Branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions WordNet 3.0 & Open English WordNet

Electrochemistry is the branch of physical chemistry concerned with the relationship between electrical potential difference and identifiable chemical change. Wikipedia

A branch of chemistry that studies chemical reactions which take place in a solution at the interface of an electron conductor (a metal or a semiconductor) and an ionic conductor (the electrolyte), and which involve electron transfer between the electrode and the electrolyte or species in solution. OmegaWiki

The science of the chemistry associated with the flow of electricity, especially at the surface of an electrode. Wiktionary

Chemistry pertaining to electricity. Wiktionary (translation)