Very interesting, this technology is very environmentally friendly .... In my opinion, the problem of hydrogen fuel cell technology exists on two things: polymer, and safe hydrogen generator technology to be made as a fuel supplier.
I think Hydrogen fuel cell technology works quite efficiently, and is very environmentally friendly, and certainly will be great if there is government support, as well as industry.
But it seems that this technology is not appealing enough to investors, maybe they think investing in Hydrogen Fuel Cell technology does not bring sustainable economic benefits. So until now so cool.
They are more interested in producing battery cells so that the current developing technology is cell battery.
So I think it's interesting, environmentally friendly, and efficient.