Abstract
This paper is an adaptation of the original one, which gained the "Salvador Senent” award, dealing with "Chemistry and Energy", announced by the Specialized Group in Didactic and History of Chemistry and sponsored by Forum of the Nuclear Spanish Industry. Its aim is to describe magnitudes, processes and devices of interest in order to understand some important contributions of Chemistry in electrical energy storage and production. The main −thermodynamic, kinetic, structural, reactivity and, definitely, chemical− principles implied in these processes are revised.