Sodium-sulfur batteries are a promising alternative for energy storage due to their high capacity and potential cost advantages. Research has shown that these batteries can offer four times the energy capacity of lithium-ion batteries, making them attractive for grid-scale applications. However, the cost comparison is not fully established in commercial terms, as sodium-sulfur batteries are still in development stages.
In contrast, sodium-ion batteries, which are more closely comparable to lithium-ion in production and use, show a slight cost advantage. For instance, sodium-ion cells are estimated to cost around $87 per kilowatt-hour, while lithium-ion cells cost about $89 per kilowatt-hour. Sodium-ion technology benefits from the abundance and lower cost of sodium compared to lithium.
Overall, while specific cost data for commercial sodium-sulfur batteries is not readily available, the associated technology promises significant potential for cost reduction and higher capacity compared to lithium-ion batteries.
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