The development of renewable energy technologies is nowadays strictly connected to the capability of realising efficient and economically competitive storage systems. The possibility of storing energy allows the optimal exploitation of intermittent energy sources, reducing overall energy consumption for the energy demand satisfaction and increasing the operating flexibility. Within this framework, thermochemical storage is becoming a hot topic in the field of thermal storage, due to higher theorical energy density achievable with respect to sensible and latent heat storage systems. At the state of art, only small prototypes exist and the main part of the research activity is still at the material level, which is problematic due to chemical instability issues of the involved materials.