NOVELTY - The device comprises a solid-state active element, and a stress-inducing unit. The solid-state active element is configured for taking up, storing and releasing hydrogen. The stress-inducing unit: is attached to the active element, is configured for applying a mechanical load to the active element; comprises an electromechanical device attached to one side of the active element, a piezoelectric crystal and a lattice mismatch; and is further configured for pushing or pulling the active element at a substrate and a thin film for bending the active element out of its plane.    USE - The device is useful in a system for improved uptake, storage and release of hydrogen, which is useful for a fuel cell (all claimed).    ADVANTAGE - The highly secure and stable device is easy to manufacture.    DETAILED DESCRIPTION - The device comprises a solid-state active element, and a stress-inducing unit. The solid-state active element is configured for taking up, storing and releasing hydrogen. The stress-inducing unit: is attached to the active element, is configured for applying a mechanical load to the active element; comprises an electromechanical device attached to one side of the active element, a piezoelectric crystal and a lattice mismatch; and is further configured for pushing or pulling the active element at a substrate and a thin film for bending the active element out of its plane. The electromechanical device is configured for pushing and pulling the active element at a side for inducing compressive or tensile stress in the active element, and is controlled by an electrical control circuit. The thin-film is placed on the substrate. The active element is mounted on a fixed frame at or near the in-plane sides of the active element. The piezoelectric crystal is located at or near a middle of the active element. The lattice mismatch is positioned between the thin film and the substrate of the active element and/or any other microstructural or thermal origin leading to internal stress inside the thin film. INDEPENDENT CLAIMS are included for:    (1) a method for the improved uptake, storage and release of hydrogen; and    (2) a method for providing a fuel cell with hydrogen gas.