Sodium-ion battery technology

[shemozzle999]

UK start up company announces results of trials:

http://eandt.theiet.org/news/2015/may/sodium-ion-batteries.cfm

and

http://www.theengineer.co.uk/energy/news/sodium-ion-batteries-set-to-challenge-dominant-lithium-ion-technology/1020369.article

 

[flecc]

Certainly interesting, but nothing ready for market after over four years and much use of the word "could" in both articles makes me cautious.

There's no mention of any disadvantage which is unrealistic, all battery chemistries have fundamental disadvantages.
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