Anode
- the electrode where oxidation happens
Cathode
- the electrode where reduction happens
Chemical cells
- a chemical cell produces a potential difference until the reactants are used up
Anode
Cathode
Overall reaction
Advantages
- less pollutants
- rechargable
Disadvantages
- it is dangerous to store hydrogen as it is explosive if it reacts with water
- hydrogen is difficult to store
- it is difficult to produce hyrdogen