Awesome, great work!
Always a good thing to have your common made things, out of something that isn't a rare mineral.

I think that is good news for battery and hybrid vehicles.

Lithium isn't that rare. There may be a temporaray shortage because AFAIK demand is going up so fast that production can't keep up, but the element itself is plentiful. There are gigantic reserves that have remained untapped so far, and the batteries are fully recyclable.

Super good news!

No info about charge cycles, voltage, amphours? At least it was compared to the lifepo4 which still retains about 80% of capacity after 2,000 charge/discharge cycles. However, I don't believe the sodium ion would last that long. Eventually, research on the material sciences of graphene might make a better battery and a stronger "ship".

This could be a game changer. Just as people are figuring out how to dramatically increase efficiency of portable fuel power, we are about to make it obsolete.

Wonder how much improvement in energy density is possible, and what kind of power density is possible.
A123 LiFePO4s have about the same energy density, and about 30 A delivery from a single 18650 (at 39 g). However, a modern LiNiCoAl battery has about 2.5x the energy density (but only about 10 A delivery from a ~46.5 g cell).

Super cool

Very interesting, would love some more concrete numbers on these batteries like haw fast do they charge, how does partial charging affect them - do they have memory problems, how long do they last compared to your run-of-the-mill li-ion batteries?
How well do the scale - would they be good for cheap grid storage? Or for home solar PV battery backup?

Given its disadvantages against lithium I would concentrate my development for more stationary applications like storing solar for night use.