You mean fires, not explosions. Also, many things have exploded or caught on fire. Including existing gas stations.

Then why mention energy density if you ultimately don't think it matters? It will mean much lighter cars and more range. You should be suspicious of those who don't want those options.

Except that hydrogen just gained 80% more energy density right now. You should read the article.

In fact, it has already exceeded the theoretical limits of any conventional battery chemistry. So in some sense the war is already over on this subject.

Liquid fuels are also pretty explosive. So are li-ion batteries. We are not in any more danger.

An explosion is unlikely. You need a very thorough mix of air and hydrogen for there to be an explosion. It is not likely to happen in a conventional accident.

It will likely just vent out quickly. Any fire would be brief. Hydrogen is safer than gasoline in a fire because it does not stay in place very long.

> Brunner explains that a cryo-compressed hydrogen storage system “is an insulated pressure vessel that you overfill with cold H2 gas — what we call CRYOGAS — that has 80% higher density than ambient temperature H2 gas at 700 bar, up to 80 grams/liter.” Higher density enables storing more H2 fuel in the tank for longer range.

Cryo-compressed hydrogen, or CCH₂, allows you to store hydrogen at a much higher density than conventional methods. It is about 80% higher than compressed hydrogen at 700 bar, or up to 80 grams per liter. This will make storing hydrogen significantly easier. This is important to the future of energy storage and transportation.

We could've built nuclear power plants decades ago and drastically scale back our CO₂ emissions. But sadly humanity has been very stupid and chose much less practical ideas.