公开(公告)号：WO2021188421A1

公开(公告)日：2021-09-23

申请号：PCT/US2021/022332

申请日：2021-03-15

Applicant: DUPONT SAFETY & CONSTRUCTION, INC.

Inventor： AFSHARI, Mehdi ,  KANG, Byoung Sam

IPC: H01M10/658 ,  H01M50/143 ,  H01B3/04 ,  H01B3/30 ,  D04H1/4342 ,  D21H13/26 ,  H01B3/48 ,  H01M10/653

Abstract: A paper suitable for use in a battery or battery pack as a flame barrier or thermal insulation, the paper comprising 60 to 95 weight percent aerogel powder and 5 to 40 weight aramid polymer fibrils; the paper having a thickness of 50 to 4000 micrometers.

公开(公告)号：WO2021188418A1

公开(公告)日：2021-09-23

申请号：PCT/US2021/022324

申请日：2021-03-15

Applicant: DUPONT SAFETY & CONSTRUCTION, INC.

Inventor： AFSHARI, Mehdi ,  KANG, Byoung Sam

IPC: H01M50/423 ,  D21H13/26 ,  H01M50/44 ,  H01M50/446 ,  H01M50/494 ,  H01M50/497 ,  H01M10/052 ,  H01M10/056 ,  H01M50/431

Abstract: A solid-state composite electrolyte, suitable for use in solid-state batteries, and a battery comprising same, the solid-state composite electrolyte comprising 70 to 99 weight percent inorganic solid electrolyte and 1 to 30 weight percent aramid polymer fibrils, based on the total weight of the inorganic solid electrolytes and aramid fibrils in the solid-state composite electrolyte, wherein the aramid polymer fibrils have: i) a diameter of 10 to 2000 nanometers, ii) a length of 0.2 to 3 millimeters, iii) a specific surface area of 3 to 40 square meters/gram, and iv) a Canadian Standard Freeness of 0 to 100 milliliters; the solid-state composite electrolyte having a thickness of 5 to 1000 micrometers.

公开(公告)号：WO2023059989A1

公开(公告)日：2023-04-13

申请号：PCT/US2022/076852

申请日：2022-09-22

Applicant: DUPONT SAFETY & CONSTRUCTION, INC.

Inventor： BYOUNG KANG, Sam ,  AFSHARI, Mehdi ,  FRANCE, Brian

IPC: D21H19/30 ,  D21H21/52 ,  D21H13/26 ,  H01M50/403 ,  H01M50/423 ,  H01M50/4295 ,  H01M50/44 ,  H01M50/449

Abstract: A nonwoven sheet material comprising a substrate and an applied fibril covering on said substrate, and process for making same, wherein the substrate is a paper, a spunbonded fibrous sheet, or a fibrous or non-fibrous membrane, and wherein the applied fibril covering comprises fibrils having a diameter of 1 to 5000 nanometers, a length of 0.2 to 3 millimeters, a specific surface area of 3 to 40 square meters/gram, and a Canadian Standard Freeness of 0 to 10 milliliters, the fibrils comprising an aramid polymer.

公开(公告)号：WO2022031302A1

公开(公告)日：2022-02-10

申请号：PCT/US2020/052052

申请日：2020-09-22

Applicant: DUPONT SAFETY & CONSTRUCTION, INC.

Inventor： AFSHARI, Mehdi ,  KANG, Byoung Kang ,  FRANCE, Brian R.

IPC: D21H13/26 ,  D21H15/10 ,  D21H17/34 ,  F16D69/02

Abstract: A paper suitable for use as a separator or thermal or fire insulation for use in or with electrochemical cells, and an electrochemical cell comprising the same, the paper having 90 to 99 weight percent aramid fibrous pulp comprising aramid polymer fibrils and 1 to 10 weight percent polyvinylpyrrolidone present as a coating on the surface of the fibers, the paper having a thickness of 10 to 40 micrometers and a tensile strength of at least 15 megapascals or greater.

公开(公告)号：WO2020036800A1

公开(公告)日：2020-02-20

申请号：PCT/US2019/045642

申请日：2019-08-08

Applicant: DUPONT SAFETY & CONSTRUCTION, INC.

Inventor： AFSHARI, Mehdi ,  KANG, Byoung Sam

IPC: D21H13/26 ,  H01M2/16

Abstract: A paper suitable for use as a separator paper in electrochemical cells and an electrochemical cell comprising same, the paper comprising as the sole fibrous components (95) to (100) weight percent fibrils and (0) to (5) weight percent aramid fibrids and having a thickness of (10) to (40) micrometers and a tensile strength of at least (15) megapascals or greater, the fibrils comprising a polymer blend of (80) to (96) weight percent polyparaphenylene terephthalamide and (4) to (20) weight percent of polyvinylpyrrolidone; the fibrils having a diameter of (10) to (2000) nanometers, a length of (0.2) to (3) millimeters, a surface area of (3) to (40) square meters/gram, and a Canadian Standard Freeness of (0) to (10) milliliters.