| 초록 |
A series of organic/inorganic hybrid branched (BCP) and linear (LCP)-graft copolymers comprising poly(ethylene glycol) methyl ether methacrylate (PEGMA), 3-(3,5,7,9,11,13,15-heptaisobutyl-pentacyclo[9.5.1.13,9.15,15.17,13]octasiloxane-1-yl)propyl methacrylate (MAPOSS), and ethylene glycol dimethacrylate (EGDMA) were synthesized via reversible addition fragmentation chain transfer (RAFT) polymerization for applications to solid polymer electrolyte (SPE) materials in high-temperature lithium-ion batteries. Dimensionally-stable free-standing films were obtained when the MA-POSS contents in BCP and LCP are larger than 21 mol % and maintained its original shape and storage modulus even if temperature increases up to 90 oC. All-solidstate battery prepared using BCP electrolyte showed reasonable cell performance at 60 oC without causing safety problem, demonstrating a great potential of BCP as SPE materials for high-temperature battery systems. |
