Those Cella hydrogen storage beads are a one time use media that must be sent back and recycled after every use. Out of the question for a car.
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Hydrogen/ oxygen reaction releases 140,000 joules per gram of hydrogen. This is only .0388 kW. A 50kWh battery would match 1288.7 g of hydrogen.
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The best carbon nano storage systems are 700 psi at liquid nitrogen temps and only hold 40g/ Liter so a 32 Liter tank would compare for energy storage but a battery EV is 90% efficient from battery to wheels and fuel cells are only 50% so 60 liters for the hydrogen tank is getting pretty large.
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Research « ALL-CRAFT
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The best high temp hydrolysis manufacturing of hydrogen is only 60% efficient so round trip efficieny of hydrogen for grid storage is also a very poor option compared to batteries.
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https://en.wikipedia.org/wiki/High-t...e_electrolysis