Safer, very high power to weight ratio, better self discharge stability and good temperature range performance are the advantages. The most important one is of course the lack of massive environmental impact of water hungry lithium mining in dry environments and the geopolitical challenges evident in lithium sourcing.

There are a few electric vehicles with this chemistry and I predict it will replace lithium based chemistries in lower cost, smaller vehicles.

Sodium batteries are already commercially available and although their volumetric energy density and round trip efficiency is lower than lithium I think they are a promising alternative to lead acid and some lithium applications.

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