Patent ID: 9136516
Filing Date: 2015-09-15
Classification: B82Y,H01M,Y02E,Y10T

Abstract:
1. A separator substrate, comprising: a substrate having a bulk portion and a surface portion, the surface portion having at least a first porous area with a net negative charge and at least a second porous area with a net positive charge; ionic particles coupling to at least a part of each one of the first porous area and the second porous area, the ionic particles including first ionic particles having a net positive charge and coupling to the first porous area, and second ionic particles having a net negative charge and coupling to the second porous area; and a graft agent coupled with the ionic particles, the graft agent comprising at least one of primary amine-containing silane, secondary amine-containing silane, tertiary amine-containing silane, quaternary amine-containing silane, carboxylic containing silane, sulfonate containing silane, or phosphate-containing silane, wherein the coupling between the part of the at least one porous area and the ionic particles results in at least one of electrochemical performance, chemical stability, thermal stability, wettability, and mechanical strength of the separator substrate, and at least a portion of the ionic particles are coupled to interior walls of pores of the porous area.