Or in the terms of its creator « The most condensed form of energy storage outside of nuclear energy ». Using super-high pressures, similar to those found at the center of the earth (about a million atmospeheres), the chemist Choong-Shik Yoo transformed Xenon Difluoride (Xe F²) to obtain this new potential technology. Future applications are energetic materials, energy storage device, fuels… Although it’s just a beginning this is really promising. For the moment it has only been produced in small quantities so there’s no information on the risk or feasibility of this technology in large quantities.
Source: Washington State University