CONDUCTIVITY STUDY ON IONIC LIQUID POLYMER COMPLEXES/

Ternary salt mixtures, consisting of triethylmethylammonium benzoate ( TEMAB), lithium acetate (LiOAc) and lithium bis(trifluoromethylsulfony l) imide (LiTFSI), form stable molten salts at moderate temperatures a t certain compositions. A typical composition of the molten salts is T EMAB/LiOAc/LiTFSI = 7/2/1 in molar ratio, and the glass transition tem perature, the crystallization temperature and the melting temperature are -52 degrees C, 30 degrees C and 55 degrees C, respectively. Quench ed salt mixture having the above composition forms a stable supercoole d liquid at room temperature, and the ionic conductivity is 10(-4) Scm (-1) at 30 degrees C and 10(-3) Scm(-1) at 60 degrees C. Some commerci ally available polymers such as polyacrylonitrile and poly(vinyl butyr al) are compatible with the salt mixture to result in him forming poly mer electrolytes with 1-2 order(s) of magnitude of loss of the molten salt conductivity.