公开(公告)号：US20230006262A1

公开(公告)日：2023-01-05

申请号：US17757097

申请日：2020-12-15

Applicant: ZEON CORPORATION

Inventor： Yutaka MARUHASHI ,  Masuhiro ONISHI

IPC: H01M10/0587 ,  H01M10/0525 ,  H01M50/121

Abstract: A secondary battery includes a laminate in which a positive electrode, a separator, and a negative electrode are stacked in stated order. Resistance A per unit area of a central region P that has a similar shape to a shape of a surface Z that is either or both of an affixing surface X of the positive electrode and the separator and an affixing surface Y of the negative electrode and the separator, that has a center at the same position as a center of the surface Z, and that has an area equivalent to 10% of area of the surface Z is larger than resistance B per unit area of a region Q other than the central region P at the surface Z.

公开(公告)号：US20230006263A1

公开(公告)日：2023-01-05

申请号：US17757099

申请日：2020-12-15

Applicant: ZEON CORPORATION

Inventor： Yutaka MARUHASHI ,  Masanobu SATO

IPC: H01M10/0587 ,  H01M10/0525 ,  H01M50/121

Abstract: A secondary battery includes a laminate in which a positive electrode, a separator, and a negative electrode are stacked in stated order. When either or both of an affixing surface X of the positive electrode and the separator and an affixing surface Y of the negative electrode and the separator are defined as a surface Z and the length of a connecting side of a positive electrode tab connected to the positive electrode or a negative electrode tab connected to the negative electrode is defined as L, resistance A per unit area of a region P, at the surface Z, that has a rectangular shape having the connecting side and a line segment a distance 0.3L from the connecting side as one pair of opposite sides is larger than resistance B per unit area of a region Q other than the region P at the surface Z.

公开(公告)号：US20180287189A1

公开(公告)日：2018-10-04

申请号：US15765007

申请日：2016-10-07

Applicant: ZEON CORPORATION

Inventor： Yutaka MARUHASHI ,  Junnosuke AKIIKE

IPC: H01M10/058 ,  C08L33/10 ,  C09J133/10

CPC classification number: H01M10/058 ,  C08L33/10 ,  C08L2205/025 ,  C09J133/10 ,  C09J133/26 ,  C09J2433/003 ,  H01M2/1653 ,  H01M2/1686 ,  H01M4/131 ,  H01M4/133 ,  H01M4/1391 ,  H01M4/1393 ,  H01M4/525 ,  H01M4/587 ,  H01M10/0525 ,  H01M10/0565 ,  H01M2300/0097 ,  C08L33/12

Abstract: Provided is a composition for an adhesive layer of a non-aqueous secondary battery allowing formation of an adhesive layer that can achieve both high process adhesiveness and high blocking resistance in battery members such as an electrode and a separator. The presently disclosed composition for an adhesive layer of a non-aqueous secondary battery includes a particulate polymer A that has a glass-transition temperature of no higher than 20° C. and a volume-average particle diameter of at least 100 nm and less than 450 nm, and a particulate polymer B that has a glass-transition temperature of at least 30° C. and less than 60° C. and a volume-average particle diameter larger than the volume-average particle diameter of the particulate polymer A.

公开(公告)号：US20240145782A1

公开(公告)日：2024-05-02

申请号：US18554033

申请日：2022-04-26

Applicant: ZEON CORPORATION

Inventor： Yutaka MARUHASHI ,  Masanobu SATO

IPC: H01M10/058

CPC classification number: H01M10/058

Abstract: Disclosed is an adhesive layer for non-aqueous secondary battery, which can strongly bond battery members to each other by pressurization at normal temperature while ensuring inkjet discharge characteristics, and to provide a composition for non-aqueous secondary battery adhesive layer, which can allow a non-aqueous secondary battery to exert excellent battery characteristics. The presently disclosed composition for non-aqueous secondary battery adhesive layer is a composition for non-aqueous secondary battery adhesive layer including a particulate polymer, the particulate polymer has a core-shell structure that includes a core portion and a shell portion partially covering an outer surface of the core portion, and the shell portion is formed of a polymer including an alkylene oxide group-containing monomer unit.

公开(公告)号：US20230138378A1

公开(公告)日：2023-05-04

申请号：US17906086

申请日：2021-03-22

Applicant: ZEON CORPORATION

Inventor： Yutaka MARUHASHI

IPC: H01M4/62

Abstract: An organic particle dispersion liquid for a secondary battery functional layer contains a solvent and organic particles including a polyfunctional monomer unit in a proportion of 50 mass % or more. In this organic particle dispersion liquid, the polymerization initiator decomposition product content is 50 ppm or less, and the total polymerization initiator decomposition product and unreacted polyfunctional monomer content is 500 ppm or less.

