Electrochemistry is the study of the chemical processes that result in the movement of electrons. The movement of electrons is known as electricity which gets generated by movements of the electrons from one element to another element. It is known as an oxidation-reduction reaction.
We all know that every object has a tendency to move from a position of higher potential to a position of lower potential. Even winds flow from an area of higher pressure to an area of lower pressure.
Similarly, even electrical current follows the same convention.