丁二酸二(二乙二醇单甲醚)酯的制备及其应用

Preparation and Application of Succinic Acid Bis(diethylene glycol monomethyl ether) Ester

以二乙二醇单甲醚和丁二酸酐为原料,对甲苯磺酸为催化剂,在二甲苯中经开环反应合成了丁二酸二(二乙二醇单甲醚)酯(1),其结构经1H NMR和IR确证。采用恒电流充电法、循环伏安扫描和充放电性能测试了电解质溶液[1.2 mol·L-1双三氟甲基磺酰亚胺锂(LiTFSI)/V(1)∶V(EC)∶V(DEC)=3∶3∶4]在锂离子电池中的电化学性能。结果表明:1与石墨负极有较好的相容性,在0 V^2 V,0.1 C下充放电20次后放电比容量为346.2 mAh·g-1,容量保持率为111.10%。

Succinie acid bis （diethylene glycol monomethyl ether） ester（ 1 ） was prepared by ring-o- pening reaction of diethylene glycol monomethyl ether with succinic anhydride using p-toluenesuffonic acid as the catalyst. The structure was confirmed by 1H NMR and IR. The electrochemical performanee of 1.2 mol· L-1 lithium bis（trifluoromethane sulfonimide） in the mixed solvent[ V（1） ： V（EC） ： V （DEC） = 3 ： 3 ： 4 ] were investigated by constant current charging method, cyclic voltammogram and charge/discharge performance test. The results showed that at a current density of 0.1 C under 0 V - 2 V, the electrolyte can bring a discharge capacity of 346.2 mAh · g-1 and a capacity retention rate of 111.10% after 20 cycles.