Human: I have been hearing about a new kind of fuel cell. I'd like to know more. Assistant: 
Fuel cells are devices that convert chemical energy into electrical energy. They are used in many applications, including powering cars and other vehicles. A fuel cell consists of two electrodes—an anode and a cathode—and an electrolyte that separates the two electrodes. The anode is where the fuel is oxidized, producing electrons and protons. The protons move through the electrolyte to the cathode, where they combine with electrons from the cathode to form water molecules. This reaction produces electricity, which can be used to power a device.