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.