PES (polyethersulfon) membrane is an insulator and does not conduct electricity. PES must be a porous material to serve as a membrane. There are numerous conductive composites based on PES. Search the literature which one fits your requirements.
Electrospinning polymers often leads to a favorable outcome in terms of conductivity (subject to experimental parameters). Literature exists for the operational procedure (e.g. Article Steady state electrospinning of uniform polyethersulfone nan...