Hydrogen is not particularly good for aviation: it either requires a lot of cooling, or a really high pressure, and/or leaks through solid containers, or has really poor energy density.
It's a decent intermediary high energy density storage on the ground, where excess renevables can run through a fuel cell and produce hydrogen that can be stored at high pressures and low temperatures in bunker-like containers. Those don't tend to fly very well though, at most swim somewhat decently to deliver the hydrogen wherever its needed.
Hydrogen can be used in rockets though, because of the great oxyhydrogen reaction's efficiency, but you'll notice they tend to leak like crazy... which, once more, is highly undesirable for aviation.
