ELECTROSPUN COMPOSITE SEPARATOR FOR ELECTROCHEMICAL DEVICES AND APPLICATIONS OF SAME

摘要

The invention provides a composite separator and an electrochemical device such as a battery with the composite separator. The composite separator includes a membrane comprising at least one polymer and at least one metal organic framework (MOF) material defining a plurality of pore channels, where the at least one MOF material is activated at a temperature for a period of time. The at least one MOF material is a class of crystalline porous scaffolds constructed from metal clusters with organic ligands and comprises unsaturated metal centers, open metal sites and/or structural defects that are able to complex with anions in electrolyte. The membrane is formed by electrospinning of a mixture of the at least one MOF material with a polymer solution comprising the at least one polymer dissolved in at least one solvent, such that the membrane has a porous structure with tunable pore sizes and bead-threaded fibrous morphology.