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.

公开(公告)号：US20220372308A1

公开(公告)日：2022-11-24

申请号：US17616802

申请日：2020-06-18

Applicant: Arkema Inc.

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

IPC: C09D7/61 ,  C09D7/40 ,  C09D133/12 ,  C09D127/16 ,  C08J5/18 ,  C08J9/00 ,  C08J9/28

Abstract: This invention discloses a reticulated film composite and a method of fabricating a reticulated film composite suitable as a 3 dimensional porous and conductive matrix which contains up to 80% porosity and exhibits high recovery after compression. 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 at room temperature) and dispersed nanoparticles of carbon of high specific surface areas (i.e. greater than 1 m2/g preferably greater than 10 m2/g), examples include but not limited to conductive carbon, carbon nanotubes, graphene, activated carbon or mixture thereof. This reticulated film composite exhibits high electrical conductivity (i.e. volume resistivity of less than 10,000 Ω·cm) and superior dimensional stability even at elevated temperatures (i.e. at 140° C.). It will exhibit a recovery of height or porosity after being compressed to over 50% of its height. The composite of this invention is suitable as an electrically conductive composite, as a gas diffusion layer in a fuel cell, or as a high efficiency electrode in super capacitors