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    Nonaqueous electrolyte solution secondary battery
    12.
    发明授权
    Nonaqueous electrolyte solution secondary battery 有权

    公开(公告)号：US09780411B2

    公开(公告)日：2017-10-03

    申请号：US14771749

    申请日：2014-02-28

    Applicant: NEC Corporation

    Inventor： Daisuke Kawasaki ,  Ikiko Shimanuki ,  Noboru Yoshida

    IPC: H01M4/36 ,  H01M10/0567 ,  H01M10/0569 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0525

    CPC classification number: H01M10/0569 ,  H01M4/364 ,  H01M4/505 ,  H01M4/525 ,  H01M10/052 ,  H01M10/0525 ,  H01M10/0567 ,  H01M2300/0034 ,  Y02T10/7011

    Abstract: A nonaqueous electrolyte solution secondary battery having an electrode element having a positive electrode and a negative electrode disposed so as to face each other, a nonaqueous electrolyte solution, and an outer package housing the electrode element and the nonaqueous electrolyte solution, wherein the nonaqueous electrolyte solution contains a cyclic sulfonic acid ester represented by the general formula (1), and a positive electrode active material in the positive electrode is a mixture of a lithium manganese composite oxide having a spinel structure and a lithium transition metal composite compound having a layered rock salt structure. wherein, in the formula (1), R1 and R2 are each independently a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a halogen group or an amino group with the proviso that R1 and R2 are not hydrogen atoms at the same time; R3 represents a linkage group selected from the group consisting of an alkylene group having 1 to 5 carbon atoms, a carbonyl group, a sulfonyl group, a fluoroalkylene group having 1 to 6 carbon atoms, and a divalent group having 2 to 6 carbon atoms in which alkylene units or fluoroalkylene units are bonded through an ether group.

    SECONDARY BATTERY
    14.
    发明申请
    SECONDARY BATTERY 有权
    二次电池

    公开(公告)号：US20150093631A1

    公开(公告)日：2015-04-02

    申请号：US14382445

    申请日：2013-02-04

    Applicant: NEC CORPORATION

    Inventor： Daisuke Kawasaki ,  Kazuaki Matsumoto

    IPC: H01M10/0569 ,  H01M4/62 ,  H01M4/48 ,  H01M4/38 ,  H01M2/02 ,  H01M4/58

    CPC classification number: H01M10/0569 ,  H01M2/02 ,  H01M2/0257 ,  H01M2/0285 ,  H01M4/13 ,  H01M4/386 ,  H01M4/483 ,  H01M4/58 ,  H01M4/587 ,  H01M4/62 ,  H01M4/622 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0585 ,  H01M2300/0034 ,  H01M2300/0037 ,  Y02T10/7011

    Abstract: The present invention relates to a secondary battery, comprising an electrode element comprising a positive electrode and a negative electrode placed opposite to each other, an electrolyte, and an outer package housing the electrode element and the electrolyte; wherein the negative electrode is formed by binding a negative electrode active material, which comprises a metal (a) capable of being alloyed with lithium, a metal oxide (b) capable of intercalating/deintercalating lithium ions, and a carbon material (c) capable of intercalating/deintercalating lithium ions, to a negative electrode current collector with a negative electrode binder; and the electrolyte comprises a lithium salt dissolved in a solvent comprising 65 vol % or more of a phosphate ester compound, and more than 0 vol % and less than 20 vol % of a fluorinated carbonate compound.

    Abstract translation: 二次电池技术领域本发明涉及一种二次电池，其包括电极元件，其包括彼此相对放置的正极和负极，电解质和容纳电极元件和电解质的外包装; 其中，所述负极通过将含有能够与锂合金化的金属（a）的负极活性物质，能够嵌入/脱嵌锂离子的金属氧化物（b）和能够嵌入/脱嵌锂离子的碳材料（c） 将锂离子嵌入/脱嵌入负极集电体中，使用负极粘合剂; 并且所述电解质包含溶解在包含65体积％以上磷酸酯化合物的溶剂中的锂盐，以及大于0体积％且小于20体积％的氟化碳酸酯化合物。

    Lithium ion secondary battery
    18.
    发明授权
    Lithium ion secondary battery 有权

    公开(公告)号：US10756337B2

    公开(公告)日：2020-08-25

    申请号：US15779660

    申请日：2016-11-29

    Applicant: NEC Corporation

    Inventor： Ikiko Shimanuki ,  Suguru Tamai ,  Daisuke Kawasaki ,  Hitoshi Ishikawa

    IPC: H01M4/36 ,  H01M4/38 ,  H01M4/48 ,  H01M10/0525 ,  H01M10/0567 ,  H01M10/0569 ,  H01M10/058 ,  H01M4/62 ,  H01M4/02

    Abstract: When the particle size of a silicon material used for a negative electrode active material are small, a large surface area thereof easily causes a side reaction between the active material and an electrolyte solvent to occur, and the cycle characteristics of a lithium ion secondary battery decrease. In order to improve the cycle characteristics, a lithium ion secondary battery according to the present invention is characterized in comprising a negative electrode comprising a material comprising silicon as a constituent element and a polyacrylic acid, and an electrolyte solution comprising a fluoroethylene carbonate, wherein the 50% particle size of the material comprising silicon as a constituent element is 2 μm or less.

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