A Proton Exchange Membrane Fuel Cell (PEMFC) is a type of fuel cell that converts chemical energy from hydrogen and oxygen into electricity. It uses a solid polymer membrane as an electrolyte, allowing only protons to pass through while blocking electrons. This separation creates an electric current, which can be harnessed to power various applications, from vehicles to portable electronics. PEMFCs operate at relatively low temperatures, making them suitable for quick start-up and operation. They are known for their efficiency and low emissions, producing only water and heat as byproducts. This makes them an attractive option for clean energy solutions in the transition to sustainable technologies.