The branch of chemistry which deals with the conversion of chemical energy into electrical energy and vice versa is called electrochemistry.
The cell in which the interconversion of electrical and chemical energy are carried out is called electrochemical cell. An electrochemical cell consists of electrodes namely cathode and anode. The non-spontaneous reaction is controlled by an external source of current. The decomposition of an electrolytic solution by passing current, which results in the liberation of corresponding gases or metals is known as electrolysis.
Applications of electrochemical cells:
- These cells are used in torches, digital cameras, hearing aids, batteries, watch, video games.
- These cells are also being used in medical implants in the body.
- These cells are also used in satellites, rocket launch equipment.
- These are generally used in tiny devices for battery storage.