Hydrogen fuel cells use the chemical element hydrogen, which is made into batteries that store energy. The basic principle is the reverse reaction electrolysis of water, the hydrogen and oxygen supply of anode and cathode respectively, hydrogen in the anode after outward diffusion and electrolyte reaction, release electrons by external load to the cathode.
![Hydrogen fuel cell]( "Hydrogen fuel cell")
![氢燃料电池]( "氢燃料电池")