Working principle of proton exchange membrane fuel cell

Based on chemical reactions. Proton exchange membrane fuel cell (PEMFC) is a device that converts chemical energy into electrical energy. Its working principle is based on chemical reaction. Hydrogen is oxidized at anode, electrons flow into cathode through external circuit to generate current, and protons permeate into cathode through solid polymer electrolyte or proton exchange membrane. Proton exchange membrane fuel cells are different from traditional fuel cells. Proton exchange membrane fuel cell uses solid proton exchange membrane to isolate oxygen and hydrogen, so that hydrogen can be anodized to produce electrons and protons. Electrons flow into the cathode through the external circuit, and protons reach the cathode through the proton exchange membrane, and combine with oxygen to generate water.