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    BINDER FOR POSITIVE ELECTRODES, ELECTRODE MIXTURE, ELECTRODE AND SECONDARY BATTERY
    22.
    发明公开
    BINDER FOR POSITIVE ELECTRODES, ELECTRODE MIXTURE, ELECTRODE AND SECONDARY BATTERY 审中-实审

    公开(公告)号：EP4415079A1

    公开(公告)日：2024-08-14

    申请号：EP23882529.3

    申请日：2023-10-19

    申请人： Daikin Industries, Ltd.

    发明人： OGURA, Akiho ,  YAMAZAKI, Shigeaki ,  ICHINOSE, Yuma ,  TERADA, Junpei ,  FUJIWARA, Kae

    IPC分类号： H01M4/62 ,  C08F214/22 ,  H01M4/131 ,  H01M10/054

    CPC分类号： C08F214/22 ,  H01M4/131 ,  H01M4/505 ,  H01M4/525 ,  H01M4/62 ,  H01M10/054 ,  Y02E60/10

    摘要： Provided are a binder that lowers interfacial resistance between a current collector and an electrode material layer in a positive electrode of a sodium ion battery and has good battery characteristics, as well as an electrode mixture, an electrode, and a secondary battery using the binder. A binder for a positive electrode of a sodium ion battery, including a copolymer that has a vinylidene fluoride unit (A) and a constituent unit (B) derived from at least one monomer selected from the group consisting of trifluoroethylene, hexafluoropropylene, chlorotrifluoroethylene, a monomer represented by formula (1), a monomer represented by formula (2), and a monomer represented by formula (3), and that is free of a tetrafluoroethylene unit:

    wherein Rf1 is a linear or branched fluorinated alkyl group or fluorinated alkoxy group having from 1 to 12 carbon atoms, and the fluorinated alkyl group and the fluorinated alkoxy group optionally contain an oxygen atom (-O-) between carbon-carbon atoms in the case of having 2 or more carbon atoms,

    wherein Rf2 is a linear or branched fluorinated alkyl group or fluorinated alkoxy group having from 1 to 12 carbon atoms, and the fluorinated alkyl group and the fluorinated alkoxy group optionally contain an oxygen atom (-O-) between carbon-carbon atoms in the case of having 2 or more carbon atoms, and

    wherein R1, R2, and R3 are each independently a hydrogen atom, a chlorine atom or an alkyl group having from 1 to 5 carbon atoms; X is a single bond or an atomic group having a main chain composed of from 1 to 20 atoms and having a molecular weight of 500 or less; and Y represents an inorganic cation and/or an organic cation.

    ELECTROLYTE SOLUTION, LITHIUM-SULFUR SECONDARY BATTERY, AND MODULE
    25.
    发明公开
    ELECTROLYTE SOLUTION, LITHIUM-SULFUR SECONDARY BATTERY, AND MODULE 审中-公开

    公开(公告)号：EP3982442A1

    公开(公告)日：2022-04-13

    申请号：EP20818122.2

    申请日：2020-06-05

    申请人： DAIKIN INDUSTRIES, LTD.

    发明人： HIDAKA, Tomoya ,  KUWAJIMA, Yoshiko ,  YAMAZAKI, Shigeaki

    IPC分类号： H01M4/134 ,  H01M4/38 ,  H01M10/052 ,  H01M10/0568 ,  H01M10/0569

    摘要： There are provided an electrolytic solution capable of improving the output characteristics and the capacity retention, a lithium-sulfur secondary battery having the electrolytic solution, as well as a module. The electrolytic solution to be used for a battery having a positive electrode or a negative electrode containing a sulfur-containing electrode active material containing at least one selected from the group consisting of simple sulfur, lithium polysulfides (Li 2 S n : 1 ≤ n ≤ 8) and organosulfur compounds contains: a fluorinated ether represented by the formula (1): Rf-(OR 1 ) n -O-R 2 wherein Rf is an alkyl group having a fluorine atom and optionally forming a branch or a ring having 1 to 5 carbon atoms, R 1 is an alkyl group optionally having a fluorine atom, R 2 is an alkyl group having no fluorine atom, having 1 to 9 carbon atoms and optionally forming a branch or a ring, n is 0, 1 or 2, and the number of carbon atoms in one molecule is 5 or more; an ether compound represented by the formula (2): R 4 -(OCHR 3 CH 2 ) x -OR 5 wherein R 4 and R 5 are each independently selected from the group consisting of alkyl groups having 1 to 9 carbon atoms and having no fluorine atom, a phenyl group optionally substituted by a halogen atom and a cyclohexyl group optionally substituted by a halogen atom, and optionally together form a ring, R 3 each independently represent H or CH 3 , and x represents 0 to 10; and an alkali metal salt.