ABSTRACT Membrane fouling remains a major limitation for the long‐term operation of pressure‐driven separation processes. Although piezoelectric membranes provide a promising route for self‐powered antifouling, it is still challenging to fabricate porous membranes that combine high permeability with high electroactive β‐phase content through scalable processes. Here, we report a dual‐side synergistic polarization strategy based on a modified non‐solvent induced phase separation process, in which