Hydrogen vs. Battery Electric Cars

Have you looked at ammonia, instead?

You can liquefy ammonia with 9 bar, versus hundreds; ammonia is already the second-most produced industrial chemical on the planet; ammonia can be "cracked" back to hydrogen (and nitrogen); direct ammonia fuel cells (DAFCs) also exist; ammonia can also be used in gas and diesel engines, to be burned instead of hydrocarbons. Also, adding ammonia to water reduces the voltage needed for electrolysis to under a third (1.23V -> 0.37V), so you could just use ammonia as a hydrogen storage device. Plus, ammonia makes convenient dense salts - carbonate (density 1.5 kg/l), sulphate(1.8), and diammonium phosphate (1.62, but it has an extra hydrogen) - that could be used to transport and store it more conveniently. 

Sorry, I get carried away on the subject; just wanted to point or that there are alternates to the alternates, when it comes to energy.