122
New sodium ion battery stores twice the energy and desalinates seawater
(www.sciencedaily.com)
This is a most excellent place for technology news and articles.
R&d on these I'm guessing takes a little while. And it greatly depends on what niche they fill. Like the poster above said these might have lower density. For applications that move, that's not usually good. How sensitive are they to hot and cold? That could necessitate thermal management.