Multi-stage functional module coupled and complemented diaphragm and preparation method thereof

The invention provides a multi-stage functional module coupled and complemented diaphragm and a preparation method thereof. According to the invention, multiple stages of functional modules of the diaphragm are effectively constructed and functions and effects of the modules are coupled and complemented, wherein the multiple stages of functional modules comprise structural multi-stage and functional multi-stage concepts of the functional modules, so that the finally obtained diaphragm can implement improvement of electrochemical performance and battery performance of a lithium battery system. 本发明提供了一种具有多级功能模块耦合互补的隔膜及其制备方法，本发明通过有效构筑隔膜的多级功能模块并且模块之间功能作用耦合互补，其中多级功能模块包含其结构多级化及功能多级化概念，最终得到的隔膜能实现锂电池体系电化学性能及电池性能的提高。