<human>: I've heard a lot of people talking about a new kind of fuel cell that can be used to power vehicles. I'm wondering what this is.
<bot>: Fuel cells are devices that convert chemical energy from fuels into electricity. They are usually made up of two electrodes, one called the anode and the other the cathode. The anode is where the fuel is oxidized, producing electrons and protons. The protons then move through a membrane to the cathode, where they combine with oxygen to form water. This process produces electrical current, which can then be used to power electric motors or other devices.