| 초록 |
Poly vinylidene fluoride-g-poly(ethylene glycol) methyl ether methacrylate (PVDF-g-POEM) was synthesized for electrochemical application as a electrolyte and a separator. The double comb copolymer was synthesized via atom transfer radical polymerization (ATRP) method. By tuning PVDF properties by grafting to semi-crystalline hydrophobic polymer PVDF chains with hydrophilic POEM results in reduced the crystallinity nature of PVDF lead to decrease of ductility of PVDF which would provide better segmental motion of polymers. Hydrophilic domains grants favorable locations for incorporated lithium salts, which leads to better ionic pathways. Ionic conductivity was calculated and measured by placing the electrolyte between stainless steel using a potentiostat. The polymer was characterized by FTIR, EF-TEM, DSC, and XRD. The polymer PVDF-g-POEM serves as a matrix for the membrane electrolyte with high ionic conductivity which is comparable to several conventional polymer based electrolytes. |
