One direct application would be more efficient ways to generate fuel for Hydrogen vehicles [0]. It would also be essential for mining fuel from asteroids or ga

One direct application would be more efficient ways to generate fuel for Hydrogen vehicles [0]. It would also be essential for mining fuel from asteroids or gas giant's moons as ice is not so rare, improving the sustainability of space operations. Hydrogen itself has a pretty big specific impulse, it's just not used more often than Kerosene for rockets due to safety issues. If you could achieve Metallic Hydrogen [1][2] then you would have the perfect fuel for navigating the solar system. [0]: https://en.wikipedia.org/wiki/Hydrogen_vehicle https://en.wikipedia.org/wiki/Hydrogen_vehicle [1]: https://en.wikipedia.org/wiki/Metallic_hydrogen https://en.wikipedia.org/wiki/Metallic_hydrogen [2]: http://iopscience.iop.org/article/10.1088/1742-6596/215/1/012194/meta http://iopscience.iop.org/article/10.1088/1742-6596/215/1/01...