Power Air Corp [RE-wrenches]

[William Korthof]

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Zinc-air is an interesting battery chemistry. It differs from other 
battery options in that generally, the active materials are recharged 
externally (replace electrolyte/plates) rather than simply reversing the 
current. But it's also not really a fuel cell... the fundamental cost is 
very reasonable (zinc is cheap) and efficiency is intermediate (~40%). 
Zinc air batteries yield high specific energy but low power density: 
such as  200 watt-hours per kilogram and 200 watts per kilogram (peak 
output). That makes it competive with lithium with respect to specific 
energy, but on par with sealed lead acid batteries for power... kind of 
weak.

All zinc-air battery ventures to date have suffered from the mechanical 
limitation of the zinc-air chemistry: mechanical recharging (requires 
centralized electrichemical reprocessing---and the performance problems: 
about half the efficiency of conventional battery systems and much lower 
power density than advanced batteries (lithium, NiMH).

Whether this company has anything to offer is unclear.

/wk


William Miller wrote:
> 
> Friends:
> 
> I have a client that is threatening to invest money in this company:  
> http://www.poweraircorp.com/
> 
> Anyone have any information on this?
> 
> William Miller
> 
> 
> __________________________________________________________________
> William Miller
> Miller Power and Communications
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> email: wrmiller at mpandc.com
> http://mpandc.com
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