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 electricity through an electrochemical reaction. They can be used in many different applications, including powering vehicles and providing electricity for homes. The most common type of fuel cell is the proton exchange membrane (PEM) fuel cell, which uses hydrogen gas as its source of fuel. PEM fuel cells are also known as polymer electrolyte membrane (PEM) fuel cells because they use a special material called a polymer electrolyte membrane to separate the anode and cathode electrodes.