They are the future if you believe the institutional/inertial/lobbying power of the century old ICE will be insurmountable. As storage and solar/wind $/kW costs continue to fall, hydrogen is looking less promising.
Interesting note, hydrogen motion is governed more by quantum tunneling than by Fickian diffusion which makes it materially challenging to effectively store at high energy densities. From an infrastructure standpoint, it is much lower in costs to store and transmit electrons than it is atoms (which is intuitive from a simple mass balance argument).
Interesting note, hydrogen motion is governed more by quantum tunneling than by Fickian diffusion which makes it materially challenging to effectively store at high energy densities. From an infrastructure standpoint, it is much lower in costs to store and transmit electrons than it is atoms (which is intuitive from a simple mass balance argument).