Generally speaking, thermal runaway is not the lithium reacting directly with water in the air, it's a self oxidizing fire-- The electrolyte fluid is combustable, metal oxides in the anode material release oxygen when heated and a short circuit provides the heat and ignition source.
Twisted SWCNT is still mostly a concept. Doesn't even have proof of concept in the lab. According to people involved in it, it may take a couple of decades to go to market. But I agree, it would be great to have " wind up" cars, for example.
Business idea: form dense shipping containers of addressed arrays of [twisted SWCNT, rhombohedral trilayer graphene, or double-gated graphene,]? They would need: anodes, industry standard commercial and residential solar connectors, water-safe EV charge connectors, and/or "Mega pack" connectors to jump charge semi-trucks from a container on a flatbed or a sprinter van.
Branded, stackable Intermodal shipping containers with charge controllers
It's probably already possible to thermoform and ground biocomposite shipping containers, with ocean recovery loops?
When current gen EV batteries catch fire in fresh and saltwater flood waters, is that due to thermal runaway?
(Twisted SWCNT carbon nanotubes don't have these risks at all FWIU)