The future is LOHC. Liquid Organic Hydrogen Carriers.
this will enable transportation of hydrogen at room temp in the same way you can transport oil or gas.
If the efficiency of storage vs the mass of the storage medium is advantageous, and the efficiency of producing hydrogen can improve, it might catch batteries.
https://www.google.com/search?q=Liquid+Organic+Hydrogen+Carriers
OTOH, stationary storing of hydrogen obviates the need for lighter medium, which could take the pressure off the supply constraints of making more batteries for mobile use.
Old school:
https://www.google.com/search?q=storing+hydrogen+in+hydrides