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公开(公告)号：US11919983B2
公开(公告)日：2024-03-05
申请号：US16485585
申请日：2018-01-18
申请人： Kureha Corporation
发明人： Kayoko Okada , Yoshiyuki Nagasawa , Aya Oikawa , Yumeno Suzuki , Shota Kobayashi
IPC分类号： C08F214/22 , C08F14/22 , C09D127/16 , H01M50/426 , H01M50/46 , C08K3/04 , C08K3/22
CPC分类号： C08F214/225 , C09D127/16 , H01M50/426 , H01M50/461 , C08K3/04 , C08K3/22 , C08K2003/2203 , C08K2003/2262 , C08K2003/2289 , C08K2003/2293
摘要： Provided is a vinylidene fluoride copolymer particle which is capable of efficiently exhibiting high adhesion between an electrode and a separator. The vinylidene fluoride copolymer particle of the present invention comprises vinylidene fluoride; and
a compound having an oxygen atom-containing functional group; wherein a ratio of oxygen atom in a surface of the vinylidene fluoride copolymer particle is higher than a ratio of oxygen atom in the vinylidene fluoride copolymer particle other than the surface thereof.-
公开(公告)号：US10074841B2
公开(公告)日：2018-09-11
申请号：US14785636
申请日：2014-05-12
申请人： Kureha Corporation
CPC分类号： H01M2/1686 , H01M2/145 , H01M2/1653 , H01M4/13 , H01M4/139 , H01M10/05 , H01M10/0525 , H01M2220/30
摘要： An object of the present invention is to provide a structure for a non-aqueous electrolyte secondary battery that can be manufactured without going through a complicated process such as passing through a poor solvent. The structure for a non-aqueous electrolyte secondary battery of the present invention comprises a positive electrode, a separator, and a negative electrode, the structure comprising an intermediate layer formed between the positive electrode and the separator and/or between the negative electrode and the separator and including vinylidene fluoride polymer particles constituting 60 to 100 parts by mass per 100 parts by mass of raw materials that constitute the intermediate layer.
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公开(公告)号：US12054605B2
公开(公告)日：2024-08-06
申请号：US17593660
申请日：2020-03-16
申请人： Kureha Corporation
发明人： Aya Shike , Yoshiyuki Nagasawa , Yasuhiro Suzuki
IPC分类号： C08L27/16 , C08F2/30 , C08F214/22
CPC分类号： C08L27/16 , C08F2/30 , C08F214/225
摘要： The vinylidene-fluoride-based polymer composition according to the present invention comprises a vinylidene-fluoride-based polymer and a specific surfactant and contains no fluorinated surfactant, wherein the specific surfactant is contained in an amount of 10 ppm or larger but less than 100 ppm in terms of mass ppm of the solid components of the composition and has an HLB value of 10 or greater. The method for producing a vinylidene-fluoride-based polymer according to the present invention comprises emulsion-polymerizing specific monomers in an aqueous medium in the presence of a specific emulsifier and an initiator without using any fluorinated surfactant, the use amount of the emulsifier being 8.5 ppm or larger but less than 100 ppm in terms of mass ppm of the monomers.
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公开(公告)号：US11912853B2
公开(公告)日：2024-02-27
申请号：US17339026
申请日：2021-06-04
IPC分类号： C08L27/16 , H01M4/62 , H01M10/0525 , H01M50/403 , H01M50/449 , C08J3/28 , H01M10/0562
CPC分类号： C08L27/16 , C08J3/28 , H01M4/623 , H01M10/0525 , H01M10/0562 , H01M50/403 , H01M50/449 , H01M2300/0068
摘要： A binder composition includes a dispersion medium and a group of binder particles. The group of binder particles is dispersed in the dispersion medium. The group of binder particles include a polymer material. The polymer material includes a constitutional unit originated from vinylidene difluoride. The group of binder particles has a number-based particle size distribution. The particle size distribution satisfies the following conditions: “0.19≤X≤0.26”, “0.69≤Y≤0.76”, and “0≤Z≤0.05”. Here, “X” represents a frequency of particles each having a particle size of less than or equal to 40 μm. “Y” indicates a frequency of particles each having a particle size of more than 40 μm and less than or equal to 110 μm. “Z” indicates a frequency of particles each having a particle size of more than 110 μm and less than or equal to 250 μm.
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公开(公告)号：US11380935B2
公开(公告)日：2022-07-05
申请号：US17059108
申请日：2019-02-21
申请人： Kureha Corporation
发明人： Yoshiyuki Nagasawa , Aya Shike
IPC分类号： H01M10/0565 , H01M50/449 , C08K5/02 , C08L27/16 , C08L27/20 , H01M10/0525 , C08F214/22 , C08F214/28 , H01M50/426 , H01M4/04 , H01M4/62
摘要： A resin composition for a non-aqueous electrolyte secondary battery that includes a vinylidene fluoride copolymer having a constituent unit derived from vinylidene fluoride and a constituent unit derived from a fluorine-containing alkyl vinyl compound. A melting point, measured in accordance with ASTM D3418, of the vinylidene fluoride copolymer is from 105° C. to 125° C., and a mass fraction Wa of the constituent unit derived from the fluorine-containing alkyl vinyl compound in the vinylidene fluoride copolymer, a degree of crystallinity DC of the vinylidene fluoride copolymer, and a degree of amorphicity DA of the vinylidene fluoride copolymer satisfy Equation (1) below: 4.7≤Wa×(DC/DA)≤14 (1).
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公开(公告)号：US10938034B2
公开(公告)日：2021-03-02
申请号：US16069197
申请日：2016-11-14
申请人： Kureha Corporation
IPC分类号： H01M4/62 , H01M4/133 , H01M10/0525 , C08L27/16 , H01M4/13 , C08F214/22 , H01M4/04
摘要： The present invention provides a binder composition which suppresses a swelling ratio in an electrolyte solution while having sufficient peel strength. The binder composition according to the present invention contains a copolymer including monomer units derived from vinylidene fluoride, a fluorine-containing alkyl vinyl compound, and a crosslinkable monomer; the content of the monomer unit derived from the fluorine-containing alkyl vinyl compound in the copolymer being not less than 2 mass % and less than 10 mass %; and the content of the monomer unit derived from the crosslinkable monomer being less than 5 mass %.
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