【摘要】 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%。更多还原

【Abstract】 Succinic acid bis(diethylene glycol monomethyl ether) ester(1) was prepared by ring-opening reaction of diethylene glycol monomethyl ether with succinic anhydride using p-toluenesulfonic acid as the catalyst. The structure was confirmed by1 H NMR and IR. The electrochemical performance of 1. 2 mol·L- 1lithium 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- 1and a capacity retention rate of 111. 10% after 20 cycles.更多还原