R3) (1), wherein R1, R2, and R3 are each alkyl group or the like or a group comprising an ether bond represented by —R4—O—R5 (R4 represents alkylene group, and R5 represents alkyl group), and at least one of R1, R2, and R3 is a group comprising an ether bond, and at least one of R1, R2, and R3 contains fluorine, and a positive electrode active material having a charge and discharge region of 4.5 V or more versus lithium.

    Abstract translation: 本发明的一个实施方案涉及一种锂二次电池，其包含非水电解液，其包含由以下通式（1）表示的磷酸盐化合物：O = P（O-R 1）（O-R 2）（O-R 3）（O-R 3） 1），其中R1，R2和R3各自为烷基等，或由-R4-O-R5（R4表示亚烷基，R5表示烷基）表示的醚键的基团，以及至少一种 R1，R2和R3是包含醚键的基团，R1，R2和R3中的至少一个含有氟，并且相对于锂，电荷和放电区域的充电和放电区域为4.5V或更高。

    LITHIUM SECONDARY BATTERY
    6.
    发明申请
    LITHIUM SECONDARY BATTERY 有权
    锂二次电池

    公开(公告)号：US20150171477A1

    公开(公告)日：2015-06-18

    申请号：US14414985

    申请日：2013-07-01

    Applicant: NEC Corporation

    Inventor： Makiko Takahashi ,  Takehiro Noguchi ,  Hideaki Sasaki ,  Yuukou Katou

    IPC: H01M10/0569 ,  H01M4/58 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0567

    CPC classification number: H01M10/0569 ,  H01M4/505 ,  H01M4/525 ,  H01M4/5825 ,  H01M10/052 ,  H01M10/0567 ,  H01M2004/028 ,  H01M2300/0025 ,  H01M2300/0034 ,  H01M2300/0037 ,  H01M2300/004 ,  H01M2300/0042

    Abstract: The present invention relates to a lithium secondary battery, comprising a positive electrode; a negative electrode; and a non-aqueous electrolyte solution, wherein the non-aqueous electrolyte solution contains a phosphate polymer represented by the following formula (1): wherein R1 to R5 each independently represents aliphatic hydrocarbon group or fluorinated aliphatic hydrocarbon group, wherein the group may have a substituent, and n represents an integer of 1 or more, with the proviso that when n is 2 or more, two or more R1(s) may be the same as, or different from each other and two or more R4(s) may be the same as, or different from each other; and a fluorinated phosphate represented by the following formula (2): wherein R6 to R8 each independently represents aliphatic hydrocarbon group or fluorinated aliphatic hydrocarbon group, wherein the group may have a substituent, with the proviso that at least one of R6 to R8 is fluorinated aliphatic hydrocarbon group.

    Abstract translation: 锂二次电池技术领域本发明涉及一种锂二次电池，其包括正极; 负极; 和非水电解质溶液，其中所述非水电解质溶液含有下式（1）表示的磷酸酯聚合物：其中R1至R5各自独立地表示脂族烃基或氟化脂族烃基，其中所述基团可以具有 取代基，n表示1以上的整数，条件是当n为2以上时，两个以上的R 1（s）可以相同也可以不同，可以使两个以上的R 4（s） 彼此相同或不同; 和由下式（2）表示的氟化磷酸酯：其中R6至R8各自独立地表示脂族烃基或氟化脂族烃基，其中基团可以具有取代基，条件是R6至R8中的至少一个为氟化 脂族烃基。

    Lithium ion secondary battery
    7.
    发明授权
    Lithium ion secondary battery 有权

    公开(公告)号：US11329321B2

    公开(公告)日：2022-05-10

    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 ,  H01M4/02

    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
    8.
    发明授权
    Lithium ion secondary battery 有权

    公开(公告)号：US10923770B2

    公开(公告)日：2021-02-16

    申请号：US16465428

    申请日：2017-11-30

    Applicant: NEC Corporation

    Inventor： Takehiro Noguchi ,  Takuya Hasegawa ,  Daisuke Kawasaki ,  Ikiko 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.

    Electrolyte solution for secondary battery and secondary battery
    9.
    发明授权
    Electrolyte solution for secondary battery and secondary battery 有权

    公开(公告)号：US10749215B2

    公开(公告)日：2020-08-18

    申请号：US16082458

    申请日：2017-03-03

    Applicant: NEC Corporation

    Inventor： Takehiro Noguchi ,  Shin Serizawa ,  Takuya Hasegawa

    IPC: H01M10/0569 ,  H01M4/505 ,  H01M4/525 ,  H01M10/0525 ,  H01M10/058 ,  H01M4/02

    Abstract: The purpose of the present invention is to provide a lithium secondary battery which has improved service life characteristics by suppressing a decomposition reaction of the electrolyte solution in the field of batteries that operate at high voltages or are assumed to be used at high temperatures for a long period of time. The present invention relates to an electrolyte solution for a secondary, which is characterized by containing a sulfone compound, a fluorine-containing cyclic acetal compound and a cyclic carbonate in a specific composition; and a secondary battery which uses this electrolyte solution for a secondary battery.

    Secondary battery electrolyte and secondary battery
    10.
    发明授权
    Secondary battery electrolyte and secondary battery 有权

    公开(公告)号：US10263286B2

    公开(公告)日：2019-04-16

    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 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/058 ,  H01M4/58 ,  H01M10/0567 ,  H01M4/485 ,  H01M10/04

    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.

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