苯砜用作碳酸丙烯酯基电解液添加剂的研究

研究了添加剂苯砜（PS）对碳酸乙烯酯（EC）做酸丙烯酯（PC）基电解质与石墨负极和LiCoO2正极相容性的影响．恒流充放电法和循环伏安法研究了PS对（c（LiPF6）=1mol／L）-EC／PC（体积比1：1）电解液与电极相容性的影响，XPS法分析了PS在改性人造石墨（MAG）电极上的还原产物．结果表明：EC／PC基电解质与MAG不相容，PS可以优先还原生成C6H5SO2Li和Li2SO2，抑制PC对MAG结构的破坏，促使EC／PC基电解质与MAG相容；EC／PC基电解质与MCMB的相容性不够理想，PS可以提高EC／PC基电解质与MCMB的相容性；PS可稍微改善EC／PC基电解质与LiCoO2的相容性．

The Study of Phenyl Sulfone as an Additive of Propylene Carbonate Based Electrolyte Solution

The influence of phenyl sulfone(PS) as an additive on compatibility of ethylene carbonate(EC)/propylene carbonate(PC) based electrolyte with graphite anodes and LiCoO_2 cathode was studied.Galvanostatic charge/discharge and cyclic voltammetry were used to study the influence of PS on compatibility of(c(LiPF_6)=1 mol/L)-EC/PC(11 by volume) electrolyte solution with electrodes,XPS was used to analyze the products of PS reduction on a modified artificial graphite(MAG) electrode.The results show that EC/PC based electrolyte is intolerant to MAG,PS can be reducted earlier to C_6H_5SO_2Li and Li_2SO_2,depressing the destroy of PC to the structure of MAG,making EC/PC based electrolyte is tolerant to MAG.The compatibility of EC/PC based electrolyte with MCMB is not ideal,PS can improve the compatibility of EC/PC based electrolyte with MCMB.PS can little improve the compatibility of EC/PC based electrolyte with LiCoO_2.