By studying the freezing point of a series of LiCl solutions,the change of conductivity with temperature and the influence on the electrochemical performance of supercapacitors.The results show that the freezing process and freez-ing point of LiCl electrolyte are closely related to the concentration.Compared with other electrolytes,we found that the frozen LiCl solution still has an ionic conductivity of 0.413 mS/cm at-60 ℃,and the supercapacitor can work normally using it as electrolyte.In addition,the 6.5 mol/L LiCl electrolyte is a pure liquid phase at-60 ℃,with a maximum con-ductivity of 2.44 mS/cm.The capacity retains 46.27％compared with room temperature,and has good charge and dis-charge performance.
supercapacitorsLiClelectrolytes concentrationlow temperature performance
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