PEG500DME–LiTFSISafe-electrolyteLithium ion batteryIn this paper we report a poly(ethylenglycol)dimethylether–lithium bis(trifluoromethanesulfonyl) imide (PEG500DME–LiTFSI) as high viscosity, safe electrolyte for lithium ion batteries. The high molecular weight of the end-capped ether solvent is...