Chemical cells and fuel cells

What do cells contain?

Chemicals that produce energy

What does the voltage of a cell depend on?

• Type of electrode

• Electrolyte

How is a simple cell made?

Connecting two different metals in contact with electrolyte, this produces electricity

What does a battery consist of?

• Two or more cells connected in series

• This provides a bigger voltage

If a cell can produce electricity for a certain period of time, what happens to the chemicals?

• chemicals in the cell runs out and the reaction stops

What is required for cells to produce energy?

Using metals with big difference in reactivities

What are non rechargeable batteries

• Batteries that are non rechargeable as the chemical reactions stop when one of the reactants are used up

• used in smoke alarms and tv remotes

• Alkaline is non rechargeable

What are rechargeable batteries?

• Batteries recharged as the chemical reactions are reversed when an external electrical current is supplied

• Used in laptops and phone