复合金属有机框架材料@富勒烯的锂电池隔膜的制备

Preparation of Polymer Separator Combined with Metal-organic Frameworks@Fullerene and its Application in Lithium Battery

本文以聚丙烯薄膜为基质,先将聚多巴胺复合在隔膜上,再采用金属有机框架材料@富勒烯作为复合材料吸附于聚丙烯隔膜上从而改变电池隔膜的结构和功能,并就表面形貌、红外光谱、孔隙率、电解液润湿性、电化学性能这些方面进行对比。结果表明,金属有机框架材料@富勒烯可以很好地吸附于隔膜上,并且在隔膜上形成酰胺键。附有金属有机框架材料@富勒烯的复合隔膜电解液湿润性、孔隙率测试结果均优于普通隔膜,并且装备该新型隔膜的锂电池的性能也满足要求。

Due to the defects of low electrolyte wettability,poor thermal stability and slow ion transmission,the widely used commercial polypropylene separator limits the performance of the battery.Therefore,the structure and function modification of polypropylene separator is an important means to improve the battery performance.In this paper,polypropylene film was used as the substrate,polydopamine was composite on the separator,and metal-organic frameworks with fullerene were used as the composite material adsorbed on the polypropylene separator to change the structure and function of the battery separator.Subsequently,the surface morphology,infrared spectrum,porosity,electrolyte wettability and electrochemical properties were compared.The results show that metal-organic frameworks and fullerenes can be well adsorbed on the separator and form amide bonds on the separator.The wettability and porosity of the composite separator with fullerene were better than those of the ordinary separator,and the performance of the battery equipped with the new separatoe also meets the requirements.