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'[EE] New form of Hydrogen storage for fuel cells.'
|The following was triggered by a New Scientist articele about a "new"
way of storing Hydrogen for fuel calls. Google reveals it is far from
new, but worth knowing about.
The Stanford intro is superb:
Fuel cell which looks likely to allow practical devices with energy
desnities 3+ times higher than Lithium polymer cells. [[Also ISTM that
a specialist version of this with processing in use (dissolving solids
etc) could produce a system with energy densities several timeshigher
The key factor is H2 storage as a borohydride and release using a
No mention was made of any possible use for Hydrogen storage for
combustion (or propellants :-) ). Volumetric Hydrogen density may well
be high compared with LH but mass wise it's abysmal.
The mines at Boron may yet prove to have been fortuitously located.
Wikipedia well informed thereon
Stanford - very nice 22 page slideshow.
30% BH soln 63g H2/litre
5000 psi GH 23g/l
10,000 psi "G"H 39 g/l
Chemist Don Gervasio and colleague Sonja Tasic, both at Arizona State
University in the US, set out to develop a fuel cell that would
generate more electricity for its weight than the best batteries, and
would also work at room temperature.
Gervasio's solution was to use the alkaline compound borohydride. A
30% solution of borohydride in water actually contains one-third more
hydrogen than the same volume of liquid hydrogen.
"The difference is that the borohydride is at room temperature, and
it's stable, non-toxic and cost-effective," Gervasio says.
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