General Discussion, page-586

If you consider the progress in the next types of batteries - solid-state batteries - which will continue to be developed for years to come, it is hard to predict where the range and efficiency will end.Not only are the batteries becoming more and more efficient, but also the motors and electronics.

There are two aspects that remain a possibility for H2 use.
1. SynFuels for air traffic: The ticket costs will then increase significantly.
2. Hydrogen derivatives such as ammonia.Ammonia because the industry has a lot of experience with it and the requirements for transport and storage are much more cost-effective, as it can be liquefied at a pressure of 9 bar or -33°C.