4. Potential for energy storage and conversion

Nanoporous solids cover a wide range of pore sizes. Systems based on mesoporous MTS with a radius greater than 5 nm exhibit strong hysteresis phenomena and are therefore ideal for use as shock absorbers. MTS and CPG grafted in the 1-3 nm radius range exhibit reversible behavior with hysteresis, and are suitable for a damping function. Microporous materials, on the other hand, generally exhibit very low hysteresis behavior, which is of interest, as we shall see, for the rapid storage/restitution of mechanical energy on the one hand, but also for the realization of new thermal machines of interest for energy recovery from a low-temperature heat source and, finally, potential electricity generation systems.