An asymmetric polyether sulfone membrane as an efficient separator in aluminium–graphite batteries with EMIMCl/AlCl3 electrolyte

Abstract

This study reports the testing of a polyethersulfone (PES) membrane as an alternative separator to conventional glass fibers (GF) in aluminium–graphite batteries (AGBs) using an aprotic EMIMCl/AlCl₃ electrolyte. At a charge rate of 0.1 A g⁻¹ and a discharge rate of 1 A g⁻¹, the AGB with the PES membrane demonstrated superior capacity and reduced self-discharge compared to the GF-based cell.