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Furthermore, sodium batteries boast impressive longevity—up to 5 million miles in lifespan—and superior cold-weather performance, remaining chargeable at -30°C without significant speed reductions. These features make sodium batteries promising for energy storage and specific EV applications. However, their current energy densities still lag behind lithium-ion chemistries used in mainstream electric cars, which typically reach around 200 Wh/kg.

Energy Density and Market Adoption

The comparative energy densities of batteries are crucial in determining their suitability for different EV segments. For instance, most North American automakers favor NMC (Nickel Manganese Cobalt) batteries for higher-range vehicles due to their superior energy density (~270-280 Wh/kg).