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公开(公告)号：US20240213482A1
公开(公告)日：2024-06-27
申请号：US18261110
申请日：2022-01-27
Applicant: ZEON CORPORATION
Inventor： Kazuki ASAI
IPC: H01M4/62 , H01M4/02 , H01M4/04 , H01M10/0525 , H01M50/46
CPC classification number: H01M4/623 , H01M4/0404 , H01M10/0525 , H01M50/461 , H01M2004/021 , H01M2004/028
Abstract: A non-aqueous secondary battery includes a positive electrode, a negative electrode, an electrolyte solution, and a separator. The positive electrode includes a current collector and a positive electrode mixed material layer formed on the current collector. The positive electrode mixed material layer contains a positive electrode active material, a conductive material, and a polymer A. The polymer A includes a nitrile group-containing monomer unit and either or both of a conjugated diene monomer unit and an alkylene structural unit. The content of the polymer A in the positive electrode mixed material layer is not less than 0.01 mass % and not more than 8 mass %. The separator includes a separator substrate and an adhesive layer formed on the separator substrate. The adhesive layer contains a polymer B and has a ratio of coverage by the polymer B of not less than 3% and not more than 70%.
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公开(公告)号：US20240097279A1
公开(公告)日：2024-03-21
申请号：US18261109
申请日：2022-01-27
Applicant: ZEON CORPORATION
Inventor： Kazuki ASAI
IPC: H01M50/451 , H01M4/04 , H01M4/62 , H01M10/052 , H01M50/46
CPC classification number: H01M50/451 , H01M4/0404 , H01M4/622 , H01M10/052 , H01M50/46 , H01M2004/028
Abstract: A non-aqueous secondary battery includes a positive electrode, a negative electrode, an electrolyte solution, and a separator. The positive electrode includes a current collector and a positive electrode mixed material layer formed on the current collector. The positive electrode mixed material layer contains a positive electrode active material, a conductive material, and a polymer A. The polymer A includes a nitrile group-containing monomer unit and either or both of a conjugated diene monomer unit and an alkylene structural unit. The content of the polymer A in the positive electrode mixed material layer is not less than 0.01 mass % and not more than 8 mass %. The separator includes a separator substrate and a porous membrane formed on the separator substrate. The porous membrane contains non-conductive particles and a polymer B.
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公开(公告)号：US20210242533A1
公开(公告)日：2021-08-05
申请号：US17268478
申请日：2019-08-15
Applicant: ZEON CORPORATION
Inventor： Kazuki ASAI
IPC: H01M50/411 , H01M4/62
Abstract: Provided is a slurry composition for a non-aqueous secondary battery functional layer with which it is possible to form a functional layer that has excellent adhesiveness and that can improve rate characteristics of a non-aqueous secondary battery. The slurry composition for a non-aqueous secondary battery functional layer contains organic particles, a binder, and a melamine compound. The melamine compound constitutes a proportion of not less than 0.5 mass % and not more than 85 mass % among the total of the binder and the melamine compound.
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公开(公告)号：US20200280072A1
公开(公告)日：2020-09-03
申请号：US16650865
申请日：2018-09-05
Applicant: ZEON CORPORATION
Inventor： Koji ANNAKA , Kazuki ASAI
IPC: H01M4/60 , H01M10/0525 , H01M4/36 , H01M4/04 , H01M4/62 , H01M10/0568 , H01M10/0569
Abstract: Provided is a composition for a non-aqueous secondary battery functional layer with which it is possible to form a functional layer that has excellent heat shrinkage resistance and adhesiveness after immersion in electrolyte solution and that can cause a non-aqueous secondary battery to display excellent cycle characteristics. The composition for a functional layer contains first organic particles, second organic particles, and a solvent. The first organic particles include a polyfunctional ethylenically unsaturated monomer unit in a proportion of not less than 20 mass % and not more than 90 mass %. The second organic particles include a nitrile group-containing monomer unit in a proportion of not less than 20 mass % and not more than 80 mass % and a cross-linkable monomer unit in a proportion of not less than 0.1 mass % and not more than 10 mass %.
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公开(公告)号：US20200220138A1
公开(公告)日：2020-07-09
申请号：US16646142
申请日：2018-09-19
Applicant: ZEON CORPORATION
Inventor： Koji ANNAKA , Kazuki ASAI
Abstract: Provided is a composition for a non-aqueous secondary battery functional layer with which it is possible to form a functional layer that has excellent heat shrinkage resistance and can cause a non-aqueous secondary battery to display excellent cycle characteristics. The composition for a non-aqueous secondary battery functional layer contains organic particles and a solvent. The organic particles include a polyfunctional ethylenically unsaturated monomer unit in a proportion of not less than 55 mass % and not more than 90 mass %, and have a volume-average particle diameter of not less than 50 nm and not more than 370 nm.
