Electrochemistry is a branch of chemistry that studies the relationship between chemical reactions and electrical phenomena. It focuses primarily on the conversion of chemical energy into electrical energy and vice versa, through redox reactions.

This field has many important applications, such as electricity generation in fuel cells and cells, energy storage in batteries, electrolysis to produce substances like hydrogen or oxygen, and the extraction and deposition of metals. It is also used to combat corrosion, monitor the environment, and develop chemical and biological sensors.

Electrochemistry is an interdisciplinary science that combines several fields. Thermodynamics helps us understand whether a reaction is possible and under what conditions it reaches equilibrium. Kinetics studies the rate of reactions, particularly electron transfer. Finally, transport phenomena (diffusion, migration, convection) influence the behavior of electrochemical systems. It also relies on physics and electricity to design and optimize electrochemical devices.