I work on systems under high pressure, especially the ones containing hydrogen such as hydrides or superhydrides. In order to describe, explore ans predict the properties of those systems, I use numerical simulation at the atomic and electronic scales. Electronic properties are described by the principles of quantum mechanics (Density Functional Theory). I also work on actinide oxides and functional oxides for energy applications, in particular on proton, anionic or mixed conductors, that can be used as materials for fuel cells or electrolyzers.