Temperature and concentration effects on the conductivity of LiAlCl4/SOCl2electrolyte solutions

The conductivity of 1.8 M LiAlCl4/SOCl2 electrolyte solutions showed the gr eatest temperature dependence at 298 K. Raman spectra results suggest that the adduct compound is Li(SOCl2)(y-x)(SO2)(x)(+). The structural changes in LiAlCl4/SOCl2 electrolyte solutions were analyzed using Li-7 NMR spectrosc opy. The Li-7 spin-lattice relaxation rate indicated a change in the ionic structure of the electrolyte near 295 K which was confirmed by measuring th e chemical shifts and relaxation times under Various temperatures and conce ntrations. The concentration effects on conductivity of LiAlC4/SOCl2 electr olytes were also investigated. All experimental results suggest that the tr ansition phenomenon in LiAlCl4/SOCl2 electrolyte solutions is related to th e transformation between Li(SOCl2)(y-x)(SO2)(x)(+) and Li(SOCl2)(y)(+). (C) 2001 Elsevier Science B.V. All rights reserved.