公开(公告)号：US20220298313A1

公开(公告)日：2022-09-22

申请号：US17617068

申请日：2020-06-18

Applicant: Arkema Inc.

Inventor： Ramin AMIN-SANAYEI ,  Jeremie BREZUN ,  Mark AUBART ,  Christian COLLETTE

IPC: C08J5/18 ,  C08J9/28 ,  C08K3/22 ,  C08K3/04 ,  C08K3/36 ,  H01M50/446 ,  H01M50/403 ,  H01M50/491

Abstract: This invention discloses a reticulated film composite and a method of fabricating the reticulated film composite suitable as a separator in electrochemical cells as sound absorbing films, or as high efficiency filtering media. The reticulated film composite is produced by casting and drying of a slurry which exhibits a high yield stress (i.e. greater than 50 dyne/cm2) and comprised of a high MW resin dissolved in a solvent (i.e. having solution viscosity of higher than 100 cp at 5% in NMP or in water at room temperature) and dispersed nanoparticles with high specific surface areas (i.e. greater than 10 m2/g) such as fumed alumina, or fumed silica, or fumed zirconia or mixture thereof. This reticulated film composite exhibits superior cycling properties and high ionic conductivity with a porosity up to 80% while maintains a high dimensional stability (i.e. less than 10% shrinking) at elevated temperatures (up to 140° C.). The reticulated composite separator coating can be used in combination with an electrode coating either in two separate process steps, or in a one-step process by having a simulations multi-layer casting of electrode and separator to manufacture a lithium ion battery.

公开(公告)号：US20220306870A1

公开(公告)日：2022-09-29

申请号：US17616793

申请日：2020-06-18

Applicant: Arkema Inc.

Inventor： Ramin Amin-Sanayei ,  Jeremie BREZUN ,  Mark AUBART ,  Christian COLLETTE

IPC: C09D5/24 ,  C09D7/61 ,  C09D127/16 ,  C08K3/32

Abstract: This invention discloses a method of fabricating a reticulated solid electrolyte/separator (RSES) which is suitable both as electrolyte and separator in a solid state battery. The reticulated composite is produced by casting and drying of a slurry which exhibits a high yield stress (greater than 50 dyne/cm2) and comprised of a high MW resin dissolved in a solvent (having solution viscosity of higher than 100 cp at 5% in NMP at room temperature) and dispersed nanoparticles of solid electrolyte of high specific surface areas (i.e. greater than 1 m2/g, preferable greater than 10 m2/g) including but not limited to LLZO, LSP, or LIPON or derivatives thereof. This reticulated solid electrolyte/separator exhibits superior cycling properties and high ionic conductivity, resists lithium dendrite penetration, and maintains a high dimensional stability (less than 10% shrinking) at elevated temperatures (up to 140° C.). In addition, the present disclosure relates to electrochemical cells comprising such a reticulated film composite to act as both electrolyte and separator.