FUNCTIONALIZED POLYMER SEPARATOR MEMBRANE FOR MITIGATING TRANSITION METAL DISSOLUTION AND TRAPPING ACIDIC SPECIES
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United States of America
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Apr 3, 2025
app pub date -
Jul 22, 2023
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Jul 22, 2023
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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.
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