A new solid-state electrolyte: Rubbery ‘polymer-in-salt’ containing LiN(CF3SO2)2

A new class of rubbery ‘polymer-in-salt’ electrolytes for application in solid-state lithium batteries has been explored by differential scanning calorimetry and a.c. impedance analysis. Simple phase diagrams of LiN(CF3SO2)2+LiClO4 and LiC(CF3SO2)3+LiN(CF3SO2)2 have been drawn, which are very important to determine polymer-in-salt electrolyte materials. The conductivities obtained by a.c. impedance measurement are smaller for the electrolyte that contains acetate LiOAc salt than for the electrolyte without this salt.