Composite current collector for lithium ion battery as well as preparation method and application of composite current collector

The invention provides a composite current collector for a lithium ion battery and a preparation method and application thereof, the composite current collector for the lithium ion battery comprises a non-polar polymer intermediate layer, a polar polymer surface layer and a metal layer; wherein the polar polymer surface layers are adhered to the surfaces of the two opposite sides of the non-polar polymer middle layer, and the metal layers are loaded on the surfaces of the polar polymer surface layers. According to the composite current collector for the lithium ion battery and the preparation method and application of the composite current collector, the composite current collector comprises a non-polar polymer middle layer, polar polymer surface layers and a metal layer, the polar polymer surface layers are adhered to the surfaces of the two opposite sides of the non-polar polymer middle layer to form a base membrane of the composite current collector, and the metal layer is adhered to the polar polymer surf