“…The first one focuses on adding functionalities to structures by embedding off-the-shelf thin batteries into composite laminates or sandwich panels [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ]. The other one aims to realize multifunctional composite materials where the reinforcement elements act as the electrodes while the polymeric matrix works as the electrolyte and as a structural binder for the fibers [ 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. An alternative path could come from the use of all-solid-state electrolytes.…”