Polyamide-imide Coated Separator for High-Energy Rechargeable Lithium Batteries

摘要

The present disclosure or invention preferably relates to polyamide-imide coated membranes, separator membranes, or separators for lithium batteries and corresponding batteries, such as high-energy or high-voltage rechargeable lithium batteries. The separator preferably comprises a porous or microporous polyamide-imide coating or layer on at least one side of the polymeric microporous layer, membrane or film. The polyamide-imide coating or layer may include other polymers, additives, fillers, or the like. Polyamide-imide coatings can provide high temperature performance (HTMI function), for example, to provide oxidation resistance, to block dendrite growth, to add dimensional and/or mechanical stability, to reduce shrinkage, and to In addition, it may be suitable to prevent electronic short circuits at temperatures above 200° C., and/or the like. The microporous polymeric base layer may be suitable for holding at least a liquid, gel or polymer electrolyte, for conducting ions, and/or for blocking the flow of ions between the anode and cathode in case of thermal runaway (shutdown function). have. Polyamide-imide coated separators, for example, to space electrodes at high temperatures, provide oxidation resistance, block dendrite growth, add dimensional stability, reduce shrinkage, high temperature performance To add (HTMI function), to prevent electronic short circuit at temperatures above 200° C., to increase puncture strength, and/or to block ion flow between the anode and cathode in case of thermal runaway (shutdown function) ) may be suitable. While use in secondary lithium cells may be desirable, the present polyamide-imide coated membranes can be used in cells, cells, primary cells, capacitors, fuel cells, textiles, filters and/or composites, and/or other uses, devices and and/or as a layer or component in the like.