Comment Re:Li-ion batteries (Score 4, Funny) 120
Which has absolutely nothing to do with the subject. The article is well worth reading. What's kept NA-ion batteries away is that their anodes only last 20 cycles. They solved the problem with wood fibers covered with carbon nanotubes, and these can stand hundreds of cycles.
Again, TFA is worth reading.
Now waiting for the inevitable "that article gave me wood" joke...