In reply to Michel Jullian's message of Tue, 19 May 2009 15:31:41 +0200: Hi, [snip] >The Nature Materials abstract is here (full text is subscription only): > >http://www.nature.com/nmat/journal/vaop/ncurrent/abs/nmat2460.html > ><<Reversible capacities up to 1,320 mA h g-1 are attained>> > >The Li-S battery voltage being 2.0V, this would amount to 1320*2.0 = >2640 mWh/g = 2640 Wh/kg, which is HUGE, the current best specific >energy density for rechargeable batteries being Li polymer with 200 >Wh/kg according to: > >http://en.wikipedia.org/wiki/Rechargeable_battery#Table_of_rechargeable_battery_technologies > >So this would be a most impressive 13x improvement, I wonder why Nazar >claims only 3x in her comment below.? > >Michel
Note the "up to", which implies that they are getting variable results, of which this was the best. Furthermore, I think the number of charge cycles may as yet be rather limited, as was previously intimated. IOW there is still some work to do before this becomes a commercially feasible product. Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/Project.html
