Separator for secondary battery and preparation method therefor, secondary battery, battery module, battery pack, and power consuming device

Abstract

Provided are a separator for a secondary battery and a preparation method therefor, and a secondary battery including the separator, a battery module, a battery pack, and a power consuming device. The separator for a secondary battery of the present application includes a substrate layer and a nanofiber layer provided on one surface of the substrate layer. The nanofiber layer includes a lithium supplementing agent, a polymer, and an optional conductive material; and in the total weight of the nanofiber layer, the content of the lithium supplementing agent accounts for 30.0-50.0% by weight, the content of the polymer accounts for 50.0-70.0% by weight, and the content of the conductive material accounts for 0-5.0% by weight.

Dependencies are inferred from the claim text.