Hydrogen storage is definitely something we need to do more research on. Cooling as well turns out to be quite a bit more complex than for most other fluids because of the quantum effects that become relevant once you close in on the critical temperature (which is very relevant if you want to store liquid hydrogen). It’s not only a problem that hydrogen escapes when diffusing through a container, but it usually degrades the material the container is made of in the process, reducing the life time of the containers.

We’re currently looking into using various materials that can adsorb and desorb hydrogen in a controlled manner for large scale storage applications, that’s one of the possible solutions to the fact that hydrogen can diffuse through pretty much anything.