tag:blogger.com,1999:blog-6486847724120122589.post805340698623629205..comments2024-01-17T00:33:52.893-08:00Comments on credentiality: Aluminum air batteries for extended trips in electric carsLunkwillhttp://www.blogger.com/profile/08543336341601290962noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-6486847724120122589.post-82446597279184713592012-04-21T09:33:07.385-07:002012-04-21T09:33:07.385-07:00Aluminum Air Batteries have an energy density that...Aluminum Air Batteries have an energy density that is around the energy density of gasoline. That means that they take up around the same space as a gasoline tank. That's the up side. <br /><br />The down side is that they are a use once device. The recycling is not quite as easy as was indicated. The residue is Al(OH)3. at room temperature, It is a sticky get. There are several steps in recycling it. <br /><br />The anode is just activated charcoal, while the cathode is basically aluminum foil. There a salt water bath for the electrolyte. There needs to be some barrier between the anode and the cathode. Something like porous Teflon is often used, according to Wikipedia.<br /><br />The batteries, like most batteries, have a limited shelf life, due to internal leakage. Where they are used commercially, the electrolyte is drained when the battery is not in use.<br /><br />In all, it makes for a somewhat complicated system. That is why it hasn't caught on. Building the entire recyclable ecosystem is cost prohibitive for an introductory use case. <br /><br />It would take millions of electric cars to make it usable, and even then, a great deal of additional electric generation would be needed.<br /><br />Standardized battery sizes would also be required. It is doubtful if the manufacturers would all agree or take the chance on the enormous capital outlays for a change to such a system.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-6486847724120122589.post-60097307512761857742012-03-28T23:27:40.864-07:002012-03-28T23:27:40.864-07:00So Al batteries have good energy density by mass, ...So Al batteries have good energy density by mass, but what about by volume? Aluminium isn't exactly the densest material in elemental form...Damien Millerhttps://www.blogger.com/profile/14257661959110958567noreply@blogger.com