I second this insight. I'm a pressure vessel designer by trade. I got my numbers for all of this here[0] Liquefied hydrogen either needs to be stored cryogenic

I second this insight. I'm a pressure vessel designer by trade. I got my numbers for all of this here[0] Liquefied hydrogen either needs to be stored cryogenically as a liquid, or at a very high pressure as a gas (65 MPa). I'm ignoring adsorption methods here. Given that we can't continuously maintain -253 °C all the time, this method is impractical for mobile usage. That leaves gaseous storage. To match the current range of diesel tractor-trailers, you'd need at least 4x the volume in hydrogen to come close to the standard of 600 miles between refills. I'm going to assume we need to store 1500 L of hydrogen to match the range. Other assumptions: The tank has a max overall length of roughly 2.5 meters. Inner and outer corrosion / gouge allowance of 6mm Design temperature of 200 °C (in case of fire). Material of construction is A-387 5 2 (5% Cr, 2% Mo steel) lined with something that prevents diffusion into and hydrogen embrittlement of the base metal. Vessel consists of a cylinder with spherical head on either end. Given: Inner diameter is 890mm, shell length is 1830mm, allowable stress is 178 MPa at the design temperature, we can use equation 4.3.1 from the ASME BPVC Section VIII Division 2 to determine the minimum thickness required for the given pressure. D is the corroded inner diameter of the vessel, P is the design pressure, S is the allowable stress, and E is the weld joint efficiency (assumed 1). D / 2 * (exp[P / (S * E)] - 1) + Corrosion 902 / 2 * (exp[65 / (178 * 1)] - 1) + 12 = 211mm wall thickness The weight of just the cylinder at that thickness with a length of 1.83m (without the spherical heads) is 11,000 kg. At that weight, batteries are pretty competitive. [0]: https://www.energy.gov/eere/fuelcells/hydrogen-storage-basics-0 https://www.energy.gov/eere/fuelcells/hydrogen-storage-basic...