The advances in cryogenic propellant management technology by use of micro/nano wicking structures proposed in this project may provide a fundamental breakthrough in space propulsion systems. Prototype systems, which are to be developed under this program, will provide game-changing enhanced capability for longer space missions and in management of cryogens in a space environment. Benefits such as cryogenic propellant refueling depots have been suggested. The utilization of these coatings will greatly reduce chill-down times, life-cycle costs, and system complexity, thereby saving time and reducing costs. One benefit to the commercial space industry is the quick and safe loading of cryogenic propellant tanks could be enabled by further development and deployment of this technology. The technology is applicable to energy systems and superconducting power systems of interest to the Department of Energy (DOE) and the Department of Defense (DOD).