This sounds still very academic though and be aware that these things take time to industrialise. Also sometimes it doesn't pan out in the end.
The fire hazard might be reduced but of course any battery storing so much energy in a small place has some kind of hazard. Hopefully the runaway fire providing its own oxygen is solved here though, this is the main reason it's so hard to put the lithium battery fires out.
Havoc•53m ago
nippoo•12m ago
Sodium is actually more reactive than lithium and explodes on contact with water. There's a few things that make the battery chemistry less likely to undergo thermal runaway, but sodium is not a safe metal...