公开(公告)号：US20240213483A1

公开(公告)日：2024-06-27

申请号：US18285869

申请日：2022-04-26

Applicant: Arkema Inc.

Inventor： Wensheng HE ,  Jiaxin J. GE

IPC: H01M4/62 ,  C09D5/24 ,  C09D7/61 ,  C09D127/16 ,  H01M10/0525

CPC classification number: H01M4/623 ,  C09D5/24 ,  C09D7/61 ,  C09D127/16 ,  H01M4/625 ,  H01M10/0525

Abstract: The invention relates to polymer blends comprised of a fluoropolymer and functional acrylic copolymer. The fluoropolymer is majority in the blend, accounting for 80 wt % or higher. The fluoropolymer can be polyvinylidene fluoride (PVDF) and its copolymers. VDF copolymer can contain fluorinated comonomers such as hexafluoropropylene (HFP), tetrafluoroethylene (TFE) etc, or functionalized monomers such as vinyl carboxy lic acid, phosphoric, sulfonic acid and their salts. The functional acrylic copolymers are poly (methyl) methacrylate copolymers with functional containing monomers.

公开(公告)号：US20250002618A1

公开(公告)日：2025-01-02

申请号：US18704961

申请日：2022-10-25

Applicant: Arkema Inc.

Inventor： Caiping LIN ,  Wensheng HE ,  Jiaxin Jason GE

IPC: C08F14/22 ,  C09D5/24 ,  C09D127/14 ,  H01M4/62 ,  H01M10/0525

Abstract: Disclosed is a vinylidene fluoride (co)polymer having a beta phase intensity ratio of greater than 5 and the polymerization process for making the vinylidene fluoride based polymer or copolymer.

公开(公告)号：US20210184311A1

公开(公告)日：2021-06-17

申请号：US16760193

申请日：2018-10-30

Applicant: Arkema Inc.

Inventor： Amy A. LEFEBVRE ,  Thomas FINE ,  James F. COFFEY ,  Ramin AMIN-SANAYEI ,  Wensheng HE

IPC: H01M50/426 ,  H01G11/52 ,  H01M50/443 ,  H01M50/446 ,  H01M50/449 ,  H01M8/1048

Abstract: The invention relates to a separator for non-aqueous-type electrochemical devices that has been coated with a polymer binder composition having polymer particles of two different sizes, one fraction of the polymer particles with a weight average particle size of less than 1.5 micron, and the other fraction of the polymer particles with a weight average particle size of greater than 1.5 microns. The bi-modal polymer particles provide an uneven coating surface that creates voids between the separator and adjoining electrodes, allowing for expansion of the battery components during the charging and discharging cycle, with little or no increase in the size of the battery itself. The bi-modal polymer coating can be used in non-aqueous-type electrochemical devices, such as batteries and electric double layer capacitors.

公开(公告)号：US20180072829A1

公开(公告)日：2018-03-15

申请号：US15557977

申请日：2016-03-15

Applicant: Arkema Inc.

Inventor： Ramin AMIN-SANAYEI ,  Wensheng HE ,  James F. COFFEY ,  Chris CAVALIER ,  Steven M. BAXTER ,  Sara REYNAUD

IPC: C08F114/22

CPC classification number: C08F114/22 ,  C08F2/38 ,  C08F214/222

Abstract: The invention relates to fluoropolymers that have been modified with low molecular weight, polymeric chain transfer agents, and uses of the modified fluoropolymers. The modified fluoropolymers provide enhanced properties to the fluoropolymer, such as increased adhesion, and hydrophilic characteristics. The modified functional fluoropolymers are useful in many applications, including as binders in electrode-forming compositions and separator compositions, for hydrophilic membranes and hollow fiber membranes, as an aqueous and a solvent cast coating for baked decorative and protective coatings, and as a tie layer between a fluoropolymer layer and an incompatible polymer layer.

公开(公告)号：US20170125815A1

公开(公告)日：2017-05-04

申请号：US15315965

申请日：2015-06-03

Applicant: Arkema Inc.

Inventor： Ramin AMIN-SANAYEI ,  Jason POMANTE ,  Wensheng HE

IPC: H01M4/62 ,  H01M10/0525 ,  H01M4/139 ,  H01M4/04

CPC classification number: H01M4/623 ,  H01M4/0404 ,  H01M4/0416 ,  H01M4/139 ,  H01M4/622 ,  H01M10/052 ,  H01M10/0525

Abstract: The invention relates to an electrode formed by the blending of dry active powdery electrode forming materials with an aqueous binder dispersion, and the subsequent adhering of the wet binder/dry active powdery electrode-forming materials blend to an electroconductive substrate, resulting in an electrode. The aqueous binder is preferably a fluoropolymer, and more preferably polyvinylidene fluoride (PVDF). The hybrid process provides the good dispersion and small particle size of a wet process, with the energy savings and reduced environmental impact of a dry process. The resulting electrode is useful in energy-storage devices.

公开(公告)号：US20150340676A1

公开(公告)日：2015-11-26

申请号：US14410674

申请日：2013-11-01

Applicant: Arkema Inc.

Inventor： John Schmidhauser ,  Scott R. GABOURY ,  Ramin AMIN-SANAYEI ,  Chirstophe ROGER ,  Wensheng HE ,  Rosemary HEINZE

IPC: H01M2/16 ,  H01M2/14

CPC classification number: H01M2/1673 ,  H01G11/52 ,  H01M2/145 ,  H01M2/1653 ,  H01M2/166 ,  H01M2/1686 ,  Y02E60/13

Abstract: The invention relates to integrated electrode separators (IES), and their use in lithium ion batteries as replacements for free standing separators. The IES results from coating an electrode with a fluoropolymer aqueous-based emulsion or suspension, and drying the coating to produce a tough, porous separator layer on the electrodes. The aqueous fluoropolymer coating may optionally contain dispersed inorganic particles and other additives to improve electrode performance such as higher ionic conduction or higher temperature use. The IES provides several advantages, including a thinner, more uniform separator layer, and the elimination of a separate battery component (separator membrane) for a simpler and cost-saving manufacturing process. The aqueous separator coating can be used in combination with a solvent cast electrode as well as an aqueous cast electrode either in two separate process steps, or in a one-step process.

Abstract translation: 本发明涉及一体化电极分离器（IES），它们在锂离子电池中用作独立分离器的替代物。 IES通过用含氟聚合物水性乳液或悬浮液涂覆电极，并干燥涂层以在电极上产生坚韧的多孔隔离层。 含氟聚合物涂层可以任选地包含分散的无机颗粒和其它添加剂以改善电极性能，例如更高的离子传导或更高的温度使用。 IES提供了几个优点，包括更薄，更均匀的隔离层，以及消除单独的电池组件（隔膜），以实现更简单和节省成本的制造工艺。 水分离器涂层可以在两个单独的工艺步骤中或在一步法中与溶剂流延电极以及水性浇铸电极组合使用。