[Blammar]

There's no actual storage density information, is there? Nothing in KJ/m^3 units.

Ball milling to shove gas into nanoparticles seems counterintuitive, as ball milling is typically used to grind particles smaller.

I could imagine if we really had nanodust of BN+20H2 (or whatever) that it'd be (a) potentially very combustible (b) potentially dangerous to lungs when inhaled. (Presumably, at some temperature, hydrogen begins to be released, and if you then ignite that hydrogen, I could imagine a runaway reaction.)

I really want this or something similar to work.

Maybe the simpler thing to do is to develop a solar cell that produces methanol (or ethanol) directly from sunlight, CO2, and water, and then just have a methanol engine. Should be able to burn methanol and produce CO2/water exhaust only.

[mwt]

> There's no actual storage density information, is there? Nothing in KJ/m^3 units.

Even if there was (to be honest, didn't read the journal article) this is something that can easily be hacked. Energy storage research papers regularly hack energy density numbers by reporting the kJ/cc values of a tiny (like order 1 g) fleck of nanoparticle dust, which totally misrepresents the physics that matters are scale (i.e. in an EV).

Scaling up stuff is hard, including when you're moving from micron scale to cm scale.