公开(公告)号：US20250108365A1

公开(公告)日：2025-04-03

申请号：US18357107

申请日：2023-07-22

Applicant: GM GLOBAL TECHNOLOGY OPERATIONS LLC

Inventor： Xingcheng Xiao ,  Nathaniel Z. Hardin ,  Ion C. Halalay

IPC: B01J39/05 ,  B01J39/19 ,  B01J47/12 ,  C08G69/32 ,  C08G69/48 ,  C08J5/22 ,  H01M50/403 ,  H01M50/423

Abstract: A functionalized polymeric separator membrane, including a polymer backbone chosen from an aramid-based polymer, a polyamide-based polymer, or a polyimide-based polymer, or combinations thereof; and further comprising one or more functional side groups (-FSG) capable of trapping transition metal ions and acidic species. The functionalized polymeric separator membrane may be a sulfonated polyaramid separator membrane. Sulfonation of polyaramid separators add functional groups that trap both acidic species and TM ions, thereby suppressing anode damage caused by TM deposition onto the anode by a two-step process. The functionalized polymer separator membranes may be used with Li-ion, Li-metal, or Sodium-ion batteries.