Quote Originally Posted by Carrabow
The statement should read, "we have never attempted to find new ways to store hydrogen because it would infringe on the oil money".
Not true. Extensive research has gone into it for many decades. I have read an extensive study on it back in the 70ties and followed the technology since then. A H2 based economy is possible, no doubt. All required technologies have been developed and used in the chemical industry for many decades. But despite all efforts it is not very suitable for cars because of the restrictions of storage methods.

Quote Originally Posted by Carrabow
They do it for Saturn V rockets...WTF?
Rockets are a very special case. Cryogenic H2 is used extensively in the space industry. But Cryogenic H2 is liquid only at a temperature of -259.2 °C that is 14°K. It is an energy consuming process to cool it down that far and it is impossible to keep it at this temperature for long. A rocket sitting on the launch pad loses H2 due to warming every minute. With rockets you can do that because it is an expensive technology anyway and the advantages outstrip the drawbacks.

The same does not apply to cars. In cars the disadvantages are far greater. Keep your car fueled up over night and you lose much of your tank content if you use liquid H2.

The second method is storage in gas bottles under pressure. That is the way they store it for welding. Those bottles are extremely heavy and the energy content is very limited compared to conventional fuels. The weight drives the fuel economy down and limits the range.

The third methods is storing the H2 in metal hydrides. The tanks are bulky and expensive. The capacity also limited and you need to heat them up after a stop because they release their content only when hot enough. Not a problem while driving because you can use the engine losses to heat the fuel but it delays the start process and you need to put energy in to get started. It is also a very slow process to fill them up.

So all three possible methods have serious drawbacks in every day use for cars. Liquid can probably be used for buses that run all day long and are empty over night. As I mentioned before it is probably much more economical to convert H2 into hydrocarbons for running cars and use existing infrastructure.