[Elecraft] Re: Li-ion battery

[d.cutter at ntlworld.com]

I wonder just how close these cells are to being classified as explosives.  How does the energy density compare?  Our modern equipment requires higher and higher powers from smaller packages.  

David
G3UNA
> 
> From: RBrigham1 at cs.com
> Date: 2007/01/04 Thu AM 06:35:59 GMT
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] Re: Li-ion battery
> 
> I do not know the exact chemistry of the Lithium-ion battery reactions, but 
> based on my inorganic chemistry experience, it would not surprise me if there 
> is actually metallic lithium in the battery when it is fresh; the lithium gets 
> ionized as the battery is used.  Metallic lithium is like metallic sodium and 
> potassium: it ignites spontaneously in the presence of moisture (releasing 
> flammable hydrogen gas in the process). Once started, it will also burn in air in 
> the absence of moisture.  Lithium-based batteries do store a lot of energy, 
> but it means they have an unfortunate failure mode. Still, they are awfully 
> useful.
> Rob
> KC6ROC
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