The Mirai uses carbon fiber tanks for this reason.
Some good info here on the transportation problem: https://www.thechemicalengineer.com/features/japan-taking-a-...
Some good info here on the transportation problem: https://www.thechemicalengineer.com/features/japan-taking-a-...
It seems that _liquid_ hydrogen escapes from small containers fairly quickly (weeks) and requires temperatures close to 0K, so cars use pressurized hydrogen _gas_ (700 bar for the Mirai) which doesn't escape.
_Mass_ storage of liquid hydrogen is no problem (months).