Abstract:The influence of Cl₂, Br₂ and BrCl on the cathodic reduction process of 1M LiAlCl₄/SOCl₂ solution is studied in cyclic voltammetry method.The results show that an irreversible reduction peak of SOCl₂ at about 2.6V(vs Li/Li⁺, the same as below) appears during cathodic process of 1M LiAlCl₄/SOCl₂ solution on glassy carbon electrode.After being pretreated at 4.9 V for 5 minutes, the reduction peaks of SCl₂(~3.6 V)and Cl₂(~3.3 V)as oxidation products are found.The addition of Cl₂ to the solution enhances the reduction peaks at~3.3 V;and the addition of Br₂ causes the Br₂ reduction peaks at~3.1 V to appear;the reduction peak currents of SOCl₂ drop in both cases.The addition of BrCl to 1M LiAlCl₄/SOCl₂ solution makes the existence of both Cl₂ and Br₂ reduction peaks.With the increase in the BrCl concentration, the Cl₂ reduction peaks are raised but the peaks of Br₂ decline, and the peaks of SOCl₂ gradually disappear.