Solid polymer electrolytes from a fluorinated copolymer bearing cyclic carbonate pendant groups

2018

International audience; A poly(vinylidene fluoride-co-(2-oxo-1,3-dioxolan-4-yl)methyl 2-(trifluoromethyl)acrylate) random copolymer, poly(VDF-co-MAF-cyCB), with a MAF-cyCB weight fraction of 59% was synthesized via free radical copolymerization of VDF and MAF-cyCB, which is a methacrylate bearing cyclocarbonate side-chain. This copolymer showed nano-structured morphology, where crystalline PVDF-rich domains co-existed with amorphous poly(VDF-co-MAF-cyCB) segments. Solid polymer electrolytes were further obtained by loading the poly(VDF-co-MAF-cyCB) copolymer with various amounts of LiClO4. The added lithium salt was dissolved in the poly(VDF-co-MAF-cyCB) amorphous phase, which allowed the f…