Polymer Electrolyte Membrane

A Polymer Electrolyte Membrane (PEM) is a special thin film that transports ions while blocking gases and liquids. It’s central to fuel cells, where it allows protons (positive ions) to move from the anode to the cathode, generating electricity through a chemical reaction with hydrogen and oxygen. Made from plastic-like materials, PEMs are conductive to ions but impermeable to fuels and air, ensuring efficient energy production. They are lightweight, durable, and operate at relatively low temperatures, making PEM fuel cells suitable for clean energy applications like vehicles and portable power.