Researchers at EPFL and Kyoto University achieved a significant milestone in hydrogen storage by developing the first hydride-based deep eutectic solvent (DES). This stable hydrogen-rich liquid, formed by mixing ammonia borane and tetrabutylammonium borohydride, remains in liquid form at room temperature. By breaking the traditional limitations of hydrogen storage, this innovation offers a safer, more efficient method for storing and transporting hydrogen. The DES can store up to 6.9% hydrogen by weight, surpassing future targets set by the US Department of Energy. Through spectroscopy tests, researchers confirmed the ability of the liquid to release pure hydrogen gas at a low temperature of 60°C, simplifying access to hydrogen for various applications. The mixture does not crystallize under normal conditions and remains stable for weeks when dry, providing a practical solution for industries. This breakthrough not only revolutionizes hydrogen storage but also opens possibilities for custom liquid applications in chemical production and green energy. The research, carried out in collaboration with other institutes, signifies a crucial step towards making hydrogen a mainstream clean fuel for the future.