公开(公告)号：US20240120617A1

公开(公告)日：2024-04-11

申请号：US18548256

申请日：2022-03-17

Applicant: ZEON CORPORATION

Inventor： Masanobu SATO ,  Yutaka MARUHASHI

IPC: H01M50/46 ,  H01M4/139 ,  H01M50/403 ,  H01M50/417 ,  H01M50/42 ,  H01M50/443 ,  H01M50/489

CPC classification number: H01M50/461 ,  H01M4/139 ,  H01M50/403 ,  H01M50/417 ,  H01M50/42 ,  H01M50/443 ,  H01M50/489

Abstract: Disclosed is a composition for a non-aqueous secondary battery adhesive layer which comprises a particulate polymer, wherein a value of pressure sensitivity of adhesion strength as obtained using the following formula (1) is greater than 20 and less than 80: pressure sensitivity of adhesion strength (N/(m·MPa))=(T3−T1)/2 . . . (1), where T1 represents an adhesion strength (N/m) between a polyethylene separator and an adhesive layer for a non-aqueous secondary battery adhesive layer that is obtained from the composition for a non-aqueous secondary battery adhesive layer when the polyethylene separator and the adhesive layer are bonded by pressing at 25° C. and a pressure of 1 MPa for 10 seconds, and T3 represents an adhesion strength (N/m) between the polyethylene separator and the adhesive layer when the polyethylene separator and the adhesive layer are bonded by pressing at 25° C. and a pressure of 3 MPa for 10 seconds.

公开(公告)号：US20180327639A1

公开(公告)日：2018-11-15

申请号：US15777214

申请日：2016-11-28

Applicant: ZEON CORPORATION

Inventor： Keiichiro TANAKA ,  Yutaka MARUHASHI ,  Kei OURA ,  Kenji ARAI

IPC: C09J11/08 ,  C09J133/06 ,  H01M10/0525 ,  H01M4/139 ,  H01M4/04 ,  H01M4/62

CPC classification number: C09J11/08 ,  C09J7/00 ,  C09J133/06 ,  C09J201/00 ,  H01M2/16 ,  H01M4/043 ,  H01M4/13 ,  H01M4/139 ,  H01M4/62 ,  H01M4/622 ,  H01M10/0525 ,  H01M10/058

Abstract: Disclosed is a composition for non-aqueous secondary battery adhesive layer which comprises organic particles and a binder, wherein the organic particles comprise molecules having a weight-average molecular weight of 100 to 10,000, and a weight fraction of the molecules in the organic particles is 1% to 40%. Also disclosed is a non-aqueous secondary battery adhesive layer prepared by using the composition. Further disclosed is a non-aqueous secondary battery which comprises a positive electrode, a negative electrode, a separator, and an electrolysis solution, wherein at least one of the positive electrode, the negative electrode and the separator comprises the non-aqueous secondary battery adhesive layer.

公开(公告)号：US20160118663A1

公开(公告)日：2016-04-28

申请号：US14890694

申请日：2014-05-14

Applicant: ZEON CORPORATION

Inventor： Yutaka MARUHASHI

IPC: H01M4/62 ,  H01M4/04 ,  H01M10/0525

CPC classification number: H01M4/621 ,  H01M4/0404 ,  H01M4/13 ,  H01M4/139 ,  H01M4/622 ,  H01M10/0525

Abstract: The disclosed aqueous slurry composition for the positive electrode of a lithium ion secondary battery achieves suppression of both the generation of pin holes and the occurrence of bulging along the edge portion of a positive electrode mixed material layer. This slurry composition for a positive electrode of a lithium ion secondary battery includes a positive electrode active material, a conductive material, a water-soluble polymer, a particulate binder, a surfactant, and water. The water-soluble polymer contains a monomer unit containing an acid group, viscosity of a 1% by mass water solution of the water-soluble polymer is 1 mPa·s or greater to 1,000 mPa·s or less, and the surfactant includes a sulfosuccinic acid ester or a salt thereof.

Abstract translation: 所公开的用于锂离子二次电池的正极的水性浆料组合物能够抑制针孔的产生和沿着正极混合材料层的边缘部分发生凸起。 这种锂离子二次电池正极用浆料组合物包括正极活性物质，导电材料，水溶性聚合物，颗粒状粘合剂，表面活性剂和水。 水溶性聚合物含有含有酸基的单体单元，水溶性聚合物的1质量％水溶液的粘度为1mPa·s以上至1000mPa·s以下，表面活性剂包含磺基琥珀酸 酸酯或其盐。