COMPOSITE SEPARATOR AND PREPARATION METHOD THEREFOR, AND LITHIUM-ION BATTERY

摘要

The present invention relates to a composite separator, which comprises a separator substrate material and a composite gel compounded with the separator substrate material, the composite gel comprises a gel polymer and nano barium sulphate the surface of which is modified by a lithium carboxylate group and which is dispersed in the gel polymer. The present invention also relates to a method for preparing the composite separator and to a lithium-ion battery.