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Patent Agency Ranking
公开(公告)号：US20250145846A1
公开(公告)日：2025-05-08
申请号：US18837276
申请日：2023-02-15
Applicant: ZEON CORPORATION
Inventor： Kazuki ASAI , Akito NAKAI
Abstract: A composition for an electrochemical device contains a polymer that includes a nitrile group-containing monomer unit and either or both of a conjugated diene monomer unit and an alkylene structural unit and that has a structure derived from a specific compound on at least one terminal. The composition has a concentration of divalent or higher-valent metal ions of not less than 5 mass ppm and not more than 4,000 mass ppm.
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公开(公告)号：US20240021826A1
公开(公告)日：2024-01-18
申请号：US18257099
申请日：2021-11-29
Applicant: ZEON CORPORATION
Inventor： Akito NAKAI , Kazuki ASAI
IPC: H01M4/62 , H01M10/0525
CPC classification number: H01M4/622 , H01M10/0525 , H01M4/623 , H01M2004/028
Abstract: Disclosed is a composition for an electrochemical device positive electrode. The composition enables metal capturing within a positive electrode mixed material layer and makes it possible to provide a positive electrode capable of improving the electrical characteristics of an electrochemical device. The composition comprises a copolymer A that comprises a sulfo group-containing monomer unit in an amount of 10% by mass or more and 40% by mass or less and a nitrile group-containing monomer unit in an amount of 10% by mass or more and 45% by mass or less.
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公开(公告)号：US20230323074A1
公开(公告)日：2023-10-12
申请号：US18006149
申请日：2021-08-25
Applicant: ZEON CORPORATION
Inventor： Kazuki ASAI
CPC classification number: C08K3/041 , H01M4/0416 , H01M4/625 , C08L33/20 , C08L2201/54
Abstract: Provided is a conductive material dispersion liquid that has excellent viscosity stability and is capable of forming an electrode that can cause an electrochemical device to display excellent rate characteristics. The liquid contains a conductive material including CNTs, a dispersant, and a dispersion medium. The CNTs have a thermal decomposition time of not less than 1.5 min/mg and less than 10 min/mg. The time T is calculated by preparing a thermogravimetric curve and a derivative thermogravimetric curve through thermogravimetric analysis and using formula (I): T=(T1−T0)/W0 (T0: elapsed time (min) at which derivative thermogravimetric curve takes local minimum value directly before final peak; T1: time taken (min) for mass Mi of measurement sample at elapsed time T0 minutes to decrease to M1×0.10 as determined from thermogravimetric curve; W0: weight (mg) of measurement sample when heat treatment at 600° C. in air atmosphere begins).
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公开(公告)号：US20230275234A1
公开(公告)日：2023-08-31
申请号：US18007478
申请日：2021-08-24
Applicant: ZEON CORPORATION
Inventor： Akito NAKAI , Kazuki ASAI
IPC: H01M4/62
CPC classification number: H01M4/625
Abstract: Provided is a conductive material dispersion liquid for an electrochemical device capable of forming an electrode that has excellent flexibility and smoothness and can cause an electrochemical device to display excellent cycle characteristics. The conductive material dispersion liquid contains a conductive material, a dispersant including CNTs, and a dispersion medium. The conductive material dispersion liquid has a Casson viscosity of 30 (Pa·s)1/2 or less, Casson yield value of 20 Pa1/2 or less, and hysteresis constant calculated by formula (I) (hysteresis constant C=(N1−N2)/N1) of 0.7 or less. N1 is viscosity (Pa·s) of the conductive material dispersion liquid at a shear rate of 10 s−1 when viscosity (25° C.) is measured while increasing shear rate from 10−2 s−1 to 103 s−1, and N2 is viscosity (Pa·s) thereof at a shear rate of 10 s−1 when viscosity (25° C.) is measured while decreasing shear rate from 103 s−1 to 10−2 s−1.
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公开(公告)号：US20200220174A1
公开(公告)日：2020-07-09
申请号：US16622535
申请日：2018-06-29
Applicant: ZEON CORPORATION
Inventor： Yasuhiro ISSHIKI , Kenya SONOBE , Kazuki ASAI
IPC: H01M4/62 , H01M2/16 , H01G11/38 , C08K5/16 , C08L101/02
Abstract: Provided is a binder composition for an electrochemical device that has excellent binding capacity and is capable of forming a functional layer that can improve rate characteristics and cycle characteristics of an electrochemical device (for example, a secondary battery). The binder composition for an electrochemical device contains a binder and an organonitrogen compound. The binder is a polymer including at least one functional group selected from the group consisting of a carboxyl group, a hydroxyl group, a cyano group, an amino group, an epoxy group, an oxazoline group, an isocyanate group, and a sulfo group. The organonitrogen compound includes at least one functional group selected from the group consisting of an azo group, a hydrazino group, a hydrazo group, and a nitroso group, has a 5% mass loss temperature of 140° C. or higher, and has a molecular weight of not less than 80 and not more than 1,000.
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